# Solution to level 11 in Untrusted: http://alex.nisnevich.com/untrusted/

Home   »   Solution to level 11 in Untrusted: http://alex.nisnevich.com/untrusted/

``````/*
* robot.js
*
* You'll need three keys in order to unlock the
* Algorithm: the red key, the green key, and the
* blue key. Unfortunately, all three of them are
* behind human-proof barriers.
*
* The plan is simple: reprogram the maintenance
* robots to grab the key and bring it through
* the barrier to us.
*
* Let's try it on the red key first.
*/

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

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

map.placePlayer(map.getWidth()-2, map.getHeight()-2);
var player = map.getPlayer();

map.defineObject('robot', {
'type': 'dynamic',
'symbol': 'R',
'color': 'gray',
'onCollision': function (player, me) {
me.giveItemTo(player, 'redKey');
},
'behavior': function (me) {
// Available commands: me.move(direction)
//                 and me.canMove(direction)
if (me.canMove('right')) me.move('right'); else me.move('down');

}
});

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, 'redKey');
map.placeObject(map.getWidth() - 2, 9, 'barrier');

for (var x = 0; x < map.getWidth(); x++) {
map.placeObject(x, 0, 'block');
if (x != map.getWidth() - 2) {
map.placeObject(x, 9, 'block');
}
}

for (var y = 1; y < 9; y++) {
map.placeObject(0, y, 'block');
map.placeObject(map.getWidth() - 1, y, 'block');
}
}

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

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