Refactor download service

app/src/main/java/org/koitharu/kotatsu/core/parser/MangaRepository.kt

@@ -1,5 +1,8 @@
 package org.koitharu.kotatsu.core.parser
 
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.get
+import org.koin.core.qualifier.named
 import org.koitharu.kotatsu.core.model.*
 
 interface MangaRepository {
@@ -20,4 +23,11 @@ interface MangaRepository {
 	suspend fun getPageUrl(page: MangaPage): String
 
 	suspend fun getTags(): Set<MangaTag>
+
+	companion object : KoinComponent {
+
+		operator fun invoke(source: MangaSource): MangaRepository {
+			return get(named(source))
+		}
+	}
 }

app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsFragment.kt

@@ -23,13 +23,13 @@ import org.koitharu.kotatsu.base.ui.BaseFragment
 import org.koitharu.kotatsu.base.ui.widgets.ChipsView
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaHistory
+import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.databinding.FragmentDetailsBinding
 import org.koitharu.kotatsu.favourites.ui.categories.select.FavouriteCategoriesDialog
 import org.koitharu.kotatsu.reader.ui.ReaderActivity
 import org.koitharu.kotatsu.reader.ui.ReaderState
 import org.koitharu.kotatsu.utils.FileSizeUtils
 import org.koitharu.kotatsu.utils.ext.*
-import kotlin.math.roundToInt
 
 class DetailsFragment : BaseFragment<FragmentDetailsBinding>(), View.OnClickListener,
 	View.OnLongClickListener {
@@ -62,6 +62,7 @@ class DetailsFragment : BaseFragment<FragmentDetailsBinding>(), View.OnClickList
 			textViewTitle.text = manga.title
 			textViewSubtitle.textAndVisible = manga.altTitle
 			textViewAuthor.textAndVisible = manga.author
+			sourceContainer.isVisible = manga.source != MangaSource.LOCAL
 			textViewSource.text = manga.source.title
 			textViewDescription.text =
 				manga.description?.parseAsHtml()?.takeUnless(Spanned::isBlank)

