Fix: Setting & fetching winner

lib/data/dao/match_dao.dart

@@ -27,9 +27,9 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
         if (row.groupId != null) {
           group = await db.groupDao.getGroupById(groupId: row.groupId!);
         }
-        final players = await db.playerMatchDao.getPlayersOfMatch(
+        final players =
-          matchId: row.id,
+            await db.playerMatchDao.getPlayersOfMatch(matchId: row.id) ?? [];
-        ) ?? [];
+        final winner = await getWinner(matchId: row.id);
         return Match(
           id: row.id,
           name: row.name ?? '',
@@ -39,6 +39,7 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
           notes: row.notes ?? '',
           createdAt: row.createdAt,
           endedAt: row.endedAt,
+          winner: winner,
         );
       }),
     );
@@ -56,7 +57,10 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
       group = await db.groupDao.getGroupById(groupId: result.groupId!);
     }
 
-    final players = await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
+    final players =
+        await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
+
+    final winner = await getWinner(matchId: matchId);
 
     return Match(
       id: result.id,
@@ -67,6 +71,7 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
       notes: result.notes ?? '',
       createdAt: result.createdAt,
       endedAt: result.endedAt,
+      winner: winner,
     );
   }
 
@@ -94,6 +99,10 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
           playerId: p.id,
         );
       }
+
+      if (match.winner != null) {
+        await setWinner(matchId: match.id, winnerId: match.winner!.id);
+      }
     });
   }
 
@@ -315,15 +324,16 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
   }
 
   /// Updates the group of the match with the given [matchId].
+  /// Replaces the existing group association with the new group specified by [newGroupId].
   /// Pass null to remove the group association.
   /// Returns `true` if more than 0 rows were affected, otherwise `false`.
   Future<bool> updateMatchGroup({
     required String matchId,
-    required String? groupId,
+    required String? newGroupId,
   }) async {
     final query = update(matchTable)..where((g) => g.id.equals(matchId));
     final rowsAffected = await query.write(
-      MatchTableCompanion(groupId: Value(groupId)),
+      MatchTableCompanion(groupId: Value(newGroupId)),
     );
     return rowsAffected > 0;
   }
@@ -379,10 +389,12 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
 
       // Add the new players to the match
       await Future.wait(
-        newPlayers.map((player) => db.playerMatchDao.addPlayerToMatch(
+        newPlayers.map(
+          (player) => db.playerMatchDao.addPlayerToMatch(
             matchId: matchId,
             playerId: player.id,
-        )),
+          ),
+        ),
       );
     });
   }
@@ -394,7 +406,8 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
   /// Checks if a match has a winner.
   /// Returns true if any player in the match has their score set to 1.
   Future<bool> hasWinner({required String matchId}) async {
-    final players = await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
+    final players =
+        await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
 
     for (final player in players) {
       final score = await db.playerMatchDao.getPlayerScore(
@@ -411,7 +424,8 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
   /// Gets the winner of a match.
   /// Returns the player with score 1, or null if no winner is set.
   Future<Player?> getWinner({required String matchId}) async {
-    final players = await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
+    final players =
+        await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
 
     for (final player in players) {
       final score = await db.playerMatchDao.getPlayerScore(
@@ -433,7 +447,8 @@ class MatchDao extends DatabaseAccessor<AppDatabase> with _$MatchDaoMixin {
     required String winnerId,
   }) async {
     await db.transaction(() async {
-      final players = await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
+      final players =
+          await db.playerMatchDao.getPlayersOfMatch(matchId: matchId) ?? [];
 
       // Set all players' scores to 0
       for (final player in players) {