Display last played move.

We now color the squares of the last move. This makes the state of the
board clearer and shows whose turn it is.

lib/chess/chess_board.dart

@@ -12,23 +12,30 @@ class ChessBoard extends StatelessWidget {
 
   const ChessBoard._({required this.bState, required this.squares});
 
-  factory ChessBoard({required ChessBoardState bState}) {
+  factory ChessBoard({required ChessBoardState boardState}) {
     List<ChessSquare> squares = List.empty(growable: true);
     for (int i = 0; i < 64; i++) {
       var column = (i % 8) + 1;
       var row = (i ~/ 8) + 1;
 
-      final piece = bState.position[ChessCoordinate(column, row)];
+      final piece = boardState.position[ChessCoordinate(column, row)];
+
+      bool squareWasPartOfLastMove = false;
+      if (boardState.lastMove.to == ChessCoordinate(column, row) ||
+          boardState.lastMove.from == ChessCoordinate(column, row)) {
+        squareWasPartOfLastMove = true;
+      }
 
       squares.add(
         ChessSquare(
           ChessCoordinate(column, row),
           piece,
+          squareWasPartOfLastMove,
         ),
       );
     }
 
-    return ChessBoard._(bState: bState, squares: squares);
+    return ChessBoard._(bState: boardState, squares: squares);
   }
 
   @override

lib/chess/chess_square.dart

@@ -15,28 +15,32 @@ class ChessSquare extends StatelessWidget {
 
   final Color color;
 
-  const ChessSquare._(
+  const ChessSquare._({
-      {required this.coordinate,
+    required this.coordinate,
     required this.containedPiece,
-      required this.color});
+    required this.color,
+  });
 
-  factory ChessSquare(ChessCoordinate coord, ChessPiece? piece) {
+  factory ChessSquare(
-    Color lightSquares = Colors.brown.shade50;
+      ChessCoordinate coord, ChessPiece? piece, bool wasPartOfLastMove) {
-    Color darkSquares = Colors.brown.shade400;
+    Color lightSquaresColor =
+        wasPartOfLastMove ? Colors.green.shade200 : Colors.brown.shade50;
+    Color darkSquaresColor =
+        wasPartOfLastMove ? Colors.green.shade300 : Colors.brown.shade400;
 
     Color squareColor;
 
     if (coord.row % 2 == 0) {
       if (coord.column % 2 == 0) {
-        squareColor = darkSquares;
+        squareColor = darkSquaresColor;
       } else {
-        squareColor = lightSquares;
+        squareColor = lightSquaresColor;
       }
     } else {
       if (coord.column % 2 == 0) {
-        squareColor = lightSquares;
+        squareColor = lightSquaresColor;
       } else {
-        squareColor = darkSquares;
+        squareColor = darkSquaresColor;
       }
     }
 

lib/chess_bloc/chess_bloc.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:developer';
 
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:mchess/api/websocket_message.dart';
@@ -6,7 +7,6 @@ import 'package:mchess/chess_bloc/chess_events.dart';
 import 'package:mchess/chess_bloc/chess_position.dart';
 import 'package:mchess/connection/ws_connection.dart';
 import 'package:mchess/utils/chess_utils.dart';
-import 'dart:developer';
 
 class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
   static final ChessBloc _instance = ChessBloc._internal();
@@ -37,26 +37,47 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
   void initBoard(InitBoard event, Emitter<ChessBoardState> emit) {
     turnColor = ChessColor.white;
     ChessPositionManager.getInstance().resetToStartingPosition();
-    emit(ChessBoardState(ChessColor.white, ChessColor.white,
+    emit(
-        ChessPositionManager.getInstance().currentPosition));
+      ChessBoardState(
+        ChessColor.white,
+        ChessColor.white,
+        ChessPositionManager.getInstance().currentPosition,
+        ChessMove.none(),
+      ),
+    );
   }
 
   void flipBoard(ColorDetermined event, Emitter<ChessBoardState> emit) {
     log("My Color is $myColor");
     myColor = event.myColor;
-    emit(ChessBoardState(event.myColor, state.newTurnColor, state.position));
+    emit(
+      ChessBoardState(
+        event.myColor,
+        state.newTurnColor,
+        state.position,
+        ChessMove.none(),
+      ),
+    );
   }
 
   void moveAndPositionHandler(
     ReceivedMove event,
     Emitter<ChessBoardState> emit,
   ) {
-    ChessPositionManager.getInstance().recordMove(event.startSquare, event.endSquare, event.position);
+    ChessPositionManager.getInstance()
+        .recordMove(event.startSquare, event.endSquare, event.position);
     turnColor = state.newTurnColor == ChessColor.white
         ? ChessColor.black
         : ChessColor.white;
 
