lib/api/register.dart

@@ -12,8 +12,8 @@ class PlayerInfo {
   });
 
   factory PlayerInfo.fromJson(Map<String, dynamic> json) {
-    final playerid = UuidValue(json['playerID']);
+    final playerid = UuidValue.fromString(json['playerID']);
-    final lobbyid = UuidValue(json['lobbyID']);
+    final lobbyid = UuidValue.fromString(json['lobbyID']);
     final passphrase = json['passphrase'];
 
     return PlayerInfo(

lib/api/websocket_message.dart

@@ -1,6 +1,7 @@
 import 'package:mchess/api/move.dart';
 
 enum MessageType {
+  boardState,
   move,
   invalidMove,
   colorDetermined;
@@ -20,7 +21,8 @@ enum ApiColor {
 class ApiWebsocketMessage {
   final MessageType type;
   final ApiMove? move;
-  final ApiColor? color;
+  final ApiColor? turnColor;
+  final ApiColor? playerColor;
   final String? reason;
   final String? position;
   final ApiCoordinate? squareInCheck;
@@ -28,7 +30,8 @@ class ApiWebsocketMessage {
   ApiWebsocketMessage({
     required this.type,
     required this.move,
-    required this.color,
+    required this.turnColor,
+    required this.playerColor,
     required this.reason,
     required this.position,
     required this.squareInCheck,
@@ -38,34 +41,46 @@ class ApiWebsocketMessage {
     final type = MessageType.fromJson(json['messageType']);
     ApiWebsocketMessage ret;
     switch (type) {
+      case MessageType.boardState:
+        ret = ApiWebsocketMessage(
+          type: type,
+          move: null,
+          turnColor: ApiColor.fromJson(json['turnColor']),
+          reason: null,
+          position: json['position'],
+          squareInCheck: null,
+          playerColor: ApiColor.fromJson(json['playerColor']),
+        );
       case MessageType.colorDetermined:
         ret = ApiWebsocketMessage(
           type: type,
           move: null,
-          color: ApiColor.fromJson(json['color']),
+          turnColor: null,
           reason: null,
           position: null,
           squareInCheck: null,
+          playerColor: ApiColor.fromJson(json['playerColor']),
         );
         break;
       case MessageType.move:
         ret = ApiWebsocketMessage(
             type: type,
             move: ApiMove.fromJson(json['move']),
-          color: null,
+            turnColor: null,
             reason: null,
             position: json['position'],
-          squareInCheck: json['squareInCheck']
+            squareInCheck: json['squareInCheck'],
-        );
+            playerColor: null);
         break;
       case MessageType.invalidMove:
         ret = ApiWebsocketMessage(
           type: type,
           move: ApiMove.fromJson(json['move']),
-          color: null,
+          turnColor: null,
           reason: json['reason'],
           position: null,
           squareInCheck: json['squareInCheck'],
+          playerColor: null,
         );
     }
     return ret;
@@ -74,6 +89,6 @@ class ApiWebsocketMessage {
   Map<String, dynamic> toJson() => {
         'messageType': type,
         'move': move,
-        'color': color,
+        'color': turnColor,
       };
 }

lib/chess/chess_square.dart

@@ -70,7 +70,8 @@ class _ChessSquareState extends State<ChessSquare> {
       listener: (context, state) {
         setState(() {
           squareColor = Colors.red;
-                    });},
+        });
+      },
       child: Container(
         color: widget.color,
         child: ChessSquareOuterDragTarget(

lib/chess_bloc/chess_bloc.dart

@@ -20,10 +20,11 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
   ChessBloc._internal() : super(ChessBoardState.init()) {
     on<InitBoard>(initBoard);
     on<ColorDetermined>(flipBoard);
-    on<ReceivedMove>(moveAndPositionHandler);
+    on<ReceivedBoardState>(moveAndPositionHandler);
     on<OwnPieceMoved>(ownMoveHandler);
     on<OwnPromotionPlayed>(ownPromotionHandler);
     on<InvalidMovePlayed>(invalidMoveHandler);
+    on<BoardStatusReceived>(boardStatusHandler);
   }
 
   factory ChessBloc.getInstance() {
@@ -65,21 +66,24 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
   }
 
   void moveAndPositionHandler(
-    ReceivedMove event,
+      ReceivedBoardState event, Emitter<ChessBoardState> emit) {
-    Emitter<ChessBoardState> emit,
-  ) {
-    ChessPositionManager.getInstance()
-        .recordMove(event.startSquare, event.endSquare, event.position);
     turnColor = state.newTurnColor == ChessColor.white
         ? ChessColor.black
         : ChessColor.white;
 
