MORE CHANGES. Pieces can be moved now.

lib/chess_bloc/chess_bloc.dart

@@ -29,15 +29,10 @@ class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
   ) {
     Map<ChessCoordinate, ChessPiece> newPosition = {};
 
-    newPosition[ChessCoordinate(5, 5)] =
-        ChessPiece(ChessPieceName.blackBishop, ChessColor.black);
-
-    ChessPiece? piece =
-        state.position[ChessCoordinate.copyFrom(event.startSquare)];
-
-    newPosition[event.endSquare] = piece!;
+    newPosition[event.endSquare] = state.position[event.startSquare]!;
     newPosition[event.startSquare] = const ChessPiece.none();
 
+    print('emitting new state with position $newPosition');
     emit(ChessBoardState(
       state.flipped,
       ChessColor.black,
@@ -90,6 +85,10 @@ class ChessBoardState {
       for (int col = 1; col <= 8; col++) {
         position[ChessCoordinate(row, col)] =
             ChessPiece(ChessPieceName.none, ChessColor.white);
+        if (col == 1 && row == 4) {
+          position[ChessCoordinate(col, row)] =
+              ChessPiece(ChessPieceName.blackKing, ChessColor.black);
+        }
       }
     }
 

lib/chessapp/chess_board.dart

@@ -16,9 +16,12 @@ class ChessBoard extends StatelessWidget {
       var column = (i % 8) + 1;
       var row = (i ~/ 8) + 1;
 
+      final piece = bState.position[ChessCoordinate(column, row)];
+
       squares.add(
         ChessSquare(
           coordinate: ChessCoordinate(column, row),
+          containedPiece: piece,
         ),
       );
     }
@@ -28,18 +31,11 @@ class ChessBoard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    _placePieces();
-
     return Column(
       children: _buildBoard(bState.flipped),
     );
   }
 
-  void _placePieces() {
-    squares[0].containedPiece =
-        ChessPiece(ChessPieceName.blackBishop, ChessColor.black);
-  }
-
   Row _buildChessRow(int rowNo, bool flipped) {
     if (!flipped) {
       return Row(

lib/chessapp/chess_square.dart

@@ -57,10 +57,15 @@ class ChessSquare extends StatelessWidget {
       },
       onAccept: (move) {
         move.endSquare = coordinate;
-        ChessBloc().add(PieceMoved(
+
+        if (move.endSquare != move.startSquare) {
+          ChessBloc().add(
+            PieceMoved(
               startSquare: move.startSquare,
               endSquare: move.endSquare,
-        ));
+            ),
+          );
+        }
       },
     );
   }

lib/chessapp/chess_utils.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/svg.dart';
+import 'package:quiver/core.dart';
 
 enum ChessPieceName {
   none,
@@ -32,7 +33,7 @@ Map<ChessPieceName, String> chessPiecesAssets = {
   ChessPieceName.blackRook: 'assets/pieces/black/rook.svg',
   ChessPieceName.blackQueen: 'assets/pieces/black/queen.svg',
   ChessPieceName.blackKing: 'assets/pieces/black/king.svg',
-  ChessPieceName.none: '',
+  ChessPieceName.none: 'assets/empty.svg',
 };
 
 class ChessCoordinate {
@@ -40,6 +41,7 @@ class ChessCoordinate {
   late int row;
 
   ChessCoordinate(this.column, this.row);
+
   ChessCoordinate.copyFrom(ChessCoordinate original)
       : column = original.column,
         row = original.row;
@@ -57,6 +59,18 @@ class ChessCoordinate {
     colInt = col.codeUnitAt(0) - 96;
     return colInt;
   }
+
+  @override
+  operator ==(other) {
+    return other is ChessCoordinate &&
+        other.column == column &&
+        other.row == row;
+  }
+
+  @override
+  int get hashCode {
+    return hash2(column, row);
+  }
 }
 
 class ChessPiece extends StatelessWidget {

pubspec.lock

@@ -187,6 +187,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.4"
+  quiver:
+    dependency: "direct main"
+    description:
+      name: quiver
+      sha256: "93982981971e812c94d4a6fa3a57b89f9ec12b38b6380cd3c1370c3b01e4580e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.0"
   sky_engine:
     dependency: transitive
     description: flutter

pubspec.yaml

@@ -37,6 +37,7 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
   flutter_bloc: ^8.1.1
+  quiver: ^3.1.0
 
 dev_dependencies:
   flutter_test: