Refactor tracker

app/src/androidTest/kotlin/org/koitharu/kotatsu/tracker/domain/TrackerTest.kt

@@ -1,198 +0,0 @@
-package org.koitharu.kotatsu.tracker.domain
-
-import androidx.test.ext.junit.runners.AndroidJUnit4
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import junit.framework.TestCase.*
-import kotlinx.coroutines.test.runTest
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import org.junit.runner.RunWith
-import org.koitharu.kotatsu.SampleData
-import org.koitharu.kotatsu.core.parser.MangaDataRepository
-import org.koitharu.kotatsu.parsers.model.Manga
-import javax.inject.Inject
-
-@HiltAndroidTest
-@RunWith(AndroidJUnit4::class)
-class TrackerTest {
-
-	@get:Rule
-	var hiltRule = HiltAndroidRule(this)
-
-	@Inject
-	lateinit var repository: TrackingRepository
-
-	@Inject
-	lateinit var dataRepository: MangaDataRepository
-
-	@Inject
-	lateinit var tracker: Tracker
-
-	@Before
-	fun setUp() {
-		hiltRule.inject()
-	}
-
-	@Test
-	fun noUpdates() = runTest {
-		val manga = loadManga("full.json")
-		tracker.deleteTrack(manga.id)
-
-		tracker.checkUpdates(manga, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(manga.id))
-		tracker.checkUpdates(manga, commit = true).apply {
-			assertTrue(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(manga.id))
-	}
-
-	@Test
-	fun hasUpdates() = runTest {
-		val mangaFirst = loadManga("first_chapters.json")
-		val mangaFull = loadManga("full.json")
-		tracker.deleteTrack(mangaFirst.id)
-
-		tracker.checkUpdates(mangaFirst, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertTrue(isValid)
-			assertEquals(3, newChapters.size)
-		}
-		assertEquals(3, repository.getNewChaptersCount(mangaFirst.id))
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertTrue(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(3, repository.getNewChaptersCount(mangaFirst.id))
-	}
-
-	@Test
-	fun badIds() = runTest {
-		val mangaFirst = loadManga("first_chapters.json")
-		val mangaBad = loadManga("bad_ids.json")
-		tracker.deleteTrack(mangaFirst.id)
-
-		tracker.checkUpdates(mangaFirst, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-		tracker.checkUpdates(mangaBad, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-		tracker.checkUpdates(mangaFirst, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-	}
-
-	@Test
-	fun badIds2() = runTest {
-		val mangaFirst = loadManga("first_chapters.json")
-		val mangaBad = loadManga("bad_ids.json")
-		val mangaFull = loadManga("full.json")
-		tracker.deleteTrack(mangaFirst.id)
-
-		tracker.checkUpdates(mangaFirst, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertTrue(isValid)
-			assertEquals(3, newChapters.size)
-		}
-		assertEquals(3, repository.getNewChaptersCount(mangaFull.id))
-		tracker.checkUpdates(mangaBad, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-	}
-
-	@Test
-	fun fullReset() = runTest {
-		val mangaFull = loadManga("full.json")
-		val mangaFirst = loadManga("first_chapters.json")
-		val mangaEmpty = loadManga("empty.json")
-		tracker.deleteTrack(mangaFull.id)
-
-		assertEquals(0, repository.getNewChaptersCount(mangaFull.id))
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFull.id))
-		tracker.checkUpdates(mangaEmpty, commit = true).apply {
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFull.id))
-		tracker.checkUpdates(mangaFirst, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFull.id))
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertTrue(isValid)
-			assertEquals(3, newChapters.size)
-		}
-		assertEquals(3, repository.getNewChaptersCount(mangaFull.id))
-		tracker.checkUpdates(mangaEmpty, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFull.id))
-	}
-
-	@Test
-	fun syncWithHistory() = runTest {
-		val mangaFull = loadManga("full.json")
-		val mangaFirst = loadManga("first_chapters.json")
-		tracker.deleteTrack(mangaFull.id)
-
-		tracker.checkUpdates(mangaFirst, commit = true).apply {
-			assertFalse(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertTrue(isValid)
-			assertEquals(3, newChapters.size)
-		}
-		assertEquals(3, repository.getNewChaptersCount(mangaFirst.id))
-
-		var chapter = requireNotNull(mangaFull.chapters).run { get(lastIndex - 1) }
-		tracker.syncWithHistory(mangaFull, chapter.id)
-
-		assertEquals(1, repository.getNewChaptersCount(mangaFirst.id))
-
-		chapter = requireNotNull(mangaFull.chapters).run { get(lastIndex) }
-		tracker.syncWithHistory(mangaFull, chapter.id)
-
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-
-		tracker.checkUpdates(mangaFull, commit = true).apply {
-			assertTrue(isValid)
-			assert(newChapters.isEmpty())
-		}
-		assertEquals(0, repository.getNewChaptersCount(mangaFirst.id))
-	}
-
-	private suspend fun loadManga(name: String): Manga {
-		val manga = SampleData.loadAsset("manga/$name", Manga::class)
-		dataRepository.storeManga(manga)
-		return manga
-	}
-}