app/src/main/java/org/koitharu/kotatsu/download/DownloadManager.kt

@@ -0,0 +1,230 @@
+package org.koitharu.kotatsu.download
+
+import android.content.Context
+import android.graphics.drawable.Drawable
+import android.net.ConnectivityManager
+import android.webkit.MimeTypeMap
+import coil.ImageLoader
+import coil.request.ImageRequest
+import kotlinx.coroutines.*
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.flow
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okio.IOException
+import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.model.Manga
+import org.koitharu.kotatsu.core.network.CommonHeaders
+import org.koitharu.kotatsu.core.parser.MangaRepository
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.local.data.MangaZip
+import org.koitharu.kotatsu.local.data.PagesCache
+import org.koitharu.kotatsu.local.domain.LocalMangaRepository
+import org.koitharu.kotatsu.utils.CacheUtils
+import org.koitharu.kotatsu.utils.ext.await
+import org.koitharu.kotatsu.utils.ext.deleteAwait
+import org.koitharu.kotatsu.utils.ext.waitForNetwork
+import java.io.File
+
+class DownloadManager(
+	private val context: Context,
+	private val settings: AppSettings,
+	private val imageLoader: ImageLoader,
+	private val okHttp: OkHttpClient,
+	private val cache: PagesCache,
+	private val localMangaRepository: LocalMangaRepository,
+) {
+
+	private val connectivityManager = context.getSystemService(
+		Context.CONNECTIVITY_SERVICE
+	) as ConnectivityManager
+	private val coverWidth = context.resources.getDimensionPixelSize(
+		androidx.core.R.dimen.compat_notification_large_icon_max_width
+	)
+	private val coverHeight = context.resources.getDimensionPixelSize(
+		androidx.core.R.dimen.compat_notification_large_icon_max_height
+	)
+
+	fun downloadManga(manga: Manga, chaptersIds: Set<Long>?, startId: Int): Flow<State> = flow {
+		emit(State.Preparing(startId, manga, null))
+		var cover: Drawable? = null
+		val destination = settings.getStorageDir(context)
+		checkNotNull(destination) { context.getString(R.string.cannot_find_available_storage) }
+		var output: MangaZip? = null
+		try {
+			val repo = MangaRepository(manga.source)
+			cover = runCatching {
+				imageLoader.execute(
+					ImageRequest.Builder(context)
+						.data(manga.coverUrl)
+						.size(coverWidth, coverHeight)
+						.build()
+				).drawable
+			}.getOrNull()
+			emit(State.Preparing(startId, manga, cover))
+			val data = if (manga.chapters == null) repo.getDetails(manga) else manga
+			output = MangaZip.findInDir(destination, data)
+			output.prepare(data)
+			val coverUrl = data.largeCoverUrl ?: data.coverUrl
+			downloadFile(coverUrl, data.publicUrl, destination).let { file ->
+				output.addCover(file, MimeTypeMap.getFileExtensionFromUrl(coverUrl))
+			}
+			val chapters = if (chaptersIds == null) {
+				data.chapters.orEmpty()
+			} else {
+				data.chapters.orEmpty().filter { x -> x.id in chaptersIds }
+			}
+			for ((chapterIndex, chapter) in chapters.withIndex()) {
+				if (chaptersIds == null || chapter.id in chaptersIds) {
+					val pages = repo.getPages(chapter)
+					for ((pageIndex, page) in pages.withIndex()) {
+						failsafe@ do {
+							try {
+								val url = repo.getPageUrl(page)
+								val file =
+									cache[url] ?: downloadFile(url, page.referer, destination)
+								output.addPage(
+									chapter,
+									file,
+									pageIndex,
+									MimeTypeMap.getFileExtensionFromUrl(url)
+								)
+							} catch (e: IOException) {
+								emit(State.WaitingForNetwork(startId, manga, cover))
+								connectivityManager.waitForNetwork()
+								continue@failsafe
+							}
+						} while (false)
+
+						emit(State.Progress(startId, manga, cover,
+							totalChapters = chapters.size,
+							currentChapter = chapterIndex,
+							totalPages = pages.size,
+							currentPage = pageIndex,
+						))
+					}
+				}
+			}
+			emit(State.PostProcessing(startId, manga, cover))
+			if (!output.compress()) {
+				throw RuntimeException("Cannot create target file")
+			}
+			val localManga = localMangaRepository.getFromFile(output.file)
+			emit(State.Done(startId, manga, cover, localManga))
+		} catch (_: CancellationException) {
+			emit(State.Cancelling(startId, manga, cover))
+		} catch (e: Throwable) {
+			if (BuildConfig.DEBUG) {
+				e.printStackTrace()
+			}
+			emit(State.Error(startId, manga, cover, e))
+		} finally {
+			withContext(NonCancellable) {
+				output?.cleanup()
+				File(destination, TEMP_PAGE_FILE).deleteAwait()
+			}
+		}
+	}.catch { e ->
+		emit(State.Error(startId, manga, null, e))
+	}
+
+	private suspend fun downloadFile(url: String, referer: String, destination: File): File {
+		val request = Request.Builder()
+			.url(url)
+			.header(CommonHeaders.REFERER, referer)
+			.cacheControl(CacheUtils.CONTROL_DISABLED)
+			.get()
+			.build()
+		val call = okHttp.newCall(request)
+		var attempts = MAX_DOWNLOAD_ATTEMPTS
+		val file = File(destination, TEMP_PAGE_FILE)
+		while (true) {
+			try {
+				val response = call.clone().await()
+				withContext(Dispatchers.IO) {
+					file.outputStream().use { out ->
+						checkNotNull(response.body).byteStream().copyTo(out)
+					}
+				}
+				return file
+			} catch (e: IOException) {
+				attempts--
+				if (attempts <= 0) {
+					throw e
+				} else {
+					delay(DOWNLOAD_ERROR_DELAY)
+				}
+			}
+		}
+	}
+
+	sealed interface State {
+
+		val startId: Int
+		val manga: Manga
+		val cover: Drawable?
+
+		data class Queued(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+		) : State
+
+		data class Preparing(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+		) : State
+
+		data class Progress(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+			val totalChapters: Int,
+			val currentChapter: Int,
+			val totalPages: Int,
+			val currentPage: Int,
+		): State
+
+		data class WaitingForNetwork(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+		): State
+
+		data class Done(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+			val localManga: Manga,
+		) : State
+
+		data class Error(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+			val error: Throwable,
+		) : State
+
+		data class Cancelling(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+		): State
+
+		data class PostProcessing(
+			override val startId: Int,
+			override val manga: Manga,
+			override val cover: Drawable?,
+		) : State
+	}
+
+	private companion object {
+
+		private const val MAX_DOWNLOAD_ATTEMPTS = 3
+		private const val DOWNLOAD_ERROR_DELAY = 500L
+		private const val TEMP_PAGE_FILE = "page.tmp"
+	}
+}

