Release 0.6.2

Lock drawer with gravity parameter instead of a view
Fix a crash when retrying pages
2025-06-26 11:07:51 +02:00 · 2017-09-09 14:00:21 +02:00 · 2017-09-08 18:18:27 +02:00 · 2017-09-08 17:59:43 +02:00 · 2017-09-08 17:43:46 +02:00 · 2017-09-08 17:25:44 +02:00
702 changed files with 38098 additions and 19866 deletions
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@ -1,19 +1,27 @@
+1. **Before reporting a new issue, take a look at the [FAQ](https://github.com/inorichi/tachiyomi/wiki/FAQ), the [changelog](https://github.com/inorichi/tachiyomi/releases) and the already opened [issues](https://github.com/inorichi/tachiyomi/issues).**
+2. If you are unsure, ask here: [![Discord](https://img.shields.io/discord/349436576037732353.svg)](https://discord.gg/WrBkRk4)
+3. What is your type of issue?
+    * [Catalogue request](#catalogue-requests)
+    * [Bugs](#bugs)
+    * [Feature requests](#feature-requests)
+    * [Translations](https://github.com/inorichi/tachiyomi/wiki/Translation)
+4. After following 1. and 3. you can [open your issue](https://github.com/inorichi/tachiyomi/issues/new)
+
+***
+
+# Catalogue requests
+
+* Catalogue requests should be created at https://github.com/inorichi/tachiyomi-extensions#readme, not here
+
 # Bugs
 * Include version (Setting > About > Version)
 * If not latest, try updating, it may have already been solved
- * Debug version is equal to the number of commits as seen in the main page
+ * Dev version is equal to the number of commits as seen in the main page
 * Include steps to reproduce (if not obvious from description)
 * Include screenshot (if needed)
-* If it could be device-dependent, try reproducing on another device (if possible),  include results and device names, OS, modifications (root, Xposed)
-* **Before reporting a new issue, take a look at the [FAQ](https://github.com/inorichi/tachiyomi/wiki/FAQ), the [changelog](https://github.com/inorichi/tachiyomi/releases) and the already opened [issues](https://github.com/inorichi/tachiyomi/issues).**
+* If it could be device-dependent, try reproducing on another device (if possible)
 * For large logs use http://pastebin.com/ (or similar)
-* For multipart issues use list like this:
- * [x] Done
- * [ ] Not done
-```
-* [x] Done
-* [ ] Not done
-```
+* Don't group unrelated requests into one issue

 DO: https://github.com/inorichi/tachiyomi/issues/24 https://github.com/inorichi/tachiyomi/issues/71

@ -23,8 +31,3 @@ DON'T: https://github.com/inorichi/tachiyomi/issues/75

 * Write a detailed issue, explaning what it should do or how. Avoid writing just "like X app does"
 * Include screenshot (if needed)
-
-# Translations
-
-File `app/src/main/res/values/strings.xml` should be copied over to appropriate directories and then translated.
-Consult [Android.com](http://developer.android.com/training/basics/supporting-devices/languages.html#CreateDirs)
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@ -1,7 +1 @@
 **Please read https://github.com/inorichi/tachiyomi/blob/master/.github/CONTRIBUTING.md before posting**
-
-Remove line above and describe your issue here. Fill out version below. Use Preview.
-
-
-Version: r000 or v0.0.0
-(other relevant info like OS)
--- a/.travis.yml
+++ b/.travis.yml
@ -5,17 +5,30 @@ android:
    - tools

    # The BuildTools version used by your project
-    - build-tools-23.0.3
-    - android-23
+    - build-tools-25.0.1
+    - android-25
    - extra-android-m2repository
    - extra-google-m2repository
    - extra-android-support
    - extra-google-google_play_services

+  licenses:
+    - android-sdk-license-.+
+    - '.+'
+
+jdk:
+  - oraclejdk8
+
 before_script:
-    - chmod +x gradlew
+  - chmod +x gradlew
+
+before_install:
+  - mkdir "$ANDROID_HOME/licenses" || true
+  - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55" > "$ANDROID_HOME/licenses/android-sdk-license"
+  - echo -e "\n84831b9409646a918e30573bab4c9c91346d8abd" > "$ANDROID_HOME/licenses/android-sdk-preview-license"
+
 #Build, and run tests
-script: "./gradlew clean assembleDebug testDebugUnitTest"
+script: "./gradlew clean buildStandardDebug"
 sudo: false

 before_cache:
@ -25,4 +38,4 @@ cache:
    - $HOME/.gradle/caches/
    - $HOME/.gradle/wrapper/
 env:
-  - GRADLE_OPTS="-XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"
+  - GRADLE_OPTS="-XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"
--- a/README.md
+++ b/README.md
@ -1,10 +1,11 @@
-| Build | Download | Auto Update |
-|-------|----------|-------------|
-| [![TeamCity (simple build status)](https://img.shields.io/teamcity/https/teamcity.kanade.eu/s/tachiyomi_Build.svg)](https://teamcity.kanade.eu/project.html?projectId=tachiyomi) [![Travis](https://img.shields.io/travis/inorichi/tachiyomi.svg)](https://travis-ci.org/inorichi/tachiyomi) | [![stable release](https://img.shields.io/badge/stable-v0.2.1-blue.svg)](https://github.com/inorichi/tachiyomi/releases) [![latest dev build](https://img.shields.io/badge/dev-latest%20build-blue.svg)](http://tachiyomi.kanade.eu/latest/app-debug.apk) | [![fdroid release](https://img.shields.io/badge/stable-F--Droid-blue.svg)](https://f-droid.org/repository/browse/?fdid=eu.kanade.tachiyomi) [![fdroid debug](https://img.shields.io/badge/dev-F--Droid-blue.svg)](//github.com/inorichi/tachiyomi/wiki/FDroid-for-debug-versions) |
+| Build | Download | F-Droid | Contribute | Contact |
+|-------|----------|---------|------------|---------|
+| [![TeamCity (simple build status)](https://img.shields.io/teamcity/https/teamcity.kanade.eu/s/tachiyomi_Build.svg)](https://teamcity.kanade.eu/project.html?projectId=tachiyomi) [![Travis](https://img.shields.io/travis/inorichi/tachiyomi.svg)](https://travis-ci.org/inorichi/tachiyomi) | [![stable release](https://img.shields.io/github/release/inorichi/tachiyomi.svg?maxAge=3600&label=stable)](https://github.com/inorichi/tachiyomi/releases) [![latest dev build](https://img.shields.io/badge/dev-latest%20build-blue.svg)](http://tachiyomi.kanade.eu/latest/app-debug.apk) | [![fdroid release](https://img.shields.io/badge/stable-f--droid.org-blue.svg)](https://f-droid.org/repository/browse/?fdid=eu.kanade.tachiyomi) [![fdroid dev](https://img.shields.io/badge/dev-wiki-blue.svg)](//github.com/inorichi/tachiyomi/wiki/FDroid-for-dev-versions) | [![Translation status](http://weblate.j2ghz.com/widgets/tachiyomi/-/svg-badge.svg)](https://github.com/inorichi/tachiyomi/wiki/Translation) | [![Discord](https://img.shields.io/discord/349436576037732353.svg)](https://discord.gg/WrBkRk4) |

-## [Report an issue](https://github.com/inorichi/tachiyomi/blob/master/.github/CONTRIBUTING.md)
+### **Contact us on [Discord](https://discord.gg/WrBkRk4)**
+If you want to open an issue, please read [contributing guidelines](https://github.com/inorichi/tachiyomi/blob/master/.github/CONTRIBUTING.md). Your issue may be closed otherwise.

-**Before reporting a new issue, take a look at the [FAQ](https://github.com/inorichi/tachiyomi/wiki/FAQ), the [changelog](https://github.com/inorichi/tachiyomi/releases) and the already opened issues.**
+***

 Tachiyomi is a free and open source manga reader for Android.

--- a/app/.gitignore
+++ b/app/.gitignore
@ -1,4 +1,4 @@
 /build
 *iml
 *.iml
-.idea
+custom.gradle
--- a/app/build.gradle
+++ b/app/build.gradle
@ -4,11 +4,15 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'

+if (file("custom.gradle").exists()) {
+    apply from: "custom.gradle"
+}
+
 ext {
    // Git is needed in your system PATH for these commands to work.
    // If it's not installed, you can return a random value as a workaround
    getCommitCount = {
-        return 'git rev-list --count origin/master'.execute().text.trim()
+        return 'git rev-list --count HEAD'.execute().text.trim()
        // return "1"
    }

@ -24,43 +28,57 @@ ext {
    }
 }

-def includeUpdater() {
-    return hasProperty("include_updater")
-}
-
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
    publishNonDefault true

    defaultConfig {
        applicationId "eu.kanade.tachiyomi"
        minSdkVersion 16
-        targetSdkVersion 23
+        targetSdkVersion 25
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-        versionCode project.getProperties().get("versionCode")?.toInteger() ?: 7
-        versionName "0.2.1"
+        versionCode 25
+        versionName "0.6.2"

        buildConfigField "String", "COMMIT_COUNT", "\"${getCommitCount()}\""
        buildConfigField "String", "COMMIT_SHA", "\"${getGitSha()}\""
        buildConfigField "String", "BUILD_TIME", "\"${getBuildTime()}\""
-        buildConfigField "boolean", "INCLUDE_UPDATER", "${includeUpdater()}"
+        buildConfigField "boolean", "INCLUDE_UPDATER", "false"

        vectorDrawables.useSupportLibrary = true
+
+        ndk {
+            abiFilters "armeabi-v7a", "arm64-v8a", "x86"
+        }
    }

    buildTypes {
        debug {
-            versionNameSuffix ".${getCommitCount()}"
+            versionNameSuffix "-${getCommitCount()}"
            applicationIdSuffix ".debug"
+            multiDexEnabled true
        }
        release {
            minifyEnabled true
            shrinkResources true
+            multiDexEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

+    productFlavors {
+        standard {
+            buildConfigField "boolean", "INCLUDE_UPDATER", "true"
+        }
+        fdroid {
+        }
+        dev {
+            minSdkVersion 21
+            resConfigs "en", "xxhdpi"
+        }
+    }
+
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'LICENSE.txt'
@ -74,114 +92,132 @@ android {
        checkReleaseBuilds false
    }

-    sourceSets {
-        main.java.srcDirs += 'src/main/kotlin'
-    }
-
-    // http://stackoverflow.com/questions/32759529/androidhttpclient-not-found-when-running-robolectric
-    useLibrary 'org.apache.http.legacy'
-
-}
-
-kapt {
-    generateStubs = true
 }

 dependencies {
-    final SUPPORT_LIBRARY_VERSION = '23.3.0'
-    final DAGGER_VERSION = '2.2'
-    final OKHTTP_VERSION = '3.2.0'
-    final RETROFIT_VERSION = '2.0.1'
-    final STORIO_VERSION = '1.8.0'
-    final MOCKITO_VERSION = '1.10.19'

    // Modified dependencies
-    compile 'com.github.inorichi:subsampling-scale-image-view:421fb81'
-    compile 'com.github.inorichi:ReactiveNetwork:69092ed'
+    compile 'com.github.inorichi:subsampling-scale-image-view:01e5385'
+    compile 'com.github.inorichi:tachimage:68cd311'
+    compile 'com.github.inorichi:junrar-android:634c1f5'

    // Android support library
-    compile "com.android.support:support-v4:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:appcompat-v7:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:cardview-v7:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:design:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:recyclerview-v7:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:support-annotations:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:percent:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:preference-v7:$SUPPORT_LIBRARY_VERSION"
-    compile "com.android.support:preference-v14:$SUPPORT_LIBRARY_VERSION"
+    final support_library_version = '25.4.0'
+    compile "com.android.support:support-v4:$support_library_version"
+    compile "com.android.support:appcompat-v7:$support_library_version"
+    compile "com.android.support:cardview-v7:$support_library_version"
+    compile "com.android.support:design:$support_library_version"
+    compile "com.android.support:recyclerview-v7:$support_library_version"
+    compile "com.android.support:support-annotations:$support_library_version"
+    compile "com.android.support:customtabs:$support_library_version"
+
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+
+    compile 'com.android.support:multidex:1.0.1'

    // ReactiveX
-    compile 'io.reactivex:rxandroid:1.1.0'
-    compile 'io.reactivex:rxjava:1.1.1'
-    compile 'com.f2prateek.rx.preferences:rx-preferences:1.0.1'
+    compile 'io.reactivex:rxandroid:1.2.1'
+    compile 'io.reactivex:rxjava:1.3.0'
+    compile 'com.jakewharton.rxrelay:rxrelay:1.2.0'
+    compile 'com.f2prateek.rx.preferences:rx-preferences:1.0.2'
+    compile 'com.github.pwittchen:reactivenetwork:0.7.0'

    // Network client
-    compile "com.squareup.okhttp3:okhttp:$OKHTTP_VERSION"
-    compile "com.squareup.okhttp3:okhttp-urlconnection:$OKHTTP_VERSION"
+    compile "com.squareup.okhttp3:okhttp:3.8.1"
+    compile 'com.squareup.okio:okio:1.13.0'

    // REST
-    compile "com.squareup.retrofit2:retrofit:$RETROFIT_VERSION"
-    compile "com.squareup.retrofit2:converter-gson:$RETROFIT_VERSION"
-    compile "com.squareup.retrofit2:adapter-rxjava:$RETROFIT_VERSION"
-
-    // IO
-    compile 'com.squareup.okio:okio:1.7.0'
+    final retrofit_version = '2.3.0'
+    compile "com.squareup.retrofit2:retrofit:$retrofit_version"
+    compile "com.squareup.retrofit2:converter-gson:$retrofit_version"
+    compile "com.squareup.retrofit2:adapter-rxjava:$retrofit_version"

    // JSON
-    compile 'com.google.code.gson:gson:2.6.2'
+    compile 'com.google.code.gson:gson:2.8.1'
+    compile 'com.github.salomonbrys.kotson:kotson:2.5.0'

-    // Disk cache
+    // YAML
+    compile 'com.github.bmoliveira:snake-yaml:v1.18-android'
+
+    // JavaScript engine
+    compile 'com.squareup.duktape:duktape-android:1.1.0'
+
+    // Disk
    compile 'com.jakewharton:disklrucache:2.0.2'
+    compile 'com.github.seven332:unifile:1.0.0'

-    // Parse HTML
-    compile 'org.jsoup:jsoup:1.8.3'
+    // HTML parser
+    compile 'org.jsoup:jsoup:1.10.2'
+
+    // Job scheduling
+    compile 'com.evernote:android-job:1.1.11'
+    compile 'com.google.android.gms:play-services-gcm:11.0.1'
+
+    // Changelog
+    compile 'com.github.gabrielemariotti.changeloglib:changelog:2.1.0'

    // Database
-    compile "com.pushtorefresh.storio:sqlite:$STORIO_VERSION"
-    compile "com.pushtorefresh.storio:sqlite-annotations:$STORIO_VERSION"
-    kapt "com.pushtorefresh.storio:sqlite-annotations-processor:$STORIO_VERSION"
+    compile "com.pushtorefresh.storio:sqlite:1.13.0"

    // Model View Presenter
-    compile 'info.android15.nucleus:nucleus:3.0.0-beta'
+    final nucleus_version = '3.0.0'
+    compile "info.android15.nucleus:nucleus:$nucleus_version"
+    compile "info.android15.nucleus:nucleus-support-v7:$nucleus_version"

    // Dependency injection
-    compile "com.google.dagger:dagger:$DAGGER_VERSION"
-    kapt "com.google.dagger:dagger-compiler:$DAGGER_VERSION"
-    provided 'org.glassfish:javax.annotation:10.0-b28'
+    compile "uy.kohesive.injekt:injekt-core:1.16.1"

    // Image library
-    compile 'com.github.bumptech.glide:glide:3.7.0'
+    compile 'com.github.bumptech.glide:glide:3.8.0'
+    compile 'com.github.bumptech.glide:okhttp3-integration:1.5.0@aar'
+    // Transformations
+    compile 'jp.wasabeef:glide-transformations:2.0.2'

    // Logging
-    compile 'com.jakewharton.timber:timber:4.1.2'
+    compile 'com.jakewharton.timber:timber:4.5.1'

    // Crash reports
-    compile 'ch.acra:acra:4.8.5'
+    compile 'ch.acra:acra:4.9.2'
+
+    // Sort
+    compile 'com.github.gpanther:java-nat-sort:natural-comparator-1.1'

    // UI
+    compile 'com.dmitrymalkovich.android:material-design-dimens:1.4'
    compile 'com.github.dmytrodanylyk.android-process-button:library:1.0.4'
-    compile 'eu.davidea:flexible-adapter:4.2.0'
+    compile 'eu.davidea:flexible-adapter:5.0.0-rc1'
    compile 'com.nononsenseapps:filepicker:2.5.2'
    compile 'com.github.amulyakhare:TextDrawable:558677e'
-    compile('com.github.afollestad.material-dialogs:core:0.8.5.5@aar') {
-        transitive = true
-    }
+    compile 'com.afollestad.material-dialogs:core:0.9.4.5'
+    compile 'me.zhanghai.android.systemuihelper:library:1.0.0'
+    compile 'com.nightlynexus.viewstatepageradapter:viewstatepageradapter:1.0.4'
+
+    // Conductor
+    compile "com.bluelinelabs:conductor:2.1.4"
+    compile 'com.github.inorichi:conductor-support-preference:9e36460'
+
+    // RxBindings
+    final rxbindings_version = '1.0.1'
+    compile "com.jakewharton.rxbinding:rxbinding-kotlin:$rxbindings_version"
+    compile "com.jakewharton.rxbinding:rxbinding-appcompat-v7-kotlin:$rxbindings_version"
+    compile "com.jakewharton.rxbinding:rxbinding-support-v4-kotlin:$rxbindings_version"
+    compile "com.jakewharton.rxbinding:rxbinding-recyclerview-v7-kotlin:$rxbindings_version"

    // Tests
    testCompile 'junit:junit:4.12'
    testCompile 'org.assertj:assertj-core:1.7.1'
-    testCompile "org.mockito:mockito-core:$MOCKITO_VERSION"
-    testCompile('org.robolectric:robolectric:3.0') {
-        exclude group: 'commons-logging', module: 'commons-logging'
-        exclude group: 'org.apache.httpcomponents', module: 'httpclient'
-    }
+    testCompile 'org.mockito:mockito-core:1.10.19'
+
+    final robolectric_version = '3.1.4'
+    testCompile "org.robolectric:robolectric:$robolectric_version"
+    testCompile "org.robolectric:shadows-multidex:$robolectric_version"
+    testCompile "org.robolectric:shadows-play-services:$robolectric_version"

-    kaptTest "com.google.dagger:dagger-compiler:$DAGGER_VERSION"
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }

 buildscript {
-    ext.kotlin_version = '1.0.1'
+    ext.kotlin_version = '1.1.4'
    repositories {
        mavenCentral()
    }
@ -193,3 +229,50 @@ buildscript {
 repositories {
    mavenCentral()
 }
+
+// Workaround to force a support lib version
+configurations.all {
+    resolutionStrategy.eachDependency { details ->
+        def requested = details.requested
+        if (requested.group == 'com.android.support') {
+            if (!requested.name.startsWith("multidex")) {
+                details.useVersion '25.4.0'
+            }
+        }
+    }
+}
+
+// add support for placeholders in resource files
+//https://code.google.com/p/android/issues/detail?id=69224
+def replacePlaceholdersInFile(basePath, fileName, placeholders) {
+    def file = new File(basePath, fileName);
+
+    if (!file.exists()) {
+        logger.quiet("Unable to replace placeholders in " + file.toString() + ". File cannot be found.")
+        return;
+    }
+
+    logger.debug("Replacing placeholders in " + file.toString())
+    logger.debug("Placeholders: " + placeholders.toString())
+
+    def content = file.getText('UTF-8')
+
+    placeholders.each { entry ->
+        content = content.replaceAll("\\\$\\{${entry.key}\\}", entry.value)
+    }
+
+    file.write(content, 'UTF-8')
+}
+
+afterEvaluate {
+    android.applicationVariants.all { variant ->
+        variant.outputs.each { output ->
+            output.processResources.doFirst {
+                // prepare placeholder map from manifestPlaceholders including applicationId placeholder
+                def placeholders = variant.mergedFlavor.manifestPlaceholders + [applicationId: variant.applicationId]
+
+                replacePlaceholdersInFile(resDir, 'xml-v25/shortcuts.xml', placeholders)
+            }
+        }
+    }
+}
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@ -1,20 +1,24 @@
 -dontobfuscate

-keep class eu.kanade.tachiyomi.injection.** { *; }
+-dontwarn eu.kanade.tachiyomi.**
+-keep class eu.kanade.tachiyomi.**
+-keep class eu.kanade.tachiyomi.source.model.** { *; }
+
+-keep class com.hippo.image.** { *; }
+-keep interface com.hippo.image.** { *; }
+
+# Extensions may require methods unused in the core app
+-keep class org.jsoup.** { *; }
+-keep class kotlin.** { *; }
+-keep class okhttp3.** { *; }
+-keep class com.google.gson.** { *; }
+-keep class com.github.salomonbrys.kotson.** { *; }

 # OkHttp
-keepattributes Signature
-keepattributes *Annotation*
-keep class okhttp3.** { *; }
-keep interface okhttp3.** { *; }
 -dontwarn okhttp3.**
 -dontwarn okio.**
-
-# Okio
-keep class sun.misc.Unsafe { *; }
-dontwarn java.nio.file.*
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
-dontwarn okio.**
+-dontwarn javax.annotation.**
+-dontwarn retrofit2.Platform$Java8

 # Glide specific rules #
 # https://github.com/bumptech/glide
@ -40,82 +44,47 @@
    rx.internal.util.atomic.LinkedQueueNode consumerNode;
 }

-# Retrofit 2.X
-## https://square.github.io/retrofit/ ##
+### Support v7, Design
+# http://stackoverflow.com/questions/29679177/cardview-shadow-not-appearing-in-lollipop-after-obfuscate-with-proguard/29698051
+-keep class android.support.v7.widget.RoundRectDrawable { *; }

-dontwarn retrofit2.**
-keep class retrofit2.** { *; }
-keepattributes Signature
-keepattributes Exceptions
-
-keepclasseswithmembers class * {
-    @retrofit2.http.* <methods>;
-}
-
-# AppCombat
 -keep public class android.support.v7.widget.** { *; }
 -keep public class android.support.v7.internal.widget.** { *; }
 -keep public class android.support.v7.internal.view.menu.** { *; }
+-keep public class android.support.v7.graphics.drawable.** { *; }

 -keep public class * extends android.support.v4.view.ActionProvider {
    public <init>(android.content.Context);
 }

-## GSON 2.2.4 specific rules ##
+-dontwarn android.support.**
+-dontwarn android.support.design.**
+-keep class android.support.design.** { *; }
+-keep interface android.support.design.** { *; }
+-keep public class android.support.design.R$* { *; }
+
+
+# ReactiveNetwork
+-dontwarn com.github.pwittchen.reactivenetwork.**
+
+## GSON ##

 # Gson uses generic type information stored in a class file when working with fields. Proguard
 # removes such information by default, so configure it to keep all of it.
 -keepattributes Signature

-# For using GSON @Expose annotation
-keepattributes *Annotation*
-
-keepattributes EnclosingMethod
-
 # Gson specific classes
 -keep class sun.misc.Unsafe { *; }
-keep class com.google.gson.stream.** { *; }

-## ACRA 4.5.0 specific rules ##
+# Prevent proguard from stripping interface information from TypeAdapterFactory,
+# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
+-keep class * implements com.google.gson.TypeAdapterFactory
+-keep class * implements com.google.gson.JsonSerializer
+-keep class * implements com.google.gson.JsonDeserializer

-# we need line numbers in our stack traces otherwise they are pretty useless
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
+# SnakeYaml
+-keep class org.yaml.snakeyaml.** { public protected private *; }
+-dontwarn org.yaml.snakeyaml.**

-# ACRA needs "annotations" so add this...
-keepattributes *Annotation*
-
-# keep this class so that logging will show 'ACRA' and not a obfuscated name like 'a'.
-# Note: if you are removing log messages elsewhere in this file then this isn't necessary
-keep class org.acra.ACRA {
-	*;
-}
-
-# keep this around for some enums that ACRA needs
-keep class org.acra.ReportingInteractionMode {
-    *;
-}
-
-keepnames class org.acra.sender.HttpSender$** {
-    *;
-}
-
-keepnames class org.acra.ReportField {
-    *;
-}
-
-# keep this otherwise it is removed by ProGuard
-keep public class org.acra.ErrorReporter {
-    public void addCustomData(java.lang.String,java.lang.String);
-    public void putCustomData(java.lang.String,java.lang.String);
-    public void removeCustomData(java.lang.String);
-}
-
-# keep this otherwise it is removed by ProGuard
-keep public class org.acra.ErrorReporter {
-    public void handleSilentException(java.lang.Throwable);
-}
-
-# Keep the support library
-keep class org.acra.** { *; }
-keep interface org.acra.** { *; }
+# Duktape
+-keep class com.squareup.duktape.** { *; }
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@ -1,107 +1,103 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="eu.kanade.tachiyomi">
+    package="eu.kanade.tachiyomi">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
-    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />

    <application
        android:name=".App"
        android:allowBackup="true"
        android:hardwareAccelerated="true"
        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher_round"
        android:label="@string/app_name"
        android:largeHeap="true"
-        android:theme="@style/Theme.Tachiyomi" >
+        android:theme="@style/Theme.Tachiyomi">
        <activity
            android:name=".ui.main.MainActivity"
-            android:theme="@style/Theme.BrandedLaunch">
+            android:launchMode="singleTop">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
-        </activity>
-        <activity
-            android:name=".ui.manga.MangaActivity"
-            android:parentActivityName=".ui.main.MainActivity" >
+            <meta-data android:name="android.app.shortcuts"
+                android:resource="@xml/shortcuts"/>
        </activity>
        <activity
            android:name=".ui.reader.ReaderActivity"
-            android:theme="@style/Theme.Reader">
-        </activity>
+            android:theme="@style/Theme.Reader" />
        <activity
-            android:name=".ui.setting.SettingsActivity"
-            android:label="@string/label_settings"
-            android:parentActivityName=".ui.main.MainActivity" >
-        </activity>
-        <activity
-            android:name=".ui.category.CategoryActivity"
-            android:label="@string/label_categories"
-            android:parentActivityName=".ui.main.MainActivity">
-        </activity>
-        <activity
-            android:name=".ui.setting.SettingsDownloadsFragment$CustomLayoutPickerActivity"
+            android:name=".widget.CustomLayoutPickerActivity"
            android:label="@string/app_name"
-            android:theme="@style/FilePickerTheme">
+            android:theme="@style/FilePickerTheme" />
+        <activity
+            android:name=".ui.setting.AnilistLoginActivity"
+            android:label="Anilist">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:host="anilist-auth"
+                    android:scheme="tachiyomi" />
+            </intent-filter>
        </activity>

-        <service android:name=".data.library.LibraryUpdateService"
+        <provider
+            android:name="android.support.v4.content.FileProvider"
+            android:authorities="${applicationId}.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/provider_paths" />
+        </provider>
+
+        <provider
+            android:name="eu.kanade.tachiyomi.util.ZipContentProvider"
+            android:authorities="${applicationId}.zip-provider"
+            android:exported="false" />
+
+        <provider
+            android:name="eu.kanade.tachiyomi.util.RarContentProvider"
+            android:authorities="${applicationId}.rar-provider"
+            android:exported="false" />
+
+        <receiver
+            android:name=".data.notification.NotificationReceiver"
+            android:exported="false" />
+
+        <service
+            android:name=".data.library.LibraryUpdateService"
+            android:exported="false" />
+
+        <service
+            android:name=".data.download.DownloadService"
+            android:exported="false" />
+
+        <service
+            android:name=".data.updater.UpdateDownloaderService"
+            android:exported="false" />
+
+        <service
+            android:name=".data.backup.BackupCreateService"
            android:exported="false"/>

-        <service android:name=".data.download.DownloadService"
+        <service
+            android:name=".data.backup.BackupRestoreService"
            android:exported="false"/>

-        <service android:name=".data.mangasync.UpdateMangaSyncService"
-            android:exported="false"/>
-
-        <receiver
-            android:name=".data.library.LibraryUpdateService$SyncOnConnectionAvailable"
-            android:enabled="false">
-            <intent-filter>
-                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
-            </intent-filter>
-        </receiver>
-
-        <receiver
-            android:name=".data.library.LibraryUpdateService$SyncOnPowerConnected"
-            android:enabled="false">
-            <intent-filter>
-                <action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
-            </intent-filter>
-        </receiver>
-
-        <receiver
-            android:name=".data.library.LibraryUpdateService$CancelUpdateReceiver">
-        </receiver>
-
-        <receiver
-            android:name=".data.updater.UpdateDownloader$InstallOnReceived">
-        </receiver>
-
-        <receiver
-            android:name=".data.library.LibraryUpdateAlarm">
-            <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED"/>
-                <action android:name="eu.kanade.UPDATE_LIBRARY" />
-            </intent-filter>
-        </receiver>
-
-        <receiver
-            android:name=".data.updater.UpdateDownloaderAlarm">
-            <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED"/>
-                <action android:name="eu.kanade.CHECK_UPDATE"/>
-            </intent-filter>
-        </receiver>
-
-
        <meta-data
-            android:name="eu.kanade.tachiyomi.data.cache.CoverGlideModule"
+            android:name="eu.kanade.tachiyomi.data.glide.AppGlideModule"
            android:value="GlideModule" />

    </application>
--- a/app/src/main/ic_launcher-web.png
+++ b/app/src/main/ic_launcher-web.png
--- a/app/src/main/java/eu/kanade/tachiyomi/App.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/App.kt
@ -2,61 +2,67 @@ package eu.kanade.tachiyomi

 import android.app.Application
 import android.content.Context
-import eu.kanade.tachiyomi.data.preference.PreferencesHelper
-import eu.kanade.tachiyomi.injection.ComponentReflectionInjector
-import eu.kanade.tachiyomi.injection.component.AppComponent
-import eu.kanade.tachiyomi.injection.component.DaggerAppComponent
-import eu.kanade.tachiyomi.injection.module.AppModule
+import android.content.res.Configuration
+import android.support.multidex.MultiDex
+import com.evernote.android.job.JobManager
+import eu.kanade.tachiyomi.data.backup.BackupCreatorJob
+import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
+import eu.kanade.tachiyomi.data.updater.UpdateCheckerJob
+import eu.kanade.tachiyomi.util.LocaleHelper
 import org.acra.ACRA
 import org.acra.annotation.ReportsCrashes
 import timber.log.Timber
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.InjektScope
+import uy.kohesive.injekt.registry.default.DefaultRegistrar

@ReportsCrashes(
        formUri = "http://tachiyomi.kanade.eu/crash_report",
        reportType = org.acra.sender.HttpSender.Type.JSON,
        httpMethod = org.acra.sender.HttpSender.Method.PUT,
        buildConfigClass = BuildConfig::class,
-        excludeMatchingSharedPreferencesKeys = arrayOf(".*username.*", ".*password.*")
+        excludeMatchingSharedPreferencesKeys = arrayOf(".*username.*", ".*password.*", ".*token.*")
 )
 open class App : Application() {

-    lateinit var component: AppComponent
-        private set
-
-    lateinit var componentReflection: ComponentReflectionInjector<AppComponent>
-        private set
-
-    var appTheme = 0
-
    override fun onCreate() {
        super.onCreate()
+        Injekt = InjektScope(DefaultRegistrar())
+        Injekt.importModule(AppModule(this))
+
        if (BuildConfig.DEBUG) Timber.plant(Timber.DebugTree())

-        component = prepareAppComponent().build()
-
-        componentReflection = ComponentReflectionInjector(AppComponent::class.java, component)
-
-        setupTheme()
        setupAcra()
+        setupJobManager()
+
+        LocaleHelper.updateConfiguration(this, resources.configuration)
    }

-    private fun setupTheme() {
-        appTheme = PreferencesHelper.getTheme(this)
+    override fun attachBaseContext(base: Context) {
+        super.attachBaseContext(base)
+        if (BuildConfig.DEBUG) {
+            MultiDex.install(this)
+        }
    }

