Add advanced option to always update manga title from source (#1182)

Co-authored-by: AntsyLich <59261191+AntsyLich@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt

@@ -282,6 +282,41 @@ class DownloadCache(
         notifyChanges()
     }
 
+    /**
+     * Renames a manga in this cache.
+     *
+     * @param manga the manga being renamed.
+     * @param mangaUniFile the manga's new directory.
+     * @param newTitle the manga's new title.
+     */
+    suspend fun renameManga(manga: Manga, mangaUniFile: UniFile, newTitle: String) {
+        rootDownloadsDirMutex.withLock {
+            val sourceDir = rootDownloadsDir.sourceDirs[manga.source] ?: return
+            val oldMangaDirName = provider.getMangaDirName(manga.title)
+            var oldChapterDirs: MutableSet<String>? = null
+            // Save the old name's cached chapter dirs
+            if (sourceDir.mangaDirs.containsKey(oldMangaDirName)) {
+                oldChapterDirs = sourceDir.mangaDirs[oldMangaDirName]?.chapterDirs
+                sourceDir.mangaDirs -= oldMangaDirName
+            }
+
+            // Retrieve/create the cached manga directory for new name
+            val newMangaDirName = provider.getMangaDirName(newTitle)
+            var mangaDir = sourceDir.mangaDirs[newMangaDirName]
+            if (mangaDir == null) {
+                mangaDir = MangaDirectory(mangaUniFile)
+                sourceDir.mangaDirs += newMangaDirName to mangaDir
+            }
+
+            // Add the old chapters to new name's cache
+            if (!oldChapterDirs.isNullOrEmpty()) {
+                mangaDir.chapterDirs += oldChapterDirs
+            }
+        }
+
+        notifyChanges()
+    }
+
     suspend fun removeSource(source: Source) {
         rootDownloadsDirMutex.withLock {
             rootDownloadsDir.sourceDirs -= source.id

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt

@@ -327,6 +327,38 @@ class DownloadManager(
         }
     }
 
+    /**
+     * Renames manga download folder
+     *
+     * @param manga the manga
+     * @param newTitle the new manga title.
+     */
+    suspend fun renameManga(manga: Manga, newTitle: String) {
+        val source = sourceManager.getOrStub(manga.source)
+        val oldFolder = provider.findMangaDir(manga.title, source) ?: return
+        val newName = provider.getMangaDirName(newTitle)
+
+        if (oldFolder.name == newName) return
+
+        // just to be safe, don't allow downloads for this manga while renaming it
+        downloader.removeFromQueue(manga)
+
+        val capitalizationChanged = oldFolder.name.equals(newName, ignoreCase = true)
+        if (capitalizationChanged) {
+            val tempName = newName + Downloader.TMP_DIR_SUFFIX
+            if (!oldFolder.renameTo(tempName)) {
+                logcat(LogPriority.ERROR) { "Failed to rename manga download folder: ${oldFolder.name}" }
+                return
+            }
+        }
+
+        if (oldFolder.renameTo(newName)) {
+            cache.renameManga(manga, oldFolder, newTitle)
+        } else {
+            logcat(LogPriority.ERROR) { "Failed to rename manga download folder: ${oldFolder.name}" }
+        }
+    }
+
     /**
      * Renames an already downloaded chapter
      *