script.js

/**
  Author: ironmaniiith
  Date Created: 16 July 2016
  Website: https://github.com/ironmaniiith
  Description: Script for winning the mi.com Pair 2 win (http://www.mi.com/in/events/2ndanniversary/playgame/)
                Play here: http://mobile.mi.com/in/events/2ndanniversary/playgame/level/
  */

/**
  dispatchMouseEvent:
  Credits: http://stackoverflow.com/questions/4158847/is-there-a-way-to-simulate-key-presses-or-a-click-with-javascript#answer-4176116
  */
var dispatchMouseEvent = function(target, var_args) {
  var e = document.createEvent("MouseEvents");
  e.initEvent.apply(e, Array.prototype.slice.call(arguments, 1));
  target.dispatchEvent(e);
};

function properClick(el) {
    ['mouseover', 'mousedown', 'click', 'mouseup'].forEach(function(val){
        dispatchMouseEvent(el, val, true, true);
    });
}
/** Click on the `node` after `time` ms */
function clickNode(node, time){
    setTimeout(function(){
        properClick(node);
    }, time);
    return;
}


/** Cache some methods */
var Floor = Math.floor;
var arraySlice = Array.prototype.slice;

/** Globals */
var pairs = [],
  i = -1,
  selector = 1;

/** Extras */
function getDimensions() {
    var section = document.getElementById('J_playSection');
    var totalBlocks = section.getElementsByTagName('li').length;
    var row = section.getElementsByTagName('ul').length;
    var col = totalBlocks / row;
    return {row: row, col: col};
}


/** Board processing starts here */
function processBoard() {
    var x = arraySlice.call(document.getElementsByClassName('front'));
    var board = [];
    var dim = getDimensions();
    var n = dim.row,
        m = dim.col;

    /** Prepare the board array from the cards */
    x.forEach(function(val, index, arr){
        if (index % 2 === 1) {
            tag = val.getElementsByTagName('img')[0];
            tag ? board.push({img: tag, imgSrc: tag.src}) : console.log('Error: ' + index);
        }
    });
    var boardImgSrc = board.map(function(e){ return e.imgSrc });

    /** Extract the paired cards from board array */
    var pairs = [];
    board.forEach(function(val, index, arr){
        var img = val.img;
        var imgSrc = val.imgSrc;
        var conjugate;
        arr[index + 1] ? (conjugate = boardImgSrc.indexOf(imgSrc, index + 1)) : console.log('Skipping: ' + (index + 1));
        (conjugate && conjugate !== -1) ? pairs.push({0: val, 1: arr[conjugate]}) : console.log('Skipping: ' + (index + 1));
    });
    return pairs;
}

function startGame() {
    /** Initialize `i` and `selector` in opposite sense */
    i = -1;
    selector = 1;
    pairs = processBoard();
    /* Start with a fake click */
    properClick(document.head, 0);
}


/** Game playing by clicking logic */
/** Let's rock and roll */
function listenerDevOps(e) {
    var time = 1200; /* Time gap before first paired card opening */
    (selector === 1) ? i++ : time = 700; /* Time gap before second paired card opening */
    selector ^= 1;
    var pair = pairs[i];
    if (pair) {
        var next = pair[selector].img.closest('li');
        clickNode(next, time);
    }
}
document.addEventListener('mouseup', listenerDevOps);

startGame();

/** Keep track of next level popup */
var observer = new MutationObserver(function(mutations) {
    mutations.forEach(function(mutationRecord) {
        var popupDiv = mutationRecord['target'],
            divClass = popupDiv ? popupDiv['className'] : undefined;
        if (divClass === 'popup') {
            var decision = confirm('Congratulations! Your bot won the game, do you want to automate one more round.?');
            if (decision) {
                var replayButton = document.getElementsByClassName('btn replay-btn')[0];
                setTimeout(function(){
                    replayButton.click()
                    setTimeout(startGame, 2000); /* Start playing game again after 2000 ms */
                }, 500);
            } else {
                observer.disconnect();
                document.removeEventListener('mouseup', listenerDevOps);
                alert('Thanks for using bot /** Author: Ironmaniiith */');
            }
            return ;
        }
    });    
});

var target = document.getElementById('J_priceSection');
observer.observe(target, { attributes : true, attributeFilter: ['class']});