-    protected open fun prepareAppComponent(): DaggerAppComponent.Builder {
-        return DaggerAppComponent.builder()
-                .appModule(AppModule(this))
+    override fun onConfigurationChanged(newConfig: Configuration) {
+        super.onConfigurationChanged(newConfig)
+        LocaleHelper.updateConfiguration(this, newConfig, true)
    }

    protected open fun setupAcra() {
        ACRA.init(this)
    }

-    companion object {
-        @JvmStatic
-        fun get(context: Context): App {
-            return context.applicationContext as App
+    protected open fun setupJobManager() {
+        JobManager.create(this).addJobCreator { tag ->
+            when (tag) {
+                LibraryUpdateJob.TAG -> LibraryUpdateJob()
+                UpdateCheckerJob.TAG -> UpdateCheckerJob()
+                BackupCreatorJob.TAG -> BackupCreatorJob()
+                else -> null
+            }
        }
    }
+
 }
--- a/app/src/main/java/eu/kanade/tachiyomi/AppModule.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/AppModule.kt
@ -0,0 +1,41 @@
+package eu.kanade.tachiyomi
+
+import android.app.Application
+import com.google.gson.Gson
+import eu.kanade.tachiyomi.data.cache.ChapterCache
+import eu.kanade.tachiyomi.data.cache.CoverCache
+import eu.kanade.tachiyomi.data.database.DatabaseHelper
+import eu.kanade.tachiyomi.data.download.DownloadManager
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.track.TrackManager
+import eu.kanade.tachiyomi.network.NetworkHelper
+import eu.kanade.tachiyomi.source.SourceManager
+import uy.kohesive.injekt.api.InjektModule
+import uy.kohesive.injekt.api.InjektRegistrar
+import uy.kohesive.injekt.api.addSingletonFactory
+
+class AppModule(val app: Application) : InjektModule {
+
+    override fun InjektRegistrar.registerInjectables() {
+
+            addSingletonFactory { PreferencesHelper(app) }
+
+            addSingletonFactory { DatabaseHelper(app) }
+
+            addSingletonFactory { ChapterCache(app) }
+
+            addSingletonFactory { CoverCache(app) }
+
+            addSingletonFactory { NetworkHelper(app) }
+
+            addSingletonFactory { SourceManager(app) }
+
+            addSingletonFactory { DownloadManager(app) }
+
+            addSingletonFactory { TrackManager(app) }
+
+            addSingletonFactory { Gson() }
+
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/Constants.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/Constants.kt
@ -0,0 +1,10 @@
+package eu.kanade.tachiyomi
+
+object Constants {
+    const val NOTIFICATION_LIBRARY_PROGRESS_ID = 1
+    const val NOTIFICATION_LIBRARY_RESULT_ID = 2
+    const val NOTIFICATION_UPDATER_ID = 3
+    const val NOTIFICATION_DOWNLOAD_CHAPTER_ID = 4
+    const val NOTIFICATION_DOWNLOAD_CHAPTER_ERROR_ID = 5
+    const val NOTIFICATION_DOWNLOAD_IMAGE_ID = 6
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/Migrations.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/Migrations.kt
@ -0,0 +1,53 @@
+package eu.kanade.tachiyomi
+
+import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import eu.kanade.tachiyomi.data.updater.UpdateCheckerJob
+import java.io.File
+
+object Migrations {
+
+    /**
+     * Performs a migration when the application is updated.
+     *
+     * @param preferences Preferences of the application.
+     * @return true if a migration is performed, false otherwise.
+     */
+    fun upgrade(preferences: PreferencesHelper): Boolean {
+        val context = preferences.context
+        val oldVersion = preferences.lastVersionCode().getOrDefault()
+        if (oldVersion < BuildConfig.VERSION_CODE) {
+            preferences.lastVersionCode().set(BuildConfig.VERSION_CODE)
+
+            if (oldVersion == 0) return false
+
+            if (oldVersion < 14) {
+                // Restore jobs after upgrading to evernote's job scheduler.
+                if (BuildConfig.INCLUDE_UPDATER && preferences.automaticUpdates()) {
+                    UpdateCheckerJob.setupTask()
+                }
+                LibraryUpdateJob.setupTask()
+            }
+            if (oldVersion < 15) {
+                // Delete internal chapter cache dir.
+                File(context.cacheDir, "chapter_disk_cache").deleteRecursively()
+            }
+            if (oldVersion < 19) {
+                // Move covers to external files dir.
+                val oldDir = File(context.externalCacheDir, "cover_disk_cache")
+                if (oldDir.exists()) {
+                    val destDir = context.getExternalFilesDir("covers")
+                    if (destDir != null) {
+                        oldDir.listFiles().forEach {
+                            it.renameTo(File(destDir, it.name))
+                        }
+                    }
+                }
+            }
+            return true
+        }
+        return false
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupConst.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupConst.kt
@ -0,0 +1,23 @@
+package eu.kanade.tachiyomi.data.backup
+import eu.kanade.tachiyomi.BuildConfig.APPLICATION_ID as ID
+
+
+object BackupConst {
+
+    const val INTENT_FILTER = "SettingsBackupFragment"
+    const val ACTION_BACKUP_COMPLETED_DIALOG = "$ID.$INTENT_FILTER.ACTION_BACKUP_COMPLETED_DIALOG"
+    const val ACTION_SET_PROGRESS_DIALOG = "$ID.$INTENT_FILTER.ACTION_SET_PROGRESS_DIALOG"
+    const val ACTION_ERROR_BACKUP_DIALOG = "$ID.$INTENT_FILTER.ACTION_ERROR_BACKUP_DIALOG"
+    const val ACTION_ERROR_RESTORE_DIALOG = "$ID.$INTENT_FILTER.ACTION_ERROR_RESTORE_DIALOG"
+    const val ACTION_RESTORE_COMPLETED_DIALOG = "$ID.$INTENT_FILTER.ACTION_RESTORE_COMPLETED_DIALOG"
+    const val ACTION = "$ID.$INTENT_FILTER.ACTION"
+    const val EXTRA_PROGRESS = "$ID.$INTENT_FILTER.EXTRA_PROGRESS"
+    const val EXTRA_AMOUNT = "$ID.$INTENT_FILTER.EXTRA_AMOUNT"
+    const val EXTRA_ERRORS = "$ID.$INTENT_FILTER.EXTRA_ERRORS"
+    const val EXTRA_CONTENT = "$ID.$INTENT_FILTER.EXTRA_CONTENT"
+    const val EXTRA_ERROR_MESSAGE = "$ID.$INTENT_FILTER.EXTRA_ERROR_MESSAGE"
+    const val EXTRA_URI = "$ID.$INTENT_FILTER.EXTRA_URI"
+    const val EXTRA_TIME = "$ID.$INTENT_FILTER.EXTRA_TIME"
+    const val EXTRA_ERROR_FILE_PATH = "$ID.$INTENT_FILTER.EXTRA_ERROR_FILE_PATH"
+    const val EXTRA_ERROR_FILE = "$ID.$INTENT_FILTER.EXTRA_ERROR_FILE"
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupCreateService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupCreateService.kt
@ -0,0 +1,164 @@
+package eu.kanade.tachiyomi.data.backup
+
+import android.app.IntentService
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import com.github.salomonbrys.kotson.set
+import com.google.gson.JsonArray
+import com.google.gson.JsonObject
+import com.hippo.unifile.UniFile
+import eu.kanade.tachiyomi.data.backup.models.Backup
+import eu.kanade.tachiyomi.data.backup.models.Backup.CATEGORIES
+import eu.kanade.tachiyomi.data.backup.models.Backup.MANGAS
+import eu.kanade.tachiyomi.data.backup.models.Backup.VERSION
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.util.sendLocalBroadcast
+import timber.log.Timber
+import eu.kanade.tachiyomi.BuildConfig.APPLICATION_ID as ID
+
+/**
+ * [IntentService] used to backup [Manga] information to [JsonArray]
+ */
+class BackupCreateService : IntentService(NAME) {
+
+    companion object {
+        // Name of class
+        private const val NAME = "BackupCreateService"
+
+        // Backup called from job
+        private const val EXTRA_IS_JOB = "$ID.$NAME.EXTRA_IS_JOB"
+        // Options for backup
+        private const val EXTRA_FLAGS = "$ID.$NAME.EXTRA_FLAGS"
+
+        // Filter options
+        internal const val BACKUP_CATEGORY = 0x1
+        internal const val BACKUP_CATEGORY_MASK = 0x1
+        internal const val BACKUP_CHAPTER = 0x2
+        internal const val BACKUP_CHAPTER_MASK = 0x2
+        internal const val BACKUP_HISTORY = 0x4
+        internal const val BACKUP_HISTORY_MASK = 0x4
+        internal const val BACKUP_TRACK = 0x8
+        internal const val BACKUP_TRACK_MASK = 0x8
+        internal const val BACKUP_ALL = 0xF
+
+        /**
+         * Make a backup from library
+         *
+         * @param context context of application
+         * @param path path of Uri
+         * @param flags determines what to backup
+         * @param isJob backup called from job
+         */
+        fun makeBackup(context: Context, uri: Uri, flags: Int, isJob: Boolean = false) {
+            val intent = Intent(context, BackupCreateService::class.java).apply {
+                putExtra(BackupConst.EXTRA_URI, uri)
+                putExtra(EXTRA_IS_JOB, isJob)
+                putExtra(EXTRA_FLAGS, flags)
+            }
+            context.startService(intent)
+        }
+
+    }
+
+    private val backupManager by lazy { BackupManager(this) }
+
+    override fun onHandleIntent(intent: Intent?) {
+        if (intent == null) return
+
+        // Get values
+        val uri = intent.getParcelableExtra<Uri>(BackupConst.EXTRA_URI)
+        val isJob = intent.getBooleanExtra(EXTRA_IS_JOB, false)
+        val flags = intent.getIntExtra(EXTRA_FLAGS, 0)
+        // Create backup
+        createBackupFromApp(uri, flags, isJob)
+    }
+
+    /**
+     * Create backup Json file from database
+     *
+     * @param uri path of Uri
+     * @param isJob backup called from job
+     */
+    fun createBackupFromApp(uri: Uri, flags: Int, isJob: Boolean) {
+        // Create root object
+        val root = JsonObject()
+
+        // Create information object
+        val information = JsonObject()
+
+        // Create manga array
+        val mangaEntries = JsonArray()
+
+        // Create category array
+        val categoryEntries = JsonArray()
+
+        // Add value's to root
+        root[VERSION] = Backup.CURRENT_VERSION
+        root[MANGAS] = mangaEntries
+        root[CATEGORIES] = categoryEntries
+
+        backupManager.databaseHelper.inTransaction {
+            // Get manga from database
+            val mangas = backupManager.getFavoriteManga()
+
+            // Backup library manga and its dependencies
+            mangas.forEach { manga ->
+                mangaEntries.add(backupManager.backupMangaObject(manga, flags))
+            }
+
+            // Backup categories
+            if ((flags and BACKUP_CATEGORY_MASK) == BACKUP_CATEGORY) {
+                backupManager.backupCategories(categoryEntries)
+            }
+        }
+
+        try {
+            // When BackupCreatorJob
+            if (isJob) {
+                // Get dir of file
+                val dir = UniFile.fromUri(this, uri)
+
+                // Delete older backups
+                val numberOfBackups = backupManager.numberOfBackups()
+                val backupRegex = Regex("""tachiyomi_\d+-\d+-\d+_\d+-\d+.json""")
+                dir.listFiles { _, filename -> backupRegex.matches(filename) }
+                        .orEmpty()
+                        .sortedByDescending { it.name }
+                        .drop(numberOfBackups - 1)
+                        .forEach { it.delete() }
+
+                // Create new file to place backup
+                val newFile = dir.createFile(Backup.getDefaultFilename())
+                        ?: throw Exception("Couldn't create backup file")
+
+                newFile.openOutputStream().bufferedWriter().use {
+                    backupManager.parser.toJson(root, it)
+                }
+            } else {
+                val file = UniFile.fromUri(this, uri)
+                        ?: throw Exception("Couldn't create backup file")
+                file.openOutputStream().bufferedWriter().use {
+                    backupManager.parser.toJson(root, it)
+                }
+
+                // Show completed dialog
+                val intent = Intent(BackupConst.INTENT_FILTER).apply {
+                    putExtra(BackupConst.ACTION, BackupConst.ACTION_BACKUP_COMPLETED_DIALOG)
+                    putExtra(BackupConst.EXTRA_URI, file.uri.toString())
+                }
+                sendLocalBroadcast(intent)
+            }
+        } catch (e: Exception) {
+            Timber.e(e)
+            if (!isJob) {
+                // Show error dialog
+                val intent = Intent(BackupConst.INTENT_FILTER).apply {
+                    putExtra(BackupConst.ACTION, BackupConst.ACTION_ERROR_BACKUP_DIALOG)
+                    putExtra(BackupConst.EXTRA_ERROR_MESSAGE, e.message)
+                }
+                sendLocalBroadcast(intent)
+            }
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupCreatorJob.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupCreatorJob.kt
@ -0,0 +1,43 @@
+package eu.kanade.tachiyomi.data.backup
+
+import android.net.Uri
+import com.evernote.android.job.Job
+import com.evernote.android.job.JobManager
+import com.evernote.android.job.JobRequest
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.io.File
+
+class BackupCreatorJob : Job() {
+
+    override fun onRunJob(params: Params): Result {
+        val preferences = Injekt.get<PreferencesHelper>()
+        val uri = Uri.fromFile(File(preferences.backupsDirectory().getOrDefault()))
+        val flags = BackupCreateService.BACKUP_ALL
+        BackupCreateService.makeBackup(context, uri, flags, true)
+        return Result.SUCCESS
+    }
+
+    companion object {
+        const val TAG = "BackupCreator"
+
+        fun setupTask(prefInterval: Int? = null) {
+            val preferences = Injekt.get<PreferencesHelper>()
+            val interval = prefInterval ?: preferences.backupInterval().getOrDefault()
+            if (interval > 0) {
+                JobRequest.Builder(TAG)
+                        .setPeriodic(interval * 60 * 60 * 1000L, 10 * 60 * 1000)
+                        .setPersisted(true)
+                        .setUpdateCurrent(true)
+                        .build()
+                        .schedule()
+            }
+        }
+
+        fun cancelTask() {
+            JobManager.instance().cancelAllForTag(TAG)
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt
@ -1,201 +1,212 @@
 package eu.kanade.tachiyomi.data.backup

+import android.content.Context
+import com.github.salomonbrys.kotson.*
 import com.google.gson.*
-import com.google.gson.reflect.TypeToken
-import com.google.gson.stream.JsonReader
-import eu.kanade.tachiyomi.data.backup.serializer.IdExclusion
-import eu.kanade.tachiyomi.data.backup.serializer.IntegerSerializer
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_CATEGORY
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_CATEGORY_MASK
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_CHAPTER
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_CHAPTER_MASK
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_HISTORY
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_HISTORY_MASK
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_TRACK
+import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_TRACK_MASK
+import eu.kanade.tachiyomi.data.backup.models.Backup.CATEGORIES
+import eu.kanade.tachiyomi.data.backup.models.Backup.CHAPTERS
+import eu.kanade.tachiyomi.data.backup.models.Backup.CURRENT_VERSION
+import eu.kanade.tachiyomi.data.backup.models.Backup.HISTORY
+import eu.kanade.tachiyomi.data.backup.models.Backup.MANGA
+import eu.kanade.tachiyomi.data.backup.models.Backup.TRACK
+import eu.kanade.tachiyomi.data.backup.models.DHistory
+import eu.kanade.tachiyomi.data.backup.serializer.*
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.*
-import java.io.*
-import java.lang.reflect.Type
-import java.util.*
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import eu.kanade.tachiyomi.source.Source
+import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.util.syncChaptersWithSource
+import rx.Observable
+import uy.kohesive.injekt.injectLazy

-/**
- * This class provides the necessary methods to create and restore backups for the data of the
- * application. The backup follows a JSON structure, with the following scheme:
- *
- * {
- *     "mangas": [
- *         {
- *             "manga": {"id": 1, ...},
- *             "chapters": [{"id": 1, ...}, {...}],
- *             "sync": [{"id": 1, ...}, {...}],
- *             "categories": ["cat1", "cat2", ...]
- *         },
- *         { ... }
- *     ],
- *     "categories": [
- *         {"id": 1, ...},
- *         {"id": 2, ...}
- *     ]
- * }
- *
- * @param db the database helper.
- */
-class BackupManager(private val db: DatabaseHelper) {
-
-    private val MANGA = "manga"
-    private val MANGAS = "mangas"
-    private val CHAPTERS = "chapters"
-    private val MANGA_SYNC = "sync"
-    private val CATEGORIES = "categories"
-
-    @Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
-    private val gson = GsonBuilder()
-            .registerTypeAdapter(Integer::class.java, IntegerSerializer())
-            .setExclusionStrategies(IdExclusion())
-            .create()
+class BackupManager(val context: Context, version: Int = CURRENT_VERSION) {

    /**
-     * Backups the data of the application to a file.
-     *
-     * @param file the file where the backup will be saved.
-     * @throws IOException if there's any IO error.
+     * Database.
     */
-    @Throws(IOException::class)
-    fun backupToFile(file: File) {
-        val root = backupToJson()
+    internal val databaseHelper: DatabaseHelper by injectLazy()

-        FileWriter(file).use {
-            gson.toJson(root, it)
+    /**
+     * Source manager.
+     */
+    internal val sourceManager: SourceManager by injectLazy()
+
+    /**
+     * Version of parser
+     */
+    var version: Int = version
+        private set
+
+    /**
+     * Json Parser
+     */
+    var parser: Gson = initParser()
+
+    /**
+     * Preferences
+     */
+    private val preferences: PreferencesHelper by injectLazy()
+
+    /**
+     * Set version of parser
+     *
+     * @param version version of parser
+     */
+    internal fun setVersion(version: Int) {
+        this.version = version
+        parser = initParser()
+    }
+
+    private fun initParser(): Gson {
+        return when (version) {
+            1 -> GsonBuilder().create()
+            2 -> GsonBuilder()
+                    .registerTypeAdapter<MangaImpl>(MangaTypeAdapter.build())
+                    .registerTypeHierarchyAdapter<ChapterImpl>(ChapterTypeAdapter.build())
+                    .registerTypeAdapter<CategoryImpl>(CategoryTypeAdapter.build())
+                    .registerTypeAdapter<DHistory>(HistoryTypeAdapter.build())
+                    .registerTypeHierarchyAdapter<TrackImpl>(TrackTypeAdapter.build())
+                    .create()
+            else -> throw Exception("Json version unknown")
        }
    }

    /**
-     * Creates a JSON object containing the backup of the app's data.
+     * Backup the categories of library
     *
-     * @return the backup as a JSON object.
+     * @param root root of categories json
     */
-    fun backupToJson(): JsonObject {
-        val root = JsonObject()
-
-        // Backup library mangas and its dependencies
-        val mangaEntries = JsonArray()
-        root.add(MANGAS, mangaEntries)
-        for (manga in db.getFavoriteMangas().executeAsBlocking()) {
-            mangaEntries.add(backupManga(manga))
-        }
-
-        // Backup categories
-        val categoryEntries = JsonArray()
-        root.add(CATEGORIES, categoryEntries)
-        for (category in db.getCategories().executeAsBlocking()) {
-            categoryEntries.add(backupCategory(category))
-        }
-
-        return root
+    internal fun backupCategories(root: JsonArray) {
+        val categories = databaseHelper.getCategories().executeAsBlocking()
+        categories.forEach { root.add(parser.toJsonTree(it)) }
    }

    /**
-     * Backups a manga and its related data (chapters, categories this manga is in, sync...).
+     * Convert a manga to Json
     *
-     * @param manga the manga to backup.
-     * @return a JSON object containing all the data of the manga.
+     * @param manga manga that gets converted
+     * @return [JsonElement] containing manga information
     */
-    private fun backupManga(manga: Manga): JsonObject {
+    internal fun backupMangaObject(manga: Manga, options: Int): JsonElement {
        // Entry for this manga
        val entry = JsonObject()

        // Backup manga fields
-        entry.add(MANGA, gson.toJsonTree(manga))
+        entry[MANGA] = parser.toJsonTree(manga)

-        // Backup all the chapters
-        val chapters = db.getChapters(manga).executeAsBlocking()
-        if (!chapters.isEmpty()) {
-            entry.add(CHAPTERS, gson.toJsonTree(chapters))
-        }
-
-        // Backup manga sync
-        val mangaSync = db.getMangasSync(manga).executeAsBlocking()
-        if (!mangaSync.isEmpty()) {
-            entry.add(MANGA_SYNC, gson.toJsonTree(mangaSync))
-        }
-
-        // Backup categories for this manga
-        val categoriesForManga = db.getCategoriesForManga(manga).executeAsBlocking()
-        if (!categoriesForManga.isEmpty()) {
-            val categoriesNames = ArrayList<String>()
-            for (category in categoriesForManga) {
-                categoriesNames.add(category.name)
+        // Check if user wants chapter information in backup
+        if (options and BACKUP_CHAPTER_MASK == BACKUP_CHAPTER) {
+            // Backup all the chapters
+            val chapters = databaseHelper.getChapters(manga).executeAsBlocking()
+            if (!chapters.isEmpty()) {
+                val chaptersJson = parser.toJsonTree(chapters)
+                if (chaptersJson.asJsonArray.size() > 0) {
+                    entry[CHAPTERS] = chaptersJson
+                }
+            }
+        }
+
+        // Check if user wants category information in backup
+        if (options and BACKUP_CATEGORY_MASK == BACKUP_CATEGORY) {
+            // Backup categories for this manga
+            val categoriesForManga = databaseHelper.getCategoriesForManga(manga).executeAsBlocking()
+            if (!categoriesForManga.isEmpty()) {
+                val categoriesNames = categoriesForManga.map { it.name }
+                entry[CATEGORIES] = parser.toJsonTree(categoriesNames)
+            }
+        }
+
+        // Check if user wants track information in backup
+        if (options and BACKUP_TRACK_MASK == BACKUP_TRACK) {
+            val tracks = databaseHelper.getTracks(manga).executeAsBlocking()
+            if (!tracks.isEmpty()) {
+                entry[TRACK] = parser.toJsonTree(tracks)
+            }
+        }
+
+        // Check if user wants history information in backup
+        if (options and BACKUP_HISTORY_MASK == BACKUP_HISTORY) {
+            val historyForManga = databaseHelper.getHistoryByMangaId(manga.id!!).executeAsBlocking()
+            if (!historyForManga.isEmpty()) {
+                val historyData = historyForManga.mapNotNull { history ->
+                    val url = databaseHelper.getChapter(history.chapter_id).executeAsBlocking()?.url
+                    url?.let { DHistory(url, history.last_read) }
+                }
+                val historyJson = parser.toJsonTree(historyData)
+                if (historyJson.asJsonArray.size() > 0) {
+                    entry[HISTORY] = historyJson
+                }
            }
-            entry.add(CATEGORIES, gson.toJsonTree(categoriesNames))
        }

        return entry
    }

-    /**
-     * Backups a category.
-     *
-     * @param category the category to backup.
-     * @return a JSON object containing the data of the category.
-     */
-    private fun backupCategory(category: Category): JsonElement {
-        return gson.toJsonTree(category)
+    fun restoreMangaNoFetch(manga: Manga, dbManga: Manga) {
+        manga.id = dbManga.id
+        manga.copyFrom(dbManga)
+        manga.favorite = true
+        insertManga(manga)
    }

    /**
-     * Restores a backup from a file.
+     * [Observable] that fetches manga information
     *
-     * @param file the file containing the backup.
-     * @throws IOException if there's any IO error.
+     * @param source source of manga
+     * @param manga manga that needs updating
+     * @return [Observable] that contains manga
     */
-    @Throws(IOException::class)
-    fun restoreFromFile(file: File) {
-        JsonReader(FileReader(file)).use {
-            val root = JsonParser().parse(it).asJsonObject
-            restoreFromJson(root)
-        }
+    fun restoreMangaFetchObservable(source: Source, manga: Manga): Observable<Manga> {
+        return source.fetchMangaDetails(manga)
+                .map { networkManga ->
+                    manga.copyFrom(networkManga)
+                    manga.favorite = true
+                    manga.initialized = true
+                    manga.id = insertManga(manga)
+                    manga
+                }
    }

    /**
-     * Restores a backup from an input stream.
+     * [Observable] that fetches chapter information
     *
-     * @param stream the stream containing the backup.
-     * @throws IOException if there's any IO error.
+     * @param source source of manga
+     * @param manga manga that needs updating
+     * @return [Observable] that contains manga
     */
-    @Throws(IOException::class)
-    fun restoreFromStream(stream: InputStream) {
-        JsonReader(InputStreamReader(stream)).use {
-            val root = JsonParser().parse(it).asJsonObject
-            restoreFromJson(root)
-        }
+    fun restoreChapterFetchObservable(source: Source, manga: Manga, chapters: List<Chapter>): Observable<Pair<List<Chapter>, List<Chapter>>> {
+        return source.fetchChapterList(manga)
+                .map { syncChaptersWithSource(databaseHelper, it, manga, source) }
+                .doOnNext {
+                    if (it.first.isNotEmpty()) {
+                        chapters.forEach { it.manga_id = manga.id }
+                        insertChapters(chapters)
+                    }
+                }
    }

    /**
-     * Restores a backup from a JSON object. Everything executes in a single transaction so that
-     * nothing is modified if there's an error.
+     * Restore the categories from Json
     *
-     * @param root the root of the JSON.
+     * @param jsonCategories array containing categories
     */
-    fun restoreFromJson(root: JsonObject) {
-        db.inTransaction {
-            // Restore categories
-            root.get(CATEGORIES)?.let {
-                restoreCategories(it.asJsonArray)
-            }
-
-            // Restore mangas
-            root.get(MANGAS)?.let {
-                restoreMangas(it.asJsonArray)
-            }
-        }
-    }
-
-    /**
-     * Restores the categories.
-     *
-     * @param jsonCategories the categories of the json.
-     */
-    private fun restoreCategories(jsonCategories: JsonArray) {
+    internal fun restoreCategories(jsonCategories: JsonArray) {
        // Get categories from file and from db
-        val dbCategories = db.getCategories().executeAsBlocking()
-        val backupCategories = getArrayOrEmpty<Category>(jsonCategories,
-                object : TypeToken<List<Category>>() {}.type)
+        val dbCategories = databaseHelper.getCategories().executeAsBlocking()
+        val backupCategories = parser.fromJson<List<CategoryImpl>>(jsonCategories)

        // Iterate over them
-        for (category in backupCategories) {
+        backupCategories.forEach { category ->
            // Used to know if the category is already in the db
            var found = false
            for (dbCategory in dbCategories) {
@ -212,106 +223,20 @@ class BackupManager(private val db: DatabaseHelper) {
            if (!found) {
                // Let the db assign the id
                category.id = null
-                val result = db.insertCategory(category).executeAsBlocking()
+                val result = databaseHelper.insertCategory(category).executeAsBlocking()
                category.id = result.insertedId()?.toInt()
            }
        }
    }

-    /**
-     * Restores all the mangas and its related data.
-     *
-     * @param jsonMangas the mangas and its related data (chapters, sync, categories) from the json.
-     */
-    private fun restoreMangas(jsonMangas: JsonArray) {
-        val chapterToken = object : TypeToken<List<Chapter>>() {}.type
-        val mangaSyncToken = object : TypeToken<List<MangaSync>>() {}.type
-        val categoriesNamesToken = object : TypeToken<List<String>>() {}.type
-
-        for (backupManga in jsonMangas) {
-            // Map every entry to objects
-            val element = backupManga.asJsonObject
-            val manga = gson.fromJson(element.get(MANGA), Manga::class.java)
-            val chapters = getArrayOrEmpty<Chapter>(element.get(CHAPTERS), chapterToken)
-            val sync = getArrayOrEmpty<MangaSync>(element.get(MANGA_SYNC), mangaSyncToken)
-            val categories = getArrayOrEmpty<String>(element.get(CATEGORIES), categoriesNamesToken)
-
-            // Restore everything related to this manga
-            restoreManga(manga)
-            restoreChaptersForManga(manga, chapters)
-            restoreSyncForManga(manga, sync)
-            restoreCategoriesForManga(manga, categories)
-        }
-    }
-
-    /**
-     * Restores a manga.
-     *
-     * @param manga the manga to restore.
-     */
-    private fun restoreManga(manga: Manga) {
-        // Try to find existing manga in db
-        val dbManga = db.getManga(manga.url, manga.source).executeAsBlocking()
-        if (dbManga == null) {
-            // Let the db assign the id
-            manga.id = null
-            val result = db.insertManga(manga).executeAsBlocking()
-            manga.id = result.insertedId()
-        } else {
-            // If it exists already, we copy only the values related to the source from the db
-            // (they can be up to date). Local values (flags) are kept from the backup.
-            manga.id = dbManga.id
-            manga.copyFrom(dbManga)
-            manga.favorite = true
-            db.insertManga(manga).executeAsBlocking()
-        }
-    }
-
-    /**
-     * Restores the chapters of a manga.
-     *
-     * @param manga the manga whose chapters have to be restored.
-     * @param chapters the chapters to restore.
-     */
-    private fun restoreChaptersForManga(manga: Manga, chapters: List<Chapter>) {
-        // Fix foreign keys with the current manga id
-        for (chapter in chapters) {
-            chapter.manga_id = manga.id
-        }
-
-        val dbChapters = db.getChapters(manga).executeAsBlocking()
-        val chaptersToUpdate = ArrayList<Chapter>()
-        for (backupChapter in chapters) {
-            // Try to find existing chapter in db
-            val pos = dbChapters.indexOf(backupChapter)
-            if (pos != -1) {
-                // The chapter is already in the db, only update its fields
-                val dbChapter = dbChapters[pos]
-                // If one of them was read, the chapter will be marked as read
-                dbChapter.read = backupChapter.read || dbChapter.read
-                dbChapter.last_page_read = Math.max(backupChapter.last_page_read, dbChapter.last_page_read)
-                chaptersToUpdate.add(dbChapter)
-            } else {
-                // Insert new chapter. Let the db assign the id
-                backupChapter.id = null
-                chaptersToUpdate.add(backupChapter)
-            }
-        }
-
-        // Update database
-        if (!chaptersToUpdate.isEmpty()) {
-            db.insertChapters(chaptersToUpdate).executeAsBlocking()
-        }
-    }
-
    /**
     * Restores the categories a manga is in.
     *
     * @param manga the manga whose categories have to be restored.
     * @param categories the categories to restore.
     */
-    private fun restoreCategoriesForManga(manga: Manga, categories: List<String>) {
-        val dbCategories = db.getCategories().executeAsBlocking()
+    internal fun restoreCategoriesForManga(manga: Manga, categories: List<String>) {
+        val dbCategories = databaseHelper.getCategories().executeAsBlocking()
        val mangaCategoriesToUpdate = ArrayList<MangaCategory>()
        for (backupCategoryStr in categories) {
            for (dbCategory in dbCategories) {
@ -326,56 +251,151 @@ class BackupManager(private val db: DatabaseHelper) {
        if (!mangaCategoriesToUpdate.isEmpty()) {
            val mangaAsList = ArrayList<Manga>()
            mangaAsList.add(manga)
-            db.deleteOldMangasCategories(mangaAsList).executeAsBlocking()
-            db.insertMangasCategories(mangaCategoriesToUpdate).executeAsBlocking()
+            databaseHelper.deleteOldMangasCategories(mangaAsList).executeAsBlocking()
+            databaseHelper.insertMangasCategories(mangaCategoriesToUpdate).executeAsBlocking()
        }
    }

+    /**
+     * Restore history from Json
+     *
+     * @param history list containing history to be restored
+     */
+    internal fun restoreHistoryForManga(history: List<DHistory>) {
+        // List containing history to be updated
+        val historyToBeUpdated = ArrayList<History>()
+        for ((url, lastRead) in history) {
+            val dbHistory = databaseHelper.getHistoryByChapterUrl(url).executeAsBlocking()
+            // Check if history already in database and update
+            if (dbHistory != null) {
+                dbHistory.apply {
+                    last_read = Math.max(lastRead, dbHistory.last_read)
+                }
+                historyToBeUpdated.add(dbHistory)
+            } else {
+                // If not in database create
+                databaseHelper.getChapter(url).executeAsBlocking()?.let {
+                    val historyToAdd = History.create(it).apply {
+                        last_read = lastRead
+                    }
+                    historyToBeUpdated.add(historyToAdd)
+                }
+            }
+        }
+        databaseHelper.updateHistoryLastRead(historyToBeUpdated).executeAsBlocking()
+    }
+
    /**
     * Restores the sync of a manga.
     *
     * @param manga the manga whose sync have to be restored.
-     * @param sync the sync to restore.
+     * @param tracks the track list to restore.
     */
-    private fun restoreSyncForManga(manga: Manga, sync: List<MangaSync>) {
+    internal fun restoreTrackForManga(manga: Manga, tracks: List<Track>) {
        // Fix foreign keys with the current manga id
-        for (mangaSync in sync) {
-            mangaSync.manga_id = manga.id
-        }
+        tracks.map { it.manga_id = manga.id!! }

-        val dbSyncs = db.getMangasSync(manga).executeAsBlocking()
-        val syncToUpdate = ArrayList<MangaSync>()
-        for (backupSync in sync) {
-            // Try to find existing chapter in db
-            val pos = dbSyncs.indexOf(backupSync)
-            if (pos != -1) {
-                // The sync is already in the db, only update its fields
-                val dbSync = dbSyncs[pos]
-                // Mark the max chapter as read and nothing else
-                dbSync.last_chapter_read = Math.max(backupSync.last_chapter_read, dbSync.last_chapter_read)
-                syncToUpdate.add(dbSync)
-            } else {
+        // Get tracks from database
+        val dbTracks = databaseHelper.getTracks(manga).executeAsBlocking()
+        val trackToUpdate = ArrayList<Track>()
+
+        for (track in tracks) {
+            var isInDatabase = false
+            for (dbTrack in dbTracks) {
+                if (track.sync_id == dbTrack.sync_id) {
+                    // The sync is already in the db, only update its fields
+                    if (track.remote_id != dbTrack.remote_id) {
+                        dbTrack.remote_id = track.remote_id
+                    }
+                    dbTrack.last_chapter_read = Math.max(dbTrack.last_chapter_read, track.last_chapter_read)
+                    isInDatabase = true
+                    trackToUpdate.add(dbTrack)
+                    break
+                }
+            }
+            if (!isInDatabase) {
                // Insert new sync. Let the db assign the id
-                backupSync.id = null
-                syncToUpdate.add(backupSync)
+                track.id = null
+                trackToUpdate.add(track)
            }
        }
-
        // Update database
-        if (!syncToUpdate.isEmpty()) {
-            db.insertMangasSync(syncToUpdate).executeAsBlocking()
+        if (!trackToUpdate.isEmpty()) {
+            databaseHelper.insertTracks(trackToUpdate).executeAsBlocking()
        }
    }

    /**
-     * Returns a list of items from a json element, or an empty list if the element is null.
+     * Restore the chapters for manga if chapters already in database
     *
-     * @param element the json to be mapped to a list of items.
-     * @param type the gson mapping to restore the list.
-     * @return a list of items.
+     * @param manga manga of chapters
+     * @param chapters list containing chapters that get restored
+     * @return boolean answering if chapter fetch is not needed
     */
-    private fun <T> getArrayOrEmpty(element: JsonElement?, type: Type): List<T> {
-        return gson.fromJson<List<T>>(element, type) ?: ArrayList<T>()
+    internal fun restoreChaptersForManga(manga: Manga, chapters: List<Chapter>): Boolean {
+        val dbChapters = databaseHelper.getChapters(manga).executeAsBlocking()
+
+        // Return if fetch is needed
+        if (dbChapters.isEmpty() || dbChapters.size < chapters.size)
+            return false
+
+        for (chapter in chapters) {
+            val pos = dbChapters.indexOf(chapter)
+            if (pos != -1) {
+                val dbChapter = dbChapters[pos]
+                chapter.id = dbChapter.id
+                chapter.copyFrom(dbChapter)
+                break
+            }
+        }
+        // Filter the chapters that couldn't be found.
+        chapters.filter { it.id != null }
+        chapters.map { it.manga_id = manga.id }
+
+        insertChapters(chapters)
+        return true
    }

