Implemented basic structure

lib/data/dao/group_dao.dart

@@ -0,0 +1,42 @@
+import 'package:drift/drift.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/db/tables/group_table.dart';
+import 'package:game_tracker/data/dto/group.dart';
+
+part 'group_dao.g.dart';
+
+@DriftAccessor(tables: [GroupTable])
+class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
+  GroupDao(super.db);
+
+  Future<List<Group>> getAllGroups() async {
+    final query = select(groupTable);
+    final result = await query.get();
+    return result
+        .map((row) => Group(id: row.id, name: row.name, members: []))
+        .toList();
+  }
+
+  Future<Group> getGroupById(String id) async {
+    final query = select(groupTable)..where((g) => g.id.equals(id));
+    final result = await query.getSingle();
+
+    // todo: Get group members
+
+    return Group(id: result.id, name: result.name, members: []);
+  }
+
+  Future<void> addGroup(String id, String name) async {
+    await into(group).insert(GroupCompanion.insert(id: id, name: name));
+  }
+
+  Future<void> deleteGroup(String id) async {
+    await (delete(group)..where((g) => g.id.equals(id))).go();
+  }
+
+  Future<void> updateGroupname(String id, String newName) async {
+    await (update(group)..where((g) => g.id.equals(id))).write(
+      GroupCompanion(name: Value(newName)),
+    );
+  }
+}

lib/data/dao/group_dao.g.dart

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+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'group_dao.dart';
+
+// ignore_for_file: type=lint
+mixin _$GroupDaoMixin on DatabaseAccessor<AppDatabase> {
+  $GroupTableTable get groupTable => attachedDatabase.groupTable;
+}

lib/data/dao/player_dao.dart

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+import 'package:drift/drift.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/db/tables/player_table.dart';
+import 'package:game_tracker/data/dto/player.dart';
+
+part 'player_dao.g.dart';
+
+@DriftAccessor(tables: [PlayerTable])
+class PlayerDao extends DatabaseAccessor<AppDatabase> with _$PlayerDaoMixin {
+  PlayerDao(super.db);
+
+  Future<List<Player>> getAllUsers() async {
+    return await select(UserTable).get();
+  }
+
+  Future<UserData> getUserById(String id) async {
+    return await (select(user)..where((u) => u.id.equals(id))).getSingle();
+  }
+
+  Future<void> addUser(String id, String name) async {
+    await into(user).insert(UserCompanion.insert(id: id, name: name));
+  }
+
+  Future<void> deleteUser(String id) async {
+    await (delete(user)..where((u) => u.id.equals(id))).go();
+  }
+
+  Future<void> updateUsername(String id, String newName) async {
+    await (update(user)..where((u) => u.id.equals(id))).write(
+      UserCompanion(name: Value(newName)),
+    );
+  }
+}

lib/data/dao/player_dao.g.dart

@@ -0,0 +1,8 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'player_dao.dart';
+
+// ignore_for_file: type=lint
+mixin _$PlayerDaoMixin on DatabaseAccessor<AppDatabase> {
+  $PlayerTableTable get playerTable => attachedDatabase.playerTable;
+}

lib/data/dao/player_group_dao.dart

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+import 'package:drift/drift.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/db/tables/player_group_table.dart';
+
+part 'player_group_dao.g.dart';
+
+@DriftAccessor(tables: [PlayerGroupTable])
+class PlayerGroupDao extends DatabaseAccessor<AppDatabase>
+    with _$PlayerGroupDaoMixin {
+  PlayerGroupDao(super.db);
+
+  Future<List<UserGroupData>> getAllUsersAndGroups() async {
+    return await select(userGroup).get();
+  }
+
+  Future<List<UserGroupData>> getUsersGroups(String userId) async {
+    return await (select(
+      userGroup,
+    )..where((uG) => uG.userId.equals(userId))).get();
+  }
+
+  Future<List<UserGroupData>> getGroupsUsers(String groupId) async {
+    return await (select(
+      userGroup,
+    )..where((uG) => uG.groupId.equals(groupId))).get();
+  }
+
+  Future<void> addUserToGroup(String userId, String groupId) async {
+    await into(
+      userGroup,
+    ).insert(UserGroupCompanion.insert(userId: userId, groupId: groupId));
+  }
+
+  Future<void> removeUserFromGroup(String userId, String groupId) async {
+    await (delete(
+          userGroup,
+        )..where((uG) => uG.userId.equals(userId) & uG.groupId.equals(groupId)))
+        .go();
+  }
+}

lib/data/dao/player_group_dao.g.dart

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+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'player_group_dao.dart';
+
+// ignore_for_file: type=lint
+mixin _$PlayerGroupDaoMixin on DatabaseAccessor<AppDatabase> {
+  $PlayerGroupTableTable get playerGroupTable =>
+      attachedDatabase.playerGroupTable;
+}