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Use cache to complete downloads

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This commit is contained in:
Jay 2020-01-11 04:22:24 -08:00
parent 00b1b097a7
commit a5120edd0e
2 changed files with 38 additions and 8 deletions
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6
app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt vendored
View File

@ -151,10 +151,10 @@ class ChapterCache(private val context: Context) {
* @return true if in cache otherwise false.
*/
fun isImageInCache(imageUrl: String): Boolean {
try {
return diskCache.get(DiskUtil.hashKeyForDisk(imageUrl)) != null
return try {
diskCache.get(DiskUtil.hashKeyForDisk(imageUrl)) != null
} catch (e: IOException) {
return false
false
}
}

40
app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
View File

@ -1,10 +1,12 @@
package eu.kanade.tachiyomi.data.download
import android.content.Context
import android.net.Uri
import android.webkit.MimeTypeMap
import com.hippo.unifile.UniFile
import com.jakewharton.rxrelay.BehaviorRelay
import com.jakewharton.rxrelay.PublishRelay
import eu.kanade.tachiyomi.data.cache.ChapterCache
import eu.kanade.tachiyomi.data.database.models.Chapter
import eu.kanade.tachiyomi.data.database.models.Manga
import eu.kanade.tachiyomi.data.download.model.Download
@ -27,6 +29,7 @@ import rx.android.schedulers.AndroidSchedulers
import rx.schedulers.Schedulers
import rx.subscriptions.CompositeSubscription
import timber.log.Timber
import java.io.File
/**
* This class is the one in charge of downloading chapters.
@ -338,12 +341,14 @@ class Downloader(
// Try to find the image file.
val imageFile = tmpDir.listFiles()!!.find { it.name!!.startsWith("$filename.") }
val cache = ChapterCache(context)
// If the image is already downloaded, do nothing. Otherwise download from network
val pageObservable = if (imageFile != null)
Observable.just(imageFile)
else
downloadImage(page, download.source, tmpDir, filename)
val pageObservable = when {
imageFile != null -> Observable.just(imageFile)
cache.isImageInCache(page.imageUrl!!) ->
moveFromCache(page, cache.getImageFile(page.imageUrl!!), tmpDir, filename)
else -> downloadImage(page, download.source, tmpDir, filename)
}
return pageObservable
// When the image is ready, set image path, progress (just in case) and status
@ -362,6 +367,31 @@ class Downloader(
}
}
/**
* Returns the observable which takes from the downloaded image from cache
*
* @param page the page to download.
* @param file the file from cache
* @param tmpDir the temporary directory of the download.
* @param filename the filename of the image.
*/
private fun moveFromCache(page: Page, file: File, tmpDir: UniFile, filename: String):
Observable<UniFile> {
return Observable.just(file).map {
val tmpFile = tmpDir.createFile("$filename.tmp")
val inputStream = file.inputStream()
inputStream.use { input ->
tmpFile.openOutputStream().use { output ->
input.copyTo(output)
}
}
val extension = ImageUtil.findImageType(file.inputStream()) ?: return@map tmpFile
tmpFile.renameTo("$filename.${extension.extension}")
file.delete()
tmpFile
}
}
/**
* Returns the observable which downloads the image from network.
*