last notes castling

Merge branch 'master' of
https://gitarero.ecam.fr/louise.berteloot/OOP_2A5_Project.git

src/backend/Board.java

@@ -188,10 +188,11 @@ public class Board {
 	        return;
 	    }
 	    
+	    //store for castling
 	    int originalX = selectedPiece.getX();
 	    int originalY = selectedPiece.getY();
 
-	    // Detect castling before moving the king
+	    // detects castling 
 	    boolean isCastling = selectedPiece.getType() == PieceType.King && Math.abs(x - originalX) == 2;
 
 	    
@@ -205,21 +206,19 @@ public class Board {
 	    selectedPiece.setX(x);
 	    selectedPiece.setY(y);
 	    
-	    if (isCastling) {
-	        int row = selectedPiece.isWhite() ? 7 : 0;
-	        if (x > originalX) {
-	            // King-side castling
-	            Piece rook = getPieceAt(7, row);
-	            if (rook != null) {
-	                rook.setX(5);
-	                rook.setY(row);
-	                rook.setMoved(true);
+	    if (isCastling) {//checks if the king is eligible for castling
+	        int row = selectedPiece.isWhite() ? 7 : 0;//deduces the row depending on weither the selected king is on white or not (if white, its in row 7, if its black its row 0)
+	        if (x > originalX) {// means we are moving the king towards the right (king side castling)
+	            Piece rook = getPieceAt(7, row);//selects the correct rook to be castled depending on weither the king went right or left (here selects right rook)
+	            if (rook != null) {//if the rook is there
+	                rook.setX(5);//moves the rook to the square to the left of the king
+	                rook.setY(row);//same row
+	                rook.setMoved(true);//the rook has been moved once so wont be used for castling anymore
 	            }
-	        } else {
-	            // Queen-side castling
-	            Piece rook = getPieceAt(0, row);
+	        } else {//king moves to the left this time (queen side castling)
+	            Piece rook = getPieceAt(0, row);//selects the rook on the left
 	            if (rook != null) {
-	                rook.setX(3);
+	                rook.setX(3);//moves rook to the right of the king
 	                rook.setY(row);
 	                rook.setMoved(true);
 	            }

src/backend/Piece.java

@@ -47,11 +47,12 @@ public class Piece {
 	    this.y = y;
 	}
 	
-	private boolean hasMoved = false;
 
-	public boolean hasMoved() {
+	public boolean hasMoved() {//track if a piece has been moved in the past (for castling)
 	    return hasMoved;
 	}
+	
+	private boolean hasMoved = false;//initially, no piece has been moved
 
 	public void setMoved(boolean moved) {
 	    this.hasMoved = moved;