app/src/main/java/org/koitharu/kotatsu/download/DownloadNotification.kt

@@ -5,9 +5,9 @@ import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
-import android.graphics.drawable.Drawable
 import android.os.Build
 import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.toBitmap
 import org.koitharu.kotatsu.R
@@ -17,137 +17,126 @@ import org.koitharu.kotatsu.utils.PendingIntentCompat
 import org.koitharu.kotatsu.utils.ext.getDisplayMessage
 import kotlin.math.roundToInt
 
-class DownloadNotification(private val context: Context) {
+class DownloadNotification(
+	private val context: Context,
+	startId: Int,
+) {
 
 	private val builder = NotificationCompat.Builder(context, CHANNEL_ID)
-	private val manager =
-		context.applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+	private val cancelAction = NotificationCompat.Action(
+		R.drawable.ic_cross,
+		context.getString(android.R.string.cancel),
+		PendingIntent.getService(
+			context,
+			startId,
+			DownloadService.getCancelIntent(context, startId),
+			PendingIntent.FLAG_CANCEL_CURRENT or PendingIntentCompat.FLAG_IMMUTABLE
+		)
+	)
 
 	init {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
-			&& manager.getNotificationChannel(CHANNEL_ID) == null
-		) {
-			val channel = NotificationChannel(
-				CHANNEL_ID,
-				context.getString(R.string.downloads),
-				NotificationManager.IMPORTANCE_LOW
-			)
-			channel.enableVibration(false)
-			channel.enableLights(false)
-			channel.setSound(null, null)
-			manager.createNotificationChannel(channel)
-		}
 		builder.setOnlyAlertOnce(true)
 		builder.setDefaults(0)
 		builder.color = ContextCompat.getColor(context, R.color.blue_primary)
 	}
 
