feat: db changes to accommodate new cross device syncing logic. (#450)

* feat: db changes to accommodate new syncing logic.

Using timestamp to sync is a bit skewed due to system clock etc and therefore there was a lot of issues with it such as removing a manga that shouldn't have been removed. Marking chapters as unread even though it was marked as a read. Hopefully by using versioning system it should eliminate those issues.

* chore: add new line.

* chore: remove isSyncing from Chapter/Manga model.

* chore: remove isSyncing leftover.

* chore: remove isSyncing.

* refactor: remove isSync guard.

Just use it directly to 1 now since we don't have the isSyncing field in Manga or Chapter.

* Lint and stuff

* Add missing ,

---------

Co-authored-by: AntsyLich <59261191+AntsyLich@users.noreply.github.com>

app/build.gradle.kts

@@ -22,7 +22,7 @@ android {
     defaultConfig {
         applicationId = "app.mihon"
 
-        versionCode = 5
+        versionCode = 6
         versionName = "0.16.4"
 
         buildConfigField("String", "COMMIT_COUNT", "\"${getCommitCount()}\"")

app/src/main/java/eu/kanade/tachiyomi/data/backup/create/creators/MangaBackupCreator.kt

@@ -98,4 +98,5 @@ private fun Manga.toBackupManga() =
         updateStrategy = this.updateStrategy,
         lastModifiedAt = this.lastModifiedAt,
         favoriteModifiedAt = this.favoriteModifiedAt,
+        version = this.version,
     )

app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt

@@ -4,6 +4,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.protobuf.ProtoNumber
 import tachiyomi.domain.chapter.model.Chapter
 
+@Suppress("MagicNumber")
 @Serializable
 data class BackupChapter(
     // in 1.x some of these values have different names
@@ -21,6 +22,7 @@ data class BackupChapter(
     @ProtoNumber(9) var chapterNumber: Float = 0F,
     @ProtoNumber(10) var sourceOrder: Long = 0,
     @ProtoNumber(11) var lastModifiedAt: Long = 0,
+    @ProtoNumber(12) var version: Long = 0,
 ) {
     fun toChapterImpl(): Chapter {
         return Chapter.create().copy(
@@ -35,6 +37,7 @@ data class BackupChapter(
             dateUpload = this@BackupChapter.dateUpload,
             sourceOrder = this@BackupChapter.sourceOrder,
             lastModifiedAt = this@BackupChapter.lastModifiedAt,
+            version = this@BackupChapter.version,
         )
     }
 }
@@ -53,6 +56,8 @@ val backupChapterMapper = {
         dateFetch: Long,
         dateUpload: Long,
         lastModifiedAt: Long,
+        version: Long,
+        _: Long,
     ->
     BackupChapter(
         url = url,
@@ -66,5 +71,6 @@ val backupChapterMapper = {
         dateUpload = dateUpload,
         sourceOrder = sourceOrder,
         lastModifiedAt = lastModifiedAt,
+        version = version,
     )
 }

app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt

@@ -5,7 +5,10 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.protobuf.ProtoNumber
 import tachiyomi.domain.manga.model.Manga
 
-@Suppress("DEPRECATION")
+@Suppress(
+    "DEPRECATION",
+    "MagicNumber",
+)
 @Serializable
 data class BackupManga(
     // in 1.x some of these values have different names
@@ -39,6 +42,7 @@ data class BackupManga(
     @ProtoNumber(106) var lastModifiedAt: Long = 0,
     @ProtoNumber(107) var favoriteModifiedAt: Long? = null,
     @ProtoNumber(108) var excludedScanlators: List<String> = emptyList(),
+    @ProtoNumber(109) var version: Long = 0,
 ) {
     fun getMangaImpl(): Manga {
         return Manga.create().copy(
@@ -58,6 +62,7 @@ data class BackupManga(
             updateStrategy = this@BackupManga.updateStrategy,
             lastModifiedAt = this@BackupManga.lastModifiedAt,
             favoriteModifiedAt = this@BackupManga.favoriteModifiedAt,
+            version = this@BackupManga.version,
         )
     }
 }

app/src/main/java/eu/kanade/tachiyomi/data/backup/restore/restorers/MangaRestorer.kt

@@ -83,7 +83,7 @@ class MangaRestorer(
     }
 
     private suspend fun restoreExistingManga(manga: Manga, dbManga: Manga): Manga {
-        return if (manga.lastModifiedAt > dbManga.lastModifiedAt) {
+        return if (manga.version > dbManga.version) {
             updateManga(dbManga.copyFrom(manga).copy(id = dbManga.id))
         } else {
             updateManga(manga.copyFrom(dbManga).copy(id = dbManga.id))
@@ -100,6 +100,7 @@ class MangaRestorer(
             thumbnailUrl = newer.thumbnailUrl,
             status = newer.status,
             initialized = this.initialized || newer.initialized,
+            version = newer.version,
         )
     }
 
@@ -126,6 +127,8 @@ class MangaRestorer(
                 dateAdded = manga.dateAdded,
                 mangaId = manga.id,
                 updateStrategy = manga.updateStrategy.let(UpdateStrategyColumnAdapter::encode),
+                version = manga.version,
+                isSyncing = 1,
             )
         }
         return manga
@@ -137,6 +140,7 @@ class MangaRestorer(
         return manga.copy(
             initialized = manga.description != null,
             id = insertManga(manga),
+            version = manga.version,
         )
     }
 
@@ -183,7 +187,7 @@ class MangaRestorer(
     }
 
     private fun Chapter.forComparison() =
-        this.copy(id = 0L, mangaId = 0L, dateFetch = 0L, dateUpload = 0L, lastModifiedAt = 0L)
+        this.copy(id = 0L, mangaId = 0L, dateFetch = 0L, dateUpload = 0L, lastModifiedAt = 0L, version = 0L)
 
     private suspend fun insertNewChapters(chapters: List<Chapter>) {
         handler.await(true) {
@@ -200,6 +204,7 @@ class MangaRestorer(
                     chapter.sourceOrder,
                     chapter.dateFetch,
                     chapter.dateUpload,
+                    chapter.version,
                 )
             }
         }
@@ -221,6 +226,8 @@ class MangaRestorer(
                     dateFetch = null,
                     dateUpload = null,
                     chapterId = chapter.id,
+                    version = chapter.version,
+                    isSyncing = 0,
                 )
             }
         }
@@ -253,6 +260,7 @@ class MangaRestorer(
                 coverLastModified = manga.coverLastModified,
                 dateAdded = manga.dateAdded,
                 updateStrategy = manga.updateStrategy,
+                version = manga.version,
             )
             mangasQueries.selectLastInsertedRowId()
         }

app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.kt

@@ -21,6 +21,8 @@ interface Chapter : SChapter, Serializable {
     var source_order: Int
 
     var last_modified: Long
+
+    var version: Long
 }
 
 fun Chapter.toDomainChapter(): DomainChapter? {
@@ -39,5 +41,6 @@ fun Chapter.toDomainChapter(): DomainChapter? {
         chapterNumber = chapter_number.toDouble(),
         scanlator = scanlator,
         lastModifiedAt = last_modified,
+        version = version,
     )
 }

app/src/main/java/eu/kanade/tachiyomi/data/database/models/ChapterImpl.kt

@@ -28,6 +28,8 @@ class ChapterImpl : Chapter {
 
     override var last_modified: Long = 0
 
+    override var version: Long = 0
+
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
         if (other == null || javaClass != other.javaClass) return false