feat: basic database functionality

lib/data/dao/statistic_game_dao.dart

@@ -0,0 +1,60 @@
+import 'package:drift/drift.dart';
+import 'package:tallee/core/enums.dart';
+import 'package:tallee/data/db/database.dart';
+import 'package:tallee/data/db/tables/statistic_game_table.dart';
+import 'package:tallee/data/models/game.dart';
+
+part 'statistic_game_dao.g.dart';
+
+@DriftAccessor(tables: [StatisticGameTable])
+class StatisticGameDao extends DatabaseAccessor<AppDatabase>
+    with _$StatisticGameDaoMixin {
+  StatisticGameDao(super.db);
+
+  /// Retrieves a list of games associated with a specific statistic.
+  Future<List<Game>> getGamesForStatistic(String statisticId) async {
+    final query = select(statisticGameTable).join([
+      innerJoin(gameTable, gameTable.id.equalsExp(statisticGameTable.gameId)),
+    ])..where(statisticGameTable.statisticId.equals(statisticId));
+
+    final results = await query.map((row) => row.readTable(gameTable)).get();
+    return results
+        .map(
+          (result) => Game(
+            id: result.id,
+            name: result.name,
+            ruleset: Ruleset.values.firstWhere((e) => e.name == result.ruleset),
+            description: result.description,
+            color: GameColor.values.firstWhere((e) => e.name == result.color),
+            icon: result.icon,
+            createdAt: result.createdAt,
+          ),
+        )
+        .toList();
+  }
+
+  Future<bool> addStatisticGames({
+    required String statisticId,
+    required List<Game> games,
+  }) {
+    final entries = games
+        .map(
+          (game) => StatisticGameTableCompanion.insert(
+            statisticId: statisticId,
+            gameId: game.id,
+          ),
+        )
+        .toList();
+
+    return batch((batch) {
+      batch.insertAll(
+        statisticGameTable,
+        entries,
+        mode: InsertMode.insertOrReplace,
+      );
+    }).then((_) => true).catchError((error) {
+      print('Error adding statistic games: $error');
+      return false;
+    });
+  }
+}