Use pagination for bookmarks backup

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/BookmarksDao.kt

@@ -17,9 +17,9 @@ abstract class BookmarksDao {
 
 	@Transaction
 	@Query(
-		"SELECT * FROM manga JOIN bookmarks ON bookmarks.manga_id = manga.manga_id ORDER BY percent",
+		"SELECT * FROM manga JOIN bookmarks ON bookmarks.manga_id = manga.manga_id ORDER BY percent LIMIT :limit OFFSET :offset",
 	)
-	abstract suspend fun findAll(): Map<MangaWithTags, List<BookmarkEntity>>
+	abstract suspend fun findAll(offset: Int, limit: Int): Map<MangaWithTags, List<BookmarkEntity>>
 
 	@Query("SELECT * FROM bookmarks WHERE manga_id = :mangaId AND chapter_id = :chapterId AND page = :page ORDER BY percent")
 	abstract fun observe(mangaId: Long, chapterId: Long, page: Int): Flow<BookmarkEntity?>

app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupRepository.kt

@@ -28,7 +28,7 @@ class BackupRepository @Inject constructor(
 		var offset = 0
 		val entry = BackupEntry(BackupEntry.Name.HISTORY, JSONArray())
 		while (true) {
-			val history = db.getHistoryDao().findAll(offset, PAGE_SIZE)
+			val history = db.getHistoryDao().findAll(offset = offset, limit = PAGE_SIZE)
 			if (history.isEmpty()) {
 				break
 			}
@@ -59,7 +59,7 @@ class BackupRepository @Inject constructor(
 		var offset = 0
 		val entry = BackupEntry(BackupEntry.Name.FAVOURITES, JSONArray())
 		while (true) {
-			val favourites = db.getFavouritesDao().findAllRaw(offset, PAGE_SIZE)
+			val favourites = db.getFavouritesDao().findAllRaw(offset = offset, limit = PAGE_SIZE)
 			if (favourites.isEmpty()) {
 				break
 			}
@@ -78,9 +78,15 @@ class BackupRepository @Inject constructor(
 	}
 
 	suspend fun dumpBookmarks(): BackupEntry {
+		var offset = 0
 		val entry = BackupEntry(BackupEntry.Name.BOOKMARKS, JSONArray())
-		val all = db.getBookmarksDao().findAll()
+		while (true) {
-		for ((m, b) in all) {
+			val bookmarks = db.getBookmarksDao().findAll(offset = offset, limit = PAGE_SIZE)
+			if (bookmarks.isEmpty()) {
+				break
+			}
+			offset += bookmarks.size
+			for ((m, b) in bookmarks) {
 				val json = JSONObject()
 				val manga = JsonSerializer(m.manga).toJson()
 				json.put("manga", manga)
@@ -92,6 +98,7 @@ class BackupRepository @Inject constructor(
 				json.put("bookmarks", bookmarks)
 				entry.data.put(json)
 			}
+		}
 		return entry
 	}