http://yahoobingo.herokuapp.com/

yahoo_bingo

/**
 * This is a script to solve Yahoo bingo problem through
 * websockets. http://yahoobingo.herokuapp.com/
 *
 * @author harry_sistalam
 */

var YAHOO_BINGO_URL = 'ws://yahoobingo.herokuapp.com';
var user_obj = {name : 'harry_sistalam',
    email : 'sriharsha.sm@gmail.com',
    url : 'https://gist.github.com/harry1989/7797766'
};

var socket = require('socket.io-client');
var client = socket.connect(YAHOO_BINGO_URL);

/**
 * Called each time a number is drawn
 */
var number_drawn = function(number){
    var parts = number.match(/(\w)(\d+)/),
    row = parts[1],
    num = parts[2];
    check_if_bingo(row, num, number);
};

/**
 * Called when the card is issued
 */
var card_issued = function(payload){
   var slots = payload.slots;
   Object.keys(slots).forEach(function(item, index){
        key_index_map[item] = index;
        bingo_card.push(slots[item]);
        number_card.push(new Array(slots[item].length));
   });
   
   console.log(bingo_card);
};

var number_card = [];
var bingo_card = [];
var key_index_map = {};

var check_if_bingo = function(row, num, number){
    /**
     * Logic here..
     */
    var row_no = key_index_map[row];
    var index = bingo_card[row_no].indexOf(parseInt(num));
    if(index == -1){
        return;
    }else{
        number_card[row_no][index] = 1;
    }
    var row,sum = 0,i,j;
    
    console.log(num); 
    // check if any of the rows match
    for (i = 0; i< 5; i++){
        row = bingo_card[i];
        sum = row.reduce(function(i,o){return i + o});
        if(sum == 5){
            console.log('Found the match in: ' + (i+1) + ' row');
            emit_bingo();
            return;
        }
    }
    
    // check if any of the columns match
    for (i = 0; i < 5; i++){
        sum = 0;
        for (j =0; j < 5; j++){
            val = number_card[j][i] ? number_card[j][i] : 0;
            sum += val;
            if(sum == 5){
                console.log('Found the match in: ' + (i+1) + ' column');
                emit_bingo();
                return;
            }    
        }
    }
    
    // check if the diagnols match
    sum = 0;
    for (i= 0; i < 5; i++){
        val = number_card[i][i] ? number_card[i][i] : 0;
        sum+= val;
    }
    if(sum == 5){
       console.log('Found the match in primary diagnol');
       emit_bingo();
       return;
    }
    // On the secondary column
    sum = 0;
    for (i= 4; i >= 0; i--){
        val = number_card[4-i][i] ? number_card[i][i] : 0;
        sum+= val;
    }
    if(sum == 5){
       console.log('Found the match in secondary diagnol');
       emit_bingo();
       return;
    }
};

function emit_bingo(){
  console.log('Bingo!!!!!');
  client.emit('bingo');
}

/**
 * When the socket gets connected, subscribe for the
 * interested events and attach the proper event handlers
 */

client.on('connect', function(){
    console.log('Connected to Yahoo bingo server');
    client.emit('register',user_obj);
    client.on('card', card_issued);
    client.on('number', number_drawn);
    client.on('disconnect', function(){
        process.exit(0);
    });
    client.on('win', function(){
        console.log('Won the game!');
    });
    client.on('lose', function(){
        console.log('Lost the game :(');
    });
});