Optimize finding saved manga for remote one

app/src/main/kotlin/org/koitharu/kotatsu/core/util/CompositeMutex.kt

@@ -8,6 +8,7 @@ import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlin.coroutines.coroutineContext
 
+@Deprecated("", replaceWith = ReplaceWith("CompositeMutex2"))
 class CompositeMutex<T : Any> : Set<T> {
 
 	private val state = ArrayMap<T, MutableStateFlow<Boolean>>()

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/adapter/ChapterListItemAD.kt

@@ -7,6 +7,7 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.list.AdapterDelegateClickListenerAdapter
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.util.ext.drawableEnd
+import org.koitharu.kotatsu.core.util.ext.drawableStart
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ItemChapterBinding
@@ -47,7 +48,7 @@ fun chapterListItemAD(
 		}
 		binding.imageViewBookmarked.isVisible = item.isBookmarked
 		binding.imageViewDownloaded.isVisible = item.isDownloaded
-		binding.textViewTitle.drawableEnd = if (item.isNew) {
+		binding.textViewTitle.drawableStart = if (item.isNew) {
 			ContextCompat.getDrawable(context, R.drawable.ic_new)
 		} else {
 			null

app/src/main/kotlin/org/koitharu/kotatsu/local/data/LocalMangaRepository.kt

@@ -129,7 +129,11 @@ class LocalMangaRepository @Inject constructor(
 	}
 
 	suspend fun findSavedManga(remoteManga: Manga): LocalManga? {
-		// TODO fast path by name
+		// fast path
+		LocalMangaInput.find(storageManager.getReadableDirs(), remoteManga)?.let {
+			return it.getManga()
+		}
+		// slow path
 		val files = getAllFiles()
 		return channelFlow {
 			for (file in files) {

app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaInput.kt

@@ -2,12 +2,18 @@ package org.koitharu.kotatsu.local.data.input
 
 import android.net.Uri
 import androidx.core.net.toFile
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.flow.firstOrNull
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.launch
 import org.koitharu.kotatsu.local.data.CbzFilter
 import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaPage
 import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.toFileNameSafe
 import java.io.File
 
 sealed class LocalMangaInput(
@@ -37,6 +43,24 @@ sealed class LocalMangaInput(
 			else -> null
 		}
 
+		suspend fun find(roots: Iterable<File>, manga: Manga): LocalMangaInput? = channelFlow {
+			val fileName = manga.title.toFileNameSafe()
+			for (root in roots) {
+				launch {
+					val dir = File(root, fileName)
+					val zip = File(root, "$fileName.cbz")
+					val input = when {
+						dir.isDirectory -> LocalMangaDirInput(dir)
+						zip.isFile -> LocalMangaZipInput(zip)
+						else -> null
+					}
+					if (input?.getMangaInfo()?.id == manga.id) {
+						send(input)
+					}
+				}
+			}
+		}.flowOn(Dispatchers.Default).firstOrNull()
+
 		@JvmStatic
 		protected fun zipUri(file: File, entryName: String): String =
 			Uri.fromParts("cbz", file.path, entryName).toString()