+    /**
+     * Returns manga
+     *
+     * @return [Manga], null if not found
+     */
+    internal fun getMangaFromDatabase(manga: Manga): Manga? {
+        return databaseHelper.getManga(manga.url, manga.source).executeAsBlocking()
+    }
+
+    /**
+     * Returns list containing manga from library
+     *
+     * @return [Manga] from library
+     */
+    internal fun getFavoriteManga(): List<Manga> {
+        return databaseHelper.getFavoriteMangas().executeAsBlocking()
+    }
+
+    /**
+     * Inserts manga and returns id
+     *
+     * @return id of [Manga], null if not found
+     */
+    internal fun insertManga(manga: Manga): Long? {
+        return databaseHelper.insertManga(manga).executeAsBlocking().insertedId()
+    }
+
+    /**
+     * Inserts list of chapters
+     */
+    internal fun insertChapters(chapters: List<Chapter>) {
+        databaseHelper.updateChaptersBackup(chapters).executeAsBlocking()
+    }
+
+    /**
+     * Return number of backups.
+     *
+     * @return number of backups selected by user
+     */
+    fun numberOfBackups(): Int {
+        return preferences.numberOfBackups().getOrDefault()
+    }
 }
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreService.kt
@ -0,0 +1,406 @@
+package eu.kanade.tachiyomi.data.backup
+
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.IBinder
+import android.os.PowerManager
+import com.github.salomonbrys.kotson.fromJson
+import com.google.gson.JsonArray
+import com.google.gson.JsonParser
+import com.google.gson.stream.JsonReader
+import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.backup.models.Backup.CATEGORIES
+import eu.kanade.tachiyomi.data.backup.models.Backup.CHAPTERS
+import eu.kanade.tachiyomi.data.backup.models.Backup.HISTORY
+import eu.kanade.tachiyomi.data.backup.models.Backup.MANGA
+import eu.kanade.tachiyomi.data.backup.models.Backup.MANGAS
+import eu.kanade.tachiyomi.data.backup.models.Backup.TRACK
+import eu.kanade.tachiyomi.data.backup.models.Backup.VERSION
+import eu.kanade.tachiyomi.data.backup.models.DHistory
+import eu.kanade.tachiyomi.data.database.DatabaseHelper
+import eu.kanade.tachiyomi.data.database.models.*
+import eu.kanade.tachiyomi.source.Source
+import eu.kanade.tachiyomi.util.chop
+import eu.kanade.tachiyomi.util.isServiceRunning
+import eu.kanade.tachiyomi.util.sendLocalBroadcast
+import rx.Observable
+import rx.Subscription
+import rx.schedulers.Schedulers
+import timber.log.Timber
+import uy.kohesive.injekt.injectLazy
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.*
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+
+/**
+ * Restores backup from json file
+ */
+class BackupRestoreService : Service() {
+
+    companion object {
+
+        /**
+         * Returns the status of the service.
+         *
+         * @param context the application context.
+         * @return true if the service is running, false otherwise.
+         */
+        fun isRunning(context: Context): Boolean {
+            return context.isServiceRunning(BackupRestoreService::class.java)
+        }
+
+        /**
+         * Starts a service to restore a backup from Json
+         *
+         * @param context context of application
+         * @param uri path of Uri
+         */
+        fun start(context: Context, uri: Uri) {
+            if (!isRunning(context)) {
+                val intent = Intent(context, BackupRestoreService::class.java).apply {
+                    putExtra(BackupConst.EXTRA_URI, uri)
+                }
+                context.startService(intent)
+            }
+        }
+
+        /**
+         * Stops the service.
+         *
+         * @param context the application context.
+         */
+        fun stop(context: Context) {
+            context.stopService(Intent(context, BackupRestoreService::class.java))
+        }
+    }
+
+    /**
+     * Wake lock that will be held until the service is destroyed.
+     */
+    private lateinit var wakeLock: PowerManager.WakeLock
+
+    /**
+     * Subscription where the update is done.
+     */
+    private var subscription: Subscription? = null
+
+    /**
+     * The progress of a backup restore
+     */
+    private var restoreProgress = 0
+
+    /**
+     * Amount of manga in Json file (needed for restore)
+     */
+    private var restoreAmount = 0
+
+    /**
+     * List containing errors
+     */
+    private val errors = mutableListOf<Pair<Date, String>>()
+
+    /**
+     * Backup manager
+     */
+    private lateinit var backupManager: BackupManager
+
+    /**
+     * Database
+     */
+    private val db: DatabaseHelper by injectLazy()
+
+    lateinit var executor: ExecutorService
+
+    /**
+     * Method called when the service is created. It injects dependencies and acquire the wake lock.
+     */
+    override fun onCreate() {
+        super.onCreate()
+        wakeLock = (getSystemService(Context.POWER_SERVICE) as PowerManager).newWakeLock(
+                PowerManager.PARTIAL_WAKE_LOCK, "BackupRestoreService:WakeLock")
+        wakeLock.acquire()
+        executor = Executors.newSingleThreadExecutor()
+    }
+
+    /**
+     * Method called when the service is destroyed. It destroys the running subscription and
+     * releases the wake lock.
+     */
+    override fun onDestroy() {
+        subscription?.unsubscribe()
+        executor.shutdown() // must be called after unsubscribe
+        if (wakeLock.isHeld) {
+            wakeLock.release()
+        }
+        super.onDestroy()
+    }
+
+    /**
+     * This method needs to be implemented, but it's not used/needed.
+     */
+    override fun onBind(intent: Intent): IBinder? {
+        return null
+    }
+
+    /**
+     * Method called when the service receives an intent.
+     *
+     * @param intent the start intent from.
+     * @param flags the flags of the command.
+     * @param startId the start id of this command.
+     * @return the start value of the command.
+     */
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (intent == null) return Service.START_NOT_STICKY
+
+        val uri = intent.getParcelableExtra<Uri>(BackupConst.EXTRA_URI)
+
+        // Unsubscribe from any previous subscription if needed.
+        subscription?.unsubscribe()
+
+        subscription = Observable.using(
+                { db.lowLevel().beginTransaction() },
+                { getRestoreObservable(uri).doOnNext{ db.lowLevel().setTransactionSuccessful() } },
+                { executor.execute { db.lowLevel().endTransaction() } })
+                .doAfterTerminate { stopSelf(startId) }
+                .subscribeOn(Schedulers.from(executor))
+                .subscribe()
+
+        return Service.START_NOT_STICKY
+    }
+
+    /**
+     * Returns an [Observable] containing restore process.
+     *
+     * @param uri restore file
+     * @return [Observable<Manga>]
+     */
+    private fun getRestoreObservable(uri: Uri): Observable<List<Manga>> {
+        val startTime = System.currentTimeMillis()
+
+        val reader = JsonReader(contentResolver.openInputStream(uri).bufferedReader())
+        val json = JsonParser().parse(reader).asJsonObject
+
+        // Get parser version
+        val version = json.get(VERSION)?.asInt ?: 1
+
+        // Initialize manager
+        backupManager = BackupManager(this, version)
+
+        val mangasJson = json.get(MANGAS).asJsonArray
+
+        restoreAmount = mangasJson.size() + 1 // +1 for categories
+        restoreProgress = 0
+        errors.clear()
+
+        // Restore categories
+        json.get(CATEGORIES)?.let {
+            backupManager.restoreCategories(it.asJsonArray)
+            restoreProgress += 1
+            showRestoreProgress(restoreProgress, restoreAmount, "Categories added", errors.size)
+        }
+
+        return Observable.from(mangasJson)
+                .concatMap {
+                    val obj = it.asJsonObject
+                    val manga = backupManager.parser.fromJson<MangaImpl>(obj.get(MANGA))
+                    val chapters = backupManager.parser.fromJson<List<ChapterImpl>>(obj.get(CHAPTERS) ?: JsonArray())
+                    val categories = backupManager.parser.fromJson<List<String>>(obj.get(CATEGORIES) ?: JsonArray())
+                    val history = backupManager.parser.fromJson<List<DHistory>>(obj.get(HISTORY) ?: JsonArray())
+                    val tracks = backupManager.parser.fromJson<List<TrackImpl>>(obj.get(TRACK) ?: JsonArray())
+
+                    val observable = getMangaRestoreObservable(manga, chapters, categories, history, tracks)
+                    if (observable != null) {
+                        observable
+                    } else {
+                        errors.add(Date() to "${manga.title} - ${getString(R.string.source_not_found)}")
+                        restoreProgress += 1
+                        val content = getString(R.string.dialog_restoring_source_not_found, manga.title.chop(15))
+                        showRestoreProgress(restoreProgress, restoreAmount, manga.title, errors.size, content)
+                        Observable.just(manga)
+                    }
+                }
+                .toList()
+                .doOnNext {
+                    val endTime = System.currentTimeMillis()
+                    val time = endTime - startTime
+                    val logFile = writeErrorLog()
+                    val completeIntent = Intent(BackupConst.INTENT_FILTER).apply {
+                        putExtra(BackupConst.EXTRA_TIME, time)
+                        putExtra(BackupConst.EXTRA_ERRORS, errors.size)
+                        putExtra(BackupConst.EXTRA_ERROR_FILE_PATH, logFile.parent)
+                        putExtra(BackupConst.EXTRA_ERROR_FILE, logFile.name)
+                        putExtra(BackupConst.ACTION, BackupConst.ACTION_RESTORE_COMPLETED_DIALOG)
+                    }
+                    sendLocalBroadcast(completeIntent)
+
+                }
+                .doOnError { error ->
+                    Timber.e(error)
+                    writeErrorLog()
+                    val errorIntent = Intent(BackupConst.INTENT_FILTER).apply {
+                        putExtra(BackupConst.ACTION, BackupConst.ACTION_ERROR_RESTORE_DIALOG)
+                        putExtra(BackupConst.EXTRA_ERROR_MESSAGE, error.message)
+                    }
+                    sendLocalBroadcast(errorIntent)
+                }
+                .onErrorReturn { emptyList() }
+    }
+
+    /**
+     * Write errors to error log
+     */
+    private fun writeErrorLog(): File {
+        try {
+            if (errors.isNotEmpty()) {
+                val destFile = File(externalCacheDir, "tachiyomi_restore.log")
+                val sdf = SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.getDefault())
+
+                destFile.bufferedWriter().use { out ->
+                    errors.forEach { (date, message) ->
+                        out.write("[${sdf.format(date)}] $message\n")
+                    }
+                }
+                return destFile
+            }
+        } catch (e: Exception) {
+            // Empty
+        }
+        return File("")
+    }
+
+    /**
+     * Returns a manga restore observable
+     *
+     * @param manga manga data from json
+     * @param chapters chapters data from json
+     * @param categories categories data from json
+     * @param history history data from json
+     * @param tracks tracking data from json
+     * @return [Observable] containing manga restore information
+     */
+    private fun getMangaRestoreObservable(manga: Manga, chapters: List<Chapter>,
+                                          categories: List<String>, history: List<DHistory>,
+                                          tracks: List<Track>): Observable<Manga>? {
+        // Get source
+        val source = backupManager.sourceManager.get(manga.source) ?: return null
+        val dbManga = backupManager.getMangaFromDatabase(manga)
+
+        if (dbManga == null) {
+            // Manga not in database
+            return mangaFetchObservable(source, manga, chapters, categories, history, tracks)
+        } else { // Manga in database
+            // Copy information from manga already in database
+            backupManager.restoreMangaNoFetch(manga, dbManga)
+            // Fetch rest of manga information
+            return mangaNoFetchObservable(source, manga, chapters, categories, history, tracks)
+        }
+    }
+
+    /**
+     * [Observable] that fetches manga information
+     *
+     * @param manga manga that needs updating
+     * @param chapters chapters of manga that needs updating
+     * @param categories categories that need updating
+     */
+    private fun mangaFetchObservable(source: Source, manga: Manga, chapters: List<Chapter>,
+                                     categories: List<String>, history: List<DHistory>,
+                                     tracks: List<Track>): Observable<Manga> {
+        return backupManager.restoreMangaFetchObservable(source, manga)
+                .onErrorReturn {
+                    errors.add(Date() to "${manga.title} - ${it.message}")
+                    manga
+                }
+                .filter { it.id != null }
+                .flatMap { manga ->
+                    chapterFetchObservable(source, manga, chapters)
+                            // Convert to the manga that contains new chapters.
+                            .map { manga }
+                }
+                .doOnNext {
+                    // Restore categories
+                    backupManager.restoreCategoriesForManga(it, categories)
+
+                    // Restore history
+                    backupManager.restoreHistoryForManga(history)
+
+                    // Restore tracking
+                    backupManager.restoreTrackForManga(it, tracks)
+                }
+                .doOnCompleted {
+                    restoreProgress += 1
+                    showRestoreProgress(restoreProgress, restoreAmount, manga.title, errors.size)
+                }
+    }
+
+    private fun mangaNoFetchObservable(source: Source, backupManga: Manga, chapters: List<Chapter>,
+                                       categories: List<String>, history: List<DHistory>,
+                                       tracks: List<Track>): Observable<Manga> {
+
+        return Observable.just(backupManga)
+                .flatMap { manga ->
+                    if (!backupManager.restoreChaptersForManga(manga, chapters)) {
+                        chapterFetchObservable(source, manga, chapters)
+                                .map { manga }
+                    } else {
+                        Observable.just(manga)
+                    }
+                }
+                .doOnNext {
+                    // Restore categories
+                    backupManager.restoreCategoriesForManga(it, categories)
+
+                    // Restore history
+                    backupManager.restoreHistoryForManga(history)
+
+                    // Restore tracking
+                    backupManager.restoreTrackForManga(it, tracks)
+                }
+                .doOnCompleted {
+                    restoreProgress += 1
+                    showRestoreProgress(restoreProgress, restoreAmount, backupManga.title, errors.size)
+                }
+    }
+
+    /**
+     * [Observable] that fetches chapter information
+     *
+     * @param source source of manga
+     * @param manga manga that needs updating
+     * @return [Observable] that contains manga
+     */
+    private fun chapterFetchObservable(source: Source, manga: Manga, chapters: List<Chapter>): Observable<Pair<List<Chapter>, List<Chapter>>> {
+        return backupManager.restoreChapterFetchObservable(source, manga, chapters)
+                // If there's any error, return empty update and continue.
+                .onErrorReturn {
+                    errors.add(Date() to "${manga.title} - ${it.message}")
+                    Pair(emptyList<Chapter>(), emptyList<Chapter>())
+                }
+    }
+
+
+    /**
+     * Called to update dialog in [BackupConst]
+     *
+     * @param progress restore progress
+     * @param amount total restoreAmount of manga
+     * @param title title of restored manga
+     */
+    private fun showRestoreProgress(progress: Int, amount: Int, title: String, errors: Int,
+                                    content: String = getString(R.string.dialog_restoring_backup, title.chop(15))) {
+        val intent = Intent(BackupConst.INTENT_FILTER).apply {
+            putExtra(BackupConst.EXTRA_PROGRESS, progress)
+            putExtra(BackupConst.EXTRA_AMOUNT, amount)
+            putExtra(BackupConst.EXTRA_CONTENT, content)
+            putExtra(BackupConst.EXTRA_ERRORS, errors)
+            putExtra(BackupConst.ACTION, BackupConst.ACTION_SET_PROGRESS_DIALOG)
+        }
+        sendLocalBroadcast(intent)
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/Backup.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/Backup.kt
@ -0,0 +1,23 @@
+package eu.kanade.tachiyomi.data.backup.models
+
+import java.text.SimpleDateFormat
+import java.util.*
+
+/**
+ * Json values
+ */
+object Backup {
+    const val CURRENT_VERSION = 2
+    const val MANGA = "manga"
+    const val MANGAS = "mangas"
+    const val TRACK = "track"
+    const val CHAPTERS = "chapters"
+    const val CATEGORIES = "categories"
+    const val HISTORY = "history"
+    const val VERSION = "version"
+
+    fun getDefaultFilename(): String {
+        val date = SimpleDateFormat("yyyy-MM-dd_HH-mm", Locale.getDefault()).format(Date())
+        return "tachiyomi_$date.json"
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/DHistory.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/DHistory.kt
@ -0,0 +1,3 @@
+package eu.kanade.tachiyomi.data.backup.models
+
+data class DHistory(val url: String,val lastRead: Long)
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/CategoryTypeAdapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/CategoryTypeAdapter.kt
@ -0,0 +1,31 @@
+package eu.kanade.tachiyomi.data.backup.serializer
+
+import com.github.salomonbrys.kotson.typeAdapter
+import com.google.gson.TypeAdapter
+import eu.kanade.tachiyomi.data.database.models.CategoryImpl
+
+/**
+ * JSON Serializer used to write / read [CategoryImpl] to / from json
+ */
+object CategoryTypeAdapter {
+
+    fun build(): TypeAdapter<CategoryImpl> {
+        return typeAdapter {
+            write {
+                beginArray()
+                value(it.name)
+                value(it.order)
+                endArray()
+            }
+
+            read {
+                beginArray()
+                val category = CategoryImpl()
+                category.name = nextString()
+                category.order = nextInt()
+                endArray()
+                category
+            }
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/ChapterTypeAdapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/ChapterTypeAdapter.kt
@ -0,0 +1,61 @@
+package eu.kanade.tachiyomi.data.backup.serializer
+
+import com.github.salomonbrys.kotson.typeAdapter
+import com.google.gson.TypeAdapter
+import com.google.gson.stream.JsonToken
+import eu.kanade.tachiyomi.data.database.models.ChapterImpl
+
+/**
+ * JSON Serializer used to write / read [ChapterImpl] to / from json
+ */
+object ChapterTypeAdapter {
+
+    private const val URL = "u"
+    private const val READ = "r"
+    private const val BOOKMARK = "b"
+    private const val LAST_READ = "l"
+
+    fun build(): TypeAdapter<ChapterImpl> {
+        return typeAdapter {
+            write {
+                if (it.read || it.bookmark || it.last_page_read != 0) {
+                    beginObject()
+                    name(URL)
+                    value(it.url)
+                    if (it.read) {
+                        name(READ)
+                        value(1)
+                    }
+                    if (it.bookmark) {
+                        name(BOOKMARK)
+                        value(1)
+                    }
+                    if (it.last_page_read != 0) {
+                        name(LAST_READ)
+                        value(it.last_page_read)
+                    }
+                    endObject()
+                }
+            }
+
+            read {
+                val chapter = ChapterImpl()
+                beginObject()
+                while (hasNext()) {
+                    if (peek() == JsonToken.NAME) {
+                        val name = nextName()
+
+                        when (name) {
+                            URL -> chapter.url = nextString()
+                            READ -> chapter.read = nextInt() == 1
+                            BOOKMARK -> chapter.bookmark = nextInt() == 1
+                            LAST_READ -> chapter.last_page_read = nextInt()
+                        }
+                    }
+                }
+                endObject()
+                chapter
+            }
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/HistoryTypeAdapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/HistoryTypeAdapter.kt
@ -0,0 +1,32 @@
+package eu.kanade.tachiyomi.data.backup.serializer
+
+import com.github.salomonbrys.kotson.typeAdapter
+import com.google.gson.TypeAdapter
+import eu.kanade.tachiyomi.data.backup.models.DHistory
+
+/**
+ * JSON Serializer used to write / read [DHistory] to / from json
+ */
+object HistoryTypeAdapter {
+
+    fun build(): TypeAdapter<DHistory> {
+        return typeAdapter {
+            write {
+                if (it.lastRead != 0L) {
+                    beginArray()
+                    value(it.url)
+                    value(it.lastRead)
+                    endArray()
+                }
+            }
+
+            read {
+                beginArray()
+                val url = nextString()
+                val lastRead = nextLong()
+                endArray()
+                DHistory(url, lastRead)
+            }
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/IdExclusion.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/IdExclusion.kt
@ -1,27 +0,0 @@
-package eu.kanade.tachiyomi.data.backup.serializer
-
-import com.google.gson.ExclusionStrategy
-import com.google.gson.FieldAttributes
-import eu.kanade.tachiyomi.data.database.models.Category
-import eu.kanade.tachiyomi.data.database.models.Chapter
-import eu.kanade.tachiyomi.data.database.models.Manga
-import eu.kanade.tachiyomi.data.database.models.MangaSync
-
-class IdExclusion : ExclusionStrategy {
-
-    private val categoryExclusions = listOf("id")
-    private val mangaExclusions = listOf("id")
-    private val chapterExclusions = listOf("id", "manga_id")
-    private val syncExclusions = listOf("id", "manga_id", "update")
-
-    override fun shouldSkipField(f: FieldAttributes) = when (f.declaringClass) {
-        Manga::class.java -> mangaExclusions.contains(f.name)
-        Chapter::class.java -> chapterExclusions.contains(f.name)
-        MangaSync::class.java -> syncExclusions.contains(f.name)
-        Category::class.java -> categoryExclusions.contains(f.name)
-        else -> false
-    }
-
-    override fun shouldSkipClass(clazz: Class<*>) = false
-
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/IntegerSerializer.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/IntegerSerializer.kt
@ -1,17 +0,0 @@
-package eu.kanade.tachiyomi.data.backup.serializer
-
-import com.google.gson.JsonElement
-import com.google.gson.JsonPrimitive
-import com.google.gson.JsonSerializationContext
-import com.google.gson.JsonSerializer
-
-import java.lang.reflect.Type
-
-class IntegerSerializer : JsonSerializer<Int> {
-
-    override fun serialize(value: Int?, type: Type, context: JsonSerializationContext): JsonElement? {
-        if (value != null && value !== 0)
-            return JsonPrimitive(value)
-        return null
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/MangaTypeAdapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/MangaTypeAdapter.kt
@ -0,0 +1,37 @@
+package eu.kanade.tachiyomi.data.backup.serializer
+
+import com.github.salomonbrys.kotson.typeAdapter
+import com.google.gson.TypeAdapter
+import eu.kanade.tachiyomi.data.database.models.MangaImpl
+
+/**
+ * JSON Serializer used to write / read [MangaImpl] to / from json
+ */
+object MangaTypeAdapter {
+
+    fun build(): TypeAdapter<MangaImpl> {
+        return typeAdapter {
+            write {
+                beginArray()
+                value(it.url)
+                value(it.title)
+                value(it.source)
+                value(it.viewer)
+                value(it.chapter_flags)
+                endArray()
+            }
+
+            read {
+                beginArray()
+                val manga = MangaImpl()
+                manga.url = nextString()
+                manga.title = nextString()
+                manga.source = nextLong()
+                manga.viewer = nextInt()
+                manga.chapter_flags = nextInt()
+                endArray()
+                manga
+            }
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/TrackTypeAdapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/serializer/TrackTypeAdapter.kt
@ -0,0 +1,53 @@
+package eu.kanade.tachiyomi.data.backup.serializer
+
+import com.github.salomonbrys.kotson.typeAdapter
+import com.google.gson.TypeAdapter
+import com.google.gson.stream.JsonToken
+import eu.kanade.tachiyomi.data.database.models.TrackImpl
+
+/**
+ * JSON Serializer used to write / read [TrackImpl] to / from json
+ */
+object TrackTypeAdapter {
+
+    private const val SYNC = "s"
+    private const val REMOTE = "r"
+    private const val TITLE = "t"
+    private const val LAST_READ = "l"
+
+    fun build(): TypeAdapter<TrackImpl> {
+        return typeAdapter {
+            write {
+                beginObject()
+                name(TITLE)
+                value(it.title)
+                name(SYNC)
+                value(it.sync_id)
+                name(REMOTE)
+                value(it.remote_id)
+                name(LAST_READ)
+                value(it.last_chapter_read)
+                endObject()
+            }
+
+            read {
+                val track = TrackImpl()
+                beginObject()
+                while (hasNext()) {
+                    if (peek() == JsonToken.NAME) {
+                        val name = nextName()
+
+                        when (name) {
+                            TITLE -> track.title = nextString()
+                            SYNC -> track.sync_id = nextInt()
+                            REMOTE -> track.remote_id = nextInt()
+                            LAST_READ -> track.last_chapter_read = nextInt()
+                        }
+                    }
+                }
+                endObject()
+                track
+            }
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt
@ -2,18 +2,19 @@ package eu.kanade.tachiyomi.data.cache

 import android.content.Context
 import android.text.format.Formatter
+import com.github.salomonbrys.kotson.fromJson
 import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
 import com.jakewharton.disklrucache.DiskLruCache
-import eu.kanade.tachiyomi.data.source.model.Page
-import eu.kanade.tachiyomi.util.DiskUtils
-import eu.kanade.tachiyomi.util.saveImageTo
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.util.DiskUtil
+import eu.kanade.tachiyomi.util.saveTo
 import okhttp3.Response
 import okio.Okio
 import rx.Observable
+import uy.kohesive.injekt.injectLazy
 import java.io.File
 import java.io.IOException
-import java.lang.reflect.Type

 /**
 * Class used to create chapter cache
@ -26,15 +27,6 @@ import java.lang.reflect.Type
 */
 class ChapterCache(private val context: Context) {

-    /** Google Json class used for parsing JSON files.  */
-    private val gson: Gson = Gson()
-
-    /** Cache class used for cache management.  */
-    private val diskCache: DiskLruCache
-
-    /** Page list collection used for deserializing from JSON.  */
-    private val pageListCollection: Type = object : TypeToken<List<Page>>() {}.type
-
    companion object {
        /** Name of cache directory.  */
        const val PARAMETER_CACHE_DIRECTORY = "chapter_disk_cache"
@ -49,38 +41,41 @@ class ChapterCache(private val context: Context) {
        const val PARAMETER_CACHE_SIZE = 75L * 1024 * 1024
    }

-    init {
-        // Open cache in default cache directory.
-        diskCache = DiskLruCache.open(
-                File(context.cacheDir, PARAMETER_CACHE_DIRECTORY),
-                PARAMETER_APP_VERSION,
-                PARAMETER_VALUE_COUNT,
-                PARAMETER_CACHE_SIZE)
-    }
+    /** Google Json class used for parsing JSON files.  */
+    private val gson: Gson by injectLazy()
+
+    /** Parent directory of the cache. Ensure not null and not root directory or fallback
+     * to internal cache directory. **/
+    private val basePath = context.externalCacheDir?.takeIf { it.absolutePath.length > 1 }
+            ?: context.cacheDir
+
+    /** Cache class used for cache management.  */
+    private val diskCache = DiskLruCache.open(File(basePath, PARAMETER_CACHE_DIRECTORY),
+            PARAMETER_APP_VERSION,
+            PARAMETER_VALUE_COUNT,
+            PARAMETER_CACHE_SIZE)

    /**
     * Returns directory of cache.
-     * @return directory of cache.
     */
    val cacheDir: File
        get() = diskCache.directory

    /**
     * Returns real size of directory.
-     * @return real size of directory.
     */
    private val realSize: Long
-        get() = DiskUtils.getDirectorySize(cacheDir)
+        get() = DiskUtil.getDirectorySize(cacheDir)

    /**
     * Returns real size of directory in human readable format.
-     * @return real size of directory.
     */
    val readableSize: String
        get() = Formatter.formatFileSize(context, realSize)

    /**
     * Remove file from cache.
+     *
     * @param file name of file "md5.0".
     * @return status of deletion for the file.
     */
@ -101,27 +96,29 @@ class ChapterCache(private val context: Context) {

    /**
     * Get page list from cache.
-     * @param chapterUrl the url of the chapter.
+     *
+     * @param chapter the chapter.
     * @return an observable of the list of pages.
     */
-    fun getPageListFromCache(chapterUrl: String): Observable<List<Page>> {
-        return Observable.fromCallable<List<Page>> {
+    fun getPageListFromCache(chapter: Chapter): Observable<List<Page>> {
+        return Observable.fromCallable {
            // Get the key for the chapter.
-            val key = DiskUtils.hashKeyForDisk(chapterUrl)
+            val key = DiskUtil.hashKeyForDisk(getKey(chapter))

            // Convert JSON string to list of objects. Throws an exception if snapshot is null
            diskCache.get(key).use {
-                gson.fromJson(it.getString(0), pageListCollection)
+                gson.fromJson<List<Page>>(it.getString(0))
            }
        }
    }

    /**
     * Add page list to disk cache.
-     * @param chapterUrl the url of the chapter.
+     *
+     * @param chapter the chapter.
     * @param pages list of pages.
     */
-    fun putPageListToCache(chapterUrl: String, pages: List<Page>) {
+    fun putPageListToCache(chapter: Chapter, pages: List<Page>) {
        // Convert list of pages to json string.
        val cachedValue = gson.toJson(pages)

@ -130,7 +127,7 @@ class ChapterCache(private val context: Context) {

        try {
            // Get editor from md5 key.
-            val key = DiskUtils.hashKeyForDisk(chapterUrl)
+            val key = DiskUtil.hashKeyForDisk(getKey(chapter))
            editor = diskCache.edit(key) ?: return

            // Write chapter urls to cache.
@ -151,59 +148,61 @@ class ChapterCache(private val context: Context) {
    }

    /**
-     * Check if image is in cache.
+     * Returns true if image is in cache.
+     *
     * @param imageUrl url of image.
     * @return true if in cache otherwise false.
     */
    fun isImageInCache(imageUrl: String): Boolean {
        try {
-            return diskCache.get(DiskUtils.hashKeyForDisk(imageUrl)) != null
+            return diskCache.get(DiskUtil.hashKeyForDisk(imageUrl)) != null
        } catch (e: IOException) {
            return false
        }
    }

    /**
-     * Get image path from url.
+     * Get image file from url.
+     *
     * @param imageUrl url of image.
     * @return path of image.
     */
-    fun getImagePath(imageUrl: String): String? {
-        try {
-            // Get file from md5 key.
-            val imageName = DiskUtils.hashKeyForDisk(imageUrl) + ".0"
-            return File(diskCache.directory, imageName).canonicalPath
-        } catch (e: IOException) {
-            return null
-        }
+    fun getImageFile(imageUrl: String): File {
+        // Get file from md5 key.
+        val imageName = DiskUtil.hashKeyForDisk(imageUrl) + ".0"
+        return File(diskCache.directory, imageName)
    }

    /**
     * Add image to cache.
+     * 
     * @param imageUrl url of image.
     * @param response http response from page.
     * @throws IOException image error.
     */
    @Throws(IOException::class)
-    fun putImageToCache(imageUrl: String, response: Response, reencode: Boolean) {
+    fun putImageToCache(imageUrl: String, response: Response) {
        // Initialize editor (edits the values for an entry).
        var editor: DiskLruCache.Editor? = null

        try {
            // Get editor from md5 key.
-            val key = DiskUtils.hashKeyForDisk(imageUrl)
+            val key = DiskUtil.hashKeyForDisk(imageUrl)
            editor = diskCache.edit(key) ?: throw IOException("Unable to edit key")

            // Get OutputStream and write image with Okio.
-            response.body().source().saveImageTo(editor.newOutputStream(0), reencode)
+            response.body()!!.source().saveTo(editor.newOutputStream(0))

            diskCache.flush()
            editor.commit()
        } finally {
-            response.body().close()
+            response.body()?.close()
            editor?.abortUnlessCommitted()
        }
    }

+    private fun getKey(chapter: Chapter): String {
+        return "${chapter.manga_id}${chapter.url}"
+    }
 }

--- a/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt
@ -1,12 +1,7 @@
 package eu.kanade.tachiyomi.data.cache

 import android.content.Context
-import com.bumptech.glide.Glide
-import com.bumptech.glide.load.model.GlideUrl
-import com.bumptech.glide.load.model.LazyHeaders
-import com.bumptech.glide.request.animation.GlideAnimation
-import com.bumptech.glide.request.target.SimpleTarget
-import eu.kanade.tachiyomi.util.DiskUtils
+import eu.kanade.tachiyomi.util.DiskUtil
 import java.io.File
 import java.io.IOException
 import java.io.InputStream
@ -25,82 +20,21 @@ class CoverCache(private val context: Context) {
    /**
     * Cache directory used for cache management.
     */
-    private val cacheDir: File = File(context.externalCacheDir, "cover_disk_cache")
-
-    /**
-     * Download the cover with Glide and save the file.
-     * @param thumbnailUrl url of thumbnail.
-     * @param headers      headers included in Glide request.
-     * @param onReady      function to call when the image is ready
-     */
-    fun save(thumbnailUrl: String?, headers: LazyHeaders?, onReady: ((File) -> Unit)? = null) {
-        // Check if url is empty.
-        if (thumbnailUrl.isNullOrEmpty())
-            return
-
-        // Download the cover with Glide and save the file.
-        val url = GlideUrl(thumbnailUrl, headers)
-        Glide.with(context)
-                .load(url)
-                .downloadOnly(object : SimpleTarget<File>() {
-                    override fun onResourceReady(resource: File, anim: GlideAnimation<in File>) {
-                        try {
-                            // Copy the cover from Glide's cache to local cache.
-                            copyToCache(thumbnailUrl!!, resource)
-
-                            onReady?.invoke(resource)
-                        } catch (e: IOException) {
-                            // Do nothing.
-                        }
-                    }
-                })
-    }
-
-    /**
-     * Save or load the image from cache
-     * @param thumbnailUrl the thumbnail url.
-     * @param headers      headers included in Glide request.
-     * @param onReady      function to call when the image is ready
-     */
-    fun saveOrLoadFromCache(thumbnailUrl: String?, headers: LazyHeaders?, onReady: ((File) -> Unit)?) {
-        // Check if url is empty.
-        if (thumbnailUrl.isNullOrEmpty())
-            return
-
-        // If file exist load it otherwise save it.
-        val localCover = getCoverFromCache(thumbnailUrl!!)
-        if (localCover.exists()) {
-            onReady?.invoke(localCover)
-        } else {
-            save(thumbnailUrl, headers, onReady)
-        }
-    }
+    private val cacheDir = context.getExternalFilesDir("covers")

    /**
     * Returns the cover from cache.
+     *
     * @param thumbnailUrl the thumbnail url.
     * @return cover image.
     */
-    private fun getCoverFromCache(thumbnailUrl: String): File {
-        return File(cacheDir, DiskUtils.hashKeyForDisk(thumbnailUrl))
-    }
-
-    /**
-     * Copy the given file to this cache.
-     * @param thumbnailUrl url of thumbnail.
-     * @param sourceFile   the source file of the cover image.
-     * @throws IOException if there's any error.
-     */
-    @Throws(IOException::class)
-    fun copyToCache(thumbnailUrl: String, sourceFile: File) {
-        // Get destination file.
-        val destFile = getCoverFromCache(thumbnailUrl)
-
-        sourceFile.copyTo(destFile, overwrite = true)
+    fun getCoverFile(thumbnailUrl: String): File {
+        return File(cacheDir, DiskUtil.hashKeyForDisk(thumbnailUrl))
    }

    /**
     * Copy the given stream to this cache.
+     *
     * @param thumbnailUrl url of the thumbnail.
     * @param inputStream  the stream to copy.
     * @throws IOException if there's any error.
@ -108,13 +42,14 @@ class CoverCache(private val context: Context) {
    @Throws(IOException::class)
    fun copyToCache(thumbnailUrl: String, inputStream: InputStream) {
        // Get destination file.
-        val destFile = getCoverFromCache(thumbnailUrl)
+        val destFile = getCoverFile(thumbnailUrl)

        destFile.outputStream().use { inputStream.copyTo(it) }
    }

    /**
     * Delete the cover file from the cache.
+     *
     * @param thumbnailUrl the thumbnail url.
     * @return status of deletion.
     */
@ -124,7 +59,7 @@ class CoverCache(private val context: Context) {
            return false

        // Remove file.
-        val file = File(cacheDir, DiskUtils.hashKeyForDisk(thumbnailUrl))
+        val file = getCoverFile(thumbnailUrl!!)
        return file.exists() && file.delete()
    }

--- a/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverGlideModule.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverGlideModule.kt
@ -1,22 +0,0 @@
-package eu.kanade.tachiyomi.data.cache
-
-import android.content.Context
-import com.bumptech.glide.Glide
-import com.bumptech.glide.GlideBuilder
-import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory
-import com.bumptech.glide.module.GlideModule
-
-/**
- * Class used to update Glide module settings
- */
-class CoverGlideModule : GlideModule {
-
-    override fun applyOptions(context: Context, builder: GlideBuilder) {
-        // Set the cache size of Glide to 15 MiB
-        builder.setDiskCache(InternalCacheDiskCacheFactory(context, 15 * 1024 * 1024))
-    }
-
-    override fun registerComponents(context: Context, glide: Glide) {
-        // Nothing to see here!
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/DatabaseHelper.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/DatabaseHelper.kt
@ -1,315 +1,29 @@
 package eu.kanade.tachiyomi.data.database

 import android.content.Context
-import android.util.Pair
-import com.pushtorefresh.storio.Queries
 import com.pushtorefresh.storio.sqlite.impl.DefaultStorIOSQLite
-import com.pushtorefresh.storio.sqlite.operations.get.PreparedGetObject
-import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
-import com.pushtorefresh.storio.sqlite.queries.Query
-import com.pushtorefresh.storio.sqlite.queries.RawQuery
+import eu.kanade.tachiyomi.data.database.mappers.*
 import eu.kanade.tachiyomi.data.database.models.*
-import eu.kanade.tachiyomi.data.database.resolvers.LibraryMangaGetResolver
-import eu.kanade.tachiyomi.data.database.resolvers.MangaChapterGetResolver
-import eu.kanade.tachiyomi.data.database.tables.*
-import eu.kanade.tachiyomi.data.mangasync.base.MangaSyncService
-import eu.kanade.tachiyomi.data.source.base.Source
-import eu.kanade.tachiyomi.util.ChapterRecognition
-import rx.Observable
-import java.util.*
+import eu.kanade.tachiyomi.data.database.queries.*

-open class DatabaseHelper(context: Context) {
+/**
+ * This class provides operations to manage the database through its interfaces.
+ */
+open class DatabaseHelper(context: Context)
+: MangaQueries, ChapterQueries, TrackQueries, CategoryQueries, MangaCategoryQueries, HistoryQueries {

-    val db = DefaultStorIOSQLite.builder()
+    override val db = DefaultStorIOSQLite.builder()
            .sqliteOpenHelper(DbOpenHelper(context))
-            .addTypeMapping(Manga::class.java, MangaSQLiteTypeMapping())
-            .addTypeMapping(Chapter::class.java, ChapterSQLiteTypeMapping())
-            .addTypeMapping(MangaSync::class.java, MangaSyncSQLiteTypeMapping())
-            .addTypeMapping(Category::class.java, CategorySQLiteTypeMapping())
-            .addTypeMapping(MangaCategory::class.java, MangaCategorySQLiteTypeMapping())
+            .addTypeMapping(Manga::class.java, MangaTypeMapping())
+            .addTypeMapping(Chapter::class.java, ChapterTypeMapping())
+            .addTypeMapping(Track::class.java, TrackTypeMapping())
+            .addTypeMapping(Category::class.java, CategoryTypeMapping())
+            .addTypeMapping(MangaCategory::class.java, MangaCategoryTypeMapping())
+            .addTypeMapping(History::class.java, HistoryTypeMapping())
            .build()

