gistfile1.js

var html = require('fs').readFileSync(__dirname+'/index.html');

var fs = require('fs');

var server = require('http').createServer(function(req, res){
  res.end(html);
});

server.listen(8080);


var nowjs = require("now");
var everyone = nowjs.initialize(server);


var board = new Array();
var chars = "abcdefghijklmnopqrstuvwxyz";

var word_data = {};
var already_checked_words = [];


var func = function(data) {
  word_data[data] = true;
}

var arr = fs.readFileSync('words').toString().split("\n");

for(i in arr)
  func(arr[i]);


for(var i = 0; i < 4; i++)
  for(var j = 0; j < 4; j++) {
    if(!board[i])
      board[i] = new Array();
    board[i][j] = chars[Math.floor(Math.random() * chars.length)];
  }

var check_bounds = function (row, col) {
  if(row < 0 || col < 0 || row > 3 || col > 3)
    return false;
  else
    return true;
}

var build_empty_checked_moves = function() {
  var b = new Array();
  
  for(var i = 0; i < 4; i++)
    for(var j = 0; j < 4; j++) {
      if(!b[i])
        b[i] = new Array();
      b[i][j] = 0;
    }

  return b;
}

var check_move = function (move) {
  if(!word_data[move])
    return false;

  for(i in already_checked_words)
    if(already_checked_words[i] == move)
      return false;
  
  var recursive = function (move, checked, row, col) {
    console.log("Being called with move: " + move);
    if(!check_bounds(row, col)) {
      console.log("Failing for bounds at row: " + row + ", col: " + col);
      return false;
    }

    if(move == "")
      return true;
    if(checked[row][col] == 1)
      return false;
    else if(board[row][col] == move[0]){
      checked[row][col] = 1;
      
      return recursive(move.substring(1), checked, row + 1, col) ||
        recursive(move.substring(1), checked, row + 1, col + 1) ||
        recursive(move.substring(1), checked, row + 1, col - 1) ||
        recursive(move.substring(1), checked, row, col + 1) ||
        recursive(move.substring(1), checked, row, col - 1) ||
        recursive(move.substring(1), checked, row - 1, col) ||
        recursive(move.substring(1), checked, row - 1, col + 1) ||
        recursive(move.substring(1), checked, row - 1, col - 1);
    } else
      return false;
  }
  
  for(var i = 0; i < board.length; i++)
    for(var j = 0; j < board.length; j++)
      if(recursive(move, build_empty_checked_moves(), i, j)) {
        already_checked_words.push(move);
        return true;
      }

  return false;
}

everyone.now.distributeGameMove = function(move){
  if(check_move(move)) {
    everyone.now.receiveMove(this.now.name, move);
    return true;
  }
  else
    return false;
}


nowjs.on('connect', function () { 
  this.now.board = board;
});