2048 Autopilot

README.md

This is a autopilot for the game 2048 by gabrielecirulli.

How to use:

1. Open the game
2. If you're using Chrome, open console from Dev tools (F12>Console)
3. Paste the autopilot.js javascript
4. Profit.

You can also type ap_stop() to stop the autopilot and ap_start() to start it again.

autopilot.js

var ap_Tile = function(val,pos){
  this.val = val;
  this.pos = pos;
}
var ap_tiles = [];
ap_Tile.get = function(x,y){
  for (var i = 0; i < ap_tiles.length; i++) {
    if (ap_tiles[i].pos.x == x && ap_tiles[i].pos.y == y){
      return ap_tiles[i];
    }
  };
  return false;
}
var ap_vectors = [
  {x: 0, y:-1},
  {x: 1, y:0},
  {x: 0, y:1},
  {x: -1, y:0},
];

var ap_refresh_tiles = function(){
  ap_tiles = [];
  var ap_t = document.querySelectorAll(".tile");

  for (var i = 0; i < ap_t.length; i++) {
    var ap_c = ap_t[i].classList;
    var ap_v = parseInt(ap_c[1].substr(5));
    var ap_p = {
      x: parseInt(ap_c[2][14]),
      y: parseInt(ap_c[2][16])
    };
    var ap_f = true;
    for (var j = 0; j < ap_tiles.length; j++) {
      if (ap_tiles[j].pos.x == ap_p.x && ap_tiles[j].pos.y == ap_p.y){
        ap_f = false;
        if(ap_tiles[j].val < ap_v){
          ap_tiles[j].val = ap_v;
          break;
        }
      }
    };
    if(ap_f){
      ap_tiles.push(new ap_Tile(ap_v,ap_p));
    }
  };
}

var ap_think = function(){
  ap_refresh_tiles();
  for (var i = 0; i < ap_tiles.length; i++) {
    tile = ap_tiles[i];
    for (var th = 0; th < ap_vectors.length; th++) {
      for (var ra = 1; ra < 4; ra++) {
        var vec = ap_vectors[th];
        var cell   = ap_Tile.get(tile.pos.x + ra*vec.x, tile.pos.y + ra*vec.y);
        if (cell){
          if(cell.val === tile.val) return th;
          else break;
        }
      }
    }
  }
  return -1;
}

var ap_move = function(n){
  var key;
  switch(n){
      case 0: key = 38; break;//up
      case 1: key = 39; break;//right
      case 2: key = 40; break;//down
      case 3: key = 37; break;//left
  }
  if(key){
      var eventObj = document.createEventObject ?
          document.createEventObject() : document.createEvent("Events");
      if(eventObj.initEvent)
        eventObj.initEvent("keydown", true, true);
      eventObj.key = key;
      eventObj.which = key;
      document.dispatchEvent ? document.dispatchEvent(eventObj) : document.fireEvent("onkeydown", eventObj); 
  }
};
var game;
var ap_nextMove = function(){
  var a = ap_think();
  ap_move(a);
};
var ap_play = function(){game = setInterval(ap_nextMove,200); }
var ap_stop = function(){clearInterval(game); }
ap_play();