-    inline fun inTransaction(func: DatabaseHelper.() -> Unit) {
-        db.internal().beginTransaction()
-        try {
-            func()
-            db.internal().setTransactionSuccessful()
-        } finally {
-            db.internal().endTransaction()
-        }
-    }
+    inline fun inTransaction(block: () -> Unit) = db.inTransaction(block)

-    // Mangas related queries
-
-    fun getMangas() = db.get()
-            .listOfObjects(Manga::class.java)
-            .withQuery(Query.builder()
-                    .table(MangaTable.TABLE)
-                    .build())
-            .prepare()
-
-    fun getLibraryMangas() = db.get()
-            .listOfObjects(Manga::class.java)
-            .withQuery(RawQuery.builder()
-                    .query(libraryQuery)
-                    .observesTables(MangaTable.TABLE, ChapterTable.TABLE, MangaCategoryTable.TABLE)
-                    .build())
-            .withGetResolver(LibraryMangaGetResolver.INSTANCE)
-            .prepare()
-
-    open fun getFavoriteMangas() = db.get()
-            .listOfObjects(Manga::class.java)
-            .withQuery(Query.builder()
-                    .table(MangaTable.TABLE)
-                    .where("${MangaTable.COLUMN_FAVORITE} = ?")
-                    .whereArgs(1)
-                    .orderBy(MangaTable.COLUMN_TITLE)
-                    .build())
-            .prepare()
-
-    fun getManga(url: String, sourceId: Int) = db.get()
-            .`object`(Manga::class.java)
-            .withQuery(Query.builder()
-                    .table(MangaTable.TABLE)
-                    .where("${MangaTable.COLUMN_URL} = ? AND ${MangaTable.COLUMN_SOURCE} = ?")
-                    .whereArgs(url, sourceId)
-                    .build())
-            .prepare()
-
-    fun getManga(id: Long) = db.get()
-            .`object`(Manga::class.java)
-            .withQuery(Query.builder()
-                    .table(MangaTable.TABLE)
-                    .where("${MangaTable.COLUMN_ID} = ?")
-                    .whereArgs(id)
-                    .build())
-            .prepare()
-
-    fun insertManga(manga: Manga) = db.put().`object`(manga).prepare()
-
-    fun insertMangas(mangas: List<Manga>) = db.put().objects(mangas).prepare()
-
-    fun deleteManga(manga: Manga) = db.delete().`object`(manga).prepare()
-
-    fun deleteMangas(mangas: List<Manga>) = db.delete().objects(mangas).prepare()
-
-    fun deleteMangasNotInLibrary() = db.delete()
-            .byQuery(DeleteQuery.builder()
-                    .table(MangaTable.TABLE)
-                    .where("${MangaTable.COLUMN_FAVORITE} = ?")
-                    .whereArgs(0)
-                    .build())
-            .prepare()
-
-
-    // Chapters related queries
-
-    fun getChapters(manga: Manga) = db.get()
-            .listOfObjects(Chapter::class.java)
-            .withQuery(Query.builder()
-                    .table(ChapterTable.TABLE)
-                    .where("${ChapterTable.COLUMN_MANGA_ID} = ?")
-                    .whereArgs(manga.id)
-                    .build())
-            .prepare()
-
-    fun getRecentChapters(date: Date) = db.get()
-            .listOfObjects(MangaChapter::class.java)
-            .withQuery(RawQuery.builder()
-                    .query(getRecentsQuery(date))
-                    .observesTables(ChapterTable.TABLE)
-                    .build())
-            .withGetResolver(MangaChapterGetResolver.INSTANCE)
-            .prepare()
-
-    fun getNextChapter(chapter: Chapter): PreparedGetObject<Chapter> {
-        // Add a delta to the chapter number, because binary decimal representation
-        // can retrieve the same chapter again
-        val chapterNumber = chapter.chapter_number + 0.00001
-
-        return db.get()
-                .`object`(Chapter::class.java)
-                .withQuery(Query.builder()
-                        .table(ChapterTable.TABLE)
-                        .where("${ChapterTable.COLUMN_MANGA_ID} = ? AND " +
-                                "${ChapterTable.COLUMN_CHAPTER_NUMBER} > ? AND " +
-                                "${ChapterTable.COLUMN_CHAPTER_NUMBER} <= ?")
-                        .whereArgs(chapter.manga_id, chapterNumber, chapterNumber + 1)
-                        .orderBy(ChapterTable.COLUMN_CHAPTER_NUMBER)
-                        .limit(1)
-                        .build())
-                .prepare()
-    }
-
-    fun getPreviousChapter(chapter: Chapter): PreparedGetObject<Chapter> {
-        // Add a delta to the chapter number, because binary decimal representation
-        // can retrieve the same chapter again
-        val chapterNumber = chapter.chapter_number - 0.00001
-
-        return db.get()
-                .`object`(Chapter::class.java)
-                .withQuery(Query.builder().table(ChapterTable.TABLE)
-                        .where("${ChapterTable.COLUMN_MANGA_ID} = ? AND " +
-                                "${ChapterTable.COLUMN_CHAPTER_NUMBER} < ? AND " +
-                                "${ChapterTable.COLUMN_CHAPTER_NUMBER} >= ?")
-                        .whereArgs(chapter.manga_id, chapterNumber, chapterNumber - 1)
-                        .orderBy(ChapterTable.COLUMN_CHAPTER_NUMBER + " DESC")
-                        .limit(1)
-                        .build())
-                .prepare()
-    }
-
-    fun getNextUnreadChapter(manga: Manga) = db.get()
-            .`object`(Chapter::class.java)
-            .withQuery(Query.builder()
-                    .table(ChapterTable.TABLE)
-                    .where("${ChapterTable.COLUMN_MANGA_ID} = ? AND " +
-                            "${ChapterTable.COLUMN_READ} = ? AND " +
-                            "${ChapterTable.COLUMN_CHAPTER_NUMBER} >= ?")
-                    .whereArgs(manga.id, 0, 0)
-                    .orderBy(ChapterTable.COLUMN_CHAPTER_NUMBER)
-                    .limit(1)
-                    .build())
-            .prepare()
-
-    fun insertChapter(chapter: Chapter) = db.put().`object`(chapter).prepare()
-
-    fun insertChapters(chapters: List<Chapter>) = db.put().objects(chapters).prepare()
-
-    // Add new chapters or delete if the source deletes them
-    open fun insertOrRemoveChapters(manga: Manga, sourceChapters: List<Chapter>, source: Source): Observable<Pair<Int, Int>> {
-        val dbChapters = getChapters(manga).executeAsBlocking()
-
-        val newChapters = Observable.from(sourceChapters)
-                .filter { it !in dbChapters }
-                .doOnNext { c ->
-                    c.manga_id = manga.id
-                    source.parseChapterNumber(c)
-                    ChapterRecognition.parseChapterNumber(c, manga)
-                }.toList()
-
-        val deletedChapters = Observable.from(dbChapters)
-                .filter { it !in sourceChapters }
-                .toList()
-
-        return Observable.zip(newChapters, deletedChapters) { toAdd, toDelete ->
-            var added = 0
-            var deleted = 0
-            var readded = 0
-
-            inTransaction {
-                val deletedReadChapterNumbers = TreeSet<Float>()
-                if (!toDelete.isEmpty()) {
-                    for (c in toDelete) {
-                        if (c.read) {
-                            deletedReadChapterNumbers.add(c.chapter_number)
-                        }
-                    }
-                    deleted = deleteChapters(toDelete).executeAsBlocking().results().size
-                }
-
-                if (!toAdd.isEmpty()) {
-                    // Set the date fetch for new items in reverse order to allow another sorting method.
-                    // Sources MUST return the chapters from most to less recent, which is common.
-                    var now = Date().time
-
-                    for (i in toAdd.indices.reversed()) {
-                        val c = toAdd[i]
-                        c.date_fetch = now++
-                        // Try to mark already read chapters as read when the source deletes them
-                        if (c.chapter_number != -1f && c.chapter_number in deletedReadChapterNumbers) {
-                            c.read = true
-                            readded++
-                        }
-                    }
-                    added = insertChapters(toAdd).executeAsBlocking().numberOfInserts()
-                }
-            }
-            Pair.create(added - readded, deleted - readded)
-        }
-    }
-
-    fun deleteChapter(chapter: Chapter) = db.delete().`object`(chapter).prepare()
-
-    fun deleteChapters(chapters: List<Chapter>) = db.delete().objects(chapters).prepare()
-
-    // Manga sync related queries
-
-    fun getMangaSync(manga: Manga, sync: MangaSyncService) = db.get()
-            .`object`(MangaSync::class.java)
-            .withQuery(Query.builder()
-                    .table(MangaSyncTable.TABLE)
-                    .where("${MangaSyncTable.COLUMN_MANGA_ID} = ? AND " +
-                            "${MangaSyncTable.COLUMN_SYNC_ID} = ?")
-                    .whereArgs(manga.id, sync.id)
-                    .build())
-            .prepare()
-
-    fun getMangasSync(manga: Manga) = db.get()
-            .listOfObjects(MangaSync::class.java)
-            .withQuery(Query.builder()
-                    .table(MangaSyncTable.TABLE)
-                    .where("${MangaSyncTable.COLUMN_MANGA_ID} = ?")
-                    .whereArgs(manga.id)
-                    .build())
-            .prepare()
-
-    fun insertMangaSync(manga: MangaSync) = db.put().`object`(manga).prepare()
-
-    fun insertMangasSync(mangas: List<MangaSync>) = db.put().objects(mangas).prepare()
-
-    fun deleteMangaSync(manga: MangaSync) = db.delete().`object`(manga).prepare()
-
-    fun deleteMangaSyncForManga(manga: Manga) = db.delete()
-            .byQuery(DeleteQuery.builder()
-                    .table(MangaSyncTable.TABLE)
-                    .where("${MangaSyncTable.COLUMN_MANGA_ID} = ?")
-                    .whereArgs(manga.id)
-                    .build())
-            .prepare()
-
-    // Categories related queries
-
-    fun getCategories() = db.get()
-            .listOfObjects(Category::class.java)
-            .withQuery(Query.builder()
-                    .table(CategoryTable.TABLE)
-                    .orderBy(CategoryTable.COLUMN_ORDER)
-                    .build())
-            .prepare()
-
-    fun getCategoriesForManga(manga: Manga) = db.get()
-            .listOfObjects(Category::class.java)
-            .withQuery(RawQuery.builder()
-                    .query(getCategoriesForMangaQuery(manga))
-                    .build())
-            .prepare()
-
-    fun insertCategory(category: Category) = db.put().`object`(category).prepare()
-
-    fun insertCategories(categories: List<Category>) = db.put().objects(categories).prepare()
-
-    fun deleteCategory(category: Category) = db.delete().`object`(category).prepare()
-
-    fun deleteCategories(categories: List<Category>) = db.delete().objects(categories).prepare()
-
-    fun insertMangaCategory(mangaCategory: MangaCategory) = db.put().`object`(mangaCategory).prepare()
-
-    fun insertMangasCategories(mangasCategories: List<MangaCategory>) = db.put().objects(mangasCategories).prepare()
-
-    fun deleteOldMangasCategories(mangas: List<Manga>) = db.delete()
-            .byQuery(DeleteQuery.builder()
-                    .table(MangaCategoryTable.TABLE)
-                    .where("${MangaCategoryTable.COLUMN_MANGA_ID} IN (${Queries.placeholders(mangas.size)})")
-                    .whereArgs(*mangas.map { it.id }.toTypedArray())
-                    .build())
-            .prepare()
-
-    fun setMangaCategories(mangasCategories: List<MangaCategory>, mangas: List<Manga>) {
-        inTransaction {
-            deleteOldMangasCategories(mangas).executeAsBlocking()
-            insertMangasCategories(mangasCategories).executeAsBlocking()
-        }
-    }
+    fun lowLevel() = db.lowLevel()

 }
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/DbExtensions.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/DbExtensions.kt
@ -0,0 +1,25 @@
+package eu.kanade.tachiyomi.data.database
+
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+
+inline fun StorIOSQLite.inTransaction(block: () -> Unit) {
+    lowLevel().beginTransaction()
+    try {
+        block()
+        lowLevel().setTransactionSuccessful()
+    } finally {
+        lowLevel().endTransaction()
+    }
+}
+
+inline fun <T> StorIOSQLite.inTransactionReturn(block: () -> T): T {
+    lowLevel().beginTransaction()
+    try {
+        val result = block()
+        lowLevel().setTransactionSuccessful()
+        return result
+    } finally {
+        lowLevel().endTransaction()
+    }
+}
+
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/DbOpenHelper.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/DbOpenHelper.kt
@ -5,7 +5,8 @@ import android.database.sqlite.SQLiteDatabase
 import android.database.sqlite.SQLiteOpenHelper
 import eu.kanade.tachiyomi.data.database.tables.*

-class DbOpenHelper(context: Context) : SQLiteOpenHelper(context, DbOpenHelper.DATABASE_NAME, null, DbOpenHelper.DATABASE_VERSION) {
+class DbOpenHelper(context: Context)
+: SQLiteOpenHelper(context, DATABASE_NAME, null, DATABASE_VERSION) {

    companion object {
        /**
@ -16,28 +17,47 @@ class DbOpenHelper(context: Context) : SQLiteOpenHelper(context, DbOpenHelper.DA
        /**
         * Version of the database.
         */
-        const val DATABASE_VERSION = 1
+        const val DATABASE_VERSION = 5
    }

    override fun onCreate(db: SQLiteDatabase) = with(db) {
-        execSQL(MangaTable.getCreateTableQuery())
-        execSQL(ChapterTable.getCreateTableQuery())
-        execSQL(MangaSyncTable.getCreateTableQuery())
-        execSQL(CategoryTable.getCreateTableQuery())
-        execSQL(MangaCategoryTable.getCreateTableQuery())
+        execSQL(MangaTable.createTableQuery)
+        execSQL(ChapterTable.createTableQuery)
+        execSQL(TrackTable.createTableQuery)
+        execSQL(CategoryTable.createTableQuery)
+        execSQL(MangaCategoryTable.createTableQuery)
+        execSQL(HistoryTable.createTableQuery)

        // DB indexes
-        execSQL(MangaTable.getCreateUrlIndexQuery())
-        execSQL(MangaTable.getCreateFavoriteIndexQuery())
-        execSQL(ChapterTable.getCreateMangaIdIndexQuery())
+        execSQL(MangaTable.createUrlIndexQuery)
+        execSQL(MangaTable.createFavoriteIndexQuery)
+        execSQL(ChapterTable.createMangaIdIndexQuery)
+        execSQL(HistoryTable.createChapterIdIndexQuery)
    }

    override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
+        if (oldVersion < 2) {
+            db.execSQL(ChapterTable.sourceOrderUpdateQuery)

+            // Fix kissmanga covers after supporting cloudflare
+            db.execSQL("""UPDATE mangas SET thumbnail_url =
+                    REPLACE(thumbnail_url, '93.174.95.110', 'kissmanga.com') WHERE source = 4""")
+        }
+        if (oldVersion < 3) {
+            // Initialize history tables
+            db.execSQL(HistoryTable.createTableQuery)
+            db.execSQL(HistoryTable.createChapterIdIndexQuery)
+        }
+        if (oldVersion < 4) {
+            db.execSQL(ChapterTable.bookmarkUpdateQuery)
+        }
+        if (oldVersion < 5) {
+            db.execSQL(ChapterTable.addScanlator)
+        }
    }

    override fun onConfigure(db: SQLiteDatabase) {
        db.setForeignKeyConstraintsEnabled(true)
    }

