Refactor chapter tracking logic

Could probably call this if we ever make it update tracking on manually
marking chapters as read.

app/src/main/java/eu/kanade/domain/DomainModule.kt

@@ -16,6 +16,7 @@ import eu.kanade.domain.source.interactor.SetMigrateSorting
 import eu.kanade.domain.source.interactor.ToggleLanguage
 import eu.kanade.domain.source.interactor.ToggleSource
 import eu.kanade.domain.source.interactor.ToggleSourcePin
+import eu.kanade.domain.track.interactor.TrackChapter
 import tachiyomi.data.category.CategoryRepositoryImpl
 import tachiyomi.data.chapter.ChapterRepositoryImpl
 import tachiyomi.data.history.HistoryRepositoryImpl
@@ -109,6 +110,7 @@ class DomainModule : InjektModule {
         addFactory { GetApplicationRelease(get(), get()) }
 
         addSingletonFactory<TrackRepository> { TrackRepositoryImpl(get()) }
+        addFactory { TrackChapter(get(), get(), get(), get()) }
         addFactory { DeleteTrack(get()) }
         addFactory { GetTracksPerManga(get()) }
         addFactory { GetTracks(get()) }

app/src/main/java/eu/kanade/domain/track/interactor/TrackChapter.kt

@@ -0,0 +1,56 @@
+package eu.kanade.domain.track.interactor
+
+import android.content.Context
+import eu.kanade.domain.track.model.toDbTrack
+import eu.kanade.domain.track.service.DelayedTrackingUpdateJob
+import eu.kanade.domain.track.store.DelayedTrackingStore
+import eu.kanade.tachiyomi.data.track.TrackManager
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.coroutineScope
+import logcat.LogPriority
+import tachiyomi.core.util.lang.launchNonCancellable
+import tachiyomi.core.util.system.logcat
+import tachiyomi.domain.track.interactor.GetTracks
+import tachiyomi.domain.track.interactor.InsertTrack
+
+class TrackChapter(
+    private val getTracks: GetTracks,
+    private val trackManager: TrackManager,
+    private val insertTrack: InsertTrack,
+    private val delayedTrackingStore: DelayedTrackingStore,
+) {
+
+    suspend fun await(context: Context, mangaId: Long, chapterNumber: Double) = coroutineScope {
+        launchNonCancellable {
+            val tracks = getTracks.await(mangaId)
+
+            if (tracks.isEmpty()) return@launchNonCancellable
+
+            tracks.mapNotNull { track ->
+                val service = trackManager.getService(track.syncId)
+                if (service != null && service.isLogged && chapterNumber > track.lastChapterRead) {
+                    val updatedTrack = track.copy(lastChapterRead = chapterNumber)
+
+                    async {
+                        runCatching {
+                            try {
+                                service.update(updatedTrack.toDbTrack(), true)
+                                insertTrack.await(updatedTrack)
+                            } catch (e: Exception) {
+                                delayedTrackingStore.addItem(updatedTrack)
+                                DelayedTrackingUpdateJob.setupTask(context)
+                                throw e
+                            }
+                        }
+                    }
+                } else {
+                    null
+                }
+            }
+                .awaitAll()
+                .mapNotNull { it.exceptionOrNull() }
+                .forEach { logcat(LogPriority.INFO, it) }
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderViewModel.kt

@@ -10,10 +10,8 @@ import eu.kanade.domain.chapter.model.toDbChapter
 import eu.kanade.domain.manga.interactor.SetMangaViewerFlags
 import eu.kanade.domain.manga.model.orientationType
 import eu.kanade.domain.manga.model.readingModeType
-import eu.kanade.domain.track.model.toDbTrack
-import eu.kanade.domain.track.service.DelayedTrackingUpdateJob
+import eu.kanade.domain.track.interactor.TrackChapter
 import eu.kanade.domain.track.service.TrackPreferences
-import eu.kanade.domain.track.store.DelayedTrackingStore
 import eu.kanade.tachiyomi.data.database.models.toDomainChapter
 import eu.kanade.tachiyomi.data.download.DownloadManager
 import eu.kanade.tachiyomi.data.download.DownloadProvider
@@ -21,7 +19,6 @@ import eu.kanade.tachiyomi.data.download.model.Download
 import eu.kanade.tachiyomi.data.saver.Image
 import eu.kanade.tachiyomi.data.saver.ImageSaver
 import eu.kanade.tachiyomi.data.saver.Location
-import eu.kanade.tachiyomi.data.track.TrackManager
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.ui.reader.loader.ChapterLoader
@@ -42,11 +39,8 @@ import eu.kanade.tachiyomi.util.lang.byteSize
 import eu.kanade.tachiyomi.util.lang.takeBytes
 import eu.kanade.tachiyomi.util.storage.DiskUtil
 import eu.kanade.tachiyomi.util.storage.cacheImageDir
-import eu.kanade.tachiyomi.util.system.isOnline
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.async
-import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -75,8 +69,6 @@ import tachiyomi.domain.history.model.HistoryUpdate
 import tachiyomi.domain.manga.interactor.GetManga
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.domain.source.service.SourceManager
-import tachiyomi.domain.track.interactor.GetTracks
-import tachiyomi.domain.track.interactor.InsertTrack
 import tachiyomi.source.local.isLocal
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
@@ -96,12 +88,10 @@ class ReaderViewModel(
     private val basePreferences: BasePreferences = Injekt.get(),
     private val downloadPreferences: DownloadPreferences = Injekt.get(),
     private val trackPreferences: TrackPreferences = Injekt.get(),
-    private val delayedTrackingStore: DelayedTrackingStore = Injekt.get(),
+    private val trackChapter: TrackChapter = Injekt.get(),
     private val getManga: GetManga = Injekt.get(),
     private val getChapterByMangaId: GetChapterByMangaId = Injekt.get(),
     private val getNextChapters: GetNextChapters = Injekt.get(),
-    private val getTracks: GetTracks = Injekt.get(),
-    private val insertTrack: InsertTrack = Injekt.get(),
     private val upsertHistory: UpsertHistory = Injekt.get(),
     private val updateChapter: UpdateChapter = Injekt.get(),
     private val setMangaViewerFlags: SetMangaViewerFlags = Injekt.get(),
@@ -197,12 +187,6 @@ class ReaderViewModel(
             .map(::ReaderChapter)
     }
 
