room.js

var request = require('request'),
    util = require('util'),
    m = require('./machine');

require('date-utils');

var roomDynamicStatusUrl = 'http://www.laundryview.com/dynamicRoomData.php?location=%s',
    roomApplianceStatusUrl = 'http://www.laundryview.com/appliance_status_ajax.php?lr=%s';

var roomIdPrefix = 'laundry_room.php?lr=',
    deadStatus = '1:0:0:0:0:0';

Room = function(campus, $room) {
  this.campus = campus;
  this.campusName = campus.name;
  this.name = $room.text().trim();
  this.roomId = $room.attr('href').replace(roomIdPrefix, '');
  this.washers = {};
  this.dryers = {};
  this.lastRefresh = null;
  this.nextRefreshDue = new Date();
};

Room.prototype = {
  parseRoomOutput: function(roomData) {
    var machineId = 1,
        dataRows = roomData.split(/^&|:\n&|:\n$/g);
    dataRows.shift(); dataRows.pop();
    this.washers = {}; this.dryers = {};

    for (var i = 0; i < dataRows.length; i++) {
      try {
        var keyValue = dataRows[i].split('='),
            k = keyValue[0], v = keyValue[1];

        if (v !== deadStatus && k.substring(0, 13) === 'machineStatus') {
          var vs = v.split('\n');
          if (vs.length === 1) {
            this.washers[machineId] = new m.Machine(machineId++, vs[0]);
          } else {
            this.dryers[machineId] = new m.Machine(machineId++, vs[0]);
            this.dryers[machineId] = new m.Machine(machineId++, vs[1]);
          }
        }
      } catch (err) {
        console.log(roomData);
        console.log(dataRows);
        console.log('Error parsing the room: ' + err);
      }
    };
  },
  loadRoom: function(callback) {
    var opts = {
      url: util.format(roomDynamicStatusUrl, this.roomId),
      jar: this.campus.jar
    };

    self = this;

    request(opts, function(error, response, body) {

      function handleRoomUpdateData(r,b) {
        console.log('Loaded room ' + r.roomId);
        r.parseRoomOutput(b);
        r.lastRefresh = new Date();
        r.nextRefreshDue = r.lastRefresh.clone().addMinutes(1);
        callback(null, r);
      }
      
      if (!error && response.statusCode == 200) {

        if (body.length == 0) { // Cookie expired
          self.campus.refreshSession(function(e,r,b) {
            console.log('**** Refreshed session cookie');
            this.loadRoom(callback);
          }.bind(self), true);
        } else {
          console.log('**** Cookie OK');
          handleRoomUpdateData(self,body);
        }

      } else {
        console.log('Could not load room ' + self.roomId);
        callback(error, self);
      }
    }.bind(this));
  },
  toJSON: function() {
    var copy = {},
        exclude = {campus: 1}; // Avoid circular references
    for (var prop in this) {
      if (!exclude[prop] && typeof this[prop] !== 'function') {
        copy[prop] = this[prop];
      }
    }
    return copy;
  }
};

exports.Room = Room;