app/src/main/kotlin/org/koitharu/kotatsu/details/domain/DetailsLoadUseCase.kt

@@ -27,7 +27,7 @@ import org.koitharu.kotatsu.parsers.exception.NotFoundException
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.util.recoverNotNull
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
-import org.koitharu.kotatsu.tracker.domain.Tracker
+import org.koitharu.kotatsu.tracker.domain.CheckNewChaptersUseCase
 import javax.inject.Inject
 import javax.inject.Provider
 
@@ -37,7 +37,7 @@ class DetailsLoadUseCase @Inject constructor(
 	private val mangaRepositoryFactory: MangaRepository.Factory,
 	private val recoverUseCase: RecoverMangaUseCase,
 	private val imageGetter: Html.ImageGetter,
-	private val trackerProvider: Provider<Tracker>,
+	private val newChaptersUseCaseProvider: Provider<CheckNewChaptersUseCase>,
 ) {
 
 	operator fun invoke(intent: MangaIntent): Flow<MangaDetails> = channelFlow {
@@ -55,11 +55,32 @@ class DetailsLoadUseCase @Inject constructor(
 		try {
 			val details = getDetails(manga)
 			launch { updateTracker(details) }
-			send(MangaDetails(details, local?.peek(), details.description?.parseAsHtml(withImages = false)?.trim(), false))
-			send(MangaDetails(details, local?.await(), details.description?.parseAsHtml(withImages = true)?.trim(), true))
+			send(
+				MangaDetails(
+					details,
+					local?.peek(),
+					details.description?.parseAsHtml(withImages = false)?.trim(),
+					false,
+				),
+			)
+			send(
+				MangaDetails(
+					details,
+					local?.await(),
+					details.description?.parseAsHtml(withImages = true)?.trim(),
+					true,
+				),
+			)
 		} catch (e: IOException) {
 			local?.await()?.manga?.also { localManga ->
-				send(MangaDetails(localManga, null, localManga.description?.parseAsHtml(withImages = false)?.trim(), true))
+				send(
+					MangaDetails(
+						localManga,
+						null,
+						localManga.description?.parseAsHtml(withImages = false)?.trim(),
+						true,
+					),
+				)
 			} ?: close(e)
 		}
 	}
@@ -97,7 +118,7 @@ class DetailsLoadUseCase @Inject constructor(
 	}
 
 	private suspend fun updateTracker(details: Manga) = runCatchingCancellable {
-		trackerProvider.get().syncWithDetails(details)
+		newChaptersUseCaseProvider.get()(details)
 	}.onFailure { e ->
 		e.printStackTraceDebug()
 	}

app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryRepository.kt

@@ -1,7 +1,6 @@
 package org.koitharu.kotatsu.history.data
 
 import androidx.room.withTransaction
-import dagger.Lazy
 import dagger.Reusable
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.distinctUntilChanged
@@ -30,8 +29,9 @@ import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.scrobbling.common.domain.Scrobbler
 import org.koitharu.kotatsu.scrobbling.common.domain.tryScrobble
-import org.koitharu.kotatsu.tracker.domain.Tracker
+import org.koitharu.kotatsu.tracker.domain.CheckNewChaptersUseCase
 import javax.inject.Inject
+import javax.inject.Provider
 
 const val PROGRESS_NONE = -1f
 
@@ -41,7 +41,7 @@ class HistoryRepository @Inject constructor(
 	private val settings: AppSettings,
 	private val scrobblers: Set<@JvmSuppressWildcards Scrobbler>,
 	private val mangaRepository: MangaDataRepository,
-	private val trackerLazy: Lazy<Tracker>,
+	private val newChaptersUseCaseProvider: Provider<CheckNewChaptersUseCase>,
 ) {
 
 	suspend fun getList(offset: Int, limit: Int): List<Manga> {
@@ -123,7 +123,7 @@ class HistoryRepository @Inject constructor(
 					deletedAt = 0L,
 				),
 			)
-			trackerLazy.get().syncWithHistory(manga, chapterId)
+			newChaptersUseCaseProvider.get()(manga, chapterId)
 			scrobblers.forEach { it.tryScrobble(manga, chapterId) }
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/CheckNewChaptersUseCase.kt

@@ -1,72 +1,56 @@
 package org.koitharu.kotatsu.tracker.domain
 
-import androidx.annotation.VisibleForTesting
 import coil.request.CachePolicy
-import dagger.Reusable
 import org.koitharu.kotatsu.core.model.getPreferredBranch
+import org.koitharu.kotatsu.core.model.isLocal
+import org.koitharu.kotatsu.core.parser.CachingMangaRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
-import org.koitharu.kotatsu.core.parser.ParserMangaRepository
 import org.koitharu.kotatsu.core.util.MultiMutex
 import org.koitharu.kotatsu.core.util.ext.toInstantOrNull
 import org.koitharu.kotatsu.history.data.HistoryRepository
+import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.tracker.domain.model.MangaTracking
 import org.koitharu.kotatsu.tracker.domain.model.MangaUpdates
 import java.time.Instant
 import javax.inject.Inject
+import javax.inject.Singleton
 
-@Reusable
-class Tracker @Inject constructor(
+@Singleton
+class CheckNewChaptersUseCase @Inject constructor(
 	private val repository: TrackingRepository,
 	private val historyRepository: HistoryRepository,
 	private val mangaRepositoryFactory: MangaRepository.Factory,
+	private val localMangaRepository: LocalMangaRepository,
 ) {
 
-	private val mangaMutex = MultiMutex<Long>()
+	private val mutex = MultiMutex<Long>()
 
-	suspend fun getTracks(limit: Int): List<MangaTracking> {
+	suspend operator fun invoke(manga: Manga): MangaUpdates = mutex.withLock(manga.id) {
 		repository.updateTracks()
-		return repository.getTracks(offset = 0, limit = limit)
+		val tracking = repository.getTrackOrNull(manga) ?: return MangaUpdates.Failure(
+			manga = manga,
+			error = null,
+		)
+		invokeImpl(tracking)
 	}
 
-	suspend fun fetchUpdates(
-		track: MangaTracking,
-		commit: Boolean
-	): MangaUpdates = mangaMutex.withLock(track.manga.id) {
-		val updates = runCatchingCancellable {
-			val repo = mangaRepositoryFactory.create(track.manga.source)
-			require(repo is ParserMangaRepository) { "Repository ${repo.javaClass.simpleName} is not supported" }
-			val manga = repo.getDetails(track.manga, CachePolicy.WRITE_ONLY)
-			compare(track, manga, getBranch(manga))
-		}.getOrElse { error ->
-			MangaUpdates.Failure(
-				manga = track.manga,
-				error = error,
-			)
-		}
-		if (commit) {
-			repository.saveUpdates(updates)
-		}
-		updates
+	suspend operator fun invoke(track: MangaTracking): MangaUpdates = mutex.withLock(track.manga.id) {
+		invokeImpl(track)
 	}
 
