Part 1

src/backend/Board.java

@@ -7,13 +7,28 @@ public class Board {
 	//Board dimensions
 	private int width;
 	private int height;
-
+	private ArrayList<Piece> pieces = new ArrayList<>();
+	private int turnNumber = 0;
+	private boolean isTurnWhite = true;
+	private int selectedX = -1;
+	private int selectedY = -1;
+	private Piece getPieceAt(int x, int y) {
+	    for (Piece piece : pieces) {
+	        if (piece.getX() == x && piece.getY() == y) {
+	            return piece;
+	        }
+	    }
+	    return null;
+	}
+	
 	public Board(int colNum, int lineNum) {
 		this.width = colNum;
 		this.height = lineNum;
-		//TODO
+	    this.turnNumber = 0;
+	    this.isTurnWhite = true;
 	}
 
+
 	public int getWidth() {
 		//TODO
 		return width;
@@ -25,47 +40,160 @@ public class Board {
 	}
 
 	public int getTurnNumber() {
+		return turnNumber;
 		//TODO
-		return 0;
 	}
 
 	public boolean isTurnWhite() {
+		return isTurnWhite;
 		//TODO
-		return false;
 	}
 
 	public void setPiece(boolean isWhite, PieceType type, int x, int y) {
+		if (x < 0 || x >= width || y < 0 || y >= height) {
+	        return;
+	    }
+	    
+	    for (int i = 0; i < pieces.size(); i++) {
+	        Piece piece = pieces.get(i);
+	        if (piece.getX() == x && piece.getY() == y) {
+	            pieces.remove(i);
+	            break;
+	        }
+	    }
+	    
+	    pieces.add(new Piece(x, y, type, isWhite));
 		//TODO
 	}
 
 	public void populateBoard() {
+		cleanBoard();
+
+	    for (int x = 0; x < getWidth(); x++) {
+	        setPiece(true, PieceType.Pawn, x, 6);
+	        setPiece(false, PieceType.Pawn, x, 1);
+	    }
+
+	    setPiece(true, PieceType.Rook, 0, 7);
+	    setPiece(true, PieceType.Rook, 7, 7);
+	    setPiece(false, PieceType.Rook, 0, 0);
+	    setPiece(false, PieceType.Rook, 7, 0);
+
+	    setPiece(true, PieceType.Knight, 1, 7);
+	    setPiece(true, PieceType.Knight, 6, 7);
+	    setPiece(false, PieceType.Knight, 1, 0);
+	    setPiece(false, PieceType.Knight, 6, 0);
+
+	    setPiece(true, PieceType.Bishop, 2, 7);
+	    setPiece(true, PieceType.Bishop, 5, 7);
+	    setPiece(false, PieceType.Bishop, 2, 0);
+	    setPiece(false, PieceType.Bishop, 5, 0);
+
+	    setPiece(true, PieceType.Queen, 3, 7);
+	    setPiece(false, PieceType.Queen, 3, 0);
+
+	    setPiece(true, PieceType.King, 4, 7);
+	    setPiece(false, PieceType.King, 4, 0);
 		//TODO
 	}
 	
 	public void cleanBoard() {
+		pieces.clear();
 		//TODO
 	}
 	
 	public String toString() {
+		 StringBuilder result = new StringBuilder();
+		    char[][] board = new char[height][width];
+		    for (int y = 0; y < height; y++) {
+		        for (int x = 0; x < width; x++) {
+		            board[y][x] = '.';
+		        }
+		    }
+		    
+		    for (Piece piece : pieces) {
+		        char symbol;
+		        switch (piece.getType()) {
+		            case Pawn: symbol = 'P'; break;
+		            case Rook: symbol = 'R'; break;
+		            case Knight: symbol = 'N'; break;
+		            case Bishop: symbol = 'B'; break;
+		            case Queen: symbol = 'Q'; break;
+		            case King: symbol = 'K'; break;
+		            default: symbol = '?';
+		        }
+
+		        if (!piece.isWhite()) {
+		            symbol = Character.toLowerCase(symbol);
+		        }
+		        
+		        board[piece.getY()][piece.getX()] = symbol;
+		    }
+
+		    for (int y = 0; y < height; y++) {
+		        result.append(8 - y).append(" ");
+		        for (int x = 0; x < width; x++) {
+		            result.append(board[y][x]).append(" ");
+		        }
+		        result.append("\n");
+		    }
+
+		    result.append("  ");
+		    for (int x = 0; x < width; x++) {
+		        result.append((char)('a' + x)).append(" ");
+		    }
+		    
+		    return result.toString();
 		//TODO
-		return "";
 	}
 	
 	public ArrayList<Piece> getPieces() {
-		ArrayList<Piece> pieces = new ArrayList<>();
-		//TODO
-		
-		return pieces;
+		return new ArrayList<>(pieces);
 	}
 
 	public void userTouch(int x, int y) {
-		//TODO
-		
+		if (x < 0 || x >= width || y < 0 || y >= height) {
+	        return;
+	    }
+	    if (selectedX == -1 && selectedY == -1) {
+	        Piece touchedPiece = getPieceAt(x, y);
+	        if (touchedPiece != null && touchedPiece.isWhite() == isTurnWhite) {
+	            selectedX = x;
+	            selectedY = y;
+	        }
+	    }
+	    else {
+	        if (selectedX == x && selectedY == y) {
+	            selectedX = -1;
+	            selectedY = -1;
+	        }
+	        else {
+	            Piece selectedPiece = getPieceAt(selectedX, selectedY);
+	            if (selectedPiece != null) {
+	                setPiece(selectedPiece.isWhite(), selectedPiece.getType(), x, y);
+
+	                for (int i = 0; i < pieces.size(); i++) {
+	                    Piece piece = pieces.get(i);
+	                    if (piece.getX() == selectedX && piece.getY() == selectedY) {
+	                        pieces.remove(i);
+	                        break;
+	                    }
+	                }
+
+	                turnNumber++;
+	                isTurnWhite = !isTurnWhite;
+	                
+	                selectedX = -1;
+	                selectedY = -1;
+	            }
+	        }
+	    }
 	}
+		//TODO
 
 	public boolean isSelected(int x, int y) {
+		 return selectedX == x && selectedY == y;
 		//TODO
-		return false;
 	}
 	
 	/* saving-loading feature :*/