-	fun fillFrom(manga: Manga) {
-		builder.setContentTitle(manga.title)
+	fun create(state: DownloadManager.State): Notification {
+		builder.setContentTitle(state.manga.title)
 		builder.setContentText(context.getString(R.string.manga_downloading_))
 		builder.setProgress(1, 0, true)
 		builder.setSmallIcon(android.R.drawable.stat_sys_download)
-		builder.setLargeIcon(null)
 		builder.setContentIntent(null)
 		builder.setStyle(null)
-	}
-
-	fun setCancelId(startId: Int) {
-		if (startId == 0) {
-			builder.clearActions()
-		} else {
-			val intent = DownloadService.getCancelIntent(context, startId)
-			builder.addAction(
-				R.drawable.ic_cross,
-				context.getString(android.R.string.cancel),
-				PendingIntent.getService(
-					context,
-					startId,
-					intent,
-					PendingIntent.FLAG_CANCEL_CURRENT or PendingIntentCompat.FLAG_IMMUTABLE
-				)
-			)
+		builder.setLargeIcon(state.cover?.toBitmap())
+		builder.clearActions()
+		when (state) {
+			is DownloadManager.State.Cancelling -> {
+				builder.setProgress(1, 0, true)
+				builder.setContentText(context.getString(R.string.cancelling_))
+				builder.setContentIntent(null)
+				builder.setStyle(null)
+			}
+			is DownloadManager.State.Done -> {
+				builder.setProgress(0, 0, false)
+				builder.setContentText(context.getString(R.string.download_complete))
+				builder.setContentIntent(createMangaIntent(context, state.localManga))
+				builder.setAutoCancel(true)
+				builder.setSmallIcon(android.R.drawable.stat_sys_download_done)
+				builder.setCategory(null)
+				builder.setStyle(null)
+			}
+			is DownloadManager.State.Error -> {
+				val message = state.error.getDisplayMessage(context.resources)
+				builder.setProgress(0, 0, false)
+				builder.setSmallIcon(android.R.drawable.stat_notify_error)
+				builder.setSubText(context.getString(R.string.error))
+				builder.setContentText(message)
+				builder.setAutoCancel(true)
+				builder.setContentIntent(null)
+				builder.setCategory(NotificationCompat.CATEGORY_ERROR)
+				builder.setStyle(NotificationCompat.BigTextStyle().bigText(message))
+			}
+			is DownloadManager.State.PostProcessing -> {
+				builder.setProgress(1, 0, true)
+				builder.setContentText(context.getString(R.string.processing_))
+				builder.setStyle(null)
+			}
+			is DownloadManager.State.Queued,
+			is DownloadManager.State.Preparing -> {
+				builder.setProgress(1, 0, true)
+				builder.setContentText(context.getString(R.string.preparing_))
+				builder.setStyle(null)
+				builder.addAction(cancelAction)
+			}
+			is DownloadManager.State.Progress -> {
+				val max = state.totalChapters * PROGRESS_STEP
+				val progress = state.currentChapter * PROGRESS_STEP +
+						(state.currentPage / state.totalPages.toFloat() * PROGRESS_STEP)
+							.roundToInt()
+				val percent = (progress / max.toFloat() * 100).roundToInt()
+				builder.setProgress(max, progress, false)
+				builder.setContentText("%d%%".format(percent))
+				builder.setCategory(NotificationCompat.CATEGORY_PROGRESS)
+				builder.setStyle(null)
+				builder.addAction(cancelAction)
+			}
+			is DownloadManager.State.WaitingForNetwork -> {
+				builder.setProgress(0, 0, false)
+				builder.setContentText(context.getString(R.string.waiting_for_network))
+				builder.setStyle(null)
+				builder.addAction(cancelAction)
+			}
 		}
+		return builder.build()
 	}
 
-	fun setError(e: Throwable) {
-		val message = e.getDisplayMessage(context.resources)
-		builder.setProgress(0, 0, false)
-		builder.setSmallIcon(android.R.drawable.stat_notify_error)
-		builder.setSubText(context.getString(R.string.error))
-		builder.setContentText(message)
-		builder.setAutoCancel(true)
-		builder.setContentIntent(null)
-		builder.setCategory(NotificationCompat.CATEGORY_ERROR)
-		builder.setStyle(NotificationCompat.BigTextStyle().bigText(message))
-	}
-
-	fun setLargeIcon(icon: Drawable?) {
-		builder.setLargeIcon(icon?.toBitmap())
-	}
-
-	fun setProgress(chaptersTotal: Int, pagesTotal: Int, chapter: Int, page: Int) {
-		val max = chaptersTotal * PROGRESS_STEP
-		val progress =
-			chapter * PROGRESS_STEP + (page / pagesTotal.toFloat() * PROGRESS_STEP).roundToInt()
-		val percent = (progress / max.toFloat() * 100).roundToInt()
-		builder.setProgress(max, progress, false)
-		builder.setContentText("%d%%".format(percent))
-		builder.setCategory(NotificationCompat.CATEGORY_PROGRESS)
-		builder.setStyle(null)
-	}
-
-	fun setWaitingForNetwork() {
-		builder.setProgress(0, 0, false)
-		builder.setContentText(context.getString(R.string.waiting_for_network))
-		builder.setStyle(null)
-	}
-
-	fun setPostProcessing() {
-		builder.setProgress(1, 0, true)
-		builder.setContentText(context.getString(R.string.processing_))
-		builder.setStyle(null)
-	}
-
-	fun setDone(manga: Manga) {
-		builder.setProgress(0, 0, false)
-		builder.setContentText(context.getString(R.string.download_complete))
-		builder.setContentIntent(createIntent(context, manga))
-		builder.setAutoCancel(true)
-		builder.setSmallIcon(android.R.drawable.stat_sys_download_done)
-		builder.setCategory(null)
-		builder.setStyle(null)
-	}
-
-	fun setCancelling() {
-		builder.setProgress(1, 0, true)
-		builder.setContentText(context.getString(R.string.cancelling_))
-		builder.setContentIntent(null)
-		builder.setStyle(null)
-	}
-
-	fun update(id: Int = NOTIFICATION_ID) {
-		manager.notify(id, builder.build())
-	}
-
-	fun dismiss(id: Int = NOTIFICATION_ID) {
-		manager.cancel(id)
-	}
-
-	operator fun invoke(): Notification = builder.build()
+	private fun createMangaIntent(context: Context, manga: Manga) = PendingIntent.getActivity(
+		context,
+		manga.hashCode(),
+		DetailsActivity.newIntent(context, manga),
+		PendingIntent.FLAG_CANCEL_CURRENT or PendingIntentCompat.FLAG_IMMUTABLE
+	)
 
 	companion object {
 
-		const val NOTIFICATION_ID = 201
-		const val CHANNEL_ID = "download"
-
+		private const val CHANNEL_ID = "download"
 		private const val PROGRESS_STEP = 20
 
-		private fun createIntent(context: Context, manga: Manga) = PendingIntent.getActivity(
-			context,
-			manga.hashCode(),
-			DetailsActivity.newIntent(context, manga),
-			PendingIntent.FLAG_CANCEL_CURRENT or PendingIntentCompat.FLAG_IMMUTABLE
-		)
+		fun createChannel(context: Context) {
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+				val manager = NotificationManagerCompat.from(context)
+				if (manager.getNotificationChannel(CHANNEL_ID) == null) {
+					val channel = NotificationChannel(
+						CHANNEL_ID,
+						context.getString(R.string.downloads),
+						NotificationManager.IMPORTANCE_LOW
+					)
+					channel.enableVibration(false)
+					channel.enableLights(false)
+					channel.setSound(null, null)
+					manager.createNotificationChannel(channel)
+				}
+			}
+		}
 	}
 }

app/src/main/java/org/koitharu/kotatsu/download/DownloadService.kt

@@ -3,57 +3,51 @@ package org.koitharu.kotatsu.download
 import android.content.Context
 import android.content.Intent
 import android.net.ConnectivityManager
+import android.os.Binder
+import android.os.IBinder
 import android.os.PowerManager
-import android.webkit.MimeTypeMap
 import android.widget.Toast
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.app.ServiceCompat
 import androidx.core.content.ContextCompat
 import androidx.lifecycle.lifecycleScope
-import coil.ImageLoader
-import coil.request.ImageRequest
 import kotlinx.coroutines.*
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.sync.Mutex
-import okhttp3.OkHttpClient
-import okhttp3.Request
-import okio.IOException
+import kotlinx.coroutines.sync.withLock
 import org.koin.android.ext.android.get
-import org.koin.android.ext.android.inject
 import org.koin.core.context.GlobalContext
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseService
 import org.koitharu.kotatsu.base.ui.dialog.CheckBoxAlertDialog
 import org.koitharu.kotatsu.core.model.Manga
-import org.koitharu.kotatsu.core.network.CommonHeaders
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.local.data.MangaZip
-import org.koitharu.kotatsu.local.data.PagesCache
-import org.koitharu.kotatsu.local.domain.LocalMangaRepository
-import org.koitharu.kotatsu.utils.CacheUtils
-import org.koitharu.kotatsu.utils.ext.*
-import java.io.File
+import org.koitharu.kotatsu.utils.LiveStateFlow
+import org.koitharu.kotatsu.utils.ext.toArraySet
+import java.util.concurrent.Executors
 import java.util.concurrent.TimeUnit
 import kotlin.collections.set
-import kotlin.math.absoluteValue
 