+    ChessMove? move;
+    if (event.startSquare != null && event.endSquare != null) {
+      move = ChessMove(from: event.startSquare!, to: event.endSquare!);
+      ChessPositionManager.getInstance()
+          .recordMove(event.startSquare, event.endSquare, event.position);
+    }
+
     emit(
       ChessBoardState(
         state.bottomColor,
         turnColor,
         event.position,
-        ChessMove(from: event.startSquare, to: event.endSquare),
+        move,
         true,
         event.squareInCheck,
       ),
@@ -93,10 +97,11 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
     var apiMessage = ApiWebsocketMessage(
       type: MessageType.move,
       move: apiMove,
-      color: null,
+      turnColor: null,
       reason: null,
       position: null,
       squareInCheck: null,
+      playerColor: null,
     );
 
     ServerConnection.getInstance().send(jsonEncode(apiMessage));
@@ -122,10 +127,11 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
     var message = ApiWebsocketMessage(
       type: MessageType.move,
       move: apiMove,
-      color: null,
+      turnColor: null,
       reason: null,
       position: null,
       squareInCheck: null,
+      playerColor: null,
     );
     log(jsonEncode(message));
     ServerConnection.getInstance().send(jsonEncode(message));
@@ -144,6 +150,20 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
       ),
     );
   }
+
+  void boardStatusHandler(
+      BoardStatusReceived event, Emitter<ChessBoardState> emit) {
+    emit(
+      ChessBoardState(
+        event.myColor,
+        event.whoseTurn,
+        event.pos,
+        ChessMove.none(),
+        false,
+        ChessCoordinate.none(),
+      ),
+    );
+  }
 }
 
 class ChessBoardState {
@@ -167,12 +187,12 @@ class ChessBoardState {
     ChessColor bottomColor,
     ChessColor turnColor,
     ChessPosition position,
-    ChessMove lastMove,
+    ChessMove? lastMove,
     bool positionAckd,
     ChessCoordinate squareInCheck,
   ) {
-    return ChessBoardState._(bottomColor, turnColor, position, lastMove,
+    return ChessBoardState._(bottomColor, turnColor, position,
-        positionAckd, squareInCheck);
+        lastMove ?? ChessMove.none(), positionAckd, squareInCheck);
   }
 
   factory ChessBoardState.init() {

lib/chess_bloc/chess_events.dart

@@ -3,13 +3,13 @@ import 'package:mchess/utils/chess_utils.dart';
 
 abstract class ChessEvent {}
 
-class ReceivedMove extends ChessEvent {
+class ReceivedBoardState extends ChessEvent {
-  final ChessCoordinate startSquare;
+  final ChessCoordinate? startSquare;
-  final ChessCoordinate endSquare;
+  final ChessCoordinate? endSquare;
   final ChessPosition position;
   final ChessCoordinate squareInCheck;
 
-  ReceivedMove({
+  ReceivedBoardState({
     required this.startSquare,
     required this.endSquare,
     required this.position,
@@ -54,3 +54,15 @@ class InvalidMovePlayed extends ChessEvent {
     required this.squareInCheck,
   });
 }
+
+class BoardStatusReceived extends ChessEvent {
+  final ChessPosition pos;
+  final ChessColor myColor;
+  final ChessColor whoseTurn;
+
+  BoardStatusReceived({
+    required this.pos,
+    required this.myColor,
+    required this.whoseTurn,
+  });
+}

lib/chess_bloc/chess_position.dart

@@ -71,10 +71,16 @@ class ChessPositionManager {
     log(logString);
   }
 
-  void recordMove(ChessCoordinate from, ChessCoordinate to, ChessPosition pos) {
+  void recordMove(
+      ChessCoordinate? from, ChessCoordinate? to, ChessPosition pos) {
     position = pos;
 
-    history.add(ChessMove(from: from, to: to));
+    history.add(
+      ChessMove(
+        from: from ?? ChessCoordinate.none(),
+        to: to ?? ChessCoordinate.none(),
+      ),
+    );
 
     logPosition(position);
     logHistory(history);

lib/connection/ws_connection.dart

@@ -12,9 +12,8 @@ import 'package:mchess/utils/chess_utils.dart';
 import 'package:web_socket_channel/web_socket_channel.dart';
 
 class ServerConnection {
-  late WebSocketChannel channel;
+  WebSocketChannel? channel;
   late bool wasConnected = false;
-  late int counter = 0;
   Stream broadcast = const Stream.empty();
 
   static final ServerConnection _instance = ServerConnection._internal();
@@ -32,18 +31,22 @@ class ServerConnection {
   }
 
   void send(String message) {
-    channel.sink.add(message);
+    if (channel == null) {
-    counter++;
+      log("Sending on channel without initializing");
+      return;
+    }
+    channel!.sink.add(message);
   }
 
   void connect(String playerID, lobbyID, String? passphrase) {
+    String url;
     if (kDebugMode) {
-      channel =
+      url = 'ws://localhost:8080/api/ws';
-          WebSocketChannel.connect(Uri.parse('ws://localhost:8080/api/ws'));
     } else {
-      channel = WebSocketChannel.connect(
+      url = 'wss://chess.sw-gross.de:9999/api/ws';
-          Uri.parse('wss://chess.sw-gross.de:9999/api/ws'));
     }
+    channel = WebSocketChannel.connect(Uri.parse(url));
+
     send(
       jsonEncode(
         WebsocketMessageIdentifyPlayer(
@@ -54,17 +57,26 @@ class ServerConnection {
       ),
     );
 
