bishop.cpp

#include "bishop.h"

Bishop::Bishop(QString _pos, enum Color _color, QString _name):Piece(_pos, _color,_name,'B')
{

}
/**
 * @brief Bishop::isMoveLegal Bishop can move in any direction, but only diagonally.
 * Important to check if any piece is blocking the move.
 * @param squareName QString
 * @param pieceAtNewLocation QString
 * @param arr Piece** array representing the board
 * @return bool
 */
bool Bishop::isMoveLegal(QString squareName, Piece* pieceAtNewLocation, Piece** arr){

    if(isMovementLegal(squareName)){
        if(isMovementBlocked(squareName, arr)){
            return false;
        } else {
            if(pieceAtNewLocation){
                if(pieceAtNewLocation->getColor() == color){
                    return false;
                } else {
                    return true;
                }
            } else {
                return true;
            }
        }
    }
    return false;
}



bool Bishop::isMovementBlocked(QString to, Piece** arr)
{
    char currentColumn = currentPosition.at(0).toLatin1();
    char currentRow = currentPosition.at(1).toLatin1();

    char newColumn = to.at(0).toLatin1();
    char newRow = to.at(1).toLatin1();

    int rowDifference = newRow-currentRow;
    int colDifference = newColumn-currentColumn;

    int rowAbs = abs(rowDifference);

    for(int i=1;i<rowAbs;i++){
        QString tempPosition;

        if(colDifference > 0){
            tempPosition.append(currentColumn+i);
        } else{
            tempPosition.append(currentColumn-i);
        }
        if(rowDifference > 0){
            tempPosition.append(currentRow+i);
        } else {
            tempPosition.append(currentRow-i);
        }
        int tempIndex = convertMoveToIndex(tempPosition);
        if(arr[tempIndex]){
            return true;
        }
    }

    return false;
}

bool Bishop::isMovementLegal(QString to){
    char currentColumn = currentPosition.at(0).toLatin1();
    char currentRow = currentPosition.at(1).toLatin1();

    char newColumn = to.at(0).toLatin1();
    char newRow = to.at(1).toLatin1();

    int rowDifference = newRow-currentRow;
    int colDifference = newColumn-currentColumn;

    int rowAbs = abs(rowDifference);
    int colAbs = abs(colDifference);
    //If these two values are the same, the move is diagonally
    return rowAbs == colAbs;
}