 class DownloadService : BaseService() {
 
-	private lateinit var notification: DownloadNotification
+	private lateinit var notificationManager: NotificationManagerCompat
 	private lateinit var wakeLock: PowerManager.WakeLock
-	private lateinit var connectivityManager: ConnectivityManager
+	private lateinit var downloadManager: DownloadManager
+	private lateinit var dispatcher: ExecutorCoroutineDispatcher
 
-	private val okHttp by inject<OkHttpClient>()
-	private val cache by inject<PagesCache>()
-	private val settings by inject<AppSettings>()
-	private val imageLoader by inject<ImageLoader>()
-	private val jobs = HashMap<Int, Job>()
+	private val jobs = HashMap<Int, LiveStateFlow<DownloadManager.State>>()
 	private val mutex = Mutex()
 
 	override fun onCreate() {
 		super.onCreate()
-		notification = DownloadNotification(this)
-		connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+		notificationManager = NotificationManagerCompat.from(this)
 		wakeLock = (getSystemService(Context.POWER_SERVICE) as PowerManager)
 			.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "kotatsu:downloading")
+		downloadManager = DownloadManager(this, get(), get(), get(), get(), get())
+		dispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
+		DownloadNotification.createChannel(this)
 	}
 
 	override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -63,8 +57,9 @@ class DownloadService : BaseService() {
 				val manga = intent.getParcelableExtra<Manga>(EXTRA_MANGA)
 				val chapters = intent.getLongArrayExtra(EXTRA_CHAPTERS_IDS)?.toArraySet()
 				if (manga != null) {
-					jobs[startId] = downloadManga(manga, chapters, startId)
+					jobs[startId] = downloadManga(startId, manga, chapters)
 					Toast.makeText(this, R.string.manga_downloading_, Toast.LENGTH_SHORT).show()
+					return START_REDELIVER_INTENT
 				} else {
 					stopSelf(startId)
 				}
@@ -79,144 +74,59 @@ class DownloadService : BaseService() {
 		return START_NOT_STICKY
 	}
 