-	suspend fun syncWithDetails(details: Manga) {
-		requireNotNull(details.chapters)
-		val track = repository.getTrackOrNull(details) ?: return
-		val updates = compare(track, details, getBranch(details))
-		repository.saveUpdates(updates)
-	}
-
-	suspend fun syncWithHistory(details: Manga, chapterId: Long) {
-		val chapters = requireNotNull(details.chapters)
-		val track = repository.getTrackOrNull(details) ?: return
-		val chapterIndex = chapters.indexOfFirst { x -> x.id == chapterId }
+	suspend operator fun invoke(manga: Manga, currentChapterId: Long) = mutex.withLock(manga.id) {
+		repository.updateTracks()
+		val details = getFullManga(manga)
+		val chapters = details.chapters ?: return@withLock
+		val track = repository.getTrackOrNull(manga) ?: return@withLock
+		val chapterIndex = chapters.indexOfFirst { x -> x.id == currentChapterId }
 		val lastNewChapterIndex = chapters.size - track.newChapters
 		val lastChapter = chapters.lastOrNull()
 		val tracking = MangaTracking(
 			manga = details,
-			lastChapterId = lastChapter?.id ?: NO_ID,
+			lastChapterId = lastChapter?.id ?: 0L,
 			lastCheck = Instant.now(),
 			lastChapterDate = lastChapter?.uploadDate?.toInstantOrNull() ?: track.lastChapterDate,
 			newChapters = when {
@@ -79,19 +63,16 @@ class Tracker @Inject constructor(
 		repository.mergeWith(tracking)
 	}
 
-	@VisibleForTesting
-	suspend fun checkUpdates(manga: Manga, commit: Boolean): MangaUpdates.Success {
-		val track = repository.getTrack(manga)
-		val updates = compare(track, manga, getBranch(manga))
-		if (commit) {
-			repository.saveUpdates(updates)
-		}
-		return updates
-	}
-
-	@VisibleForTesting
-	suspend fun deleteTrack(mangaId: Long) = mangaMutex.withLock(mangaId) {
-		repository.deleteTrack(mangaId)
+	private suspend fun invokeImpl(track: MangaTracking): MangaUpdates = runCatchingCancellable {
+		val details = getFullManga(track.manga)
+		compare(track, details, getBranch(details))
+	}.getOrElse { error ->
+		MangaUpdates.Failure(
+			manga = track.manga,
+			error = error,
+		)
+	}.also { updates ->
+		repository.saveUpdates(updates)
 	}
 
 	private suspend fun getBranch(manga: Manga): String? {
@@ -99,6 +80,26 @@ class Tracker @Inject constructor(
 		return manga.getPreferredBranch(history)
 	}
 
+	private suspend fun getFullManga(manga: Manga): Manga = when {
+		manga.isLocal -> fetchDetails(
+			requireNotNull(localMangaRepository.getRemoteManga(manga)) {
+				"Local manga is not supported"
+			},
+		)
+
+		manga.chapters.isNullOrEmpty() -> fetchDetails(manga)
+		else -> manga
+	}
+
+	private suspend fun fetchDetails(manga: Manga): Manga {
+		val repo = mangaRepositoryFactory.create(manga.source)
+		return if (repo is CachingMangaRepository) {
+			repo.getDetails(manga, CachePolicy.WRITE_ONLY)
+		} else {
+			repo.getDetails(manga)
+		}
+	}
+
 	/**
 	 * The main functionality of tracker: check new chapters in [manga] comparing to the [track]
 	 */
@@ -127,9 +128,4 @@ class Tracker @Inject constructor(
 			}
 		}
 	}
-
-	private companion object {
-
-		const val NO_ID = 0L
-	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/GetTracksUseCase.kt

@@ -0,0 +1,14 @@
+package org.koitharu.kotatsu.tracker.domain
+
+import org.koitharu.kotatsu.tracker.domain.model.MangaTracking
+import javax.inject.Inject
+
+class GetTracksUseCase @Inject constructor(
+	private val repository: TrackingRepository,
+) {
+
+	suspend operator fun invoke(limit: Int): List<MangaTracking> {
+		repository.updateTracks()
+		return repository.getTracks(offset = 0, limit = limit)
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/TrackingRepository.kt

@@ -85,7 +85,7 @@ class TrackingRepository @Inject constructor(
 		}
 	}
 
-	@VisibleForTesting
+	@Deprecated("")
 	suspend fun getTrack(manga: Manga): MangaTracking {
 		return getTrackOrNull(manga) ?: MangaTracking(
 			manga = manga,
@@ -217,7 +217,7 @@ class TrackingRepository @Inject constructor(
 		size - ids.size
 	}
 
-	private suspend fun getOrCreateTrack(mangaId: Long): TrackEntity {
+	suspend fun getOrCreateTrack(mangaId: Long): TrackEntity {
 		return db.getTracksDao().find(mangaId) ?: TrackEntity.create(mangaId)
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/model/MangaUpdates.kt

@@ -19,11 +19,8 @@ sealed interface MangaUpdates {
 
 		fun lastChapterDate(): Long {
 			val lastChapter = newChapters.lastOrNull()
-			return if (lastChapter == null) {
-				manga.chapters?.lastOrNull()?.uploadDate ?: 0L
-			} else {
-				lastChapter.uploadDate.ifZero { System.currentTimeMillis() }
-			}
+			return lastChapter?.uploadDate?.ifZero { System.currentTimeMillis() }
+				?: (manga.chapters?.lastOrNull()?.uploadDate ?: 0L)
 		}
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/tracker/work/TrackWorker.kt

@@ -55,7 +55,8 @@ import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.parsers.util.toIntUp
 import org.koitharu.kotatsu.settings.SettingsActivity
 import org.koitharu.kotatsu.settings.work.PeriodicWorkScheduler
-import org.koitharu.kotatsu.tracker.domain.Tracker
+import org.koitharu.kotatsu.tracker.domain.CheckNewChaptersUseCase
+import org.koitharu.kotatsu.tracker.domain.GetTracksUseCase
 import org.koitharu.kotatsu.tracker.domain.model.MangaTracking
 import org.koitharu.kotatsu.tracker.domain.model.MangaUpdates
 import org.koitharu.kotatsu.tracker.work.TrackerNotificationHelper.NotificationInfo
@@ -71,7 +72,8 @@ class TrackWorker @AssistedInject constructor(
 	@Assisted workerParams: WorkerParameters,
 	private val notificationHelper: TrackerNotificationHelper,
 	private val settings: AppSettings,
-	private val tracker: Tracker,
+	private val getTracksUseCase: GetTracksUseCase,
+	private val checkNewChaptersUseCase: CheckNewChaptersUseCase,
 	private val workManager: WorkManager,
 	@TrackerLogger private val logger: FileLogger,
 ) : CoroutineWorker(context, workerParams) {
@@ -101,7 +103,7 @@ class TrackWorker @AssistedInject constructor(
 		if (!settings.isTrackerEnabled) {
 			return Result.success()
 		}
-		val tracks = tracker.getTracks(if (isFullRun) Int.MAX_VALUE else BATCH_SIZE)
+		val tracks = getTracksUseCase(if (isFullRun) Int.MAX_VALUE else BATCH_SIZE)
 		logger.log("Total ${tracks.size} tracks")
 		if (tracks.isEmpty()) {
 			return Result.success()
@@ -127,7 +129,7 @@ class TrackWorker @AssistedInject constructor(
 					semaphore.withPermit {
 						send(
 							runCatchingCancellable {
-								tracker.fetchUpdates(track, commit = true)
+								checkNewChaptersUseCase.invoke(track)
 							}.getOrElse { error ->
 								MangaUpdates.Failure(
 									manga = track.manga,