-    log(channel.closeCode.toString());
+    log(channel!.closeCode.toString());
-    broadcast = channel.stream.asBroadcastStream();
+    broadcast = channel!.stream.asBroadcastStream();
     broadcast.listen(handleIncomingData);
   }
 
+  void disconnectExistingConnection() {
+    if (channel == null) return;
+    channel!.sink.close();
+  }
+
   void handleIncomingData(dynamic data) {
     log("Data received:");
     log(data);
     var apiMessage = ApiWebsocketMessage.fromJson(jsonDecode(data));
 
     switch (apiMessage.type) {
+      case MessageType.boardState:
+        handleBoardStateMessage(apiMessage);
+        break;
+
       case MessageType.colorDetermined:
         handleIncomingColorDeterminedMessage(apiMessage);
         break;
@@ -78,25 +90,46 @@ class ServerConnection {
     }
   }
 
-  void handleIncomingColorDeterminedMessage(ApiWebsocketMessage apiMessage) {
+  void handleBoardStateMessage(ApiWebsocketMessage apiMessage) {
-    ConnectionCubit.getInstance().opponentConnected();
+    ChessMove? move;
-    ChessBloc.getInstance().add(InitBoard());
+    if (apiMessage.move != null) {
-    ChessBloc.getInstance().add(
+      move = ChessMove.fromApiMove(apiMessage.move!);
-        ColorDetermined(myColor: ChessColor.fromApiColor(apiMessage.color!)));
     }
 
-  void handleIncomingMoveMessage(ApiWebsocketMessage apiMessage) {
-    var move = ChessMove.fromApiMove(apiMessage.move!);
-
     if (apiMessage.position != null) {
       ChessBloc.getInstance().add(
-        ReceivedMove(
+        ReceivedBoardState(
+          startSquare: move?.from,
+          endSquare: move?.to,
+          position: ChessPositionManager.getInstance()
+              .fromPGNString(apiMessage.position!),
+          squareInCheck: ChessCoordinate.fromApiCoordinate(
+              apiMessage.squareInCheck ?? const ApiCoordinate(col: 0, row: 0)),
+        ),
+      );
+    } else {
+      log('Error: no position received');
+    }
+  }
+
+  void handleIncomingColorDeterminedMessage(ApiWebsocketMessage apiMessage) {
+    ConnectionCubit.getInstance().opponentConnected();
+    ChessBloc.getInstance().add(InitBoard());
+    ChessBloc.getInstance().add(ColorDetermined(
+        myColor: ChessColor.fromApiColor(apiMessage.playerColor!)));
+  }
+
+  void handleIncomingMoveMessage(ApiWebsocketMessage apiMessage) {
+    if (apiMessage.position != null) {
+      var move = ChessMove.fromApiMove(apiMessage.move!);
+      ChessBloc.getInstance().add(
+        ReceivedBoardState(
           startSquare: move.from,
           endSquare: move.to,
           position: ChessPositionManager.getInstance()
               .fromPGNString(apiMessage.position!),
-          squareInCheck:
+          squareInCheck: ChessCoordinate.fromApiCoordinate(
-              ChessCoordinate.fromApiCoordinate(apiMessage.squareInCheck ?? const ApiCoordinate(col: 0, row: 0)),
+              apiMessage.squareInCheck ?? const ApiCoordinate(col: 0, row: 0)),
         ),
       );
     } else {
@@ -109,8 +142,8 @@ class ServerConnection {
     ChessBloc.getInstance().add(
       InvalidMovePlayed(
         move: ChessMove.fromApiMove(apiMessage.move!),
-        squareInCheck:
+        squareInCheck: ChessCoordinate.fromApiCoordinate(
-            ChessCoordinate.fromApiCoordinate(apiMessage.squareInCheck!),
+            apiMessage.squareInCheck ?? const ApiCoordinate(col: 0, row: 0)),
       ),
     );
   }

lib/pages/chess_game.dart

@@ -5,6 +5,7 @@ import 'package:mchess/chess_bloc/chess_bloc.dart';
 
 import 'package:mchess/chess/chess_board.dart';
 import 'package:mchess/chess_bloc/promotion_bloc.dart';
+import 'package:mchess/connection/ws_connection.dart';
 import 'package:mchess/utils/chess_utils.dart';
 import 'package:mchess/utils/widgets/promotion_dialog.dart';
 import 'package:uuid/uuid.dart';
@@ -53,6 +54,7 @@ class _ChessGameState extends State<ChessGame> {
       ),
       floatingActionButton: FloatingActionButton(
         onPressed: () {
+          ServerConnection.getInstance().disconnectExistingConnection();
           context.push('/');
         },
         child: const Icon(Icons.cancel),

lib/utils/chess_router.dart

@@ -19,7 +19,9 @@ class ChessAppRouter {
       GoRoute(
         path: '/',
         name: 'lobbySelector',
-        builder: (context, state) => const LobbySelector(),
+        builder: (context, state) {
+          return const LobbySelector();
+        },
       ),
       GoRoute(
           path: '/prepareRandom',

lib/utils/widgets/move_history_widget.dart

@@ -1,53 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:mchess/chess_bloc/chess_bloc.dart';
-import 'package:mchess/chess_bloc/chess_position.dart';
-import 'package:mchess/utils/chess_utils.dart';
-
-class MoveHistory extends StatefulWidget {
-  const MoveHistory({super.key});
-
-  @override
-  State<MoveHistory> createState() => _MoveHistoryState();
-}
-
-class _MoveHistoryState extends State<MoveHistory> {
-  late List<String> entries;
-
-  @override
-  void initState() {
-    entries = [];
-    super.initState();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return BlocListener<ChessBloc, ChessBoardState>(
-      listener: (context, state) {
-        List<String> newEntries = [];
-        var positionManager = ChessPositionManager.getInstance();
-        var allMoves = positionManager.allMoves;
-
-        for (ChessMove move in allMoves) {
-          var movedPiece = positionManager.getPieceAt(move.to);
-          var char = pieceCharacter[ChessPieceAssetKey(
-              pieceClass: movedPiece!.pieceClass,
-              color: movedPiece.color.getOpposite())];
-
-          if (movedPiece.color == ChessColor.white) {
-            newEntries.add("$char ${move.to.toAlphabetical()}");
-          } else {
-            newEntries.last =
-                "${newEntries.last}\t\t$char${move.to.toAlphabetical()}";
-          }
-        }
-        setState(() {
-          entries = newEntries;
-        });
-      },
-      child: ListView(children: [
-        for (var entry in entries) Text(entry),
-      ]),
-    );
-  }
-}

pubspec.lock

@@ -124,18 +124,18 @@ packages:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: c247a4f76071c3b97bb5ae8912968870d5565644801c5e09f3bc961b4d874895
+      sha256: c5fa45fa502ee880839e3b2152d987c44abae26d064a2376d4aad434cf0f7b15
       url: "https://pub.dev"
     source: hosted
-    version: "12.1.1"
+    version: "12.1.3"
   http:
     dependency: "direct main"
     description:
       name: http
-      sha256: "759d1a329847dd0f39226c688d3e06a6b8679668e350e2891a6474f8b4bb8525"
+      sha256: d4872660c46d929f6b8a9ef4e7a7eff7e49bbf0c4ec3f385ee32df5119175139
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.2"
   http_parser:
     dependency: transitive
     description:
@@ -212,10 +212,10 @@ packages:
     dependency: transitive
     description:
       name: petitparser
-      sha256: eeb2d1428ee7f4170e2bd498827296a18d4e7fc462b71727d111c0ac7707cfa6
+      sha256: c15605cd28af66339f8eb6fbe0e541bfe2d1b72d5825efc6598f3e0a31b9ad27
       url: "https://pub.dev"
     source: hosted
-    version: "6.0.1"
+    version: "6.0.2"
   provider:
     dependency: transitive
     description:
@@ -361,10 +361,10 @@ packages:
     dependency: transitive
     description:
       name: xml
-      sha256: af5e77e9b83f2f4adc5d3f0a4ece1c7f45a2467b695c2540381bac793e34e556
+      sha256: b015a8ad1c488f66851d762d3090a21c600e479dc75e68328c52774040cf9226
       url: "https://pub.dev"
     source: hosted
-    version: "6.4.2"
+    version: "6.5.0"
 sdks:
-  dart: ">=3.2.0-194.0.dev <4.0.0"
+  dart: ">=3.2.0 <4.0.0"
-  flutter: ">=3.7.0"
+  flutter: ">=3.10.0"

test/widget_test.dart

@@ -13,9 +13,9 @@ import 'package:uuid/uuid.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(const ChessGame(
+    await tester.pumpWidget(ChessGame(
-      playerID: UuidValue("test"),
+      playerID: UuidValue.fromString("test"),
-      lobbyID: UuidValue("testLobbyId"),
+      lobbyID: UuidValue.fromString("testLobbyId"),
       passphrase: 'test',
     ));