Feat: Ersetzt die Isar-Datenbank durch die drift-Datenbank

lib/Entities/drift_database.dart

@@ -0,0 +1,59 @@
+import 'package:drift/drift.dart';
+import 'package:drift_flutter/drift_flutter.dart';
+
+import 'time_frame_enum.dart';
+
+part 'drift_database.g.dart';
+
+class Accounts extends Table {
+  IntColumn get id => integer().autoIncrement()();
+
+  TextColumn get name => text().withDefault(const Constant(''))();
+}
+
+class Transactions extends Table {
+  IntColumn get id => integer().autoIncrement()();
+
+  TextColumn get name => text().withDefault(const Constant(''))();
+
+  DateTimeColumn get date => dateTime().nullable()();
+
+  RealColumn get amount => real().withDefault(const Constant(0.0))();
+
+  IntColumn get accountId => integer().references(Accounts, #id)();
+
+  IntColumn get recurringTransactionId =>
+      integer().nullable().references(RecurringTransactions, #id)();
+}
+
+class RecurringTransactions extends Table {
+  IntColumn get id => integer().autoIncrement()();
+
+  TextColumn get name => text().withDefault(const Constant(''))();
+
+  DateTimeColumn get startDate => dateTime().nullable()();
+
+  IntColumn get timeFrame => intEnum<TimeFrameEnum>()();
+
+  RealColumn get amount => real().withDefault(const Constant(0.0))();
+
+  IntColumn get accountId => integer().references(Accounts, #id)();
+}
+
+@DriftDatabase(tables: [Accounts, Transactions, RecurringTransactions])
+class AppDatabase extends _$AppDatabase {
+  AppDatabase() : super(_openConnection());
+
+  @override
+  int get schemaVersion => 1;
+
+  static QueryExecutor _openConnection() {
+    return driftDatabase(
+      name: 'dragon_ledger',
+      web: DriftWebOptions(
+        sqlite3Wasm: Uri.parse('sqlite3.wasm'),
+        driftWorker: Uri.parse('drift_worker.js'),
+      ),
+    );
+  }
+}