-	private fun downloadManga(manga: Manga, chaptersIds: Set<Long>?, startId: Int): Job {
-		return lifecycleScope.launch(Dispatchers.Default) {
-			mutex.lock()
-			wakeLock.acquire(TimeUnit.HOURS.toMillis(1))
-			notification.fillFrom(manga)
-			notification.setCancelId(startId)
-			withContext(Dispatchers.Main) {
-				startForeground(DownloadNotification.NOTIFICATION_ID, notification())
-			}
-			val destination = settings.getStorageDir(this@DownloadService)
-			checkNotNull(destination) { getString(R.string.cannot_find_available_storage) }
-			var output: MangaZip? = null
-			try {
-				val repo = mangaRepositoryOf(manga.source)
-				val cover = runCatching {
-					imageLoader.execute(
-						ImageRequest.Builder(this@DownloadService)
-							.data(manga.coverUrl)
-							.build()
-					).drawable
-				}.getOrNull()
-				notification.setLargeIcon(cover)
-				notification.update()
-				val data = if (manga.chapters == null) repo.getDetails(manga) else manga
-				output = MangaZip.findInDir(destination, data)
-				output.prepare(data)
-				val coverUrl = data.largeCoverUrl ?: data.coverUrl
-				downloadFile(coverUrl, data.publicUrl, destination).let { file ->
-					output.addCover(file, MimeTypeMap.getFileExtensionFromUrl(coverUrl))
-				}
-				val chapters = if (chaptersIds == null) {
-					data.chapters.orEmpty()
-				} else {
-					data.chapters.orEmpty().filter { x -> x.id in chaptersIds }
-				}
-				for ((chapterIndex, chapter) in chapters.withIndex()) {
-					if (chaptersIds == null || chapter.id in chaptersIds) {
-						val pages = repo.getPages(chapter)
-						for ((pageIndex, page) in pages.withIndex()) {
-							failsafe@ do {
-								try {
-									val url = repo.getPageUrl(page)
-									val file =
-										cache[url] ?: downloadFile(url, page.referer, destination)
-									output.addPage(
-										chapter,
-										file,
-										pageIndex,
-										MimeTypeMap.getFileExtensionFromUrl(url)
-									)
-								} catch (e: IOException) {
-									notification.setWaitingForNetwork()
-									notification.update()
-									connectivityManager.waitForNetwork()
-									continue@failsafe
-								}
-							} while (false)
-							notification.setProgress(
-								chapters.size,
-								pages.size,
-								chapterIndex,
-								pageIndex
-							)
-							notification.update()
+	override fun onDestroy() {
+		super.onDestroy()
+		dispatcher.close()
+	}
+
+	override fun onBind(intent: Intent): IBinder {
+		super.onBind(intent)
+		return DownloadBinder()
+	}
+
+	private fun downloadManga(
+		startId: Int,
+		manga: Manga,
+		chaptersIds: Set<Long>?,
+	): LiveStateFlow<DownloadManager.State> {
+		val initialState = DownloadManager.State.Queued(startId, manga, null)
+		val stateFlow = MutableStateFlow<DownloadManager.State>(initialState)
+		val job = lifecycleScope.launch {
+			mutex.withLock {
+				wakeLock.acquire(TimeUnit.HOURS.toMillis(1))
+				val notification = DownloadNotification(this@DownloadService, startId)
+				startForeground(startId, notification.create(initialState))
+				try {
+					withContext(dispatcher) {
+						downloadManager.downloadManga(manga, chaptersIds, startId)
+							.collect { state ->
+								stateFlow.value = state
+								notificationManager.notify(startId, notification.create(state))
+							}
+					}
+				} finally {
+					ServiceCompat.stopForeground(
+						this@DownloadService,
+						if (isActive) {
+							ServiceCompat.STOP_FOREGROUND_DETACH
+						} else {
+							ServiceCompat.STOP_FOREGROUND_REMOVE
 						}
-					}
-				}
-				notification.setCancelId(0)
-				notification.setPostProcessing()
-				notification.update()
-				if (!output.compress()) {
-					throw RuntimeException("Cannot create target file")
-				}
-				val result = get<LocalMangaRepository>().getFromFile(output.file)
-				notification.setDone(result)
-				notification.dismiss()
-				notification.update(manga.id.toInt().absoluteValue)
-			} catch (_: CancellationException) {
-				withContext(NonCancellable) {
-					notification.setCancelling()
-					notification.setCancelId(0)
-					notification.update()
-				}
-			} catch (e: Throwable) {
-				if (BuildConfig.DEBUG) {
-					e.printStackTrace()
-				}
-				notification.setError(e)
-				notification.setCancelId(0)
-				notification.dismiss()
-				notification.update(manga.id.toInt().absoluteValue)
-			} finally {
-				withContext(NonCancellable) {
-					jobs.remove(startId)
-					output?.cleanup()
-					destination.sub(TEMP_PAGE_FILE).deleteAwait()
-					withContext(Dispatchers.Main) {
-						stopForeground(true)
-						notification.dismiss()
-						stopSelf(startId)
-					}
+					)
 					if (wakeLock.isHeld) {
 						wakeLock.release()
 					}
-					mutex.unlock()
+					stopSelf(startId)
 				}
 			}
 		}
+		return LiveStateFlow(stateFlow, job)
 	}
 
