Delayed Tracking Update related fix (#8642)

* Delayed Tracking Update related fix

* Lint

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

@@ -10,6 +10,15 @@ class GetTracks(
     private val trackRepository: TrackRepository,
 ) {
 
+    suspend fun awaitOne(id: Long): Track? {
+        return try {
+            trackRepository.getTrackById(id)
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, e)
+            null
+        }
+    }
+
     suspend fun await(mangaId: Long): List<Track> {
         return try {
             trackRepository.getTracksByMangaId(mangaId)

app/src/main/java/eu/kanade/domain/track/repository/TrackRepository.kt

@@ -5,6 +5,8 @@ import kotlinx.coroutines.flow.Flow
 
 interface TrackRepository {
 
+    suspend fun getTrackById(id: Long): Track?
+
     suspend fun getTracksByMangaId(mangaId: Long): List<Track>
 
     fun getTracksAsFlow(): Flow<List<Track>>

app/src/main/java/eu/kanade/domain/track/service/DelayedTrackingUpdateJob.kt

@@ -0,0 +1,78 @@
+package eu.kanade.domain.track.service
+
+import android.content.Context
+import androidx.work.BackoffPolicy
+import androidx.work.Constraints
+import androidx.work.CoroutineWorker
+import androidx.work.ExistingWorkPolicy
+import androidx.work.NetworkType
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import eu.kanade.domain.track.interactor.GetTracks
+import eu.kanade.domain.track.interactor.InsertTrack
+import eu.kanade.domain.track.model.toDbTrack
+import eu.kanade.domain.track.store.DelayedTrackingStore
+import eu.kanade.tachiyomi.data.track.TrackManager
+import eu.kanade.tachiyomi.util.lang.withIOContext
+import eu.kanade.tachiyomi.util.system.logcat
+import logcat.LogPriority
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.util.concurrent.TimeUnit
+
+class DelayedTrackingUpdateJob(context: Context, workerParams: WorkerParameters) :
+    CoroutineWorker(context, workerParams) {
+
+    override suspend fun doWork(): Result {
+        val getTracks = Injekt.get<GetTracks>()
+        val insertTrack = Injekt.get<InsertTrack>()
+
+        val trackManager = Injekt.get<TrackManager>()
+        val delayedTrackingStore = Injekt.get<DelayedTrackingStore>()
+
+        withIOContext {
+            val tracks = delayedTrackingStore.getItems().mapNotNull {
+                val track = getTracks.awaitOne(it.trackId)
+                if (track == null) {
+                    delayedTrackingStore.remove(it.trackId)
+                }
+                track
+            }
+
+            tracks.forEach { track ->
+                try {
+                    val service = trackManager.getService(track.syncId)
+                    if (service != null && service.isLogged) {
+                        service.update(track.toDbTrack(), true)
+                        insertTrack.await(track)
+                    }
+                    delayedTrackingStore.remove(track.id)
+                } catch (e: Exception) {
+                    logcat(LogPriority.ERROR, e)
+                }
+            }
+        }
+
+        return Result.success()
+    }
+
+    companion object {
+        private const val TAG = "DelayedTrackingUpdate"
+
+        fun setupTask(context: Context) {
+            val constraints = Constraints.Builder()
+                .setRequiredNetworkType(NetworkType.CONNECTED)
+                .build()
+
+            val request = OneTimeWorkRequestBuilder<DelayedTrackingUpdateJob>()
+                .setConstraints(constraints)
+                .setBackoffCriteria(BackoffPolicy.EXPONENTIAL, 20, TimeUnit.SECONDS)
+                .addTag(TAG)
+                .build()
+
+            WorkManager.getInstance(context)
+                .enqueueUniqueWork(TAG, ExistingWorkPolicy.REPLACE, request)
+        }
+    }
+}

app/src/main/java/eu/kanade/domain/track/store/DelayedTrackingStore.kt

@@ -0,0 +1,46 @@
+package eu.kanade.domain.track.store
+
+import android.content.Context
+import androidx.core.content.edit
+import eu.kanade.domain.track.model.Track
+import eu.kanade.tachiyomi.util.system.logcat
+import logcat.LogPriority
+
+class DelayedTrackingStore(context: Context) {
+
+    /**
+     * Preference file where queued tracking updates are stored.
+     */
+    private val preferences = context.getSharedPreferences("tracking_queue", Context.MODE_PRIVATE)
+
+    fun addItem(track: Track) {
+        val trackId = track.id.toString()
+        val lastChapterRead = preferences.getFloat(trackId, 0f)
+        if (track.lastChapterRead > lastChapterRead) {
+            logcat(LogPriority.DEBUG) { "Queuing track item: $trackId, last chapter read: ${track.lastChapterRead}" }
+            preferences.edit {
+                putFloat(trackId, track.lastChapterRead.toFloat())
+            }
+        }
+    }
+
+    fun remove(trackId: Long) {
+        preferences.edit {
+            remove(trackId.toString())
+        }
+    }
+
+    fun getItems(): List<DelayedTrackingItem> {
+        return preferences.all.mapNotNull {
+            DelayedTrackingItem(
+                trackId = it.key.toLong(),
+                lastChapterRead = it.value.toString().toFloat(),
+            )
+        }
+    }
+
+    data class DelayedTrackingItem(
+        val trackId: Long,
+        val lastChapterRead: Float,
+    )
+}