-    private var hasTrackers: Boolean = false
-    private val checkTrackers: (Manga) -> Unit = { manga ->
-        val tracks = runBlocking { getTracks.await(manga.id) }
-        hasTrackers = tracks.isNotEmpty()
-    }
-
     private val incognitoMode = preferences.incognitoMode().get()
     private val downloadAheadAmount = downloadPreferences.autoDownloadWhileReading().get()
 
@@ -258,8 +242,6 @@ class ReaderViewModel(
                     mutableState.update { it.copy(manga = manga) }
                     if (chapterId == -1L) chapterId = initialChapterId
 
-                    checkTrackers(manga)
-
                     val context = Injekt.get<Application>()
                     val source = sourceManager.getOrStub(manga.source)
                     loader = ChapterLoader(context, downloadManager, downloadProvider, manga, source)
@@ -419,7 +401,7 @@ class ReaderViewModel(
 
         // Save last page read and mark as read if needed
         viewModelScope.launchNonCancellable {
-            updateChapterProgress(page.index)
+            updateChapterProgress(selectedChapter, page.index)
         }
 
         if (selectedChapter != getCurrentChapter()) {
@@ -499,9 +481,7 @@ class ReaderViewModel(
      * Saves the chapter progress (last read page and whether it's read)
      * if incognito mode isn't on.
      */
-    private suspend fun updateChapterProgress(pageIndex: Int) {
-        val readerChapter = getCurrentChapter() ?: return
-
+    private suspend fun updateChapterProgress(readerChapter: ReaderChapter, pageIndex: Int) {
         mutableState.update {
             it.copy(currentPage = pageIndex + 1)
         }
@@ -532,18 +512,19 @@ class ReaderViewModel(
     }
 
     fun flushReadTimer() {
+        getCurrentChapter()?.let {
             viewModelScope.launchNonCancellable {
-            updateHistory()
+                updateHistory(it)
+            }
         }
     }
 
     /**
      * Saves the chapter last read history if incognito mode isn't on.
      */
-    private suspend fun updateHistory() {
+    private suspend fun updateHistory(readerChapter: ReaderChapter) {
         if (incognitoMode) return
 
-        val readerChapter = getCurrentChapter() ?: return
         val chapterId = readerChapter.chapter.id!!
         val endTime = Date()
         val sessionReadDuration = chapterReadStartTime?.let { endTime.time - it } ?: 0
@@ -829,44 +810,14 @@ class ReaderViewModel(
      * will run in a background thread and errors are ignored.
      */
     private fun updateTrackChapterRead(readerChapter: ReaderChapter) {
-        if (incognitoMode || !hasTrackers) return
+        if (incognitoMode) return
         if (!trackPreferences.autoUpdateTrack().get()) return
 
         val manga = manga ?: return
-        val chapterRead = readerChapter.chapter.chapter_number.toDouble()
-
-        val trackManager = Injekt.get<TrackManager>()
         val context = Injekt.get<Application>()
 
         viewModelScope.launchNonCancellable {
-            getTracks.await(manga.id)
-                .mapNotNull { track ->
-                    val service = trackManager.getService(track.syncId)
-                    if (service != null && service.isLogged && chapterRead > track.lastChapterRead) {
-                        val updatedTrack = track.copy(lastChapterRead = chapterRead)
-
-                        // We want these to execute even if the presenter is destroyed and leaks
-                        // for a while. The view can still be garbage collected.
-                        async {
-                            runCatching {
-                                try {
-                                    if (!context.isOnline()) error("Couldn't update tracker as device is offline")
-                                    service.update(updatedTrack.toDbTrack(), true)
-                                    insertTrack.await(updatedTrack)
-                                } catch (e: Exception) {
-                                    delayedTrackingStore.addItem(updatedTrack)
-                                    DelayedTrackingUpdateJob.setupTask(context)
-                                    throw e
-                                }
-                            }
-                        }
-                    } else {
-                        null
-                    }
-                }
-                .awaitAll()
-                .mapNotNull { it.exceptionOrNull() }
-                .forEach { logcat(LogPriority.INFO, it) }
+            trackChapter.await(context, manga.id, readerChapter.chapter.chapter_number.toDouble())
         }
     }