-	private suspend fun downloadFile(url: String, referer: String, destination: File): File {
-		val request = Request.Builder()
-			.url(url)
-			.header(CommonHeaders.REFERER, referer)
-			.cacheControl(CacheUtils.CONTROL_DISABLED)
-			.get()
-			.build()
-		val call = okHttp.newCall(request)
-		var attempts = MAX_DOWNLOAD_ATTEMPTS
-		val file = destination.sub(TEMP_PAGE_FILE)
-		while (true) {
-			try {
-				val response = call.clone().await()
-				withContext(Dispatchers.IO) {
-					file.outputStream().use { out ->
-						checkNotNull(response.body).byteStream().copyTo(out)
-					}
-				}
-				return file
-			} catch (e: IOException) {
-				attempts--
-				if (attempts <= 0) {
-					throw e
-				} else {
-					delay(DOWNLOAD_ERROR_DELAY)
-				}
-			}
-		}
+	inner class DownloadBinder : Binder() {
+
+		val downloads: Collection<LiveStateFlow<DownloadManager.State>>
+			get() = jobs.values
 	}
 
 	companion object {
@@ -230,10 +140,6 @@ class DownloadService : BaseService() {
 		private const val EXTRA_CHAPTERS_IDS = "chapters_ids"
 		private const val EXTRA_CANCEL_ID = "cancel_id"
 
-		private const val MAX_DOWNLOAD_ATTEMPTS = 3
-		private const val DOWNLOAD_ERROR_DELAY = 500L
-		private const val TEMP_PAGE_FILE = "page.tmp"
-
 		fun start(context: Context, manga: Manga, chaptersIds: Collection<Long>? = null) {
 			confirmDataTransfer(context) {
 				val intent = Intent(context, DownloadService::class.java)

app/src/main/java/org/koitharu/kotatsu/local/ui/LocalListViewModel.kt

@@ -14,10 +14,7 @@ import org.koitharu.kotatsu.core.os.ShortcutsRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.history.domain.HistoryRepository
 import org.koitharu.kotatsu.list.ui.MangaListViewModel
-import org.koitharu.kotatsu.list.ui.model.EmptyState
-import org.koitharu.kotatsu.list.ui.model.LoadingState
-import org.koitharu.kotatsu.list.ui.model.toErrorState
-import org.koitharu.kotatsu.list.ui.model.toUi
+import org.koitharu.kotatsu.list.ui.model.*
 import org.koitharu.kotatsu.local.domain.LocalMangaRepository
 import org.koitharu.kotatsu.utils.MediaStoreCompat
 import org.koitharu.kotatsu.utils.SingleLiveEvent
@@ -36,6 +33,7 @@ class LocalListViewModel(
 	val onMangaRemoved = SingleLiveEvent<Manga>()
 	private val listError = MutableStateFlow<Throwable?>(null)
 	private val mangaList = MutableStateFlow<List<Manga>?>(null)
+	private val headerModel = ListHeader(context.getString(R.string.local_storage))
 
 	override val content = combine(
 		mangaList,
@@ -46,7 +44,10 @@ class LocalListViewModel(
 			error != null -> listOf(error.toErrorState(canRetry = true))
 			list == null -> listOf(LoadingState)
 			list.isEmpty() -> listOf(EmptyState(R.drawable.ic_storage, R.string.text_local_holder_primary, R.string.text_local_holder_secondary))
-			else -> list.toUi(mode)
+			else -> ArrayList<ListModel>(list.size + 1).apply {
+				add(headerModel)
+				list.toUi(this, mode)
+			}
 		}
 	}.asLiveDataDistinct(
 		viewModelScope.coroutineContext + Dispatchers.Default,

app/src/main/java/org/koitharu/kotatsu/utils/LiveStateFlow.kt

@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.utils
+
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.StateFlow
+
+class LiveStateFlow<T>(
+	private val stateFlow: StateFlow<T>,
+	private val job: Job,
+) : StateFlow<T> by stateFlow, Job by job {
+
+
+}