server.js

var config = require('./config');
var crypto = require('crypto');
var http = require('http');
var path = require('path');
var express = require('express');
var app = express();
var port = Number(process.env.PORT || 5000);
var server = http.createServer(app).listen(port);
var client;
var bodyParser = require('body-parser');
var knox = require('knox');
var request = require('request');

// wrapper for console output, muted if config.DEBUG is not enabled.
function debug(args) {
  if(config.DEBUG){
    console.log.call(console, args);
  }
}

process.on('uncaughtException', function (err) {
  if (err.stack.indexOf('png-js') !== -1) {
    console.log(err.stack);
  } else {
    console.error(err.stack);
  }
  // console.log("Node NOT Exiting...");
});

var history = [];
var recent = [];

var knoxClient;
knoxClient = knox.createClient({
  key: process.env.AWS_ACCESS_KEY_ID,
  secret: process.env.AWS_SECRET_ACCESS_KEY,
  bucket: process.env.S3_BUCKET
});

if (process.env.REDISCLOUD_URL) {
  var redis = require('redis');
  var url = require('url');
  var redisURL = url.parse(process.env.REDISCLOUD_URL);
  client = redis.createClient(redisURL.port, redisURL.hostname, {no_ready_check: true});
  client.auth(redisURL.auth.split(":")[1]);

  client.get('queue', function (e, r) {
    if (r) {
      queue = JSON.parse(r).queue;
    }
  });
}


app.use(bodyParser({limit: '50mb'}));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());

app.set('views', __dirname + '/views');

app.set('view engine', 'html');
app.set('view engine', 'mustache');
app.engine('html', require('hogan-middleware').__express);
app.engine('mustache', require('hogan-middleware').__express);

app.use(express.static(__dirname + '/public'));

function isCallerMobile(req) {
  var ua = req.headers['user-agent'].toLowerCase(),
    isMobile = /(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(ua) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(ua.substr(0, 4));
 
  return !!isMobile;
}

app.get('/', function(req, res){
  client.get('allIds', function (e, r) {
    if (r) {
      var data = JSON.parse(r);
      var last = data.last;
      console.log(last);
      var ids = data.ids;
      var lastIndex = ids.indexOf(last);
      var recent = ids.slice(lastIndex - 4, lastIndex + 1);
      return res.render('home.mustache', {'js': 'home', 'recent': recent.reverse()});
    }
  });
});

app.get(/^\/([a-z]{3})$/, function(req, res) {
  var id = req.params[0];
  if (client) {
    client.get(id, function (e, r) {
      if (r) {
        var data = JSON.parse(r);
        if (isCallerMobile(req)) {
          getGif(req, res);
        } else {
          var visualizer = (data.visualizer ? data.visualizer : '');
          return res.render('replay.mustache', { 
            'js': 'replay',
            'id': id, 
            'pegs': JSON.stringify(data.pegs),
            'visualizer': data.visualizer,
            'dropDate': data.time
          });
        }
      } else {
        return res.render('404.mustache');
      }
    });
  } else {
    // No DB client, just return a fake run.
    // TODO: this should be an error case.. do an error thing..
    return res.render('replay.mustache', {
      'js': 'replay',
      'id': '1', 
      'pegs': [[0, 1], [.3, 2], [.6, 3]],
      'visualizer': 'attract-mode',
      'dropDate': new Date().getTime()
    });
  }
  // return res.render('home.mustache', {id: req.params[0]});
});


app.get(/^\/([a-z]{3}).gif$/, function(req, res) {
  getGif(req, res);
});


app.get(/^\/([a-z]{3}).png$/, function(req, res) {
  getPng(req, res);
});


function getGif(req, res) {
  http.get('http://plin-co.s3.amazonaws.com/' + req.params[0] + '.gif', function(proxyRes) {
    if (proxyRes.statusCode === 200) {
      proxyRes.pipe(res);
    } else {
      return res.render('404.mustache');
    }
  });
}

function getPng(req, res) {
  http.get('http://plin-co.s3.amazonaws.com/' + req.params[0] + '.png', function(proxyRes) {
    if (proxyRes.statusCode === 200) {
      proxyRes.pipe(res);
    } else {
      return res.render('404.mustache');
    }
  });
}