untrusted #js #game solution level 13 (https://alexnisnevich.github.io/untrusted/)

untrusted-lvl13-solution.js

/*
 * robotMaze.js
 *
 * The blue key is inside a labyrinth, and extracting
 * it will not be easy.
 *
 * It's a good thing that you're a AI expert, or
 * we would have to leave empty-handed.
 */

function startLevel(map) {
    // Hint: you can press R or 5 to "rest" and not move the
    // player, while the robot moves around.

    map.getRandomInt = function(min, max) {
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }

    map.placePlayer(map.getWidth()-1, map.getHeight()-1);
    var player = map.getPlayer();

    map.defineObject('robot', {
        'type': 'dynamic',
        'symbol': 'R',
        'color': 'gray',
        'onCollision': function (player, me) {
            me.giveItemTo(player, 'blueKey');
        },
        'behavior': function (me) {
             // constants   
            var debugX = 0, 
                debugY = 10;

            var keyX = map.getWidth() - 2, 
                keyY = 8;

            function setDebugColor(orientation) {
                switch (orientation) {
                    case 'right':
                        map.setSquareColor(debugX, debugY, '#ff1');
                        break;
                    case 'down':
                        map.setSquareColor(debugX, debugY, '#1f1'); 
                        break;
                    case 'left':
                        map.setSquareColor(debugX, debugY, '#11f');
                        break;
                    case 'up':
                        map.setSquareColor(debugX, debugY, '#f11'); 
                        break;
                    default:
                        map.setSquareColor(debugX, debugY, '#fff');
                }
            }

            function turnRight(orientation) { 
                switch (orientation) {
                    case 'right':
                        return 'down';
                    case 'down':
                        return 'left';
                    case 'left':
                        return 'up';
                    case 'up':
                        return 'right';
                    default:
                        return false;
                }    
            }

            function turnLeft(orientation) {
                map.setSquareColor(me.getX(), me.getY(), '#511');
                switch (orientation) {
                    case 'right':
                        return 'up';
                    case 'down':
                        return 'right';
                    case 'left':
                        return 'down';
                    case 'up':
                        return 'left';
                    default:
                        return false;
                }   
            }

            function followTheWall(orientation) {
                var out = turnRight(orientation);
                map.setSquareColor(me.getX(), me.getY(), '#151');
                me.move(out);
                return out;
            }

            
            // init  
            if (typeof this.dir === "undefined") {
                // debug status 
                map.defineObject('debug', {'symbol': '▀', 'color': '#000'} );
                map.placeObject(debugX, debugY, 'debug');
                map.setSquareColor(debugX, debugY, '#fff');   

                //get directions
                if ( me.canMove('right') )
                    this.dir = 'right';
                else if ( me.canMove('down') )
                    this.dir = 'down';
                else if ( me.canMove('left') )
                    this.dir = 'left';
                else if ( me.canMove('up') )
                    this.dir = 'up';  
                // set debug-display
                setDebugColor(this.dir);
            }

            // walk maze
            if (typeof this.found === "undefined") {    
                // get directions
                if (me.canMove(turnRight(this.dir))) 
                    this.dir = followTheWall(this.dir);
                else if (me.canMove(this.dir))
                    me.move(this.dir);
                else
                    this.dir = turnLeft(this.dir);

                // set debug-display
                setDebugColor(this.dir);

                // found key
                if (me.getX() == keyX && me.getY() ==  keyY) {
                    this.found = true;
                    map.setSquareColor(debugX, debugY, '#0f0');
                    map.setSquareColor(debugX, debugY + 1, '#0f0');
                }
            }  
            // search player  
            else {
                if (!map.getPlayer().hasItem('blueKey')) {
                    var player = map.getPlayer();
                    var distX  = me.getX() - player.getX();
                    var distY  = me.getY() - player.getY();
                    var direction;

                    if (distY == 3 && distX == 3) 
                        return;
                    if (distY > 0 && distY >= distX)
                        direction = 'up';
                    else if (distY < 0 && distY < distX)
                        direction = 'down';
                    else if (distX > 0 && distX >= distY)
                        direction = 'left';
                    else
                        direction = 'right';
                    if (me.canMove(direction))
                        me.move(direction);
                } 
                else {
                    map.setSquareColor(me.getX(), me.getY(), '#151');
                    return;
                }
            }
        }
    });

    map.defineObject('barrier', {
        'symbol': '░',
        'color': 'purple',
        'impassable': true,
        'passableFor': ['robot']
    });

    map.placeObject(0, map.getHeight() - 1, 'exit');
    map.placeObject(1, 1, 'robot');
    map.placeObject(map.getWidth() - 2, 8, 'blueKey');
    map.placeObject(map.getWidth() - 2, 9, 'barrier');

    var autoGeneratedMaze = new ROT.Map.DividedMaze(map.getWidth(), 10);
    autoGeneratedMaze.create( function (x, y, mapValue) {
        // don't write maze over robot or barrier
        if ((x == 1 && y == 1) || (x == map.getWidth() - 2 && y >= 8)) {
            return 0;
        } else if (mapValue === 1) { //0 is empty space 1 is wall
            map.placeObject(x,y, 'block');
        } else {
            map.placeObject(x,y,'empty');
        }
    });
}

function validateLevel(map) {
    map.validateExactlyXManyObjects(1, 'exit');
    map.validateExactlyXManyObjects(1, 'robot');
    map.validateAtMostXObjects(1, 'blueKey');
}

function onExit(map) {
    if (!map.getPlayer().hasItem('blueKey')) {
        map.writeStatus("We need to get that key!");
        return false;
    } else {
        return true;
    }
}