-}
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/DbProvider.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/DbProvider.kt
@ -0,0 +1,9 @@
+package eu.kanade.tachiyomi.data.database
+
+import com.pushtorefresh.storio.sqlite.impl.DefaultStorIOSQLite
+
+interface DbProvider {
+
+    val db: DefaultStorIOSQLite
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/RawQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/RawQueries.kt
@ -1,54 +0,0 @@
-package eu.kanade.tachiyomi.data.database
-
-import java.util.*
-import eu.kanade.tachiyomi.data.database.models.Manga as MangaModel
-import eu.kanade.tachiyomi.data.database.tables.CategoryTable as Category
-import eu.kanade.tachiyomi.data.database.tables.ChapterTable as Chapter
-import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable as MangaCategory
-import eu.kanade.tachiyomi.data.database.tables.MangaTable as Manga
-
-/**
- * Query to get the manga from the library, with their categories and unread count.
- */
-val libraryQuery =
-    "SELECT M.*, COALESCE(MC.${MangaCategory.COLUMN_CATEGORY_ID}, 0) AS ${Manga.COLUMN_CATEGORY} " +
-    "FROM (" +
-        "SELECT ${Manga.TABLE}.*, COALESCE(C.unread, 0) AS ${Manga.COLUMN_UNREAD} " +
-        "FROM ${Manga.TABLE} " +
-        "LEFT JOIN (" +
-            "SELECT ${Chapter.COLUMN_MANGA_ID}, COUNT(*) AS unread " +
-            "FROM ${Chapter.TABLE} " +
-            "WHERE ${Chapter.COLUMN_READ} = 0 " +
-            "GROUP BY ${Chapter.COLUMN_MANGA_ID}" +
-        ") AS C " +
-        "ON ${Manga.COLUMN_ID} = C.${Chapter.COLUMN_MANGA_ID} " +
-        "WHERE ${Manga.COLUMN_FAVORITE} = 1 " +
-        "GROUP BY ${Manga.COLUMN_ID} " +
-        "ORDER BY ${Manga.COLUMN_TITLE}" +
-    ") AS M " +
-    "LEFT JOIN (" +
-        "SELECT * FROM ${MangaCategory.TABLE}) AS MC " +
-        "ON MC.${MangaCategory.COLUMN_MANGA_ID} = M.${Manga.COLUMN_ID}"
-
-/**
- * Query to get the recent chapters of manga from the library up to a date.
- *
- * @param date the delimiting date.
- */
-fun getRecentsQuery(date: Date): String =
-    "SELECT ${Manga.TABLE}.${Manga.COLUMN_URL} as mangaUrl, * FROM ${Manga.TABLE} JOIN ${Chapter.TABLE} " +
-    "ON ${Manga.TABLE}.${Manga.COLUMN_ID} = ${Chapter.TABLE}.${Chapter.COLUMN_MANGA_ID} " +
-    "WHERE ${Manga.COLUMN_FAVORITE} = 1 AND ${Chapter.COLUMN_DATE_UPLOAD} > ${date.time} " +
-    "ORDER BY ${Chapter.COLUMN_DATE_UPLOAD} DESC"
-
-
-/**
- * Query to get the categorias for a manga.
- *
- * @param manga the manga.
- */
-fun getCategoriesForMangaQuery(manga: MangaModel) =
-    "SELECT ${Category.TABLE}.* FROM ${Category.TABLE} " +
-    "JOIN ${MangaCategory.TABLE} ON ${Category.TABLE}.${Category.COLUMN_ID} = " +
-    "${MangaCategory.TABLE}.${MangaCategory.COLUMN_CATEGORY_ID} " +
-    "WHERE ${MangaCategory.COLUMN_MANGA_ID} = ${manga.id}"
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/CategoryTypeMapping.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/CategoryTypeMapping.kt
@ -0,0 +1,63 @@
+package eu.kanade.tachiyomi.data.database.mappers
+
+import android.content.ContentValues
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.SQLiteTypeMapping
+import com.pushtorefresh.storio.sqlite.operations.delete.DefaultDeleteResolver
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import com.pushtorefresh.storio.sqlite.operations.put.DefaultPutResolver
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.InsertQuery
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.models.Category
+import eu.kanade.tachiyomi.data.database.models.CategoryImpl
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable.COL_FLAGS
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable.COL_ID
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable.COL_NAME
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable.COL_ORDER
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable.TABLE
+
+class CategoryTypeMapping : SQLiteTypeMapping<Category>(
+        CategoryPutResolver(),
+        CategoryGetResolver(),
+        CategoryDeleteResolver()
+)
+
+class CategoryPutResolver : DefaultPutResolver<Category>() {
+
+    override fun mapToInsertQuery(obj: Category) = InsertQuery.builder()
+            .table(TABLE)
+            .build()
+
+    override fun mapToUpdateQuery(obj: Category) = UpdateQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+
+    override fun mapToContentValues(obj: Category) = ContentValues(4).apply {
+        put(COL_ID, obj.id)
+        put(COL_NAME, obj.name)
+        put(COL_ORDER, obj.order)
+        put(COL_FLAGS, obj.flags)
+    }
+}
+
+class CategoryGetResolver : DefaultGetResolver<Category>() {
+
+    override fun mapFromCursor(cursor: Cursor): Category = CategoryImpl().apply {
+        id = cursor.getInt(cursor.getColumnIndex(COL_ID))
+        name = cursor.getString(cursor.getColumnIndex(COL_NAME))
+        order = cursor.getInt(cursor.getColumnIndex(COL_ORDER))
+        flags = cursor.getInt(cursor.getColumnIndex(COL_FLAGS))
+    }
+}
+
+class CategoryDeleteResolver : DefaultDeleteResolver<Category>() {
+
+    override fun mapToDeleteQuery(obj: Category) = DeleteQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/ChapterTypeMapping.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/ChapterTypeMapping.kt
@ -0,0 +1,88 @@
+package eu.kanade.tachiyomi.data.database.mappers
+
+import android.content.ContentValues
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.SQLiteTypeMapping
+import com.pushtorefresh.storio.sqlite.operations.delete.DefaultDeleteResolver
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import com.pushtorefresh.storio.sqlite.operations.put.DefaultPutResolver
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.InsertQuery
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.ChapterImpl
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_BOOKMARK
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_CHAPTER_NUMBER
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_DATE_FETCH
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_DATE_UPLOAD
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_ID
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_LAST_PAGE_READ
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_MANGA_ID
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_NAME
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_READ
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_SCANLATOR
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_SOURCE_ORDER
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.COL_URL
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable.TABLE
+
+class ChapterTypeMapping : SQLiteTypeMapping<Chapter>(
+        ChapterPutResolver(),
+        ChapterGetResolver(),
+        ChapterDeleteResolver()
+)
+
+class ChapterPutResolver : DefaultPutResolver<Chapter>() {
+
+    override fun mapToInsertQuery(obj: Chapter) = InsertQuery.builder()
+            .table(TABLE)
+            .build()
+
+    override fun mapToUpdateQuery(obj: Chapter) = UpdateQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+
+    override fun mapToContentValues(obj: Chapter) = ContentValues(11).apply {
+        put(COL_ID, obj.id)
+        put(COL_MANGA_ID, obj.manga_id)
+        put(COL_URL, obj.url)
+        put(COL_NAME, obj.name)
+        put(COL_READ, obj.read)
+        put(COL_SCANLATOR, obj.scanlator)
+        put(COL_BOOKMARK, obj.bookmark)
+        put(COL_DATE_FETCH, obj.date_fetch)
+        put(COL_DATE_UPLOAD, obj.date_upload)
+        put(COL_LAST_PAGE_READ, obj.last_page_read)
+        put(COL_CHAPTER_NUMBER, obj.chapter_number)
+        put(COL_SOURCE_ORDER, obj.source_order)
+    }
+}
+
+class ChapterGetResolver : DefaultGetResolver<Chapter>() {
+
+    override fun mapFromCursor(cursor: Cursor): Chapter = ChapterImpl().apply {
+        id = cursor.getLong(cursor.getColumnIndex(COL_ID))
+        manga_id = cursor.getLong(cursor.getColumnIndex(COL_MANGA_ID))
+        url = cursor.getString(cursor.getColumnIndex(COL_URL))
+        name = cursor.getString(cursor.getColumnIndex(COL_NAME))
+        scanlator = cursor.getString(cursor.getColumnIndex(COL_SCANLATOR))
+        read = cursor.getInt(cursor.getColumnIndex(COL_READ)) == 1
+        bookmark = cursor.getInt(cursor.getColumnIndex(COL_BOOKMARK)) == 1
+        date_fetch = cursor.getLong(cursor.getColumnIndex(COL_DATE_FETCH))
+        date_upload = cursor.getLong(cursor.getColumnIndex(COL_DATE_UPLOAD))
+        last_page_read = cursor.getInt(cursor.getColumnIndex(COL_LAST_PAGE_READ))
+        chapter_number = cursor.getFloat(cursor.getColumnIndex(COL_CHAPTER_NUMBER))
+        source_order = cursor.getInt(cursor.getColumnIndex(COL_SOURCE_ORDER))
+    }
+}
+
+class ChapterDeleteResolver : DefaultDeleteResolver<Chapter>() {
+
+    override fun mapToDeleteQuery(obj: Chapter) = DeleteQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+}
+
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/HistoryTypeMapping.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/HistoryTypeMapping.kt
@ -0,0 +1,63 @@
+package eu.kanade.tachiyomi.data.database.mappers
+
+import android.content.ContentValues
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.SQLiteTypeMapping
+import com.pushtorefresh.storio.sqlite.operations.delete.DefaultDeleteResolver
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import com.pushtorefresh.storio.sqlite.operations.put.DefaultPutResolver
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.InsertQuery
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.models.History
+import eu.kanade.tachiyomi.data.database.models.HistoryImpl
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable.COL_CHAPTER_ID
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable.COL_ID
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable.COL_LAST_READ
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable.COL_TIME_READ
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable.TABLE
+
+class HistoryTypeMapping : SQLiteTypeMapping<History>(
+        HistoryPutResolver(),
+        HistoryGetResolver(),
+        HistoryDeleteResolver()
+)
+
+open class HistoryPutResolver : DefaultPutResolver<History>() {
+
+    override fun mapToInsertQuery(obj: History) = InsertQuery.builder()
+            .table(TABLE)
+            .build()
+
+    override fun mapToUpdateQuery(obj: History) = UpdateQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+
+    override fun mapToContentValues(obj: History) = ContentValues(4).apply {
+        put(COL_ID, obj.id)
+        put(COL_CHAPTER_ID, obj.chapter_id)
+        put(COL_LAST_READ, obj.last_read)
+        put(COL_TIME_READ, obj.time_read)
+    }
+}
+
+class HistoryGetResolver : DefaultGetResolver<History>() {
+
+    override fun mapFromCursor(cursor: Cursor): History = HistoryImpl().apply {
+        id = cursor.getLong(cursor.getColumnIndex(COL_ID))
+        chapter_id = cursor.getLong(cursor.getColumnIndex(COL_CHAPTER_ID))
+        last_read = cursor.getLong(cursor.getColumnIndex(COL_LAST_READ))
+        time_read = cursor.getLong(cursor.getColumnIndex(COL_TIME_READ))
+    }
+}
+
+class HistoryDeleteResolver : DefaultDeleteResolver<History>() {
+
+    override fun mapToDeleteQuery(obj: History) = DeleteQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/MangaCategoryTypeMapping.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/MangaCategoryTypeMapping.kt
@ -0,0 +1,59 @@
+package eu.kanade.tachiyomi.data.database.mappers
+
+import android.content.ContentValues
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.SQLiteTypeMapping
+import com.pushtorefresh.storio.sqlite.operations.delete.DefaultDeleteResolver
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import com.pushtorefresh.storio.sqlite.operations.put.DefaultPutResolver
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.InsertQuery
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.models.MangaCategory
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable.COL_CATEGORY_ID
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable.COL_ID
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable.COL_MANGA_ID
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable.TABLE
+
+class MangaCategoryTypeMapping : SQLiteTypeMapping<MangaCategory>(
+        MangaCategoryPutResolver(),
+        MangaCategoryGetResolver(),
+        MangaCategoryDeleteResolver()
+)
+
+class MangaCategoryPutResolver : DefaultPutResolver<MangaCategory>() {
+
+    override fun mapToInsertQuery(obj: MangaCategory) = InsertQuery.builder()
+            .table(TABLE)
+            .build()
+
+    override fun mapToUpdateQuery(obj: MangaCategory) = UpdateQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+
+    override fun mapToContentValues(obj: MangaCategory) = ContentValues(3).apply {
+        put(COL_ID, obj.id)
+        put(COL_MANGA_ID, obj.manga_id)
+        put(COL_CATEGORY_ID, obj.category_id)
+    }
+}
+
+class MangaCategoryGetResolver : DefaultGetResolver<MangaCategory>() {
+
+    override fun mapFromCursor(cursor: Cursor): MangaCategory = MangaCategory().apply {
+        id = cursor.getLong(cursor.getColumnIndex(COL_ID))
+        manga_id = cursor.getLong(cursor.getColumnIndex(COL_MANGA_ID))
+        category_id = cursor.getInt(cursor.getColumnIndex(COL_CATEGORY_ID))
+    }
+}
+
+class MangaCategoryDeleteResolver : DefaultDeleteResolver<MangaCategory>() {
+
+    override fun mapToDeleteQuery(obj: MangaCategory) = DeleteQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/MangaTypeMapping.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/MangaTypeMapping.kt
@ -0,0 +1,96 @@
+package eu.kanade.tachiyomi.data.database.mappers
+
+import android.content.ContentValues
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.SQLiteTypeMapping
+import com.pushtorefresh.storio.sqlite.operations.delete.DefaultDeleteResolver
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import com.pushtorefresh.storio.sqlite.operations.put.DefaultPutResolver
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.InsertQuery
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.models.MangaImpl
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_ARTIST
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_AUTHOR
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_CHAPTER_FLAGS
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_DESCRIPTION
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_FAVORITE
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_GENRE
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_ID
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_INITIALIZED
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_LAST_UPDATE
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_SOURCE
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_STATUS
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_THUMBNAIL_URL
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_TITLE
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_URL
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.COL_VIEWER
+import eu.kanade.tachiyomi.data.database.tables.MangaTable.TABLE
+
+class MangaTypeMapping : SQLiteTypeMapping<Manga>(
+        MangaPutResolver(),
+        MangaGetResolver(),
+        MangaDeleteResolver()
+)
+
+class MangaPutResolver : DefaultPutResolver<Manga>() {
+
+    override fun mapToInsertQuery(obj: Manga) = InsertQuery.builder()
+            .table(TABLE)
+            .build()
+
+    override fun mapToUpdateQuery(obj: Manga) = UpdateQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+
+    override fun mapToContentValues(obj: Manga) = ContentValues(15).apply {
+        put(COL_ID, obj.id)
+        put(COL_SOURCE, obj.source)
+        put(COL_URL, obj.url)
+        put(COL_ARTIST, obj.artist)
+        put(COL_AUTHOR, obj.author)
+        put(COL_DESCRIPTION, obj.description)
+        put(COL_GENRE, obj.genre)
+        put(COL_TITLE, obj.title)
+        put(COL_STATUS, obj.status)
+        put(COL_THUMBNAIL_URL, obj.thumbnail_url)
+        put(COL_FAVORITE, obj.favorite)
+        put(COL_LAST_UPDATE, obj.last_update)
+        put(COL_INITIALIZED, obj.initialized)
+        put(COL_VIEWER, obj.viewer)
+        put(COL_CHAPTER_FLAGS, obj.chapter_flags)
+    }
+}
+
+open class MangaGetResolver : DefaultGetResolver<Manga>() {
+
+    override fun mapFromCursor(cursor: Cursor): Manga = MangaImpl().apply {
+        id = cursor.getLong(cursor.getColumnIndex(COL_ID))
+        source = cursor.getLong(cursor.getColumnIndex(COL_SOURCE))
+        url = cursor.getString(cursor.getColumnIndex(COL_URL))
+        artist = cursor.getString(cursor.getColumnIndex(COL_ARTIST))
+        author = cursor.getString(cursor.getColumnIndex(COL_AUTHOR))
+        description = cursor.getString(cursor.getColumnIndex(COL_DESCRIPTION))
+        genre = cursor.getString(cursor.getColumnIndex(COL_GENRE))
+        title = cursor.getString(cursor.getColumnIndex(COL_TITLE))
+        status = cursor.getInt(cursor.getColumnIndex(COL_STATUS))
+        thumbnail_url = cursor.getString(cursor.getColumnIndex(COL_THUMBNAIL_URL))
+        favorite = cursor.getInt(cursor.getColumnIndex(COL_FAVORITE)) == 1
+        last_update = cursor.getLong(cursor.getColumnIndex(COL_LAST_UPDATE))
+        initialized = cursor.getInt(cursor.getColumnIndex(COL_INITIALIZED)) == 1
+        viewer = cursor.getInt(cursor.getColumnIndex(COL_VIEWER))
+        chapter_flags = cursor.getInt(cursor.getColumnIndex(COL_CHAPTER_FLAGS))
+    }
+}
+
+class MangaDeleteResolver : DefaultDeleteResolver<Manga>() {
+
+    override fun mapToDeleteQuery(obj: Manga) = DeleteQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/TrackTypeMapping.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/mappers/TrackTypeMapping.kt
@ -0,0 +1,78 @@
+package eu.kanade.tachiyomi.data.database.mappers
+
+import android.content.ContentValues
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.SQLiteTypeMapping
+import com.pushtorefresh.storio.sqlite.operations.delete.DefaultDeleteResolver
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import com.pushtorefresh.storio.sqlite.operations.put.DefaultPutResolver
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.InsertQuery
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.models.Track
+import eu.kanade.tachiyomi.data.database.models.TrackImpl
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_ID
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_LAST_CHAPTER_READ
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_MANGA_ID
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_REMOTE_ID
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_SCORE
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_STATUS
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_SYNC_ID
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_TITLE
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.COL_TOTAL_CHAPTERS
+import eu.kanade.tachiyomi.data.database.tables.TrackTable.TABLE
+
+class TrackTypeMapping : SQLiteTypeMapping<Track>(
+        TrackPutResolver(),
+        TrackGetResolver(),
+        TrackDeleteResolver()
+)
+
+class TrackPutResolver : DefaultPutResolver<Track>() {
+
+    override fun mapToInsertQuery(obj: Track) = InsertQuery.builder()
+            .table(TABLE)
+            .build()
+
+    override fun mapToUpdateQuery(obj: Track) = UpdateQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+
+    override fun mapToContentValues(obj: Track) = ContentValues(9).apply {
+        put(COL_ID, obj.id)
+        put(COL_MANGA_ID, obj.manga_id)
+        put(COL_SYNC_ID, obj.sync_id)
+        put(COL_REMOTE_ID, obj.remote_id)
+        put(COL_TITLE, obj.title)
+        put(COL_LAST_CHAPTER_READ, obj.last_chapter_read)
+        put(COL_TOTAL_CHAPTERS, obj.total_chapters)
+        put(COL_STATUS, obj.status)
+        put(COL_SCORE, obj.score)
+    }
+}
+
+class TrackGetResolver : DefaultGetResolver<Track>() {
+
+    override fun mapFromCursor(cursor: Cursor): Track = TrackImpl().apply {
+        id = cursor.getLong(cursor.getColumnIndex(COL_ID))
+        manga_id = cursor.getLong(cursor.getColumnIndex(COL_MANGA_ID))
+        sync_id = cursor.getInt(cursor.getColumnIndex(COL_SYNC_ID))
+        remote_id = cursor.getInt(cursor.getColumnIndex(COL_REMOTE_ID))
+        title = cursor.getString(cursor.getColumnIndex(COL_TITLE))
+        last_chapter_read = cursor.getInt(cursor.getColumnIndex(COL_LAST_CHAPTER_READ))
+        total_chapters = cursor.getInt(cursor.getColumnIndex(COL_TOTAL_CHAPTERS))
+        status = cursor.getInt(cursor.getColumnIndex(COL_STATUS))
+        score = cursor.getFloat(cursor.getColumnIndex(COL_SCORE))
+    }
+}
+
+class TrackDeleteResolver : DefaultDeleteResolver<Track>() {
+
+    override fun mapToDeleteQuery(obj: Track) = DeleteQuery.builder()
+            .table(TABLE)
+            .where("$COL_ID = ?")
+            .whereArgs(obj.id)
+            .build()
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Category.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Category.java
@ -1,57 +0,0 @@
-package eu.kanade.tachiyomi.data.database.models;
-
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteColumn;
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteType;
-
-import java.io.Serializable;
-
-import eu.kanade.tachiyomi.data.database.tables.CategoryTable;
-
-@StorIOSQLiteType(table = CategoryTable.TABLE)
-public class Category implements Serializable {
-
-    @StorIOSQLiteColumn(name = CategoryTable.COLUMN_ID, key = true)
-    public Integer id;
-
-    @StorIOSQLiteColumn(name = CategoryTable.COLUMN_NAME)
-    public String name;
-
-    @StorIOSQLiteColumn(name = CategoryTable.COLUMN_ORDER)
-    public int order;
-
-    @StorIOSQLiteColumn(name = CategoryTable.COLUMN_FLAGS)
-    public int flags;
-
-    public Category() {}
-
-    public static Category create(String name) {
-        Category c = new Category();
-        c.name = name;
-        return c;
-    }
-
-    public static Category createDefault() {
-        Category c = create("Default");
-        c.id = 0;
-        return c;
-    }
-
-    public String getNameLower() {
-        return name.toLowerCase();
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-
-        Category category = (Category) o;
-
-        return name.equals(category.name);
-    }
-
-    @Override
-    public int hashCode() {
-        return name.hashCode();
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Category.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Category.kt
@ -0,0 +1,27 @@
+package eu.kanade.tachiyomi.data.database.models
+
+import java.io.Serializable
+
+interface Category : Serializable {
+
+    var id: Int?
+
+    var name: String
+
+    var order: Int
+
+    var flags: Int
+
+    val nameLower: String
+        get() = name.toLowerCase()
+
+    companion object {
+
+        fun create(name: String): Category = CategoryImpl().apply {
+            this.name = name
+        }
+
+        fun createDefault(): Category = create("Default").apply { id = 0 }
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/CategoryImpl.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/CategoryImpl.kt
@ -0,0 +1,26 @@
+package eu.kanade.tachiyomi.data.database.models
+
+class CategoryImpl : Category {
+
+    override var id: Int? = null
+
+    override lateinit var name: String
+
+    override var order: Int = 0
+
+    override var flags: Int = 0
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || javaClass != other.javaClass) return false
+
+        val category = other as Category
+
+        return name == category.name
+    }
+
+    override fun hashCode(): Int {
+        return name.hashCode()
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.java
@ -1,87 +0,0 @@
-package eu.kanade.tachiyomi.data.database.models;
-
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteColumn;
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteType;
-
-import java.io.Serializable;
-import java.util.List;
-
-import eu.kanade.tachiyomi.data.database.tables.ChapterTable;
-import eu.kanade.tachiyomi.data.download.model.Download;
-import eu.kanade.tachiyomi.data.source.model.Page;
-import eu.kanade.tachiyomi.util.UrlUtil;
-
-@StorIOSQLiteType(table = ChapterTable.TABLE)
-public class Chapter implements Serializable {
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_ID, key = true)
-    public Long id;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_MANGA_ID)
-    public Long manga_id;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_URL)
-    public String url;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_NAME)
-    public String name;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_READ)
-    public boolean read;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_LAST_PAGE_READ)
-    public int last_page_read;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_DATE_FETCH)
-    public long date_fetch;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_DATE_UPLOAD)
-    public long date_upload;
-
-    @StorIOSQLiteColumn(name = ChapterTable.COLUMN_CHAPTER_NUMBER)
-    public float chapter_number;
-
-    public int status;
-
-    private transient List<Page> pages;
-
-    public Chapter() {}
-
-    public void setUrl(String url) {
-        this.url = UrlUtil.getPath(url);
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-
-        Chapter chapter = (Chapter) o;
-
-        return url.equals(chapter.url);
-
-    }
-
-    @Override
-    public int hashCode() {
-        return url.hashCode();
-    }
-
-    public static Chapter create() {
-        Chapter chapter = new Chapter();
-        chapter.chapter_number = -1;
-        return chapter;
-    }
-
-    public List<Page> getPages() {
-        return pages;
-    }
-
-    public void setPages(List<Page> pages) {
-        this.pages = pages;
-    }
-
-    public boolean isDownloaded() {
-        return status == Download.DOWNLOADED;
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.kt
@ -0,0 +1,31 @@
+package eu.kanade.tachiyomi.data.database.models
+
+import eu.kanade.tachiyomi.source.model.SChapter
+import java.io.Serializable
+
+interface Chapter : SChapter, Serializable {
+
+    var id: Long?
+
+    var manga_id: Long?
+
+    var read: Boolean
+
+    var bookmark: Boolean
+
+    var last_page_read: Int
+
+    var date_fetch: Long
+
+    var source_order: Int
+
+    val isRecognizedNumber: Boolean
+        get() = chapter_number >= 0f
+
+    companion object {
+
+        fun create(): Chapter = ChapterImpl().apply {
+            chapter_number = -1f
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/ChapterImpl.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/ChapterImpl.kt
@ -0,0 +1,41 @@
+package eu.kanade.tachiyomi.data.database.models
+
+class ChapterImpl : Chapter {
+
+    override var id: Long? = null
+
+    override var manga_id: Long? = null
+
+    override lateinit var url: String
+
+    override lateinit var name: String
+
+    override var scanlator: String? = null
+
+    override var read: Boolean = false
+
+    override var bookmark: Boolean = false
+
+    override var last_page_read: Int = 0
+
+    override var date_fetch: Long = 0
+
+    override var date_upload: Long = 0
+
+    override var chapter_number: Float = 0f
+
+    override var source_order: Int = 0
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || javaClass != other.javaClass) return false
+
+        val chapter = other as Chapter
+        return url == chapter.url
+    }
+
+    override fun hashCode(): Int {
+        return url.hashCode()
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/History.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/History.kt
@ -0,0 +1,42 @@
+package eu.kanade.tachiyomi.data.database.models
+
+import java.io.Serializable
+
+/**
+ * Object containing the history statistics of a chapter
+ */
+interface History : Serializable {
+
+    /**
+     * Id of history object.
+     */
+    var id: Long?
+
+    /**
+     * Chapter id of history object.
+     */
+    var chapter_id: Long
+
+    /**
+     * Last time chapter was read in time long format
+     */
+    var last_read: Long
+
+    /**
+     * Total time chapter was read - todo not yet implemented
+     */
+    var time_read: Long
+
+    companion object {
+
+        /**
+         * History constructor
+         *
+         * @param chapter chapter object
+         * @return history object
+         */
+        fun create(chapter: Chapter): History =  HistoryImpl().apply {
+            this.chapter_id = chapter.id!!
+        }
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/HistoryImpl.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/HistoryImpl.kt
@ -0,0 +1,27 @@
+package eu.kanade.tachiyomi.data.database.models
+
+/**
+ * Object containing the history statistics of a chapter
+ */
+class HistoryImpl : History {
+
+    /**
+     * Id of history object.
+     */
+    override var id: Long? = null
+
+    /**
+     * Chapter id of history object.
+     */
+    override var chapter_id: Long = 0
+
+    /**
+     * Last time chapter was read in time long format
+     */
+    override var last_read: Long = 0
+
+    /**
+     * Total time chapter was read - todo not yet implemented
+     */
+    override var time_read: Long = 0
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.java
@ -1,201 +0,0 @@
-package eu.kanade.tachiyomi.data.database.models;
-
-import android.content.Context;
-
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteColumn;
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteType;
-
-import java.io.Serializable;
-
-import eu.kanade.tachiyomi.R;
-import eu.kanade.tachiyomi.data.database.tables.MangaTable;
-import eu.kanade.tachiyomi.util.UrlUtil;
-
-@StorIOSQLiteType(table = MangaTable.TABLE)
-public class Manga implements Serializable {
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_ID, key = true)
-    public Long id;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_SOURCE)
-    public int source;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_URL)
-    public String url;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_ARTIST)
-    public String artist;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_AUTHOR)
-    public String author;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_DESCRIPTION)
-    public String description;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_GENRE)
-    public String genre;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_TITLE)
-    public String title;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_STATUS)
-    public int status;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_THUMBNAIL_URL)
-    public String thumbnail_url;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_FAVORITE)
-    public boolean favorite;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_LAST_UPDATE)
-    public long last_update;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_INITIALIZED)
-    public boolean initialized;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_VIEWER)
-    public int viewer;
-
-    @StorIOSQLiteColumn(name = MangaTable.COLUMN_CHAPTER_FLAGS)
-    public int chapter_flags;
-
-    public transient int unread;
-
-    public transient int category;
-
-    public static final int UNKNOWN = 0;
-    public static final int ONGOING = 1;
-    public static final int COMPLETED = 2;
-    public static final int LICENSED = 3;
-
-    public static final int SORT_AZ   = 0x00000000;
-    public static final int SORT_ZA   = 0x00000001;
-    public static final int SORT_MASK = 0x00000001;
-
-    public static final int SHOW_UNREAD = 0x00000002;
-    public static final int SHOW_READ   = 0x00000004;
-    public static final int READ_MASK   = 0x00000006;
-
-    public static final int SHOW_DOWNLOADED     = 0x00000008;
-    public static final int SHOW_NOT_DOWNLOADED = 0x00000010;
-    public static final int DOWNLOADED_MASK     = 0x00000018;
-
-    // Generic filter that does not filter anything
-    public static final int SHOW_ALL    = 0x00000000;
-
-    public static final int DISPLAY_NAME   = 0x00000000;
-    public static final int DISPLAY_NUMBER = 0x00100000;
-    public static final int DISPLAY_MASK   = 0x00100000;
-
-    public Manga() {}
-
-    public static Manga create(String pathUrl) {
-        Manga m = new Manga();
-        m.url = pathUrl;
-        return m;
-    }
-
-    public static Manga create(String pathUrl, int source) {
-        Manga m = new Manga();
-        m.url = pathUrl;
-        m.source = source;
-        return m;
-    }
-
-    public void setUrl(String url) {
-        this.url = UrlUtil.getPath(url);
-    }
-
-    public void copyFrom(Manga other) {
-        if (other.title != null)
-            title = other.title;
-
-        if (other.author != null)
-            author = other.author;
-
-        if (other.artist != null)
-            artist = other.artist;
-
-        if (other.url != null)
-            url = other.url;
-
-        if (other.description != null)
-            description = other.description;
-
-        if (other.genre != null)
-            genre = other.genre;
-
-        if (other.thumbnail_url != null)
-            thumbnail_url = other.thumbnail_url;
-
-        status = other.status;
-
-        initialized = true;
-    }
-
-    public String getStatus(Context context) {
-        switch (status) {
-            case ONGOING:
-                return context.getString(R.string.ongoing);
-            case COMPLETED:
-                return context.getString(R.string.completed);
-            case LICENSED:
-                return context.getString(R.string.licensed);
-            default:
-                return context.getString(R.string.unknown);
-        }
-    }
-
-    public void setChapterOrder(int order) {
-        setFlags(order, SORT_MASK);
-    }
-
-    public void setDisplayMode(int mode) {
-        setFlags(mode, DISPLAY_MASK);
-    }
-
-    public void setReadFilter(int filter) {
-        setFlags(filter, READ_MASK);
-    }
-
-    public void setDownloadedFilter(int filter) {
-        setFlags(filter, DOWNLOADED_MASK);
-    }
-
-    private void setFlags(int flag, int mask) {
-        chapter_flags = (chapter_flags & ~mask) | (flag & mask);
-    }
-
-    public boolean sortChaptersAZ() {
-        return (chapter_flags & SORT_MASK) == SORT_AZ;
-    }
-
-    // Used to display the chapter's title one way or another
-    public int getDisplayMode() {
-        return chapter_flags & DISPLAY_MASK;
-    }
-
-    public int getReadFilter() {
-        return chapter_flags & READ_MASK;
-    }
-
-    public int getDownloadedFilter() {
-        return chapter_flags & DOWNLOADED_MASK;
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-
-        Manga manga = (Manga) o;
-
-        return url.equals(manga.url);
-
-    }
-
-    @Override
-    public int hashCode() {
-        return url.hashCode();
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.kt
@ -0,0 +1,96 @@
+package eu.kanade.tachiyomi.data.database.models
+
+import eu.kanade.tachiyomi.source.model.SManga
+
+interface Manga : SManga {
+
+    var id: Long?
+
+    var source: Long
+
+    var favorite: Boolean
+
+    var last_update: Long
+
+    var viewer: Int
+
+    var chapter_flags: Int
+
+    var unread: Int
+
+    var category: Int
+
+    fun setChapterOrder(order: Int) {
+        setFlags(order, SORT_MASK)
+    }
+
+    private fun setFlags(flag: Int, mask: Int) {
+        chapter_flags = chapter_flags and mask.inv() or (flag and mask)
+    }
+
+    fun sortDescending(): Boolean {
+        return chapter_flags and SORT_MASK == SORT_DESC
+    }
+
+    // Used to display the chapter's title one way or another
+    var displayMode: Int
+        get() = chapter_flags and DISPLAY_MASK
+        set(mode) = setFlags(mode, DISPLAY_MASK)
+
+    var readFilter: Int
+        get() = chapter_flags and READ_MASK
+        set(filter) = setFlags(filter, READ_MASK)
+
+    var downloadedFilter: Int
+        get() = chapter_flags and DOWNLOADED_MASK
+        set(filter) = setFlags(filter, DOWNLOADED_MASK)
+
+    var bookmarkedFilter: Int
+        get() = chapter_flags and BOOKMARKED_MASK
+        set(filter) = setFlags(filter, BOOKMARKED_MASK)
+
+    var sorting: Int
+        get() = chapter_flags and SORTING_MASK
+        set(sort) = setFlags(sort, SORTING_MASK)
+
+    companion object {
+
+        const val SORT_DESC = 0x00000000
+        const val SORT_ASC = 0x00000001
+        const val SORT_MASK = 0x00000001
+
+        // Generic filter that does not filter anything
+        const val SHOW_ALL = 0x00000000
+
+        const val SHOW_UNREAD = 0x00000002
+        const val SHOW_READ = 0x00000004
+        const val READ_MASK = 0x00000006
+
+        const val SHOW_DOWNLOADED = 0x00000008
+        const val SHOW_NOT_DOWNLOADED = 0x00000010
+        const val DOWNLOADED_MASK = 0x00000018
+
+        const val SHOW_BOOKMARKED = 0x00000020
+        const val SHOW_NOT_BOOKMARKED = 0x00000040
+        const val BOOKMARKED_MASK = 0x00000060
+
+        const val SORTING_SOURCE = 0x00000000
+        const val SORTING_NUMBER = 0x00000100
+        const val SORTING_MASK = 0x00000100
+
+        const val DISPLAY_NAME = 0x00000000
+        const val DISPLAY_NUMBER = 0x00100000
+        const val DISPLAY_MASK = 0x00100000
+
+        fun create(source: Long): Manga = MangaImpl().apply {
+            this.source = source
+        }
+
+        fun create(pathUrl: String, title: String, source: Long = 0): Manga = MangaImpl().apply {
+            url = pathUrl
+            this.title = title
+            this.source = source
+        }
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaCategory.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaCategory.java
@ -1,29 +0,0 @@
-package eu.kanade.tachiyomi.data.database.models;
-
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteColumn;
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteType;
-
-import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable;
-
-@StorIOSQLiteType(table = MangaCategoryTable.TABLE)
-public class MangaCategory {
-
-    @StorIOSQLiteColumn(name = MangaCategoryTable.COLUMN_ID, key = true)
-    public Long id;
-
-    @StorIOSQLiteColumn(name = MangaCategoryTable.COLUMN_MANGA_ID)
-    public long manga_id;
-
-    @StorIOSQLiteColumn(name = MangaCategoryTable.COLUMN_CATEGORY_ID)
-    public int category_id;
-
-    public MangaCategory() {}
-
-    public static MangaCategory create(Manga manga, Category category) {
-        MangaCategory mc = new MangaCategory();
-        mc.manga_id = manga.id;
-        mc.category_id = category.id;
-        return mc;
-    }
-
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaCategory.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaCategory.kt
@ -0,0 +1,21 @@
+package eu.kanade.tachiyomi.data.database.models
+
+class MangaCategory {
+
+    var id: Long? = null
+
+    var manga_id: Long = 0
+
+    var category_id: Int = 0
+
+    companion object {
+
+        fun create(manga: Manga, category: Category): MangaCategory {
+            val mc = MangaCategory()
+            mc.manga_id = manga.id!!
+            mc.category_id = category.id!!
+            return mc
+        }
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaChapter.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaChapter.java
@ -1,12 +0,0 @@
-package eu.kanade.tachiyomi.data.database.models;
-
-public class MangaChapter {
-
-    public Manga manga;
-    public Chapter chapter;
-
-    public MangaChapter(Manga manga, Chapter chapter) {
-        this.manga = manga;
-        this.chapter = chapter;
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaChapter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaChapter.kt
@ -0,0 +1,3 @@
+package eu.kanade.tachiyomi.data.database.models
+
+class MangaChapter(val manga: Manga, val chapter: Chapter)
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaChapterHistory.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaChapterHistory.kt
@ -0,0 +1,10 @@
+package eu.kanade.tachiyomi.data.database.models
+
+/**
+ * Object containing manga, chapter and history
+ *
+ * @param manga object containing manga
+ * @param chapter object containing chater
+ * @param history      object containing history
+ */
+data class MangaChapterHistory(val manga: Manga, val chapter: Chapter, val history: History)
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaImpl.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaImpl.kt
@ -0,0 +1,53 @@
+package eu.kanade.tachiyomi.data.database.models
+
+class MangaImpl : Manga {
+
+    override var id: Long? = null
+
+    override var source: Long = -1
+
+    override lateinit var url: String
+
+    override lateinit var title: String
+
+    override var artist: String? = null
+
+    override var author: String? = null
+
+    override var description: String? = null
+
+    override var genre: String? = null
+
+    override var status: Int = 0
+
+    override var thumbnail_url: String? = null
+
+    override var favorite: Boolean = false
+
+    override var last_update: Long = 0
+
+    override var initialized: Boolean = false
+
+    override var viewer: Int = 0
+
+    override var chapter_flags: Int = 0
+
+    @Transient override var unread: Int = 0
+
+    @Transient override var category: Int = 0
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || javaClass != other.javaClass) return false
+
+        val manga = other as Manga
+
+        return url == manga.url
+
+    }
+
+    override fun hashCode(): Int {
+        return url.hashCode()
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaSync.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/MangaSync.java
@ -1,78 +0,0 @@
-package eu.kanade.tachiyomi.data.database.models;
-
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteColumn;
-import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteType;
-
-import java.io.Serializable;
-
-import eu.kanade.tachiyomi.data.database.tables.MangaSyncTable;
-import eu.kanade.tachiyomi.data.mangasync.base.MangaSyncService;
-
-@StorIOSQLiteType(table = MangaSyncTable.TABLE)
-public class MangaSync implements Serializable {
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_ID, key = true)
-    public Long id;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_MANGA_ID)
-    public long manga_id;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_SYNC_ID)
-    public int sync_id;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_REMOTE_ID)
-    public int remote_id;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_TITLE)
-    public String title;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_LAST_CHAPTER_READ)
-    public int last_chapter_read;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_TOTAL_CHAPTERS)
-    public int total_chapters;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_SCORE)
-    public float score;
-
-    @StorIOSQLiteColumn(name = MangaSyncTable.COLUMN_STATUS)
-    public int status;
-
-    public boolean update;
-
-    public static MangaSync create() {
-        return new MangaSync();
-    }
-
-    public static MangaSync create(MangaSyncService service) {
-        MangaSync mangasync = new MangaSync();
-        mangasync.sync_id = service.getId();
-        return mangasync;
-    }
-
-    public void copyPersonalFrom(MangaSync other) {
-        last_chapter_read = other.last_chapter_read;
-        score = other.score;
-        status = other.status;
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-
-        MangaSync mangaSync = (MangaSync) o;
-
-        if (manga_id != mangaSync.manga_id) return false;
-        if (sync_id != mangaSync.sync_id) return false;
-        return remote_id == mangaSync.remote_id;
-    }
-
-    @Override
-    public int hashCode() {
-        int result = (int) (manga_id ^ (manga_id >>> 32));
-        result = 31 * result + sync_id;
-        result = 31 * result + remote_id;
-        return result;
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Track.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/Track.kt
@ -0,0 +1,38 @@
+package eu.kanade.tachiyomi.data.database.models
+
+import java.io.Serializable
+
+interface Track : Serializable {
+
+    var id: Long?
+
+    var manga_id: Long
+
+    var sync_id: Int
+
+    var remote_id: Int
+
+    var title: String
+
+    var last_chapter_read: Int
+
+    var total_chapters: Int
+
+    var score: Float
+
+    var status: Int
+
+    fun copyPersonalFrom(other: Track) {
+        last_chapter_read = other.last_chapter_read
+        score = other.score
+        status = other.status
+    }
+
+    companion object {
+
+        fun create(serviceId: Int): Track = TrackImpl().apply {
+            sync_id = serviceId
+        }
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/models/TrackImpl.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/models/TrackImpl.kt
@ -0,0 +1,41 @@
+package eu.kanade.tachiyomi.data.database.models
+
+class TrackImpl : Track {
+
+    override var id: Long? = null
+
+    override var manga_id: Long = 0
+
+    override var sync_id: Int = 0
+
+    override var remote_id: Int = 0
+
+    override lateinit var title: String
+
+    override var last_chapter_read: Int = 0
+
+    override var total_chapters: Int = 0
+
+    override var score: Float = 0f
+
+    override var status: Int = 0
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || javaClass != other.javaClass) return false
+
+        other as Track
+
+        if (manga_id != other.manga_id) return false
+        if (sync_id != other.sync_id) return false
+        return remote_id == other.remote_id
+    }
+
+    override fun hashCode(): Int {
+        var result = (manga_id xor manga_id.ushr(32)).toInt()
+        result = 31 * result + sync_id
+        result = 31 * result + remote_id
+        return result
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/CategoryQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/CategoryQueries.kt
@ -0,0 +1,36 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import com.pushtorefresh.storio.sqlite.queries.Query
+import com.pushtorefresh.storio.sqlite.queries.RawQuery
+import eu.kanade.tachiyomi.data.database.DbProvider
+import eu.kanade.tachiyomi.data.database.models.Category
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable
+
+interface CategoryQueries : DbProvider {
+
+    fun getCategories() = db.get()
+            .listOfObjects(Category::class.java)
+            .withQuery(Query.builder()
+                    .table(CategoryTable.TABLE)
+                    .orderBy(CategoryTable.COL_ORDER)
+                    .build())
+            .prepare()
+
+    fun getCategoriesForManga(manga: Manga) = db.get()
+            .listOfObjects(Category::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getCategoriesForMangaQuery())
+                    .args(manga.id)
+                    .build())
+            .prepare()
+
+    fun insertCategory(category: Category) = db.put().`object`(category).prepare()
+
+    fun insertCategories(categories: List<Category>) = db.put().objects(categories).prepare()
+
+    fun deleteCategory(category: Category) = db.delete().`object`(category).prepare()
+
+    fun deleteCategories(categories: List<Category>) = db.delete().objects(categories).prepare()
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/ChapterQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/ChapterQueries.kt
@ -0,0 +1,84 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import com.pushtorefresh.storio.sqlite.queries.Query
+import com.pushtorefresh.storio.sqlite.queries.RawQuery
+import eu.kanade.tachiyomi.data.database.DbProvider
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.models.MangaChapter
+import eu.kanade.tachiyomi.data.database.resolvers.ChapterBackupPutResolver
+import eu.kanade.tachiyomi.data.database.resolvers.ChapterProgressPutResolver
+import eu.kanade.tachiyomi.data.database.resolvers.ChapterSourceOrderPutResolver
+import eu.kanade.tachiyomi.data.database.resolvers.MangaChapterGetResolver
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable
+import java.util.*
+
+interface ChapterQueries : DbProvider {
+
+    fun getChapters(manga: Manga) = db.get()
+            .listOfObjects(Chapter::class.java)
+            .withQuery(Query.builder()
+                    .table(ChapterTable.TABLE)
+                    .where("${ChapterTable.COL_MANGA_ID} = ?")
+                    .whereArgs(manga.id)
+                    .build())
+            .prepare()
+
+    fun getRecentChapters(date: Date) = db.get()
+            .listOfObjects(MangaChapter::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getRecentsQuery())
+                    .args(date.time)
+                    .observesTables(ChapterTable.TABLE)
+                    .build())
+            .withGetResolver(MangaChapterGetResolver.INSTANCE)
+            .prepare()
+
+    fun getChapter(id: Long) = db.get()
+            .`object`(Chapter::class.java)
+            .withQuery(Query.builder()
+                    .table(ChapterTable.TABLE)
+                    .where("${ChapterTable.COL_ID} = ?")
+                    .whereArgs(id)
+                    .build())
+            .prepare()
+
+    fun getChapter(url: String) = db.get()
+            .`object`(Chapter::class.java)
+            .withQuery(Query.builder()
+                    .table(ChapterTable.TABLE)
+                    .where("${ChapterTable.COL_URL} = ?")
+                    .whereArgs(url)
+                    .build())
+            .prepare()
+
+
+    fun insertChapter(chapter: Chapter) = db.put().`object`(chapter).prepare()
+
+    fun insertChapters(chapters: List<Chapter>) = db.put().objects(chapters).prepare()
+
+    fun deleteChapter(chapter: Chapter) = db.delete().`object`(chapter).prepare()
+
+    fun deleteChapters(chapters: List<Chapter>) = db.delete().objects(chapters).prepare()
+
+    fun updateChaptersBackup(chapters: List<Chapter>) = db.put()
+            .objects(chapters)
+            .withPutResolver(ChapterBackupPutResolver())
+            .prepare()
+
+    fun updateChapterProgress(chapter: Chapter) = db.put()
+            .`object`(chapter)
+            .withPutResolver(ChapterProgressPutResolver())
+            .prepare()
+
+    fun updateChaptersProgress(chapters: List<Chapter>) = db.put()
+            .objects(chapters)
+            .withPutResolver(ChapterProgressPutResolver())
+            .prepare()
+
+    fun fixChaptersSourceOrder(chapters: List<Chapter>) = db.put()
+            .objects(chapters)
+            .withPutResolver(ChapterSourceOrderPutResolver())
+            .prepare()
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/HistoryQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/HistoryQueries.kt
@ -0,0 +1,86 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.RawQuery
+import eu.kanade.tachiyomi.data.database.DbProvider
+import eu.kanade.tachiyomi.data.database.models.History
+import eu.kanade.tachiyomi.data.database.models.MangaChapterHistory
+import eu.kanade.tachiyomi.data.database.resolvers.HistoryLastReadPutResolver
+import eu.kanade.tachiyomi.data.database.resolvers.MangaChapterHistoryGetResolver
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable
+import java.util.*
+
+interface HistoryQueries : DbProvider {
+
+    /**
+     * Insert history into database
+     * @param history object containing history information
+     */
+    fun insertHistory(history: History) = db.put().`object`(history).prepare()
+
+    /**
+     * Returns history of recent manga containing last read chapter
+     * @param date recent date range
+     */
+    fun getRecentManga(date: Date) = db.get()
+            .listOfObjects(MangaChapterHistory::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getRecentMangasQuery())
+                    .args(date.time)
+                    .observesTables(HistoryTable.TABLE)
+                    .build())
+            .withGetResolver(MangaChapterHistoryGetResolver.INSTANCE)
+            .prepare()
+
+    fun getHistoryByMangaId(mangaId: Long) = db.get()
+            .listOfObjects(History::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getHistoryByMangaId())
+                    .args(mangaId)
+                    .observesTables(HistoryTable.TABLE)
+                    .build())
+            .prepare()
+
+    fun getHistoryByChapterUrl(chapterUrl: String) = db.get()
+            .`object`(History::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getHistoryByChapterUrl())
+                    .args(chapterUrl)
+                    .observesTables(HistoryTable.TABLE)
+                    .build())
+            .prepare()
+
+    /**
+     * Updates the history last read.
+     * Inserts history object if not yet in database
+     * @param history history object
+     */
+    fun updateHistoryLastRead(history: History) = db.put()
+            .`object`(history)
+            .withPutResolver(HistoryLastReadPutResolver())
+            .prepare()
+
+    /**
+     * Updates the history last read.
+     * Inserts history object if not yet in database
+     * @param historyList history object list
+     */
+    fun updateHistoryLastRead(historyList: List<History>) = db.put()
+            .objects(historyList)
+            .withPutResolver(HistoryLastReadPutResolver())
+            .prepare()
+
+    fun deleteHistory() = db.delete()
+            .byQuery(DeleteQuery.builder()
+                    .table(HistoryTable.TABLE)
+                    .build())
+            .prepare()
+
+    fun deleteHistoryNoLastRead() = db.delete()
+            .byQuery(DeleteQuery.builder()
+                    .table(HistoryTable.TABLE)
+                    .where("${HistoryTable.COL_LAST_READ} = ?")
+                    .whereArgs(0)
+                    .build())
+            .prepare()
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/MangaCategoryQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/MangaCategoryQueries.kt
@ -0,0 +1,32 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import com.pushtorefresh.storio.Queries
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import eu.kanade.tachiyomi.data.database.DbProvider
+import eu.kanade.tachiyomi.data.database.inTransaction
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.models.MangaCategory
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable
+
+interface MangaCategoryQueries : DbProvider {
+
+    fun insertMangaCategory(mangaCategory: MangaCategory) = db.put().`object`(mangaCategory).prepare()
+
+    fun insertMangasCategories(mangasCategories: List<MangaCategory>) = db.put().objects(mangasCategories).prepare()
+
+    fun deleteOldMangasCategories(mangas: List<Manga>) = db.delete()
+            .byQuery(DeleteQuery.builder()
+                    .table(MangaCategoryTable.TABLE)
+                    .where("${MangaCategoryTable.COL_MANGA_ID} IN (${Queries.placeholders(mangas.size)})")
+                    .whereArgs(*mangas.map { it.id }.toTypedArray())
+                    .build())
+            .prepare()
+
+    fun setMangaCategories(mangasCategories: List<MangaCategory>, mangas: List<Manga>) {
+        db.inTransaction {
+            deleteOldMangasCategories(mangas).executeAsBlocking()
+            insertMangasCategories(mangasCategories).executeAsBlocking()
+        }
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/MangaQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/MangaQueries.kt
@ -0,0 +1,104 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.Query
+import com.pushtorefresh.storio.sqlite.queries.RawQuery
+import eu.kanade.tachiyomi.data.database.DbProvider
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.resolvers.LibraryMangaGetResolver
+import eu.kanade.tachiyomi.data.database.resolvers.MangaFlagsPutResolver
+import eu.kanade.tachiyomi.data.database.resolvers.MangaLastUpdatedPutResolver
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable
+import eu.kanade.tachiyomi.data.database.tables.MangaTable
+
+interface MangaQueries : DbProvider {
+
+    fun getMangas() = db.get()
+            .listOfObjects(Manga::class.java)
+            .withQuery(Query.builder()
+                    .table(MangaTable.TABLE)
+                    .build())
+            .prepare()
+
+    fun getLibraryMangas() = db.get()
+            .listOfObjects(Manga::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(libraryQuery)
+                    .observesTables(MangaTable.TABLE, ChapterTable.TABLE, MangaCategoryTable.TABLE, CategoryTable.TABLE)
+                    .build())
+            .withGetResolver(LibraryMangaGetResolver.INSTANCE)
+            .prepare()
+
+    fun getFavoriteMangas() = db.get()
+            .listOfObjects(Manga::class.java)
+            .withQuery(Query.builder()
+                    .table(MangaTable.TABLE)
+                    .where("${MangaTable.COL_FAVORITE} = ?")
+                    .whereArgs(1)
+                    .orderBy(MangaTable.COL_TITLE)
+                    .build())
+            .prepare()
+
+    fun getManga(url: String, sourceId: Long) = db.get()
+            .`object`(Manga::class.java)
+            .withQuery(Query.builder()
+                    .table(MangaTable.TABLE)
+                    .where("${MangaTable.COL_URL} = ? AND ${MangaTable.COL_SOURCE} = ?")
+                    .whereArgs(url, sourceId)
+                    .build())
+            .prepare()
+
+    fun getManga(id: Long) = db.get()
+            .`object`(Manga::class.java)
+            .withQuery(Query.builder()
+                    .table(MangaTable.TABLE)
+                    .where("${MangaTable.COL_ID} = ?")
+                    .whereArgs(id)
+                    .build())
+            .prepare()
+
+    fun insertManga(manga: Manga) = db.put().`object`(manga).prepare()
+
+    fun insertMangas(mangas: List<Manga>) = db.put().objects(mangas).prepare()
+
+    fun updateFlags(manga: Manga) = db.put()
+            .`object`(manga)
+            .withPutResolver(MangaFlagsPutResolver())
+            .prepare()
+
+    fun updateLastUpdated(manga: Manga) = db.put()
+            .`object`(manga)
+            .withPutResolver(MangaLastUpdatedPutResolver())
+            .prepare()
+
+    fun deleteManga(manga: Manga) = db.delete().`object`(manga).prepare()
+
+    fun deleteMangas(mangas: List<Manga>) = db.delete().objects(mangas).prepare()
+
+    fun deleteMangasNotInLibrary() = db.delete()
+            .byQuery(DeleteQuery.builder()
+                    .table(MangaTable.TABLE)
+                    .where("${MangaTable.COL_FAVORITE} = ?")
+                    .whereArgs(0)
+                    .build())
+            .prepare()
+
+    fun deleteMangas() = db.delete()
+            .byQuery(DeleteQuery.builder()
+                    .table(MangaTable.TABLE)
+                    .build())
+            .prepare()
+
+    fun getLastReadManga() = db.get()
+            .listOfObjects(Manga::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getLastReadMangaQuery())
+                    .observesTables(MangaTable.TABLE)
+                    .build())
+            .prepare()
+
+    fun getTotalChapterManga() = db.get().listOfObjects(Manga::class.java)
+            .withQuery(RawQuery.builder().query(getTotalChapterMangaQuery()).observesTables(MangaTable.TABLE).build()).prepare();
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/RawQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/RawQueries.kt
@ -0,0 +1,113 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import eu.kanade.tachiyomi.data.database.tables.CategoryTable as Category
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable as Chapter
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable as History
+import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable as MangaCategory
+import eu.kanade.tachiyomi.data.database.tables.MangaTable as Manga
+
+/**
+ * Query to get the manga from the library, with their categories and unread count.
+ */
+val libraryQuery = """
+    SELECT M.*, COALESCE(MC.${MangaCategory.COL_CATEGORY_ID}, 0) AS ${Manga.COL_CATEGORY}
+    FROM (
+        SELECT ${Manga.TABLE}.*, COALESCE(C.unread, 0) AS ${Manga.COL_UNREAD}
+        FROM ${Manga.TABLE}
+        LEFT JOIN (
+            SELECT ${Chapter.COL_MANGA_ID}, COUNT(*) AS unread
+            FROM ${Chapter.TABLE}
+            WHERE ${Chapter.COL_READ} = 0
+            GROUP BY ${Chapter.COL_MANGA_ID}
+        ) AS C
+        ON ${Manga.COL_ID} = C.${Chapter.COL_MANGA_ID}
+        WHERE ${Manga.COL_FAVORITE} = 1
+        GROUP BY ${Manga.COL_ID}
+        ORDER BY ${Manga.COL_TITLE}
+    ) AS M
+    LEFT JOIN (
+        SELECT * FROM ${MangaCategory.TABLE}) AS MC
+        ON MC.${MangaCategory.COL_MANGA_ID} = M.${Manga.COL_ID}
+"""
+
+/**
+ * Query to get the recent chapters of manga from the library up to a date.
+ */
+fun getRecentsQuery() = """
+    SELECT ${Manga.TABLE}.${Manga.COL_URL} as mangaUrl, * FROM ${Manga.TABLE} JOIN ${Chapter.TABLE}
+    ON ${Manga.TABLE}.${Manga.COL_ID} = ${Chapter.TABLE}.${Chapter.COL_MANGA_ID}
+    WHERE ${Manga.COL_FAVORITE} = 1 AND ${Chapter.COL_DATE_UPLOAD} > ?
+    ORDER BY ${Chapter.COL_DATE_UPLOAD} DESC
+"""
+
+/**
+ * Query to get the recently read chapters of manga from the library up to a date.
+ * The max_last_read table contains the most recent chapters grouped by manga
+ * The select statement returns all information of chapters that have the same id as the chapter in max_last_read
+ * and are read after the given time period
+ * @return return limit is 25
+ */
+fun getRecentMangasQuery() = """
+    SELECT ${Manga.TABLE}.${Manga.COL_URL} as mangaUrl, ${Manga.TABLE}.*, ${Chapter.TABLE}.*, ${History.TABLE}.*
+    FROM ${Manga.TABLE}
+    JOIN ${Chapter.TABLE}
+    ON ${Manga.TABLE}.${Manga.COL_ID} = ${Chapter.TABLE}.${Chapter.COL_MANGA_ID}
+    JOIN ${History.TABLE}
+    ON ${Chapter.TABLE}.${Chapter.COL_ID} = ${History.TABLE}.${History.COL_CHAPTER_ID}
+    JOIN (
+    SELECT ${Chapter.TABLE}.${Chapter.COL_MANGA_ID},${Chapter.TABLE}.${Chapter.COL_ID} as ${History.COL_CHAPTER_ID}, MAX(${History.TABLE}.${History.COL_LAST_READ}) as ${History.COL_LAST_READ}
+    FROM ${Chapter.TABLE} JOIN ${History.TABLE}
+    ON ${Chapter.TABLE}.${Chapter.COL_ID} = ${History.TABLE}.${History.COL_CHAPTER_ID}
+    GROUP BY ${Chapter.TABLE}.${Chapter.COL_MANGA_ID}) AS max_last_read
+    ON ${Chapter.TABLE}.${Chapter.COL_MANGA_ID} = max_last_read.${Chapter.COL_MANGA_ID}
+    WHERE ${History.TABLE}.${History.COL_LAST_READ} > ? AND max_last_read.${History.COL_CHAPTER_ID} = ${History.TABLE}.${History.COL_CHAPTER_ID}
+    ORDER BY max_last_read.${History.COL_LAST_READ} DESC
+    LIMIT 25
+"""
+
+fun getHistoryByMangaId() = """
+    SELECT ${History.TABLE}.*
+    FROM ${History.TABLE}
+    JOIN ${Chapter.TABLE}
+    ON ${History.TABLE}.${History.COL_CHAPTER_ID} = ${Chapter.TABLE}.${Chapter.COL_ID}
+    WHERE ${Chapter.TABLE}.${Chapter.COL_MANGA_ID} = ? AND ${History.TABLE}.${History.COL_CHAPTER_ID} = ${Chapter.TABLE}.${Chapter.COL_ID}
+"""
+
+fun getHistoryByChapterUrl() = """
+    SELECT ${History.TABLE}.*
+    FROM ${History.TABLE}
+    JOIN ${Chapter.TABLE}
+    ON ${History.TABLE}.${History.COL_CHAPTER_ID} = ${Chapter.TABLE}.${Chapter.COL_ID}
+    WHERE ${Chapter.TABLE}.${Chapter.COL_URL} = ? AND ${History.TABLE}.${History.COL_CHAPTER_ID} = ${Chapter.TABLE}.${Chapter.COL_ID}
+"""
+
+fun getLastReadMangaQuery() = """
+    SELECT ${Manga.TABLE}.*, MAX(${History.TABLE}.${History.COL_LAST_READ}) AS max
+    FROM ${Manga.TABLE}
+    JOIN ${Chapter.TABLE}
+    ON ${Manga.TABLE}.${Manga.COL_ID} = ${Chapter.TABLE}.${Chapter.COL_MANGA_ID}
+    JOIN ${History.TABLE}
+    ON ${Chapter.TABLE}.${Chapter.COL_ID} = ${History.TABLE}.${History.COL_CHAPTER_ID}
+    WHERE ${Manga.TABLE}.${Manga.COL_FAVORITE} = 1
+    GROUP BY ${Manga.TABLE}.${Manga.COL_ID}
+    ORDER BY max DESC
+"""
+
+fun getTotalChapterMangaQuery()= """
+    SELECT ${Manga.TABLE}.*
+    FROM ${Manga.TABLE}
+    JOIN ${Chapter.TABLE}
+    ON ${Manga.TABLE}.${Manga.COL_ID} = ${Chapter.TABLE}.${Chapter.COL_MANGA_ID}
+    GROUP BY ${Manga.TABLE}.${Manga.COL_ID}
+    ORDER by COUNT(*)
+"""
+
+/**
+ * Query to get the categories for a manga.
+ */
+fun getCategoriesForMangaQuery() = """
+    SELECT ${Category.TABLE}.* FROM ${Category.TABLE}
+    JOIN ${MangaCategory.TABLE} ON ${Category.TABLE}.${Category.COL_ID} =
+    ${MangaCategory.TABLE}.${MangaCategory.COL_CATEGORY_ID}
+    WHERE ${MangaCategory.COL_MANGA_ID} = ?
+"""
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/TrackQueries.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/queries/TrackQueries.kt
@ -0,0 +1,34 @@
+package eu.kanade.tachiyomi.data.database.queries
+
+import com.pushtorefresh.storio.sqlite.queries.DeleteQuery
+import com.pushtorefresh.storio.sqlite.queries.Query
+import eu.kanade.tachiyomi.data.database.DbProvider
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.models.Track
+import eu.kanade.tachiyomi.data.database.tables.TrackTable
+import eu.kanade.tachiyomi.data.track.TrackService
+
+interface TrackQueries : DbProvider {
+
+    fun getTracks(manga: Manga) = db.get()
+            .listOfObjects(Track::class.java)
+            .withQuery(Query.builder()
+                    .table(TrackTable.TABLE)
+                    .where("${TrackTable.COL_MANGA_ID} = ?")
+                    .whereArgs(manga.id)
+                    .build())
+            .prepare()
+
+    fun insertTrack(track: Track) = db.put().`object`(track).prepare()
+
+    fun insertTracks(tracks: List<Track>) = db.put().objects(tracks).prepare()
+
+    fun deleteTrackForManga(manga: Manga, sync: TrackService) = db.delete()
+            .byQuery(DeleteQuery.builder()
+                    .table(TrackTable.TABLE)
+                    .where("${TrackTable.COL_MANGA_ID} = ? AND ${TrackTable.COL_SYNC_ID} = ?")
+                    .whereArgs(manga.id, sync.id)
+                    .build())
+            .prepare()
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/ChapterBackupPutResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/ChapterBackupPutResolver.kt
@ -0,0 +1,35 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResolver
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable
+
+class ChapterBackupPutResolver : PutResolver<Chapter>() {
+
+    override fun performPut(db: StorIOSQLite, chapter: Chapter) = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(chapter)
+        val contentValues = mapToContentValues(chapter)
+
+        val numberOfRowsUpdated = db.lowLevel().update(updateQuery, contentValues)
+        PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+    }
+
+    fun mapToUpdateQuery(chapter: Chapter) = UpdateQuery.builder()
+            .table(ChapterTable.TABLE)
+            .where("${ChapterTable.COL_URL} = ?")
+            .whereArgs(chapter.url)
+            .build()
+
+    fun mapToContentValues(chapter: Chapter) = ContentValues(3).apply {
+        put(ChapterTable.COL_READ, chapter.read)
+        put(ChapterTable.COL_BOOKMARK, chapter.bookmark)
+        put(ChapterTable.COL_LAST_PAGE_READ, chapter.last_page_read)
+    }
+
+}
+
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/ChapterProgressPutResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/ChapterProgressPutResolver.kt
@ -0,0 +1,35 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResolver
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable
+
+class ChapterProgressPutResolver : PutResolver<Chapter>() {
+
+    override fun performPut(db: StorIOSQLite, chapter: Chapter) = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(chapter)
+        val contentValues = mapToContentValues(chapter)
+
+        val numberOfRowsUpdated = db.lowLevel().update(updateQuery, contentValues)
+        PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+    }
+
+    fun mapToUpdateQuery(chapter: Chapter) = UpdateQuery.builder()
+            .table(ChapterTable.TABLE)
+            .where("${ChapterTable.COL_ID} = ?")
+            .whereArgs(chapter.id)
+            .build()
+
+    fun mapToContentValues(chapter: Chapter) = ContentValues(3).apply {
+        put(ChapterTable.COL_READ, chapter.read)
+        put(ChapterTable.COL_BOOKMARK, chapter.bookmark)
+        put(ChapterTable.COL_LAST_PAGE_READ, chapter.last_page_read)
+    }
+
+}
+
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/ChapterSourceOrderPutResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/ChapterSourceOrderPutResolver.kt
@ -0,0 +1,32 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResolver
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.tables.ChapterTable
+
+class ChapterSourceOrderPutResolver : PutResolver<Chapter>() {
+
+    override fun performPut(db: StorIOSQLite, chapter: Chapter) = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(chapter)
+        val contentValues = mapToContentValues(chapter)
+
+        val numberOfRowsUpdated = db.lowLevel().update(updateQuery, contentValues)
+        PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+    }
+
+    fun mapToUpdateQuery(chapter: Chapter) = UpdateQuery.builder()
+            .table(ChapterTable.TABLE)
+            .where("${ChapterTable.COL_URL} = ? AND ${ChapterTable.COL_MANGA_ID} = ?")
+            .whereArgs(chapter.url, chapter.manga_id)
+            .build()
+
+    fun mapToContentValues(chapter: Chapter) = ContentValues(1).apply {
+        put(ChapterTable.COL_SOURCE_ORDER, chapter.source_order)
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/HistoryLastReadPutResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/HistoryLastReadPutResolver.kt
@ -0,0 +1,64 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import android.support.annotation.NonNull
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.Query
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.mappers.HistoryPutResolver
+import eu.kanade.tachiyomi.data.database.models.History
+import eu.kanade.tachiyomi.data.database.tables.HistoryTable
+
+class HistoryLastReadPutResolver : HistoryPutResolver() {
+
+    /**
+     * Updates last_read time of chapter
+     */
+    override fun performPut(@NonNull db: StorIOSQLite, @NonNull history: History): PutResult = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(history)
+
+        val cursor = db.lowLevel().query(Query.builder()
+                .table(updateQuery.table())
+                .where(updateQuery.where())
+                .whereArgs(updateQuery.whereArgs())
+                .build())
+
+        val putResult: PutResult
+
+        try {
+            if (cursor.count == 0) {
+                val insertQuery = mapToInsertQuery(history)
+                val insertedId = db.lowLevel().insert(insertQuery, mapToContentValues(history))
+                putResult = PutResult.newInsertResult(insertedId, insertQuery.table())
+            } else {
+                val numberOfRowsUpdated = db.lowLevel().update(updateQuery, mapToUpdateContentValues(history))
+                putResult = PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+            }
+        } finally {
+            cursor.close()
+        }
+
+        putResult
+    }
+
+    /**
+     * Creates update query
+     * @param obj history object
+     */
+    override fun mapToUpdateQuery(obj: History) = UpdateQuery.builder()
+            .table(HistoryTable.TABLE)
+            .where("${HistoryTable.COL_CHAPTER_ID} = ?")
+            .whereArgs(obj.chapter_id)
+            .build()
+
+    /**
+     * Create content query
+     * @param history object
+     */
+    fun mapToUpdateContentValues(history: History) = ContentValues(1).apply {
+        put(HistoryTable.COL_LAST_READ, history.last_read)
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/LibraryMangaGetResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/LibraryMangaGetResolver.kt
@ -1,12 +1,11 @@
 package eu.kanade.tachiyomi.data.database.resolvers

 import android.database.Cursor
-
+import eu.kanade.tachiyomi.data.database.mappers.MangaGetResolver
 import eu.kanade.tachiyomi.data.database.models.Manga
-import eu.kanade.tachiyomi.data.database.models.MangaStorIOSQLiteGetResolver
 import eu.kanade.tachiyomi.data.database.tables.MangaTable

-class LibraryMangaGetResolver : MangaStorIOSQLiteGetResolver() {
+class LibraryMangaGetResolver : MangaGetResolver() {

    companion object {
        val INSTANCE = LibraryMangaGetResolver()
@ -15,10 +14,10 @@ class LibraryMangaGetResolver : MangaStorIOSQLiteGetResolver() {
    override fun mapFromCursor(cursor: Cursor): Manga {
        val manga = super.mapFromCursor(cursor)

-        val unreadColumn = cursor.getColumnIndex(MangaTable.COLUMN_UNREAD)
+        val unreadColumn = cursor.getColumnIndex(MangaTable.COL_UNREAD)
        manga.unread = cursor.getInt(unreadColumn)

-        val categoryColumn = cursor.getColumnIndex(MangaTable.COLUMN_CATEGORY)
+        val categoryColumn = cursor.getColumnIndex(MangaTable.COL_CATEGORY)
        manga.category = cursor.getInt(categoryColumn)

        return manga
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaChapterGetResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaChapterGetResolver.kt
@ -2,9 +2,9 @@ package eu.kanade.tachiyomi.data.database.resolvers

 import android.database.Cursor
 import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
-import eu.kanade.tachiyomi.data.database.models.ChapterStorIOSQLiteGetResolver
+import eu.kanade.tachiyomi.data.database.mappers.ChapterGetResolver
+import eu.kanade.tachiyomi.data.database.mappers.MangaGetResolver
 import eu.kanade.tachiyomi.data.database.models.MangaChapter
-import eu.kanade.tachiyomi.data.database.models.MangaStorIOSQLiteGetResolver

 class MangaChapterGetResolver : DefaultGetResolver<MangaChapter>() {

@ -12,15 +12,15 @@ class MangaChapterGetResolver : DefaultGetResolver<MangaChapter>() {
        val INSTANCE = MangaChapterGetResolver()
    }

-    private val mangaGetResolver = MangaStorIOSQLiteGetResolver()
+    private val mangaGetResolver = MangaGetResolver()

-    private val chapterGetResolver = ChapterStorIOSQLiteGetResolver()
+    private val chapterGetResolver = ChapterGetResolver()

    override fun mapFromCursor(cursor: Cursor): MangaChapter {
        val manga = mangaGetResolver.mapFromCursor(cursor)
        val chapter = chapterGetResolver.mapFromCursor(cursor)
        manga.id = chapter.manga_id
-        manga.url = cursor.getString(cursor.getColumnIndex("mangaUrl"));
+        manga.url = cursor.getString(cursor.getColumnIndex("mangaUrl"))

        return MangaChapter(manga, chapter)
    }
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaChapterHistoryGetResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaChapterHistoryGetResolver.kt
@ -0,0 +1,51 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.database.Cursor
+import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver
+import eu.kanade.tachiyomi.data.database.mappers.ChapterGetResolver
+import eu.kanade.tachiyomi.data.database.mappers.HistoryGetResolver
+import eu.kanade.tachiyomi.data.database.mappers.MangaGetResolver
+import eu.kanade.tachiyomi.data.database.models.MangaChapterHistory
+
+class MangaChapterHistoryGetResolver : DefaultGetResolver<MangaChapterHistory>() {
+    companion object {
+        val INSTANCE = MangaChapterHistoryGetResolver()
+    }
+
+    /**
+     * Manga get resolver
+     */
+    private val mangaGetResolver = MangaGetResolver()
+
+    /**
+     * Chapter get resolver
+     */
+    private val chapterResolver = ChapterGetResolver()
+
+    /**
+     * History get resolver
+     */
+    private val historyGetResolver = HistoryGetResolver()
+
+    /**
+     * Map correct objects from cursor result
+     */
+    override fun mapFromCursor(cursor: Cursor): MangaChapterHistory {
+        // Get manga object
+        val manga = mangaGetResolver.mapFromCursor(cursor)
+
+        // Get chapter object
+        val chapter = chapterResolver.mapFromCursor(cursor)
+
+        // Get history object
+        val history = historyGetResolver.mapFromCursor(cursor)
+
+        // Make certain column conflicts are dealt with
+        manga.id = chapter.manga_id
+        manga.url = cursor.getString(cursor.getColumnIndex("mangaUrl"))
+        chapter.id = history.chapter_id
+
+        // Return result
+        return MangaChapterHistory(manga, chapter, history)
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaFlagsPutResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaFlagsPutResolver.kt
@ -0,0 +1,33 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResolver
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.tables.MangaTable
+
+class MangaFlagsPutResolver : PutResolver<Manga>() {
+
+    override fun performPut(db: StorIOSQLite, manga: Manga) = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(manga)
+        val contentValues = mapToContentValues(manga)
+
+        val numberOfRowsUpdated = db.lowLevel().update(updateQuery, contentValues)
+        PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+    }
+
+    fun mapToUpdateQuery(manga: Manga) = UpdateQuery.builder()
+            .table(MangaTable.TABLE)
+            .where("${MangaTable.COL_ID} = ?")
+            .whereArgs(manga.id)
+            .build()
+
+    fun mapToContentValues(manga: Manga) = ContentValues(1).apply {
+        put(MangaTable.COL_CHAPTER_FLAGS, manga.chapter_flags)
+    }
+
+}
+
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaLastUpdatedPutResolver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaLastUpdatedPutResolver.kt
@ -0,0 +1,33 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResolver
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.tables.MangaTable
+
+class MangaLastUpdatedPutResolver : PutResolver<Manga>() {
+
+    override fun performPut(db: StorIOSQLite, manga: Manga) = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(manga)
+        val contentValues = mapToContentValues(manga)
+
+        val numberOfRowsUpdated = db.lowLevel().update(updateQuery, contentValues)
+        PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+    }
+
+    fun mapToUpdateQuery(manga: Manga) = UpdateQuery.builder()
+            .table(MangaTable.TABLE)
+            .where("${MangaTable.COL_ID} = ?")
+            .whereArgs(manga.id)
+            .build()
+
+    fun mapToContentValues(manga: Manga) = ContentValues(1).apply {
+        put(MangaTable.COL_LAST_UPDATE, manga.last_update)
+    }
+
+}
+
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/CategoryTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/CategoryTable.java
@ -1,39 +0,0 @@
-package eu.kanade.tachiyomi.data.database.tables;
-
-import android.support.annotation.NonNull;
-
-public class CategoryTable {
-
-    @NonNull
-    public static final String TABLE = "categories";
-
-    @NonNull
-    public static final String COLUMN_ID = "_id";
-
-    @NonNull
-    public static final String COLUMN_NAME = "name";
-
-    @NonNull
-    public static final String COLUMN_ORDER = "sort";
-
-    @NonNull
-    public static final String COLUMN_FLAGS = "flags";
-
-    // This is just class with Meta Data, we don't need instances
-    private CategoryTable() {
-        throw new IllegalStateException("No instances please");
-    }
-
-    // Better than static final field -> allows VM to unload useless String
-    // Because you need this string only once per application life on the device
-    @NonNull
-    public static String getCreateTableQuery() {
-        return "CREATE TABLE " + TABLE + "("
-                + COLUMN_ID + " INTEGER NOT NULL PRIMARY KEY, "
-                + COLUMN_NAME + " TEXT NOT NULL, "
-                + COLUMN_ORDER + " INTEGER NOT NULL, "
-                + COLUMN_FLAGS + " INTEGER NOT NULL"
-                + ");";
-
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/CategoryTable.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/CategoryTable.kt
@ -0,0 +1,23 @@
+package eu.kanade.tachiyomi.data.database.tables
+
+object CategoryTable {
+
+    const val TABLE = "categories"
+
+    const val COL_ID = "_id"
+
+    const val COL_NAME = "name"
+
+    const val COL_ORDER = "sort"
+
+    const val COL_FLAGS = "flags"
+
+    val createTableQuery: String
+        get() = """CREATE TABLE $TABLE(
+            $COL_ID INTEGER NOT NULL PRIMARY KEY,
+            $COL_NAME TEXT NOT NULL,
+            $COL_ORDER INTEGER NOT NULL,
+            $COL_FLAGS INTEGER NOT NULL
+            )"""
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.java
@ -1,59 +0,0 @@
-package eu.kanade.tachiyomi.data.database.tables;
-
-import android.support.annotation.NonNull;
-
-public class ChapterTable {
-
-    @NonNull
-    public static final String TABLE = "chapters";
-
-	@NonNull
-	public static final String COLUMN_ID = "_id";
-
-	@NonNull
-	public static final String COLUMN_MANGA_ID = "manga_id";
-
-	@NonNull
-	public static final String COLUMN_URL = "url";
-
-	@NonNull
-	public static final String COLUMN_NAME = "name";
-
-	@NonNull
-	public static final String COLUMN_READ = "read";
-
-	@NonNull
-	public static final String COLUMN_DATE_FETCH = "date_fetch";
-
-	@NonNull
-	public static final String COLUMN_DATE_UPLOAD = "date_upload";
-
-	@NonNull
-	public static final String COLUMN_LAST_PAGE_READ = "last_page_read";
-
-	@NonNull
-	public static final String COLUMN_CHAPTER_NUMBER = "chapter_number";
-
-	@NonNull
-	public static String getCreateTableQuery() {
-		return "CREATE TABLE " + TABLE + "("
-				+ COLUMN_ID + " INTEGER NOT NULL PRIMARY KEY, "
-				+ COLUMN_MANGA_ID + " INTEGER NOT NULL, "
-				+ COLUMN_URL + " TEXT NOT NULL, "
-				+ COLUMN_NAME + " TEXT NOT NULL, "
-				+ COLUMN_READ + " BOOLEAN NOT NULL, "
-				+ COLUMN_LAST_PAGE_READ + " INT NOT NULL, "
-				+ COLUMN_CHAPTER_NUMBER + " FLOAT NOT NULL, "
-				+ COLUMN_DATE_FETCH + " LONG NOT NULL, "
-				+ COLUMN_DATE_UPLOAD + " LONG NOT NULL, "
-				+ "FOREIGN KEY(" + COLUMN_MANGA_ID + ") REFERENCES " + MangaTable.TABLE + "(" + MangaTable.COLUMN_ID + ") "
-				+ "ON DELETE CASCADE"
-				+ ");";
-	}
-
-	public static String getCreateMangaIdIndexQuery() {
-		return "CREATE INDEX " + TABLE + "_" + COLUMN_MANGA_ID + "_index ON " + TABLE + "(" + COLUMN_MANGA_ID + ");";
-
-	}
-	
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.kt
@ -0,0 +1,61 @@
+package eu.kanade.tachiyomi.data.database.tables
+
+object ChapterTable {
+
+    const val TABLE = "chapters"
+
+    const val COL_ID = "_id"
+
+    const val COL_MANGA_ID = "manga_id"
+
+    const val COL_URL = "url"
+
+    const val COL_NAME = "name"
+
+    const val COL_READ = "read"
+
+    const val COL_SCANLATOR = "scanlator"
+
+    const val COL_BOOKMARK = "bookmark"
+
+    const val COL_DATE_FETCH = "date_fetch"
+
+    const val COL_DATE_UPLOAD = "date_upload"
+
+    const val COL_LAST_PAGE_READ = "last_page_read"
+
+    const val COL_CHAPTER_NUMBER = "chapter_number"
+
+    const val COL_SOURCE_ORDER = "source_order"
+
+    val createTableQuery: String
+        get() = """CREATE TABLE $TABLE(
+            $COL_ID INTEGER NOT NULL PRIMARY KEY,
+            $COL_MANGA_ID INTEGER NOT NULL,
+            $COL_URL TEXT NOT NULL,
+            $COL_NAME TEXT NOT NULL,
+            $COL_SCANLATOR TEXT,
+            $COL_READ BOOLEAN NOT NULL,
+            $COL_BOOKMARK BOOLEAN NOT NULL,
+            $COL_LAST_PAGE_READ INT NOT NULL,
+            $COL_CHAPTER_NUMBER FLOAT NOT NULL,
+            $COL_SOURCE_ORDER INTEGER NOT NULL,
+            $COL_DATE_FETCH LONG NOT NULL,
+            $COL_DATE_UPLOAD LONG NOT NULL,
+            FOREIGN KEY($COL_MANGA_ID) REFERENCES ${MangaTable.TABLE} (${MangaTable.COL_ID})
+            ON DELETE CASCADE
+            )"""
+
+    val createMangaIdIndexQuery: String
+        get() = "CREATE INDEX ${TABLE}_${COL_MANGA_ID}_index ON $TABLE($COL_MANGA_ID)"
+
+    val sourceOrderUpdateQuery: String
+        get() = "ALTER TABLE $TABLE ADD COLUMN $COL_SOURCE_ORDER INTEGER DEFAULT 0"
+
+    val bookmarkUpdateQuery: String
+        get() = "ALTER TABLE $TABLE ADD COLUMN $COL_BOOKMARK BOOLEAN DEFAULT FALSE"
+
+    val addScanlator: String
+        get() = "ALTER TABLE $TABLE ADD COLUMN $COL_SCANLATOR TEXT DEFAULT NULL"
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/HistoryTable.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/HistoryTable.kt
@ -0,0 +1,48 @@
+package eu.kanade.tachiyomi.data.database.tables
+
+object HistoryTable {
+
+    /**
+     * Table name
+     */
+    const val TABLE = "history"
+
+    /**
+     * Id column name
+     */
+    const val COL_ID = "${TABLE}_id"
+
+    /**
+     * Chapter id column name
+     */
+    const val COL_CHAPTER_ID = "${TABLE}_chapter_id"
+
+    /**
+     * Last read column name
+     */
+    const val COL_LAST_READ = "${TABLE}_last_read"
+
+    /**
+     * Time read column name
+     */
+    const val COL_TIME_READ = "${TABLE}_time_read"
+
+    /**
+     * query to create history table
+     */
+    val createTableQuery: String
+        get() = """CREATE TABLE $TABLE(
+            $COL_ID INTEGER NOT NULL PRIMARY KEY,
+            $COL_CHAPTER_ID INTEGER NOT NULL UNIQUE,
+            $COL_LAST_READ LONG,
+            $COL_TIME_READ LONG,
+            FOREIGN KEY($COL_CHAPTER_ID) REFERENCES ${ChapterTable.TABLE} (${ChapterTable.COL_ID})
+            ON DELETE CASCADE
+            )"""
+
+    /**
+     * query to index history chapter id
+     */
+    val createChapterIdIndexQuery: String
+        get() = "CREATE INDEX ${TABLE}_${COL_CHAPTER_ID}_index ON $TABLE($COL_CHAPTER_ID)"
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaCategoryTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaCategoryTable.java
@ -1,40 +0,0 @@
-package eu.kanade.tachiyomi.data.database.tables;
-
-import android.support.annotation.NonNull;
-
-public class MangaCategoryTable {
-
-    @NonNull
-    public static final String TABLE = "mangas_categories";
-
-    @NonNull
-    public static final String COLUMN_ID = "_id";
-
-    @NonNull
-    public static final String COLUMN_MANGA_ID = "manga_id";
-
-    @NonNull
-    public static final String COLUMN_CATEGORY_ID = "category_id";
-
-    // This is just class with Meta Data, we don't need instances
-    private MangaCategoryTable() {
-        throw new IllegalStateException("No instances please");
-    }
-
-    // Better than static final field -> allows VM to unload useless String
-    // Because you need this string only once per application life on the device
-    @NonNull
-    public static String getCreateTableQuery() {
-        return "CREATE TABLE " + TABLE + "("
-                + COLUMN_ID + " INTEGER NOT NULL PRIMARY KEY, "
-                + COLUMN_MANGA_ID + " INTEGER NOT NULL, "
-                + COLUMN_CATEGORY_ID + " INTEGER NOT NULL, "
-                + "FOREIGN KEY(" + COLUMN_CATEGORY_ID + ") REFERENCES " + CategoryTable.TABLE + "(" + CategoryTable.COLUMN_ID + ") "
-                + "ON DELETE CASCADE, "
-                + "FOREIGN KEY(" + COLUMN_MANGA_ID + ") REFERENCES " + MangaTable.TABLE + "(" + MangaTable.COLUMN_ID + ") "
-                + "ON DELETE CASCADE"
-                + ");";
-
-    }
-
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaCategoryTable.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaCategoryTable.kt
@ -0,0 +1,24 @@
+package eu.kanade.tachiyomi.data.database.tables
+
+object MangaCategoryTable {
+
+    const val TABLE = "mangas_categories"
+
+    const val COL_ID = "_id"
+
+    const val COL_MANGA_ID = "manga_id"
+
+    const val COL_CATEGORY_ID = "category_id"
+
+    val createTableQuery: String
+        get() = """CREATE TABLE $TABLE(
+            $COL_ID INTEGER NOT NULL PRIMARY KEY,
+            $COL_MANGA_ID INTEGER NOT NULL,
+            $COL_CATEGORY_ID INTEGER NOT NULL,
+            FOREIGN KEY($COL_CATEGORY_ID) REFERENCES ${CategoryTable.TABLE} (${CategoryTable.COL_ID})
+            ON DELETE CASCADE,
+            FOREIGN KEY($COL_MANGA_ID) REFERENCES ${MangaTable.TABLE} (${MangaTable.COL_ID})
+            ON DELETE CASCADE
+            )"""
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaSyncTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaSyncTable.java
@ -1,45 +0,0 @@
-package eu.kanade.tachiyomi.data.database.tables;
-
-import android.support.annotation.NonNull;
-
-public class MangaSyncTable {
-
-    public static final String TABLE = "manga_sync";
-
-    public static final String COLUMN_ID = "_id";
-
-    public static final String COLUMN_MANGA_ID = "manga_id";
-
-    public static final String COLUMN_SYNC_ID = "sync_id";
-
-    public static final String COLUMN_REMOTE_ID = "remote_id";
-
-    public static final String COLUMN_TITLE = "title";
-
-    public static final String COLUMN_LAST_CHAPTER_READ = "last_chapter_read";
-
-    public static final String COLUMN_STATUS = "status";
-
-    public static final String COLUMN_SCORE = "score";
-
-    public static final String COLUMN_TOTAL_CHAPTERS = "total_chapters";
-
-    @NonNull
-    public static String getCreateTableQuery() {
-        return "CREATE TABLE " + TABLE + "("
-                + COLUMN_ID + " INTEGER NOT NULL PRIMARY KEY, "
-                + COLUMN_MANGA_ID + " INTEGER NOT NULL, "
-                + COLUMN_SYNC_ID + " INTEGER NOT NULL, "
-                + COLUMN_REMOTE_ID + " INTEGER NOT NULL, "
-                + COLUMN_TITLE + " TEXT NOT NULL, "
-                + COLUMN_LAST_CHAPTER_READ + " INTEGER NOT NULL, "
-                + COLUMN_TOTAL_CHAPTERS + " INTEGER NOT NULL, "
-                + COLUMN_STATUS + " INTEGER NOT NULL, "
-                + COLUMN_SCORE + " FLOAT NOT NULL, "
-                + "UNIQUE (" + COLUMN_MANGA_ID + ", " + COLUMN_SYNC_ID + ") ON CONFLICT REPLACE, "
-                + "FOREIGN KEY(" + COLUMN_MANGA_ID + ") REFERENCES " + MangaTable.TABLE + "(" + MangaTable.COLUMN_ID + ") "
-                + "ON DELETE CASCADE"
-                + ");";
-    }
-
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaTable.java
@ -1,98 +0,0 @@
-package eu.kanade.tachiyomi.data.database.tables;
-
-import android.support.annotation.NonNull;
-
-public class MangaTable {
-
-    @NonNull
-    public static final String TABLE = "mangas";
-
-    @NonNull
-    public static final String COLUMN_ID = "_id";
-
-    @NonNull
-    public static final String COLUMN_SOURCE = "source";
-
-    @NonNull
-    public static final String COLUMN_URL = "url";
-
-    @NonNull
-    public static final String COLUMN_ARTIST = "artist";
-
-    @NonNull
-    public static final String COLUMN_AUTHOR = "author" ;
-
-    @NonNull
-    public static final String COLUMN_DESCRIPTION = "description";
-
-    @NonNull
-    public static final String COLUMN_GENRE = "genre";
-
-    @NonNull
-    public static final String COLUMN_TITLE = "title";
-
-    @NonNull
-    public static final String COLUMN_STATUS = "status";
-
-    @NonNull
-    public static final String COLUMN_THUMBNAIL_URL = "thumbnail_url";
-
-    @NonNull
-    public static final String COLUMN_FAVORITE = "favorite";
-
-    @NonNull
-    public static final String COLUMN_LAST_UPDATE = "last_update";
-
-    @NonNull
-    public static final String COLUMN_INITIALIZED = "initialized";
-
-    @NonNull
-    public static final String COLUMN_VIEWER = "viewer";
-
-    @NonNull
-    public static final String COLUMN_CHAPTER_FLAGS = "chapter_flags";
-
-    @NonNull
-    public static final String COLUMN_UNREAD = "unread";
-
-    @NonNull
-    public static final String COLUMN_CATEGORY = "category";
-
-    // This is just class with Meta Data, we don't need instances
-    private MangaTable() {
-        throw new IllegalStateException("No instances please");
-    }
-
-    // Better than static final field -> allows VM to unload useless String
-    // Because you need this string only once per application life on the device
-    @NonNull
-    public static String getCreateTableQuery() {
-        return "CREATE TABLE " + TABLE + "("
-                + COLUMN_ID + " INTEGER NOT NULL PRIMARY KEY, "
-                + COLUMN_SOURCE + " INTEGER NOT NULL, "
-                + COLUMN_URL + " TEXT NOT NULL, "
-                + COLUMN_ARTIST + " TEXT, "
-                + COLUMN_AUTHOR + " TEXT, "
-                + COLUMN_DESCRIPTION + " TEXT, "
-                + COLUMN_GENRE + " TEXT, "
-                + COLUMN_TITLE + " TEXT NOT NULL, "
-                + COLUMN_STATUS + " INTEGER NOT NULL, "
-                + COLUMN_THUMBNAIL_URL + " TEXT, "
-                + COLUMN_FAVORITE + " INTEGER NOT NULL, "
-                + COLUMN_LAST_UPDATE + " LONG, "
-                + COLUMN_INITIALIZED + " BOOLEAN NOT NULL, "
-                + COLUMN_VIEWER + " INTEGER NOT NULL, "
-                + COLUMN_CHAPTER_FLAGS + " INTEGER NOT NULL"
-                + ");";
-
-    }
-
-    public static String getCreateUrlIndexQuery() {
-        return "CREATE INDEX " + TABLE + "_" + COLUMN_URL + "_index ON " + TABLE + "(" + COLUMN_URL + ");";
-    }
-
-    public static String getCreateFavoriteIndexQuery() {
-        return "CREATE INDEX " + TABLE + "_" + COLUMN_FAVORITE + "_index ON " + TABLE + "(" + COLUMN_FAVORITE + ");";
-
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaTable.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaTable.kt
@ -0,0 +1,65 @@
+package eu.kanade.tachiyomi.data.database.tables
+
+object MangaTable {
+
+    const val TABLE = "mangas"
+
+    const val COL_ID = "_id"
+
+    const val COL_SOURCE = "source"
+
+    const val COL_URL = "url"
+
+    const val COL_ARTIST = "artist"
+
+    const val COL_AUTHOR = "author"
+
+    const val COL_DESCRIPTION = "description"
+
+    const val COL_GENRE = "genre"
+
+    const val COL_TITLE = "title"
+
+    const val COL_STATUS = "status"
+
+    const val COL_THUMBNAIL_URL = "thumbnail_url"
+
+    const val COL_FAVORITE = "favorite"
+
+    const val COL_LAST_UPDATE = "last_update"
+
+    const val COL_INITIALIZED = "initialized"
+
+    const val COL_VIEWER = "viewer"
+
+    const val COL_CHAPTER_FLAGS = "chapter_flags"
+
+    const val COL_UNREAD = "unread"
+
+    const val COL_CATEGORY = "category"
+
+    val createTableQuery: String
+        get() = """CREATE TABLE $TABLE(
+            $COL_ID INTEGER NOT NULL PRIMARY KEY,
+            $COL_SOURCE INTEGER NOT NULL,
+            $COL_URL TEXT NOT NULL,
+            $COL_ARTIST TEXT,
+            $COL_AUTHOR TEXT,
+            $COL_DESCRIPTION TEXT,
+            $COL_GENRE TEXT,
+            $COL_TITLE TEXT NOT NULL,
+            $COL_STATUS INTEGER NOT NULL,
+            $COL_THUMBNAIL_URL TEXT,
+            $COL_FAVORITE INTEGER NOT NULL,
+            $COL_LAST_UPDATE LONG,
+            $COL_INITIALIZED BOOLEAN NOT NULL,
+            $COL_VIEWER INTEGER NOT NULL,
+            $COL_CHAPTER_FLAGS INTEGER NOT NULL
+            )"""
+
+    val createUrlIndexQuery: String
+        get() = "CREATE INDEX ${TABLE}_${COL_URL}_index ON $TABLE($COL_URL)"
+
+    val createFavoriteIndexQuery: String
+        get() = "CREATE INDEX ${TABLE}_${COL_FAVORITE}_index ON $TABLE($COL_FAVORITE)"
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/TrackTable.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/TrackTable.kt
@ -0,0 +1,41 @@
+package eu.kanade.tachiyomi.data.database.tables
+
+object TrackTable {
+
+    const val TABLE = "manga_sync"
+
+    const val COL_ID = "_id"
+
+    const val COL_MANGA_ID = "manga_id"
+
+    const val COL_SYNC_ID = "sync_id"
+
+    const val COL_REMOTE_ID = "remote_id"
+
+    const val COL_TITLE = "title"
+
+    const val COL_LAST_CHAPTER_READ = "last_chapter_read"
+
+    const val COL_STATUS = "status"
+
+    const val COL_SCORE = "score"
+
+    const val COL_TOTAL_CHAPTERS = "total_chapters"
+
+    val createTableQuery: String
+        get() = """CREATE TABLE $TABLE(
+            $COL_ID INTEGER NOT NULL PRIMARY KEY,
+            $COL_MANGA_ID INTEGER NOT NULL,
+            $COL_SYNC_ID INTEGER NOT NULL,
+            $COL_REMOTE_ID INTEGER NOT NULL,
+            $COL_TITLE TEXT NOT NULL,
+            $COL_LAST_CHAPTER_READ INTEGER NOT NULL,
+            $COL_TOTAL_CHAPTERS INTEGER NOT NULL,
+            $COL_STATUS INTEGER NOT NULL,
+            $COL_SCORE FLOAT NOT NULL,
+            UNIQUE ($COL_MANGA_ID, $COL_SYNC_ID) ON CONFLICT REPLACE,
+            FOREIGN KEY($COL_MANGA_ID) REFERENCES ${MangaTable.TABLE} (${MangaTable.COL_ID})
+            ON DELETE CASCADE
+            )"""
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt
@ -1,413 +1,180 @@
 package eu.kanade.tachiyomi.data.download

 import android.content.Context
-import android.net.Uri
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
-import com.google.gson.stream.JsonReader
+import com.hippo.unifile.UniFile
+import com.jakewharton.rxrelay.BehaviorRelay
 import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
-import eu.kanade.tachiyomi.data.download.model.Download
 import eu.kanade.tachiyomi.data.download.model.DownloadQueue
-import eu.kanade.tachiyomi.data.preference.PreferencesHelper
-import eu.kanade.tachiyomi.data.preference.getOrDefault
-import eu.kanade.tachiyomi.data.source.SourceManager
-import eu.kanade.tachiyomi.data.source.base.Source
-import eu.kanade.tachiyomi.data.source.model.Page
-import eu.kanade.tachiyomi.event.DownloadChaptersEvent
-import eu.kanade.tachiyomi.util.*
+import eu.kanade.tachiyomi.source.Source
+import eu.kanade.tachiyomi.source.model.Page
 import rx.Observable
-import rx.Subscription
-import rx.android.schedulers.AndroidSchedulers
-import rx.schedulers.Schedulers
-import rx.subjects.BehaviorSubject
-import rx.subjects.PublishSubject
-import timber.log.Timber
-import java.io.File
-import java.io.FileReader
-import java.util.*
-import java.util.concurrent.TimeUnit

