Promotion

src/backend/Board.java

@@ -2,8 +2,10 @@ package backend;
 
 import java.util.ArrayList;
 
-public class Board {
+import java.util.Scanner;
 
+public class Board {
+	private final Scanner scanner = new Scanner(System.in);
     private int selectedX = -1;   // negative value means impossible x and y so unselected
     private int selectedY = -1;
 
@@ -208,8 +210,13 @@ public class Board {
                     		board[3][y].setY(y);
                     	}
                     }
+                    
                     board[x][y] = new Piece(x, y, pieceToMove.getType(), pieceToMove.isWhite());
                     board[selectedX][selectedY] = null;
+                    if (pieceToMove.getType() == PieceType.Pawn && (y == 0 || y == 7)) {
+                        PieceType promotionType = askPromotionChoice(pieceToMove.isWhite());
+                        board[x][y] = new Piece(x, y, promotionType, pieceToMove.isWhite());
+                    }
                     board[x][y].setMoved(true);
                     incrementTurn();
                     
@@ -331,7 +338,22 @@ public class Board {
         clearConsole();
         System.out.println(toString());
     }
+    private PieceType askPromotionChoice(boolean isWhite) {
+        System.out.println("Choose piece to promote to:");
+        System.out.println("Enter Q for Queen, R for Rook, B for Bishop, N for Knight");
 
+        while (true) {
+            String input = scanner.nextLine().trim().toUpperCase();
+            switch (input) {
+                case "Q": return PieceType.Queen;
+                case "R": return PieceType.Rook;
+                case "B": return PieceType.Bishop;
+                case "N": return PieceType.Knight;
+                default:
+                    System.out.println("Invalid choice. Please enter Q, R, B, or N.");
+            }
+        }
+    }
 
     /* additional functionality to implement later */
     public void undoLastMove() {

src/backend/Piece.java

@@ -195,4 +195,5 @@ public class Piece {
             ny += dy;
         }
     }
+	
 }