-    emit(ChessBoardState(state.bottomColor, turnColor, event.position));
+    emit(
+      ChessBoardState(
+        state.bottomColor,
+        turnColor,
+        event.position,
+        ChessMove(from: event.startSquare, to: event.endSquare),
+      ),
+    );
   }
 
   void ownMoveHandler(OwnPieceMoved event, Emitter<ChessBoardState> emit) {
@@ -84,6 +105,7 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
         state.bottomColor,
         turnColor,
         tempPosition,
+        move
       ),
     );
   }
@@ -108,28 +130,28 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
   void invalidMoveHandler(
       InvalidMovePlayed event, Emitter<ChessBoardState> emit) {
     emit(
-      ChessBoardState(
+      ChessBoardState(state.bottomColor, turnColor,
-        state.bottomColor,
+          ChessPositionManager.getInstance().currentPosition, ChessMove.none()),
-        turnColor,
-        ChessPositionManager.getInstance().currentPosition,
-      ),
     );
   }
 }
 
 class ChessBoardState {
-  late ChessColor bottomColor;
+  final ChessColor bottomColor;
   final ChessColor newTurnColor;
   final ChessPosition position;
+  final ChessMove lastMove;
 
-  ChessBoardState._(this.bottomColor, this.newTurnColor, this.position);
+  ChessBoardState._(
+      this.bottomColor, this.newTurnColor, this.position, this.lastMove);
 
   factory ChessBoardState(
     ChessColor bottomColor,
     ChessColor turnColor,
-    Map<ChessCoordinate, ChessPiece> position,
+    ChessPosition position,
+    ChessMove lastMove,
   ) {
-    return ChessBoardState._(bottomColor, turnColor, position);
+    return ChessBoardState._(bottomColor, turnColor, position, lastMove);
   }
 
   factory ChessBoardState.init() {
@@ -139,7 +161,11 @@ class ChessBoardState {
     ChessPositionManager.getInstance().resetToStartingPosition();
 
     return ChessBoardState(
-        bottomColor, turnColor, ChessPositionManager.getInstance().currentPosition);
+      bottomColor,
+      turnColor,
+      ChessPositionManager.getInstance().currentPosition,
+      ChessMove.none(),
+    );
   }
 
   void logPosition(Map<ChessCoordinate, ChessPiece> pos) {

lib/pages/chess_game.dart

@@ -52,7 +52,7 @@ class _ChessGameState extends State<ChessGame> {
                   child: BlocBuilder<ChessBloc, ChessBoardState>(
                     builder: (context, state) {
                       return ChessBoard(
-                        bState: state,
+                        boardState: state,
                       );
                     },
                   ),

lib/utils/chess_utils.dart

@@ -4,7 +4,6 @@ import 'package:mchess/api/move.dart';
 import 'package:mchess/api/websocket_message.dart';
 import 'package:quiver/core.dart';
 
-
 Map<ChessPieceAssetKey, String> chessPiecesAssets = {
   ChessPieceAssetKey(
     pieceClass: ChessPieceClass.pawn,
@@ -241,6 +240,10 @@ class ChessMove {
     return ChessMove(from: start, to: end);
   }
 
+  factory ChessMove.none() {
+    return ChessMove(from: ChessCoordinate(0, 0), to: ChessCoordinate(0, 0));
+  }
+
   @override
   int get hashCode {
     return hash2(from, to);

pubspec.lock

@@ -53,10 +53,10 @@ packages:
     dependency: transitive
     description:
       name: collection
-      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
+      sha256: f092b211a4319e98e5ff58223576de6c2803db36221657b46c82574721240687
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.1"
+    version: "1.17.2"
   crypto:
     dependency: transitive
     description:
@@ -144,14 +144,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.6.7"
   lints:
     dependency: transitive
     description:
@@ -172,18 +164,18 @@ packages:
     dependency: transitive
     description:
       name: matcher
-      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.15"
+    version: "0.12.16"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      sha256: "9528f2f296073ff54cb9fee677df673ace1218163c3bc7628093e7eed5203d41"
       url: "https://pub.dev"
     source: hosted
-    version: "0.2.0"
+    version: "0.5.0"
   meta:
     dependency: transitive
     description:
@@ -249,10 +241,10 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
       url: "https://pub.dev"
     source: hosted
-    version: "1.9.1"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
@@ -289,10 +281,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
+      sha256: "75760ffd7786fffdfb9597c35c5b27eaeec82be8edfb6d71d32651128ed7aab8"
       url: "https://pub.dev"
     source: hosted
-    version: "0.5.1"
+    version: "0.6.0"
   typed_data:
     dependency: transitive
     description:
@@ -341,6 +333,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: dc8ccd225a2005c1be616fe02951e2e342092edf968cf0844220383757ef8f10
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.4-beta"
   web_socket_channel:
     dependency: "direct main"
     description:
@@ -358,5 +358,5 @@ packages:
     source: hosted
     version: "6.3.0"
 sdks:
-  dart: ">=3.0.0 <4.0.0"
+  dart: ">=3.1.0-185.0.dev <4.0.0"
   flutter: ">=3.7.0-0"