Lesson 4 Activity 4

package Lesson4;
import kareltherobot.World;
import kareltherobot.Robot;
//This program checks to see if the right is clear in order to determine whether or not to fill the potholes

public class Activity4Main extends Robot{
    /**
     * Constructor for Activity4Main class
     * @param a
     * @param s
     * @param d
     * @param b
     * @ return - none
     */
    public Activity4Main (int a, int s, Direction d, int b){
        super(a,s,d,b);
    }

    public static void main(String[] args){
        World.readWorld("Lesson4World3.kwld");
        World.setDelay(80);
        World.setVisible();
        //Creates a new robot
        Activity4Main gary = new Activity4Main(3,1,North, -1);
        gary.turnRight();
        //Runs overridden move method in for loop
        for(int i = 0; i<9;i++) {
            gary.move();
        }
    }

    /**
     * Overrides the move method to take into account if the robot needs to fill pot hole
     * @ param - none
     * @ return - void
     */
    public void move(){
        //If the right is not clear robot continues to move
        if(!(rightIsClear())){
            super.move();
        }
        //If the right is clear the robot fills the pothole and then continues to move
        else{
            super.move();
            putBeeper();
            turnBack();
            super.move();
            turnRight();
            super.move();
        }
    }

    /**
     * This checks to see if the right is clear
     * @ param - none
     * @return - true/false
     */
    public boolean rightIsClear(){
        turnRight();
        //If front is clear after the robot turns right, then the method returns true
        if(frontIsClear()){
            return true;
        }
        //If it is not clear the robot turns left again and the method returns false
        turnLeft();
        return false;
    }

    /**
     * Allows robot to turn right
     * @ param - none
     * @ return - void
     */
    public void turnRight(){
        int delay = World.delay();
        World.setDelay(0);
        turnLeft();
        turnLeft();
        World.setDelay(delay);
        turnLeft();
    }

    /**
     * Allows robot to turn back
     * @ param - none
     * @ return - void
     */
    public void turnBack(){
        turnLeft();
        turnLeft();
    }
}