feat(meta): Implement manga tracking

lib/src/service/database.dart

@@ -1,7 +1,9 @@
 import 'package:anitrack/src/data/anime.dart';
+import 'package:anitrack/src/data/manga.dart';
 import 'package:sqflite/sqflite.dart';
 
 const animeTable = 'Anime';
+const mangaTable = 'Manga';
 
 Future<void> _createDatabase(Database db, int version) async {
   await db.execute(
@@ -15,6 +17,18 @@ Future<void> _createDatabase(Database db, int version) async {
       title TEXT NOT NULL
     )''',
   );
+  await db.execute(
+    '''
+    CREATE TABLE $mangaTable(
+      id TEXT NOT NULL PRIMARY KEY,
+      state INTEGER NOT NULL,
+      chaptersTotal INTEGER,
+      chaptersRead INTEGER NOT NULL,
+      volumesOwned INTEGER NOT NULL,
+      thumbnailUrl TEXT NOT NULL,
+      title TEXT NOT NULL
+    )''',
+  );
 }
 
 class DatabaseService {
@@ -36,6 +50,15 @@ class DatabaseService {
       .map((Map<String, dynamic> anime) => AnimeTrackingData.fromJson(anime))
       .toList();
   }
+
+  Future<List<MangaTrackingData>> loadMangas() async {
+    final mangas = await _db.query(mangaTable);
+
+    return mangas
+      .cast<Map<String, dynamic>>()
+      .map((Map<String, dynamic> manga) => MangaTrackingData.fromJson(manga))
+      .toList();
+  }
   
   Future<void> addAnime(AnimeTrackingData data) async {
     await _db.insert(
@@ -52,4 +75,20 @@ class DatabaseService {
       whereArgs: [data.id],
     );
   }
+
+  Future<void> addManga(MangaTrackingData data) async {
+    await _db.insert(
+      mangaTable,
+      data.toJson(),
+    );
+  }
+
+  Future<void> updateManga(MangaTrackingData data) async {
+    await _db.update(
+      mangaTable,
+      data.toJson(),
+      where: 'id = ?',
+      whereArgs: [data.id],
+    );
+  }
 }