feat: basic database functionality

lib/data/dao/statistic_dao.dart

@@ -0,0 +1,112 @@
+import 'package:collection/collection.dart';
+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_table.dart';
+import 'package:tallee/data/models/statistic.dart';
+
+part 'statistic_dao.g.dart';
+
+@DriftAccessor(tables: [StatisticTable])
+class StatisticDao extends DatabaseAccessor<AppDatabase>
+    with _$StatisticDaoMixin {
+  StatisticDao(super.db);
+
+  /* Create */
+
+  Future<bool> addStatistic({required Statistic statistic}) async {
+    await into(statisticTable).insert(
+      StatisticTableCompanion.insert(
+        id: statistic.id,
+        type: statistic.type.name,
+        timeframe: Value(statistic.timeframe?.name),
+      ),
+      mode: InsertMode.insertOrReplace,
+    );
+
+    await db.statisticScopeDao.addStatisticScopes(
+      statisticId: statistic.id,
+      scopes: statistic.scopes,
+    );
+
+    if (statistic.selectedGroups != null) {
+      await db.statisticGroupDao.addStatisticGroups(
+        statisticId: statistic.id,
+        groups: statistic.selectedGroups!,
+      );
+    }
+
+    if (statistic.selectedGames != null) {
+      await db.statisticGameDao.addStatisticGames(
+        statisticId: statistic.id,
+        games: statistic.selectedGames!,
+      );
+    }
+
+    return true;
+  }
+
+  /* Read */
+
+  Future<Statistic?> getStatisticById(String statisticId) async {
+    final query = select(statisticTable);
+    final row = await query.getSingleOrNull();
+    if (row != null) {
+      final groups = await db.statisticGroupDao.getGroupsForStatistic(row.id);
+      final games = await db.statisticGameDao.getGamesForStatistic(row.id);
+      final scopes = await db.statisticScopeDao.getScopeForStatistic(row.id);
+
+      return Statistic(
+        type: StatisticType.values.firstWhere((type) => type.name == row.type),
+        scopes: scopes,
+        id: row.id,
+        timeframe: Timeframe.values.firstWhereOrNull(
+          (t) => t.name == row.timeframe,
+        ),
+        selectedGroups: groups,
+        selectedGames: games,
+      );
+    }
+    return null;
+  }
+
+  /// Retrieves all statistics from the database, including their associated groups and games.
+  Future<List<Statistic>> getAllStatistics() async {
+    final query = select(statisticTable);
+    final rows = await query.get();
+    return Future.wait(
+      rows.map((row) async {
+        final groups = await db.statisticGroupDao.getGroupsForStatistic(row.id);
+        final games = await db.statisticGameDao.getGamesForStatistic(row.id);
+
+        return Statistic(
+          type: StatisticType.values.firstWhere(
+            (type) => type.name == row.type,
+          ),
+          scopes: [],
+          id: row.id,
+          timeframe: Timeframe.values.firstWhereOrNull(
+            (t) => t.name == row.timeframe,
+          ),
+          selectedGroups: groups,
+          selectedGames: games,
+        );
+      }),
+    );
+  }
+
+  /* Delete */
+
+  Future<bool> deleteStatistic(String statisticId) async {
+    final rowsDeleted = await (delete(
+      statisticTable,
+    )..where((tbl) => tbl.id.equals(statisticId))).go();
+
+    return rowsDeleted > 0;
+  }
+
+  Future<bool> deleteAllStatistics() async {
+    final rowsDeleted = await delete(statisticTable).go();
+    return rowsDeleted > 0;
+  }
+}