Add square numbers and bug fixes

JoshHeaps.Net/Controllers/ChessController.cs

@@ -165,7 +165,7 @@ public class ChessController(
         var expectedPlayerId = isWhiteMove ? gameState.WhitePlayerId : gameState.BlackPlayerId;
 
         if (moveDto.PlayerId != expectedPlayerId)
-            return Forbid("You are not the current player.");
+            return StatusCode(403, "You are not the current player.");
 
         // Make sure player owns the piece
         var piece = gameState.Pieces.FirstOrDefault(p => p.Id == moveDto.PieceId);
@@ -174,7 +174,7 @@ public class ChessController(
             return NotFound("Chess piece Id does not exist");
 
         if ((isWhiteMove && piece.Color != PieceColor.White) || (!isWhiteMove && piece?.Color != PieceColor.Black))
-            return Forbid("You cannot move this piece.");
+            return StatusCode(403, "You cannot move this piece.");
 
         var result = chessService.MakeMove(gameState, moveDto);
 

JoshHeaps.Net/Services/Implementations/ChessService.cs

@@ -110,7 +110,6 @@ public class ChessService : IChessService
         var piece = gameState.Pieces.FirstOrDefault(p => p.Id == pieceId);
 
         if (piece == null) return [];
-        if (piece.Color != gameState.CurrentPlayer) return [];
 
         var candidateMoves = GenerateCandidateMoves(gameState, piece);
         var legalMoves = new List<Position>();
@@ -529,8 +528,15 @@ public class ChessService : IChessService
             var ep = gs.EnPassantTarget.Value;
 
             if (ep.Row == forward1 && Math.Abs(ep.Col - startCol) == 1)
+            {
+                // Verify there's an enemy pawn to capture
+                int enemyPawnRow = piece.Color == PieceColor.White ? ep.Row + 1 : ep.Row - 1;
+                var enemyPawn = gs.Board[enemyPawnRow, ep.Col];
+
+                if (enemyPawn != null && enemyPawn.Type == PieceType.Pawn && enemyPawn.Color != piece.Color)
                     moves.Add(ep);
             }
+        }
 
         return moves;
     }

JoshHeaps.Net/wwwroot/css/chess/game.css

@@ -1,5 +1,10 @@
-#chessBoard {
+#boardContainer {
+    position: relative;
+    width: fit-content;
     margin: 2vw auto;
+}
+
+#chessBoard {
     width: 60vw;
     height: 60vw;
     display: grid;
@@ -159,3 +164,29 @@
     height: 50px;
     pointer-events: none; /* ensures img doesn't steal the click */
 }
+
+.chessSquare .coordinate-label {
+    position: absolute;
+    font-size: 1.2vw;
+    font-weight: bold;
+    pointer-events: none;
+    user-select: none;
+}
+
+.chessSquare.light .coordinate-label {
+    color: #656770;
+}
+
+.chessSquare.dark .coordinate-label {
+    color: #ccc;
+}
+
+.chessSquare .row-label {
+    top: 2px;
+    left: 4px;
+}
+
+.chessSquare .col-label {
+    bottom: 2px;
+    right: 4px;
+}

JoshHeaps.Net/wwwroot/js/ChessScripts/ChessAPI.js

@@ -27,9 +27,14 @@ const ChessAPI = {
             body: JSON.stringify(moveDto)
         });
 
+        if (!response.ok) {
+            let message = await response.text();
+            throw new Error(message || "Invalid move or not your turn.");
+        }
+
         const result = await response.json();
 
-        if (!response.ok || !result.success) {
+        if (!result.success) {
             throw new Error(result.message || "Invalid move or not your turn.");
         }
 

JoshHeaps.Net/wwwroot/js/ChessScripts/ChessBoard.js

@@ -1,6 +1,7 @@
 const ChessBoard = {
     renderPieces(pieces) {
         this.clearAllSquares();
+        this.renderCoordinateLabels();
         this.placePieces(pieces);
         this.setupSquareEventHandlers();
         this.highlightPreviousMove();
@@ -106,6 +107,39 @@ const ChessBoard = {
                 ChessAPI.handleMove(targetRow, targetCol);
             };
         }
+    },
+
+    renderCoordinateLabels() {
+        const files = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
+        const ranks = ['8', '7', '6', '5', '4', '3', '2', '1'];
+
+        // If player is black, reverse the coordinates
+        if (!GameState.currentPlayerIsWhite) {
+            files.reverse();
+            ranks.reverse();
+        }
+
+        for (let i = 0; i < 64; i++) {
+            const square = document.getElementById(`square-${i}`);
+            const row = Math.floor(i / 8);
+            const col = i % 8;
+
+            // Add rank label (1-8) on the leftmost column
+            if (col === 0) {
+                const rankLabel = document.createElement('span');
+                rankLabel.className = 'coordinate-label row-label';
+                rankLabel.textContent = ranks[row];
+                square.appendChild(rankLabel);
+            }
+
+            // Add file label (a-h) on the bottom row
+            if (row === 7) {
+                const fileLabel = document.createElement('span');
+                fileLabel.className = 'coordinate-label col-label';
+                fileLabel.textContent = files[col];
+                square.appendChild(fileLabel);
+            }
+        }
     }
 };