-class DownloadManager(private val context: Context, private val sourceManager: SourceManager, private val preferences: PreferencesHelper) {
+/**
+ * This class is used to manage chapter downloads in the application. It must be instantiated once
+ * and retrieved through dependency injection. You can use this class to queue new chapters or query
+ * downloaded chapters.
+ *
+ * @param context the application context.
+ */
+class DownloadManager(context: Context) {

-    private val gson = Gson()
+    /**
+     * Downloads provider, used to retrieve the folders where the chapters are or should be stored.
+     */
+    private val provider = DownloadProvider(context)

-    private val downloadsQueueSubject = PublishSubject.create<List<Download>>()
-    val runningSubject = BehaviorSubject.create<Boolean>()
-    private var downloadsSubscription: Subscription? = null
+    /**
+     * Downloader whose only task is to download chapters.
+     */
+    private val downloader = Downloader(context, provider)

-    private val threadsSubject = BehaviorSubject.create<Int>()
-    private var threadsSubscription: Subscription? = null
+    /**
+     * Downloads queue, where the pending chapters are stored.
+     */
+    val queue: DownloadQueue
+        get() = downloader.queue

-    val queue = DownloadQueue()
-
-    val imageFilenameRegex = "[^\\sa-zA-Z0-9.-]".toRegex()
-
-    val PAGE_LIST_FILE = "index.json"
-
-    @Volatile private var isRunning: Boolean = false
-
-    private fun initializeSubscriptions() {
-        downloadsSubscription?.unsubscribe()
-
-        threadsSubscription = preferences.downloadThreads().asObservable()
-                .subscribe { threadsSubject.onNext(it) }
-
-        downloadsSubscription = downloadsQueueSubject.flatMap { Observable.from(it) }
-                .lift(DynamicConcurrentMergeOperator<Download, Download>({ downloadChapter(it) }, threadsSubject))
-                .onBackpressureBuffer()
-                .observeOn(AndroidSchedulers.mainThread())
-                .map { download -> areAllDownloadsFinished() }
-                .subscribe({ finished ->
-                    if (finished!!) {
-                        DownloadService.stop(context)
-                    }
-                }, { e ->
-                    DownloadService.stop(context)
-                    Timber.e(e, e.message)
-                    context.toast(e.message)
-                })
-
-        if (!isRunning) {
-            isRunning = true
-            runningSubject.onNext(true)
-        }
-    }
-
-    fun destroySubscriptions() {
-        if (isRunning) {
-            isRunning = false
-            runningSubject.onNext(false)
-        }
-
-        if (downloadsSubscription != null) {
-            downloadsSubscription?.unsubscribe()
-            downloadsSubscription = null
-        }
-
-        if (threadsSubscription != null) {
-            threadsSubscription?.unsubscribe()
-        }
-
-    }
-
-    // Create a download object for every chapter in the event and add them to the downloads queue
-    fun onDownloadChaptersEvent(event: DownloadChaptersEvent) {
-        val manga = event.manga
-        val source = sourceManager.get(manga.source)
-
-        // Used to avoid downloading chapters with the same name
-        val addedChapters = ArrayList<String>()
-        val pending = ArrayList<Download>()
-
-        for (chapter in event.chapters) {
-            if (addedChapters.contains(chapter.name))
-                continue
-
-            addedChapters.add(chapter.name)
-            val download = Download(source, manga, chapter)
-
-            if (!prepareDownload(download)) {
-                queue.add(download)
-                pending.add(download)
-            }
-        }
-        if (isRunning) downloadsQueueSubject.onNext(pending)
-    }
-
-    // Public method to check if a chapter is downloaded
-    fun isChapterDownloaded(source: Source, manga: Manga, chapter: Chapter): Boolean {
-        val directory = getAbsoluteChapterDirectory(source, manga, chapter)
-        if (!directory.exists())
-            return false
-
-        val pages = getSavedPageList(source, manga, chapter)
-        return isChapterDownloaded(directory, pages)
-    }
-
-    // Prepare the download. Returns true if the chapter is already downloaded
-    private fun prepareDownload(download: Download): Boolean {
-        // If the chapter is already queued, don't add it again
-        for (queuedDownload in queue) {
-            if (download.chapter.id == queuedDownload.chapter.id)
-                return true
-        }
-
-        // Add the directory to the download object for future access
-        download.directory = getAbsoluteChapterDirectory(download)
-
-        // If the directory doesn't exist, the chapter isn't downloaded.
-        if (!download.directory.exists()) {
-            return false
-        }
-
-        // If the page list doesn't exist, the chapter isn't downloaded
-        val savedPages = getSavedPageList(download) ?: return false
-
-        // Add the page list to the download object for future access
-        download.pages = savedPages
-
-        // If the number of files matches the number of pages, the chapter is downloaded.
-        // We have the index file, so we check one file more
-        return isChapterDownloaded(download.directory, download.pages)
-    }
-
-    // Check that all the images are downloaded
-    private fun isChapterDownloaded(directory: File, pages: List<Page>?): Boolean {
-        return pages != null && !pages.isEmpty() && pages.size + 1 == directory.listFiles().size
-    }
-
-    // Download the entire chapter
-    private fun downloadChapter(download: Download): Observable<Download> {
-        DiskUtils.createDirectory(download.directory)
-
-        val pageListObservable = if (download.pages == null)
-            // Pull page list from network and add them to download object
-            download.source.pullPageListFromNetwork(download.chapter.url)
-                    .doOnNext { pages ->
-                        download.pages = pages
-                        savePageList(download)
-                    }
-        else
-            // Or if the page list already exists, start from the file
-            Observable.just(download.pages)
-
-        return Observable.defer { pageListObservable
-                .doOnNext { pages ->
-                    download.downloadedImages = 0
-                    download.status = Download.DOWNLOADING
-                }
-                // Get all the URLs to the source images, fetch pages if necessary
-                .flatMap { download.source.getAllImageUrlsFromPageList(it) }
-                // Start downloading images, consider we can have downloaded images already
-                .concatMap { page -> getOrDownloadImage(page, download) }
-                // Do after download completes
-                .doOnCompleted { onDownloadCompleted(download) }
-                .toList()
-                .map { pages -> download }
-                // If the page list threw, it will resume here
-                .onErrorResumeNext { error ->
-                    download.status = Download.ERROR
-                    Observable.just(download)
-                }
-        }.subscribeOn(Schedulers.io())
-    }
-
-    // Get the image from the filesystem if it exists or download from network
-    private fun getOrDownloadImage(page: Page, download: Download): Observable<Page> {
-        // If the image URL is empty, do nothing
-        if (page.imageUrl == null)
-            return Observable.just(page)
-
-        val filename = getImageFilename(page)
-        val imagePath = File(download.directory, filename)
-
-        // If the image is already downloaded, do nothing. Otherwise download from network
-        val pageObservable = if (isImageDownloaded(imagePath))
-            Observable.just(page)
-        else
-            downloadImage(page, download.source, download.directory, filename)
-
-        return pageObservable
-                // When the image is ready, set image path, progress (just in case) and status
-                .doOnNext {
-                    page.imagePath = imagePath.absolutePath
-                    page.progress = 100
-                    download.downloadedImages++
-                    page.status = Page.READY
-                }
-                // Mark this page as error and allow to download the remaining
-                .onErrorResumeNext {
-                    page.progress = 0
-                    page.status = Page.ERROR
-                    Observable.just(page)
-                }
-    }
-
-    // Save image on disk
-    private fun downloadImage(page: Page, source: Source, directory: File, filename: String): Observable<Page> {
-        page.status = Page.DOWNLOAD_IMAGE
-        return source.getImageProgressResponse(page)
-                .flatMap {
-                    try {
-                        val file = File(directory, filename)
-                        file.parentFile.mkdirs()
-                        it.body().source().saveImageTo(file.outputStream(), preferences.reencodeImage())
-                    } catch (e: Exception) {
-                        it.body().close()
-                        throw e
-                    }
-                    Observable.just(page)
-                }
-                .retryWhen {
-                    it.zipWith(Observable.range(1, 3)) { errors, retries -> retries }
-                            .flatMap { retries -> Observable.timer((retries * 2).toLong(), TimeUnit.SECONDS) }
-                }
-    }
-
-    // Public method to get the image from the filesystem. It does NOT provide any way to download the image
-    fun getDownloadedImage(page: Page, chapterDir: File): Observable<Page> {
-        if (page.imageUrl == null) {
-            page.status = Page.ERROR
-            return Observable.just(page)
-        }
-
-        val imagePath = File(chapterDir, getImageFilename(page))
-
-        // When the image is ready, set image path, progress (just in case) and status
-        if (isImageDownloaded(imagePath)) {
-            page.imagePath = imagePath.absolutePath
-            page.progress = 100
-            page.status = Page.READY
-        } else {
-            page.status = Page.ERROR
-        }
-        return Observable.just(page)
-    }
-
-    // Get the filename for an image given the page
-    private fun getImageFilename(page: Page): String {
-        val url = page.imageUrl
-        val number = String.format("%03d", page.pageNumber + 1)
-
-        // Try to preserve file extension
-        return when {
-            UrlUtil.isJpg(url) -> "$number.jpg"
-            UrlUtil.isPng(url) -> "$number.png"
-            UrlUtil.isGif(url) -> "$number.gif"
-            else -> Uri.parse(url).lastPathSegment.replace(imageFilenameRegex, "_")
-        }
-    }
-
-    private fun isImageDownloaded(imagePath: File): Boolean {
-        return imagePath.exists()
-    }
-
-    // Called when a download finishes. This doesn't mean the download was successful, so we check it
-    private fun onDownloadCompleted(download: Download) {
-        checkDownloadIsSuccessful(download)
-        savePageList(download)
-    }
-
-    private fun checkDownloadIsSuccessful(download: Download) {
-        var actualProgress = 0
-        var status = Download.DOWNLOADED
-        // If any page has an error, the download result will be error
-        for (page in download.pages) {
-            actualProgress += page.progress
-            if (page.status != Page.READY) status = Download.ERROR
-        }
-        // Ensure that the chapter folder has all the images
-        if (!isChapterDownloaded(download.directory, download.pages)) {
-            status = Download.ERROR
-        }
-        download.totalProgress = actualProgress
-        download.status = status
-        // Delete successful downloads from queue after notifying
-        if (status == Download.DOWNLOADED) {
-            queue.del(download)
-        }
-    }
-
-    // Return the page list from the chapter's directory if it exists, null otherwise
-    fun getSavedPageList(source: Source, manga: Manga, chapter: Chapter): List<Page>? {
-        val chapterDir = getAbsoluteChapterDirectory(source, manga, chapter)
-        val pagesFile = File(chapterDir, PAGE_LIST_FILE)
-
-        return try {
-            JsonReader(FileReader(pagesFile)).use {
-                val collectionType = object : TypeToken<List<Page>>() {}.type
-                gson.fromJson(it, collectionType)
-            }
-        } catch (e: Exception) {
-            null
-        }
-    }
-
-    // Shortcut for the method above
-    private fun getSavedPageList(download: Download): List<Page>? {
-        return getSavedPageList(download.source, download.manga, download.chapter)
-    }
-
-    // Save the page list to the chapter's directory
-    fun savePageList(source: Source, manga: Manga, chapter: Chapter, pages: List<Page>) {
-        val chapterDir = getAbsoluteChapterDirectory(source, manga, chapter)
-        val pagesFile = File(chapterDir, PAGE_LIST_FILE)
-
-        pagesFile.outputStream().use {
-            try {
-                it.write(gson.toJson(pages).toByteArray())
-                it.flush()
-            } catch (e: Exception) {
-                Timber.e(e, e.message)
-            }
-        }
-    }
-
-    // Shortcut for the method above
-    private fun savePageList(download: Download) {
-        savePageList(download.source, download.manga, download.chapter, download.pages)
-    }
-
-    fun getAbsoluteMangaDirectory(source: Source, manga: Manga): File {
-        val mangaRelativePath = source.visibleName +
-                File.separator +
-                manga.title.replace("[^\\sa-zA-Z0-9.-]".toRegex(), "_")
-
-        return File(preferences.downloadsDirectory().getOrDefault(), mangaRelativePath)
-    }
-
-    // Get the absolute path to the chapter directory
-    fun getAbsoluteChapterDirectory(source: Source, manga: Manga, chapter: Chapter): File {
-        val chapterRelativePath = chapter.name.replace("[^\\sa-zA-Z0-9.-]".toRegex(), "_")
-
-        return File(getAbsoluteMangaDirectory(source, manga), chapterRelativePath)
-    }
-
-    // Shortcut for the method above
-    private fun getAbsoluteChapterDirectory(download: Download): File {
-        return getAbsoluteChapterDirectory(download.source, download.manga, download.chapter)
-    }
-
-    fun deleteChapter(source: Source, manga: Manga, chapter: Chapter) {
-        val path = getAbsoluteChapterDirectory(source, manga, chapter)
-        DiskUtils.deleteFiles(path)
-    }
-
-    fun areAllDownloadsFinished(): Boolean {
-        for (download in queue) {
-            if (download.status <= Download.DOWNLOADING)
-                return false
-        }
-        return true
-    }
+    /**
+     * Subject for subscribing to downloader status.
+     */
+    val runningRelay: BehaviorRelay<Boolean>
+        get() = downloader.runningRelay

+    /**
+     * Tells the downloader to begin downloads.
+     *
+     * @return true if it's started, false otherwise (empty queue).
+     */
    fun startDownloads(): Boolean {
-        if (queue.isEmpty())
-            return false
-
-        if (downloadsSubscription == null || downloadsSubscription!!.isUnsubscribed)
-            initializeSubscriptions()
-
-        val pending = ArrayList<Download>()
-        for (download in queue) {
-            if (download.status != Download.DOWNLOADED) {
-                if (download.status != Download.QUEUE) download.status = Download.QUEUE
-                pending.add(download)
-            }
-        }
-        downloadsQueueSubject.onNext(pending)
-
-        return !pending.isEmpty()
+        return downloader.start()
    }

-    fun stopDownloads() {
-        destroySubscriptions()
-        for (download in queue) {
-            if (download.status == Download.DOWNLOADING) {
-                download.status = Download.ERROR
+    /**
+     * Tells the downloader to stop downloads.
+     *
+     * @param reason an optional reason for being stopped, used to notify the user.
+     */
+    fun stopDownloads(reason: String? = null) {
+        downloader.stop(reason)
+    }
+
+    /**
+     * Tells the downloader to pause downloads.
+     */
+    fun pauseDownloads() {
+        downloader.pause()
+    }
+
+    /**
+     * Empties the download queue.
+     *
+     * @param isNotification value that determines if status is set (needed for view updates)
+     */
+    fun clearQueue(isNotification: Boolean = false) {
+        downloader.clearQueue(isNotification)
+    }
+
+    /**
+     * Tells the downloader to enqueue the given list of chapters.
+     *
+     * @param manga the manga of the chapters.
+     * @param chapters the list of chapters to enqueue.
+     */
+    fun downloadChapters(manga: Manga, chapters: List<Chapter>) {
+        downloader.queueChapters(manga, chapters)
+    }
+
+    /**
+     * Builds the page list of a downloaded chapter.
+     *
+     * @param source the source of the chapter.
+     * @param manga the manga of the chapter.
+     * @param chapter the downloaded chapter.
+     * @return an observable containing the list of pages from the chapter.
+     */
+    fun buildPageList(source: Source, manga: Manga, chapter: Chapter): Observable<List<Page>> {
+        return buildPageList(provider.findChapterDir(source, manga, chapter))
+    }
+
+    /**
+     * Builds the page list of a downloaded chapter.
+     *
+     * @param chapterDir the file where the chapter is downloaded.
+     * @return an observable containing the list of pages from the chapter.
+     */
+    private fun buildPageList(chapterDir: UniFile?): Observable<List<Page>> {
+        return Observable.fromCallable {
+            val files = chapterDir?.listFiles().orEmpty()
+                    .filter { "image" in it.type.orEmpty() }
+
+            if (files.isEmpty()) {
+                throw Exception("Page list is empty")
            }
+
+            files.sortedBy { it.name }
+                    .mapIndexed { i, file ->
+                        Page(i, uri = file.uri).apply { status = Page.READY }
+                    }
        }
    }

+    /**
+     * Returns the directory name for a manga.
+     *
+     * @param manga the manga to query.
+     */
+    fun getMangaDirName(manga: Manga): String {
+        return provider.getMangaDirName(manga)
+    }
+
+    /**
+     * Returns the directory name for the given chapter.
+     *
+     * @param chapter the chapter to query.
+     */
+    fun getChapterDirName(chapter: Chapter): String {
+        return provider.getChapterDirName(chapter)
+    }
+
+    /**
+     * Returns the download directory for a source if it exists.
+     *
+     * @param source the source to query.
+     */
+    fun findSourceDir(source: Source): UniFile? {
+        return provider.findSourceDir(source)
+    }
+
+    /**
+     * Returns the directory for the given manga, if it exists.
+     *
+     * @param source the source of the manga.
+     * @param manga the manga to query.
+     */
+    fun findMangaDir(source: Source, manga: Manga): UniFile? {
+        return provider.findMangaDir(source, manga)
+    }
+
+    /**
+     * Returns the directory for the given chapter, if it exists.
+     *
+     * @param source the source of the chapter.
+     * @param manga the manga of the chapter.
+     * @param chapter the chapter to query.
+     */
+    fun findChapterDir(source: Source, manga: Manga, chapter: Chapter): UniFile? {
+        return provider.findChapterDir(source, manga, chapter)
+    }
+
+    /**
+     * Deletes the directory of a downloaded chapter.
+     *
+     * @param source the source of the chapter.
+     * @param manga the manga of the chapter.
+     * @param chapter the chapter to delete.
+     */
+    fun deleteChapter(source: Source, manga: Manga, chapter: Chapter) {
+        provider.findChapterDir(source, manga, chapter)?.delete()
+    }
 }
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt
@ -0,0 +1,271 @@
+package eu.kanade.tachiyomi.data.download
+
+import android.content.Context
+import android.graphics.BitmapFactory
+import android.support.v4.app.NotificationCompat
+import eu.kanade.tachiyomi.Constants
+import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.download.model.Download
+import eu.kanade.tachiyomi.data.download.model.DownloadQueue
+import eu.kanade.tachiyomi.data.notification.NotificationHandler
+import eu.kanade.tachiyomi.data.notification.NotificationReceiver
+import eu.kanade.tachiyomi.util.chop
+import eu.kanade.tachiyomi.util.notificationManager
+import java.util.regex.Pattern
+
+/**
+ * DownloadNotifier is used to show notifications when downloading one or multiple chapters.
+ *
+ * @param context context of application
+ */
+internal class DownloadNotifier(private val context: Context) {
+    /**
+     * Notification builder.
+     */
+    private val notification by lazy {
+        NotificationCompat.Builder(context)
+                .setLargeIcon(BitmapFactory.decodeResource(context.resources, R.mipmap.ic_launcher))
+    }
+
+    /**
+     * Status of download. Used for correct notification icon.
+     */
+    private var isDownloading = false
+
+    /**
+     * The size of queue on start download.
+     */
+    var initialQueueSize = 0
+        get() = field
+        set(value) {
+            if (value != 0){
+                isSingleChapter = (value == 1)
+            }
+            field = value
+        }
+
+    /**
+     * Simultaneous download setting > 1.
+     */
+    var multipleDownloadThreads = false
+
+    /**
+     * Updated when error is thrown
+     */
+    var errorThrown = false
+
+    /**
+     * Updated when only single page is downloaded
+     */
+    var isSingleChapter = false
+
+    /**
+     * Updated when paused
+     */
+    var paused = false
+
+    /**
+     * Shows a notification from this builder.
+     *
+     * @param id the id of the notification.
+     */
+    private fun NotificationCompat.Builder.show(id: Int = Constants.NOTIFICATION_DOWNLOAD_CHAPTER_ID) {
+        context.notificationManager.notify(id, build())
+    }
+
+    /**
+     * Clear old actions if they exist.
+     */
+    private fun clearActions() = with(notification) {
+        if (!mActions.isEmpty())
+            mActions.clear()
+    }
+
+    /**
+     * Dismiss the downloader's notification. Downloader error notifications use a different id, so
+     * those can only be dismissed by the user.
+     */
+    fun dismiss() {
+        context.notificationManager.cancel(Constants.NOTIFICATION_DOWNLOAD_CHAPTER_ID)
+    }
+
+    /**
+     * Called when download progress changes.
+     * Note: Only accepted when multi download active.
+     *
+     * @param queue the queue containing downloads.
+     */
+    fun onProgressChange(queue: DownloadQueue) {
+        if (multipleDownloadThreads) {
+            doOnProgressChange(null, queue)
+        }
+    }
+
+    /**
+     * Called when download progress changes.
+     * Note: Only accepted when single download active.
+     *
+     * @param download download object containing download information.
+     * @param queue the queue containing downloads.
+     */
+    fun onProgressChange(download: Download, queue: DownloadQueue) {
+        if (!multipleDownloadThreads) {
+            doOnProgressChange(download, queue)
+        }
+    }
+
+    /**
+     * Show notification progress of chapter.
+     *
+     * @param download download object containing download information.
+     * @param queue the queue containing downloads.
+     */
+    private fun doOnProgressChange(download: Download?, queue: DownloadQueue) {
+        // Create notification
+        with(notification) {
+            // Check if first call.
+            if (!isDownloading) {
+                setSmallIcon(android.R.drawable.stat_sys_download)
+                setAutoCancel(false)
+                clearActions()
+                // Open download manager when clicked
+                setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
+                isDownloading = true
+            }
+
+            if (multipleDownloadThreads) {
+                setContentTitle(context.getString(R.string.app_name))
+
+                // Reset the queue size if the download progress is negative
+                if ((initialQueueSize - queue.size) < 0)
+                    initialQueueSize = queue.size
+
+                setContentText(context.getString(R.string.chapter_downloading_progress)
+                        .format(initialQueueSize - queue.size, initialQueueSize))
+                setProgress(initialQueueSize, initialQueueSize - queue.size, false)
+            } else {
+                download?.let {
+                    val title = it.manga.title.chop(15)
+                    val quotedTitle = Pattern.quote(title)
+                    val chapter = download.chapter.name.replaceFirst("$quotedTitle[\\s]*[-]*[\\s]*".toRegex(RegexOption.IGNORE_CASE), "")
+                    setContentTitle("$title - $chapter".chop(30))
+                    setContentText(context.getString(R.string.chapter_downloading_progress)
+                            .format(it.downloadedImages, it.pages!!.size))
+                    setProgress(it.pages!!.size, it.downloadedImages, false)
+
+                }
+            }
+        }
+        // Displays the progress bar on notification
+        notification.show()
+    }
+
+    /**
+     * Show notification when download is paused.
+     */
+    fun onDownloadPaused() {
+        with(notification) {
+            setContentTitle(context.getString(R.string.chapter_paused))
+            setContentText(context.getString(R.string.download_notifier_download_paused))
+            setSmallIcon(R.drawable.ic_av_pause_grey_24dp_img)
+            setAutoCancel(false)
+            setProgress(0, 0, false)
+            clearActions()
+            // Open download manager when clicked
+            setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
+            // Resume action
+            addAction(R.drawable.ic_av_play_arrow_grey_img,
+                    context.getString(R.string.action_resume),
+                    NotificationReceiver.resumeDownloadsPendingBroadcast(context))
+            //Clear action
+            addAction(R.drawable.ic_clear_grey_24dp_img,
+                    context.getString(R.string.action_clear),
+                    NotificationReceiver.clearDownloadsPendingBroadcast(context))
+        }
+
+        // Show notification.
+        notification.show()
+
+        // Reset initial values
+        isDownloading = false
+        initialQueueSize = 0
+    }
+
+    /**
+     * Called when chapter is downloaded.
+     *
+     * @param download download object containing download information.
+     */
+    fun onDownloadCompleted(download: Download, queue: DownloadQueue) {
+        // Check if last download
+        if (!queue.isEmpty()) {
+            return
+        }
+        // Create notification.
+        with(notification) {
+            val title = download.manga.title.chop(15)
+            val quotedTitle = Pattern.quote(title)
+            val chapter = download.chapter.name.replaceFirst("$quotedTitle[\\s]*[-]*[\\s]*".toRegex(RegexOption.IGNORE_CASE), "")
+            setContentTitle("$title - $chapter".chop(30))
+            setContentText(context.getString(R.string.update_check_notification_download_complete))
+            setSmallIcon(android.R.drawable.stat_sys_download_done)
+            setAutoCancel(true)
+            clearActions()
+            setContentIntent(NotificationReceiver.openChapterPendingBroadcast(context, download.manga, download.chapter))
+            setProgress(0, 0, false)
+        }
+
+        // Show notification.
+        notification.show()
+
+        // Reset initial values
+        isDownloading = false
+        initialQueueSize = 0
+    }
+
+    /**
+     * Called when the downloader receives a warning.
+     *
+     * @param reason the text to show.
+     */
+    fun onWarning(reason: String) {
+        with(notification) {
+            setContentTitle(context.getString(R.string.download_notifier_downloader_title))
+            setContentText(reason)
+            setSmallIcon(android.R.drawable.stat_sys_warning)
+            setAutoCancel(true)
+            clearActions()
+            setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
+            setProgress(0, 0, false)
+        }
+        notification.show()
+
+        // Reset download information
+        isDownloading = false
+    }
+
+    /**
+     * Called when the downloader receives an error. It's shown as a separate notification to avoid
+     * being overwritten.
+     *
+     * @param error string containing error information.
+     * @param chapter string containing chapter title.
+     */
+    fun onError(error: String? = null, chapter: String? = null) {
+        // Create notification
+        with(notification) {
+            setContentTitle(chapter ?: context.getString(R.string.download_notifier_downloader_title))
+            setContentText(error ?: context.getString(R.string.download_notifier_unkown_error))
+            setSmallIcon(android.R.drawable.stat_sys_warning)
+            clearActions()
+            setAutoCancel(false)
+            setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
+            setProgress(0, 0, false)
+        }
+        notification.show(Constants.NOTIFICATION_DOWNLOAD_CHAPTER_ERROR_ID)
+
+        // Reset download information
+        errorThrown = true
+        isDownloading = false
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
@ -0,0 +1,111 @@
+package eu.kanade.tachiyomi.data.download
+
+import android.content.Context
+import android.net.Uri
+import com.hippo.unifile.UniFile
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import eu.kanade.tachiyomi.source.Source
+import eu.kanade.tachiyomi.util.DiskUtil
+import uy.kohesive.injekt.injectLazy
+
+/**
+ * This class is used to provide the directories where the downloads should be saved.
+ * It uses the following path scheme: /<root downloads dir>/<source name>/<manga>/<chapter>
+ *
+ * @param context the application context.
+ */
+class DownloadProvider(private val context: Context) {
+
+    /**
+     * Preferences helper.
+     */
+    private val preferences: PreferencesHelper by injectLazy()
+
+    /**
+     * The root directory for downloads.
+     */
+    private var downloadsDir = preferences.downloadsDirectory().getOrDefault().let {
+        UniFile.fromUri(context, Uri.parse(it))
+    }
+
+    init {
+        preferences.downloadsDirectory().asObservable()
+                .skip(1)
+                .subscribe { downloadsDir = UniFile.fromUri(context, Uri.parse(it)) }
+    }
+
+    /**
+     * Returns the download directory for a manga. For internal use only.
+     *
+     * @param source the source of the manga.
+     * @param manga the manga to query.
+     */
+    internal fun getMangaDir(source: Source, manga: Manga): UniFile {
+        return downloadsDir
+                .createDirectory(getSourceDirName(source))
+                .createDirectory(getMangaDirName(manga))
+    }
+
+    /**
+     * Returns the download directory for a source if it exists.
+     *
+     * @param source the source to query.
+     */
+    fun findSourceDir(source: Source): UniFile? {
+        return downloadsDir.findFile(getSourceDirName(source))
+    }
+
+    /**
+     * Returns the download directory for a manga if it exists.
+     *
+     * @param source the source of the manga.
+     * @param manga the manga to query.
+     */
+    fun findMangaDir(source: Source, manga: Manga): UniFile? {
+        val sourceDir = findSourceDir(source)
+        return sourceDir?.findFile(getMangaDirName(manga))
+    }
+
+    /**
+     * Returns the download directory for a chapter if it exists.
+     *
+     * @param source the source of the chapter.
+     * @param manga the manga of the chapter.
+     * @param chapter the chapter to query.
+     */
+    fun findChapterDir(source: Source, manga: Manga, chapter: Chapter): UniFile? {
+        val mangaDir = findMangaDir(source, manga)
+        return mangaDir?.findFile(getChapterDirName(chapter))
+    }
+
+    /**
+     * Returns the download directory name for a source.
+     *
+     * @param source the source to query.
+     */
+    fun getSourceDirName(source: Source): String {
+        return source.toString()
+    }
+
+    /**
+     * Returns the download directory name for a manga.
+     *
+     * @param manga the manga to query.
+     */
+    fun getMangaDirName(manga: Manga): String {
+        return DiskUtil.buildValidFilename(manga.title)
+    }
+
+    /**
+     * Returns the chapter directory name for a chapter.
+     *
+     * @param chapter the chapter to query.
+     */
+    fun getChapterDirName(chapter: Chapter): String {
+        return DiskUtil.buildValidFilename(chapter.name)
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadService.kt
@ -3,132 +3,177 @@ package eu.kanade.tachiyomi.data.download
 import android.app.Service
 import android.content.Context
 import android.content.Intent
+import android.net.NetworkInfo.State.CONNECTED
+import android.net.NetworkInfo.State.DISCONNECTED
 import android.os.IBinder
 import android.os.PowerManager
-import com.github.pwittchen.reactivenetwork.library.ConnectivityStatus
+import com.github.pwittchen.reactivenetwork.library.Connectivity
 import com.github.pwittchen.reactivenetwork.library.ReactiveNetwork
-import eu.kanade.tachiyomi.App
+import com.jakewharton.rxrelay.BehaviorRelay
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.util.connectivityManager
+import eu.kanade.tachiyomi.util.plusAssign
+import eu.kanade.tachiyomi.util.powerManager
 import eu.kanade.tachiyomi.util.toast
-import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
 import rx.schedulers.Schedulers
-import javax.inject.Inject
+import rx.subscriptions.CompositeSubscription
+import uy.kohesive.injekt.injectLazy

+/**
+ * This service is used to manage the downloader. The system can decide to stop the service, in
+ * which case the downloader is also stopped. It's also stopped while there's no network available.
+ * While the downloader is running, a wake lock will be held.
+ */
 class DownloadService : Service() {

    companion object {

+        /**
+         * Relay used to know when the service is running.
+         */
+        val runningRelay: BehaviorRelay<Boolean> = BehaviorRelay.create(false)
+
+        /**
+         * Starts this service.
+         *
+         * @param context the application context.
+         */
        fun start(context: Context) {
            context.startService(Intent(context, DownloadService::class.java))
        }

+        /**
+         * Stops this service.
+         *
+         * @param context the application context.
+         */
        fun stop(context: Context) {
            context.stopService(Intent(context, DownloadService::class.java))
        }
    }

-    @Inject lateinit var downloadManager: DownloadManager
-    @Inject lateinit var preferences: PreferencesHelper
+    /**
+     * Download manager.
+     */
+    private val downloadManager: DownloadManager by injectLazy()

-    private var wakeLock: PowerManager.WakeLock? = null
-    private var networkChangeSubscription: Subscription? = null
-    private var queueRunningSubscription: Subscription? = null
-    private var isRunning: Boolean = false
+    /**
+     * Preferences helper.
+     */
+    private val preferences: PreferencesHelper by injectLazy()

+    /**
+     * Wake lock to prevent the device to enter sleep mode.
+     */
+    private val wakeLock by lazy {
+        powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "DownloadService:WakeLock")
+    }
+
+    /**
+     * Subscriptions to store while the service is running.
+     */
+    private lateinit var subscriptions: CompositeSubscription
+
+    /**
+     * Called when the service is created.
+     */
    override fun onCreate() {
        super.onCreate()
-        App.get(this).component.inject(this)
-
-        createWakeLock()
-
-        listenQueueRunningChanges()
+        runningRelay.call(true)
+        subscriptions = CompositeSubscription()
+        listenDownloaderState()
        listenNetworkChanges()
    }

-    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
-        return Service.START_STICKY
-    }
-
+    /**
+     * Called when the service is destroyed.
+     */
    override fun onDestroy() {
-        queueRunningSubscription?.unsubscribe()
-        networkChangeSubscription?.unsubscribe()
-        downloadManager.destroySubscriptions()
-        destroyWakeLock()
+        runningRelay.call(false)
+        subscriptions.unsubscribe()
+        downloadManager.stopDownloads()
+        wakeLock.releaseIfNeeded()
        super.onDestroy()
    }

+    /**
+     * Not used.
+     */
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        return Service.START_NOT_STICKY
+    }
+
+    /**
+     * Not used.
+     */
    override fun onBind(intent: Intent): IBinder? {
        return null
    }

+    /**
+     * Listens to network changes.
+     *
+     * @see onNetworkStateChanged
+     */
    private fun listenNetworkChanges() {
-        networkChangeSubscription = ReactiveNetwork().enableInternetCheck()
-                .observeConnectivity(applicationContext)
+        subscriptions += ReactiveNetwork.observeNetworkConnectivity(applicationContext)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe({ state ->
-                    when (state) {
-                        ConnectivityStatus.WIFI_CONNECTED_HAS_INTERNET -> {
-                            // If there are no remaining downloads, destroy the service
-                            if (!isRunning && !downloadManager.startDownloads()) {
-                                stopSelf()
-                            }
-                        }
-                        ConnectivityStatus.MOBILE_CONNECTED -> {
-                            if (!preferences.downloadOnlyOverWifi()) {
-                                if (!isRunning && !downloadManager.startDownloads()) {
-                                    stopSelf()
-                                }
-                            } else if (isRunning) {
-                                downloadManager.stopDownloads()
-                            }
-                        }
-                        else -> {
-                            if (isRunning) {
-                                downloadManager.stopDownloads()
-                            }
-                        }
-                    }
+                .subscribe({ state -> onNetworkStateChanged(state)
                }, { error ->
                    toast(R.string.download_queue_error)
                    stopSelf()
                })
    }

-    private fun listenQueueRunningChanges() {
-        queueRunningSubscription = downloadManager.runningSubject.subscribe { running ->
-            isRunning = running
+    /**
+     * Called when the network state changes.
+     *
+     * @param connectivity the new network state.
+     */
+    private fun onNetworkStateChanged(connectivity: Connectivity) {
+        when (connectivity.state) {
+            CONNECTED -> {
+                if (preferences.downloadOnlyOverWifi() && connectivityManager.isActiveNetworkMetered) {
+                    downloadManager.stopDownloads(getString(R.string.download_notifier_text_only_wifi))
+                } else {
+                    val started = downloadManager.startDownloads()
+                    if (!started) stopSelf()
+                }
+            }
+            DISCONNECTED -> {
+                downloadManager.stopDownloads(getString(R.string.download_notifier_no_network))
+            }
+            else -> { /* Do nothing */ }
+        }
+    }
+
+    /**
+     * Listens to downloader status. Enables or disables the wake lock depending on the status.
+     */
+    private fun listenDownloaderState() {
+        subscriptions += downloadManager.runningRelay.subscribe { running ->
            if (running)
-                acquireWakeLock()
+                wakeLock.acquireIfNeeded()
            else
-                releaseWakeLock()
+                wakeLock.releaseIfNeeded()
        }
    }

-    private fun createWakeLock() {
-        wakeLock = (getSystemService(Context.POWER_SERVICE) as PowerManager).newWakeLock(
-                PowerManager.PARTIAL_WAKE_LOCK, "DownloadService:WakeLock")
+    /**
+     * Releases the wake lock if it's held.
+     */
+    fun PowerManager.WakeLock.releaseIfNeeded() {
+        if (isHeld) release()
    }

-    private fun destroyWakeLock() {
-        if (wakeLock != null && wakeLock!!.isHeld) {
-            wakeLock!!.release()
-            wakeLock = null
-        }
-    }
-
-    fun acquireWakeLock() {
-        if (wakeLock != null && !wakeLock!!.isHeld) {
-            wakeLock!!.acquire()
-        }
-    }
-
-    fun releaseWakeLock() {
-        if (wakeLock != null && wakeLock!!.isHeld) {
-            wakeLock!!.release()
-        }
+    /**
+     * Acquires the wake lock if it's not held.
+     */
+    fun PowerManager.WakeLock.acquireIfNeeded() {
+        if (!isHeld) acquire()
    }

 }
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadStore.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadStore.kt
@ -0,0 +1,135 @@
+package eu.kanade.tachiyomi.data.download
+
+import android.content.Context
+import com.google.gson.Gson
+import eu.kanade.tachiyomi.data.database.DatabaseHelper
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.download.model.Download
+import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.source.online.HttpSource
+import uy.kohesive.injekt.injectLazy
+
+/**
+ * This class is used to persist active downloads across application restarts.
+ *
+ * @param context the application context.
+ */
+class DownloadStore(context: Context) {
+
+    /**
+     * Preference file where active downloads are stored.
+     */
+    private val preferences = context.getSharedPreferences("active_downloads", Context.MODE_PRIVATE)
+
+    /**
+     * Gson instance to serialize/deserialize downloads.
+     */
+    private val gson: Gson by injectLazy()
+
+    /**
+     * Source manager.
+     */
+    private val sourceManager: SourceManager by injectLazy()
+
+    /**
+     * Database helper.
+     */
+    private val db: DatabaseHelper by injectLazy()
+
+    /**
+     * Counter used to keep the queue order.
+     */
+    private var counter = 0
+
+    /**
+     * Adds a list of downloads to the store.
+     *
+     * @param downloads the list of downloads to add.
+     */
+    fun addAll(downloads: List<Download>) {
+        val editor = preferences.edit()
+        downloads.forEach { editor.putString(getKey(it), serialize(it)) }
+        editor.apply()
+    }
+
+    /**
+     * Removes a download from the store.
+     *
+     * @param download the download to remove.
+     */
+    fun remove(download: Download) {
+        preferences.edit().remove(getKey(download)).apply()
+    }
+
+    /**
+     * Removes all the downloads from the store.
+     */
+    fun clear() {
+        preferences.edit().clear().apply()
+    }
+
+    /**
+     * Returns the preference's key for the given download.
+     *
+     * @param download the download.
+     */
+    private fun getKey(download: Download): String {
+        return download.chapter.id!!.toString()
+    }
+
+    /**
+     * Returns the list of downloads to restore. It should be called in a background thread.
+     */
+    fun restore(): List<Download> {
+        val objs = preferences.all
+                .mapNotNull { it.value as? String }
+                .map { deserialize(it) }
+                .sortedBy { it.order }
+
+        val downloads = mutableListOf<Download>()
+        if (objs.isNotEmpty()) {
+            val cachedManga = mutableMapOf<Long, Manga?>()
+            for ((mangaId, chapterId) in objs) {
+                val manga = cachedManga.getOrPut(mangaId) {
+                    db.getManga(mangaId).executeAsBlocking()
+                } ?: continue
+                val source = sourceManager.get(manga.source) as? HttpSource ?: continue
+                val chapter = db.getChapter(chapterId).executeAsBlocking() ?: continue
+                downloads.add(Download(source, manga, chapter))
+            }
+        }
+
+        // Clear the store, downloads will be added again immediately.
+        clear()
+        return downloads
+    }
+
+    /**
+     * Converts a download to a string.
+     *
+     * @param download the download to serialize.
+     */
+    private fun serialize(download: Download): String {
+        val obj = DownloadObject(download.manga.id!!, download.chapter.id!!, counter++)
+        return gson.toJson(obj)
+    }
+
+    /**
+     * Restore a download from a string.
+     *
+     * @param string the download as string.
+     */
+    private fun deserialize(string: String): DownloadObject {
+        return gson.fromJson(string, DownloadObject::class.java)
+    }
+
+    /**
+     * Class used for download serialization
+     *
+     * @param mangaId the id of the manga.
+     * @param chapterId the id of the chapter.
+     * @param order the order of the download in the queue.
+     */
+    data class DownloadObject(val mangaId: Long, val chapterId: Long, val order: Int)
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
@ -0,0 +1,466 @@
+package eu.kanade.tachiyomi.data.download
+
+import android.content.Context
+import android.webkit.MimeTypeMap
+import com.hippo.unifile.UniFile
+import com.jakewharton.rxrelay.BehaviorRelay
+import com.jakewharton.rxrelay.PublishRelay
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.download.model.Download
+import eu.kanade.tachiyomi.data.download.model.DownloadQueue
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.source.online.HttpSource
+import eu.kanade.tachiyomi.source.online.fetchAllImageUrlsFromPageList
+import eu.kanade.tachiyomi.util.*
+import okhttp3.Response
+import rx.Observable
+import rx.android.schedulers.AndroidSchedulers
+import rx.schedulers.Schedulers
+import rx.subjects.BehaviorSubject
+import rx.subscriptions.CompositeSubscription
+import timber.log.Timber
+import uy.kohesive.injekt.injectLazy
+
+/**
+ * This class is the one in charge of downloading chapters.
+ *
+ * Its [queue] contains the list of chapters to download. In order to download them, the downloader
+ * subscriptions must be running and the list of chapters must be sent to them by [downloadsRelay].
+ *
+ * The queue manipulation must be done in one thread (currently the main thread) to avoid unexpected
+ * behavior, but it's safe to read it from multiple threads.
+ *
+ * @param context the application context.
+ * @param provider the downloads directory provider.
+ */
+class Downloader(private val context: Context, private val provider: DownloadProvider) {
+
+    /**
+     * Store for persisting downloads across restarts.
+     */
+    private val store = DownloadStore(context)
+
+    /**
+     * Queue where active downloads are kept.
+     */
+    val queue = DownloadQueue(store)
+
+    /**
+     * Source manager.
+     */
+    private val sourceManager: SourceManager by injectLazy()
+
+    /**
+     * Preferences.
+     */
+    private val preferences: PreferencesHelper by injectLazy()
+
+    /**
+     * Notifier for the downloader state and progress.
+     */
+    private val notifier by lazy { DownloadNotifier(context) }
+
+    /**
+     * Downloader subscriptions.
+     */
+    private val subscriptions = CompositeSubscription()
+
+    /**
+     * Subject to do a live update of the number of simultaneous downloads.
+     */
+    private val threadsSubject = BehaviorSubject.create<Int>()
+
+    /**
+     * Relay to send a list of downloads to the downloader.
+     */
+    private val downloadsRelay = PublishRelay.create<List<Download>>()
+
+    /**
+     * Relay to subscribe to the downloader status.
+     */
+    val runningRelay: BehaviorRelay<Boolean> = BehaviorRelay.create(false)
+
+    /**
+     * Whether the downloader is running.
+     */
+    @Volatile private var isRunning: Boolean = false
+
+    init {
+        Observable.fromCallable { store.restore() }
+                .map { downloads -> downloads.filter { isDownloadAllowed(it) } }
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe({ downloads -> queue.addAll(downloads)
+                }, { error -> Timber.e(error) })
+    }
+
+    /**
+     * Starts the downloader. It doesn't do anything if it's already running or there isn't anything
+     * to download.
+     *
+     * @return true if the downloader is started, false otherwise.
+     */
+    fun start(): Boolean {
+        if (isRunning || queue.isEmpty())
+            return false
+
+        if (!subscriptions.hasSubscriptions())
+            initializeSubscriptions()
+
+        val pending = queue.filter { it.status != Download.DOWNLOADED }
+        pending.forEach { if (it.status != Download.QUEUE) it.status = Download.QUEUE }
+
+        // Show download notification when simultaneous download > 1.
+        notifier.onProgressChange(queue)
+
+        downloadsRelay.call(pending)
+        return !pending.isEmpty()
+    }
+
+    /**
+     * Stops the downloader.
+     */
+    fun stop(reason: String? = null) {
+        destroySubscriptions()
+        queue
+                .filter { it.status == Download.DOWNLOADING }
+                .forEach { it.status = Download.ERROR }
+
+        if (reason != null) {
+            notifier.onWarning(reason)
+        } else {
+            if (notifier.paused) {
+                notifier.paused = false
+                notifier.onDownloadPaused()
+            } else if (notifier.isSingleChapter && !notifier.errorThrown) {
+                notifier.isSingleChapter = false
+            } else {
+                notifier.dismiss()
+            }
+        }
+    }
+
+    /**
+     * Pauses the downloader
+     */
+    fun pause() {
+        destroySubscriptions()
+        queue
+                .filter { it.status == Download.DOWNLOADING }
+                .forEach { it.status = Download.QUEUE }
+        notifier.paused = true
+    }
+
+    /**
+     * Removes everything from the queue.
+     *
+     * @param isNotification value that determines if status is set (needed for view updates)
+     */
+    fun clearQueue(isNotification: Boolean = false) {
+        destroySubscriptions()
+
+        //Needed to update the chapter view
+        if (isNotification) {
+            queue
+                    .filter { it.status == Download.QUEUE }
+                    .forEach { it.status = Download.NOT_DOWNLOADED }
+        }
+        queue.clear()
+        notifier.dismiss()
+    }
+
+    /**
+     * Prepares the subscriptions to start downloading.
+     */
+    private fun initializeSubscriptions() {
+        if (isRunning) return
+        isRunning = true
+        runningRelay.call(true)
+
+        subscriptions.clear()
+
+        subscriptions += preferences.downloadThreads().asObservable()
+                .subscribe {
+                    threadsSubject.onNext(it)
+                    notifier.multipleDownloadThreads = it > 1
+                }
+
+        subscriptions += downloadsRelay.flatMap { Observable.from(it) }
+                .lift(DynamicConcurrentMergeOperator<Download, Download>({ downloadChapter(it) }, threadsSubject))
+                .onBackpressureBuffer()
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe({ completeDownload(it)
+                }, { error ->
+                    DownloadService.stop(context)
+                    Timber.e(error)
+                    notifier.onError(error.message)
+                })
+    }
+
+    /**
+     * Destroys the downloader subscriptions.
+     */
+    private fun destroySubscriptions() {
+        if (!isRunning) return
+        isRunning = false
+        runningRelay.call(false)
+
+        subscriptions.clear()
+    }
+
+    /**
+     * Creates a download object for every chapter and adds them to the downloads queue. This method
+     * must be called in the main thread.
+     *
+     * @param manga the manga of the chapters to download.
+     * @param chapters the list of chapters to download.
+     */
+    fun queueChapters(manga: Manga, chapters: List<Chapter>) {
+        val source = sourceManager.get(manga.source) as? HttpSource ?: return
+
+        val chaptersToQueue = chapters
+                // Avoid downloading chapters with the same name.
+                .distinctBy { it.name }
+                // Add chapters to queue from the start.
+                .sortedByDescending { it.source_order }
+                // Create a downloader for each one.
+                .map { Download(source, manga, it) }
+                // Filter out those already queued or downloaded.
+                .filter { isDownloadAllowed(it) }
+
+        // Return if there's nothing to queue.
+        if (chaptersToQueue.isEmpty())
+            return
+
+        queue.addAll(chaptersToQueue)
+
+        // Initialize queue size.
+        notifier.initialQueueSize = queue.size
+
+        // Initial multi-thread
+        notifier.multipleDownloadThreads = preferences.downloadThreads().getOrDefault() > 1
+
+        if (isRunning) {
+            // Send the list of downloads to the downloader.
+            downloadsRelay.call(chaptersToQueue)
+        } else {
+            // Show initial notification.
+            notifier.onProgressChange(queue)
+        }
+    }
+
+    /**
+     * Returns true if the given download can be queued and downloaded.
+     *
+     * @param download the download to be checked.
+     */
+    private fun isDownloadAllowed(download: Download): Boolean {
+        // If the chapter is already queued, don't add it again
+        if (queue.any { it.chapter.id == download.chapter.id })
+            return false
+
+        val dir = provider.findChapterDir(download.source, download.manga, download.chapter)
+        if (dir != null && dir.exists())
+            return false
+
+        return true
+    }
+
+    /**
+     * Returns the observable which downloads a chapter.
+     *
+     * @param download the chapter to be downloaded.
+     */
+    private fun downloadChapter(download: Download): Observable<Download> {
+        val chapterDirname = provider.getChapterDirName(download.chapter)
+        val mangaDir = provider.getMangaDir(download.source, download.manga)
+        val tmpDir = mangaDir.createDirectory("${chapterDirname}_tmp")
+
+        val pageListObservable = if (download.pages == null) {
+            // Pull page list from network and add them to download object
+            download.source.fetchPageList(download.chapter)
+                    .doOnNext { pages ->
+                        if (pages.isEmpty()) {
+                            throw Exception("Page list is empty")
+                        }
+                        download.pages = pages
+                    }
+        } else {
+            // Or if the page list already exists, start from the file
+            Observable.just(download.pages!!)
+        }
+
+        return pageListObservable
+                .doOnNext { pages ->
+                    // Delete all temporary (unfinished) files
+                    tmpDir.listFiles()
+                            ?.filter { it.name!!.endsWith(".tmp") }
+                            ?.forEach { it.delete() }
+
+                    download.downloadedImages = 0
+                    download.status = Download.DOWNLOADING
+                }
+                // Get all the URLs to the source images, fetch pages if necessary
+                .flatMap { download.source.fetchAllImageUrlsFromPageList(it) }
+                // Start downloading images, consider we can have downloaded images already
+                .concatMap { page -> getOrDownloadImage(page, download, tmpDir) }
+                // Do when page is downloaded.
+                .doOnNext { notifier.onProgressChange(download, queue) }
+                .toList()
+                .map { pages -> download }
+                // Do after download completes
+                .doOnNext { ensureSuccessfulDownload(download, tmpDir, chapterDirname) }
+                // If the page list threw, it will resume here
+                .onErrorReturn { error ->
+                    download.status = Download.ERROR
+                    notifier.onError(error.message, download.chapter.name)
+                    download
+                }
+                .subscribeOn(Schedulers.io())
+    }
+
+    /**
+     * Returns the observable which gets the image from the filesystem if it exists or downloads it
+     * otherwise.
+     *
+     * @param page the page to download.
+     * @param download the download of the page.
+     * @param tmpDir the temporary directory of the download.
+     */
+    private fun getOrDownloadImage(page: Page, download: Download, tmpDir: UniFile): Observable<Page> {
+        // If the image URL is empty, do nothing
+        if (page.imageUrl == null)
+            return Observable.just(page)
+
+        val filename = String.format("%03d", page.number)
+        val tmpFile = tmpDir.findFile("$filename.tmp")
+
+        // Delete temp file if it exists.
+        tmpFile?.delete()
+
+        // Try to find the image file.
+        val imageFile = tmpDir.listFiles()!!.find { it.name!!.startsWith("$filename.") }
+
+        // If the image is already downloaded, do nothing. Otherwise download from network
+        val pageObservable = if (imageFile != null)
+            Observable.just(imageFile)
+        else
+            downloadImage(page, download.source, tmpDir, filename)
+
+        return pageObservable
+                // When the image is ready, set image path, progress (just in case) and status
+                .doOnNext { file ->
+                    page.uri = file.uri
+                    page.progress = 100
+                    download.downloadedImages++
+                    page.status = Page.READY
+                }
+                .map { page }
+                // Mark this page as error and allow to download the remaining
+                .onErrorReturn {
+                    page.progress = 0
+                    page.status = Page.ERROR
+                    page
+                }
+    }
+
+    /**
+     * Returns the observable which downloads the image from network.
+     *
+     * @param page the page to download.
+     * @param source the source of the page.
+     * @param tmpDir the temporary directory of the download.
+     * @param filename the filename of the image.
+     */
+    private fun downloadImage(page: Page, source: HttpSource, tmpDir: UniFile, filename: String): Observable<UniFile> {
+        page.status = Page.DOWNLOAD_IMAGE
+        page.progress = 0
+        return source.fetchImage(page)
+                .map { response ->
+                    val file = tmpDir.createFile("$filename.tmp")
+                    try {
+                        response.body()!!.source().saveTo(file.openOutputStream())
+                        val extension = getImageExtension(response, file)
+                        file.renameTo("$filename.$extension")
+                    } catch (e: Exception) {
+                        response.close()
+                        file.delete()
+                        throw e
+                    }
+                    file
+                }
+                // Retry 3 times, waiting 2, 4 and 8 seconds between attempts.
+                .retryWhen(RetryWithDelay(3, { (2 shl it - 1) * 1000 }, Schedulers.trampoline()))
+    }
+
+    /**
+     * Returns the extension of the downloaded image from the network response, or if it's null,
+     * analyze the file. If everything fails, assume it's a jpg.
+     *
+     * @param response the network response of the image.
+     * @param file the file where the image is already downloaded.
+     */
+    private fun getImageExtension(response: Response, file: UniFile): String {
+        // Read content type if available.
+        val mime = response.body()?.contentType()?.let { ct -> "${ct.type()}/${ct.subtype()}" }
+            // Else guess from the uri.
+            ?: context.contentResolver.getType(file.uri)
+            // Else read magic numbers.
+            ?: DiskUtil.findImageMime { file.openInputStream() }
+
+        return MimeTypeMap.getSingleton().getExtensionFromMimeType(mime) ?: "jpg"
+    }
+
+    /**
+     * Checks if the download was successful.
+     *
+     * @param download the download to check.
+     * @param tmpDir the directory where the download is currently stored.
+     * @param dirname the real (non temporary) directory name of the download.
+     */
+    private fun ensureSuccessfulDownload(download: Download, tmpDir: UniFile, dirname: String) {
+        // Ensure that the chapter folder has all the images.
+        val downloadedImages = tmpDir.listFiles().orEmpty().filterNot { it.name!!.endsWith(".tmp") }
+
+        download.status = if (downloadedImages.size == download.pages!!.size) {
+            Download.DOWNLOADED
+        } else {
+            Download.ERROR
+        }
+
+        // Only rename the directory if it's downloaded.
+        if (download.status == Download.DOWNLOADED) {
+            tmpDir.renameTo(dirname)
+        }
+    }
+
+    /**
+     * Completes a download. This method is called in the main thread.
+     */
+    private fun completeDownload(download: Download) {
+        // Delete successful downloads from queue
+        if (download.status == Download.DOWNLOADED) {
+            // remove downloaded chapter from queue
+            queue.remove(download)
+            notifier.onProgressChange(queue)
+        }
+        if (areAllDownloadsFinished()) {
+            if (notifier.isSingleChapter && !notifier.errorThrown) {
+                notifier.onDownloadCompleted(download, queue)
+            }
+            DownloadService.stop(context)
+        }
+    }
+
+    /**
+     * Returns true if all the queued downloads are in DOWNLOADED or ERROR state.
+     */
+    private fun areAllDownloadsFinished(): Boolean {
+        return queue.none { it.status <= Download.DOWNLOADING }
+    }
+
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/model/Download.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/model/Download.java
@ -1,55 +0,0 @@
-package eu.kanade.tachiyomi.data.download.model;
-
-import java.io.File;
-import java.util.List;
-
-import eu.kanade.tachiyomi.data.database.models.Chapter;
-import eu.kanade.tachiyomi.data.database.models.Manga;
-import eu.kanade.tachiyomi.data.source.base.Source;
-import eu.kanade.tachiyomi.data.source.model.Page;
-import rx.subjects.PublishSubject;
-
-public class Download {
-    public Source source;
-    public Manga manga;
-    public Chapter chapter;
-    public List<Page> pages;
-    public File directory;
-
-    public transient volatile int totalProgress;
-    public transient volatile int downloadedImages;
-    private transient volatile int status;
-
-    private transient PublishSubject<Download> statusSubject;
-
-    public static final int NOT_DOWNLOADED = 0;
-    public static final int QUEUE = 1;
-    public static final int DOWNLOADING = 2;
-    public static final int DOWNLOADED = 3;
-    public static final int ERROR = 4;
-
-
-    public Download(Source source, Manga manga, Chapter chapter) {
-        this.source = source;
-        this.manga = manga;
-        this.chapter = chapter;
-    }
-
-    public int getStatus() {
-        return status;
-    }
-
-    public void setStatus(int status) {
-        this.status = status;
-        notifyStatus();
-    }
-
-    public void setStatusSubject(PublishSubject<Download> subject) {
-        this.statusSubject = subject;
-    }
-
-    private void notifyStatus() {
-        if (statusSubject != null)
-            statusSubject.onNext(this);
-    }
-}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/model/Download.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/model/Download.kt
@ -0,0 +1,37 @@
+package eu.kanade.tachiyomi.data.download.model
+
+import eu.kanade.tachiyomi.data.database.models.Chapter
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.source.online.HttpSource
+import rx.subjects.PublishSubject
+
+class Download(val source: HttpSource, val manga: Manga, val chapter: Chapter) {
+
+    var pages: List<Page>? = null
+
+    @Volatile @Transient var totalProgress: Int = 0
+
+    @Volatile @Transient var downloadedImages: Int = 0
+
+    @Volatile @Transient var status: Int = 0
+        set(status) {
+            field = status
+            statusSubject?.onNext(this)
+        }
+
+    @Transient private var statusSubject: PublishSubject<Download>? = null
+
+    fun setStatusSubject(subject: PublishSubject<Download>?) {
+        statusSubject = subject
+    }
+
+    companion object {
+
+        const val NOT_DOWNLOADED = 0
+        const val QUEUE = 1
+        const val DOWNLOADING = 2
+        const val DOWNLOADED = 3
+        const val ERROR = 4
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/model/DownloadQueue.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/model/DownloadQueue.kt
@ -1,39 +1,62 @@
 package eu.kanade.tachiyomi.data.download.model

+import com.jakewharton.rxrelay.PublishRelay
 import eu.kanade.tachiyomi.data.database.models.Chapter
-import eu.kanade.tachiyomi.data.source.model.Page
+import eu.kanade.tachiyomi.data.download.DownloadStore
+import eu.kanade.tachiyomi.source.model.Page
 import rx.Observable
 import rx.subjects.PublishSubject
 import java.util.concurrent.CopyOnWriteArrayList

-class DownloadQueue : CopyOnWriteArrayList<Download>() {
+class DownloadQueue(
+        private val store: DownloadStore,
+        private val queue: MutableList<Download> = CopyOnWriteArrayList<Download>())
+: List<Download> by queue {

    private val statusSubject = PublishSubject.create<Download>()

-    override fun add(download: Download): Boolean {
-        download.setStatusSubject(statusSubject)
-        download.status = Download.QUEUE
-        return super.add(download)
+    private val updatedRelay = PublishRelay.create<Unit>()
+
+    fun addAll(downloads: List<Download>) {
+        downloads.forEach { download ->
+            download.setStatusSubject(statusSubject)
+            download.status = Download.QUEUE
+        }
+        queue.addAll(downloads)
+        store.addAll(downloads)
+        updatedRelay.call(Unit)
    }

-    fun del(download: Download) {
-        super.remove(download)
+    fun remove(download: Download) {
+        val removed = queue.remove(download)
+        store.remove(download)
        download.setStatusSubject(null)
-    }
-
-    fun del(chapter: Chapter) {
-        for (download in this) {
-            if (download.chapter.id == chapter.id) {
-                del(download)
-                break
-            }
+        if (removed) {
+            updatedRelay.call(Unit)
        }
    }

-    fun getActiveDownloads() =
+    fun remove(chapter: Chapter) {
+        find { it.chapter.id == chapter.id }?.let { remove(it) }
+    }
+
+    fun clear() {
+        queue.forEach { download ->
+            download.setStatusSubject(null)
+        }
+        queue.clear()
+        store.clear()
+        updatedRelay.call(Unit)
+    }
+
+    fun getActiveDownloads(): Observable<Download> =
        Observable.from(this).filter { download -> download.status == Download.DOWNLOADING }

-    fun getStatusObservable() = statusSubject.onBackpressureBuffer()
+    fun getStatusObservable(): Observable<Download> = statusSubject.onBackpressureBuffer()
+
+    fun getUpdatedObservable(): Observable<List<Download>> = updatedRelay.onBackpressureBuffer()
+            .startWith(Unit)
+            .map { this }

    fun getProgressObservable(): Observable<Download> {
        return statusSubject.onBackpressureBuffer()
--- a/app/src/main/java/eu/kanade/tachiyomi/data/glide/AppGlideModule.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/glide/AppGlideModule.kt
@ -0,0 +1,32 @@
+package eu.kanade.tachiyomi.data.glide
+
+import android.content.Context
+import com.bumptech.glide.Glide
+import com.bumptech.glide.GlideBuilder
+import com.bumptech.glide.integration.okhttp3.OkHttpUrlLoader
+import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory
+import com.bumptech.glide.load.model.GlideUrl
+import com.bumptech.glide.module.GlideModule
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.network.NetworkHelper
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.io.InputStream
+
+/**
+ * Class used to update Glide module settings
+ */
+class AppGlideModule : GlideModule {
+
+    override fun applyOptions(context: Context, builder: GlideBuilder) {
+        // Set the cache size of Glide to 15 MiB
+        builder.setDiskCache(InternalCacheDiskCacheFactory(context, 15 * 1024 * 1024))
+    }
+
+    override fun registerComponents(context: Context, glide: Glide) {
+        val networkFactory = OkHttpUrlLoader.Factory(Injekt.get<NetworkHelper>().client)
+
+        glide.register(GlideUrl::class.java, InputStream::class.java, networkFactory)
+        glide.register(Manga::class.java, InputStream::class.java, MangaModelLoader.Factory())
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/glide/FileFetcher.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/glide/FileFetcher.kt
@ -0,0 +1,35 @@
+package eu.kanade.tachiyomi.data.glide
+
+import com.bumptech.glide.Priority
+import com.bumptech.glide.load.data.DataFetcher
+import java.io.File
+import java.io.IOException
+import java.io.InputStream
+
+open class FileFetcher(private val file: File) : DataFetcher<InputStream> {
+
+    private var data: InputStream? = null
+
+    override fun loadData(priority: Priority): InputStream {
+        data = file.inputStream()
+        return data!!
+    }
+
+    override fun cleanup() {
+        data?.let { data ->
+            try {
+                data.close()
+            } catch (e: IOException) {
+                // Ignore
+            }
+        }
+    }
+
+    override fun cancel() {
+        // Do nothing.
+    }
+
+    override fun getId(): String {
+        return file.toString()
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/glide/MangaFileFetcher.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/glide/MangaFileFetcher.kt
@ -0,0 +1,18 @@
+package eu.kanade.tachiyomi.data.glide
+
+import eu.kanade.tachiyomi.data.database.models.Manga
+import java.io.File
+
+open class MangaFileFetcher(private val file: File, private val manga: Manga) : FileFetcher(file) {
+
+    /**
+     * Returns the id for this manga's cover.
+     *
+     * Appending the file's modified date to the url, we can force Glide to skip its memory and disk
+     * lookup step and fetch from our custom cache. This allows us to invalidate Glide's cache when
+     * the file has changed. If the file doesn't exist it will append a 0.
+     */
+    override fun getId(): String {
+        return manga.thumbnail_url + file.lastModified()
+    }
+}
--- a/app/src/main/java/eu/kanade/tachiyomi/data/glide/MangaModelLoader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/glide/MangaModelLoader.kt
@ -0,0 +1,130 @@
+package eu.kanade.tachiyomi.data.glide
+
+import android.content.Context
+import android.util.LruCache
+import com.bumptech.glide.Glide
+import com.bumptech.glide.integration.okhttp3.OkHttpStreamFetcher
+import com.bumptech.glide.load.data.DataFetcher
+import com.bumptech.glide.load.model.*
+import com.bumptech.glide.load.model.stream.StreamModelLoader
+import eu.kanade.tachiyomi.data.cache.CoverCache
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.source.online.HttpSource
+import uy.kohesive.injekt.injectLazy
+import java.io.File
+import java.io.InputStream
+
+/**
+ * A class for loading a cover associated with a [Manga] that can be present in our own cache.
+ * Coupled with [MangaUrlFetcher], this class allows to implement the following flow:
+ *
+ * - Check in RAM LRU.
+ * - Check in disk LRU.
+ * - Check in this module.
+ * - Fetch from the network connection.
+ *
+ * @param context the application context.
+ */
+class MangaModelLoader(context: Context) : StreamModelLoader<Manga> {
+
+    /**
+     * Cover cache where persistent covers are stored.
+     */
+    private val coverCache: CoverCache by injectLazy()
+
+    /**
+     * Source manager.
+     */
+    private val sourceManager: SourceManager by injectLazy()
+
+    /**
+     * Base network loader.
+     */
+    private val baseUrlLoader = Glide.buildModelLoader(GlideUrl::class.java,
+            InputStream::class.java, context)
+
+    /**
+     * LRU cache whose key is the thumbnail url of the manga, and the value contains the request url
+     * and the file where it should be stored in case the manga is a favorite.
+     */
+    private val lruCache = LruCache<String, Pair<GlideUrl, File>>(100)
+
+    /**
+     * Map where request headers are stored for a source.
+     */
+    private val cachedHeaders = hashMapOf<Long, LazyHeaders>()
+
+    /**
+     * Factory class for creating [MangaModelLoader] instances.
+     */
+    class Factory : ModelLoaderFactory<Manga, InputStream> {
+
+        override fun build(context: Context, factories: GenericLoaderFactory)
+                = MangaModelLoader(context)
+
+        override fun teardown() {}
+    }
+
+    /**
+     * Returns a fetcher for the given manga or null if the url is empty.
+     *
+     * @param manga the model.
+     * @param width the width of the view where the resource will be loaded.
+     * @param height the height of the view where the resource will be loaded.
+     */
+    override fun getResourceFetcher(manga: Manga,
+                                    width: Int,
+                                    height: Int): DataFetcher<InputStream>? {
+
+        // Check thumbnail is not null or empty
+        val url = manga.thumbnail_url
+        if (url == null || url.isEmpty()) {
+            return null
+        }
+
+        if (url.startsWith("http")) {
+            val source = sourceManager.get(manga.source) as? HttpSource
+
+            // Obtain the request url and the file for this url from the LRU cache, or calculate it
+            // and add them to the cache.
+            val (glideUrl, file) = lruCache.get(url) ?:
+                    Pair(GlideUrl(url, getHeaders(manga, source)), coverCache.getCoverFile(url)).apply {
+                        lruCache.put(url, this)
+                    }
+
+            // Get the resource fetcher for this request url.
+            val networkFetcher = source?.let { OkHttpStreamFetcher(it.client, glideUrl) }
+                ?: baseUrlLoader.getResourceFetcher(glideUrl, width, height)
+
+            // Return an instance of the fetcher providing the needed elements.
+            return MangaUrlFetcher(networkFetcher, file, manga)
+        } else {
+            // Get the file from the url, removing the scheme if present.
+            val file = File(url.substringAfter("file://"))
+
+            // Return an instance of the fetcher providing the needed elements.
+            return MangaFileFetcher(file, manga)
+        }
+    }
+
+    /**
+     * Returns the request headers for a source copying its OkHttp headers and caching them.
+     *
+     * @param manga the model.
+     */
+    fun getHeaders(manga: Manga, source: HttpSource?): Headers {
+        if (source == null) return LazyHeaders.DEFAULT
+
+        return cachedHeaders.getOrPut(manga.source) {
+            LazyHeaders.Builder().apply {
+                val nullStr: String? = null
+                setHeader("User-Agent", nullStr)
+                for ((key, value) in source.headers.toMultimap()) {
+                    addHeader(key, value[0])
+                }
+            }.build()
+        }
+    }
+
+}
--- a/Show More
+++ b/Show More