tvguide/example/guide.js

Node module that auto-gets current (Dutch) tv show information

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Node.js example script to use the tvguide module                                          *
 *                                                                                           *
 * The main purpose of this script is to show how to interface between the tvguide module    *
 *  and a HTML-client (in this case a web-app designed for smartphone)                       *
 * The included web folder contains an example web app, reachable at localhost:PORT          *
 * Be sure to manually npm-install all includes!                                             *
 *                                                                                           *
 * All relevant variables can be set in the User settings section below                      *
 *                                                                                           *
 * Lirc (Linux Infrared Remote Control) is also implemented to provide IR-control of your TV *
 * If you don't have Lirc, its sections are labeled with @OPTIONAL, so feel free to remove   *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/* User settings
 * 
 * To customize the channels, keep debug true and check the console for the available channels
 * The requests and triggers are socket.emit commands
 */
var PORT = 8080;
var debug = true;
var channels = [1, 2, 3, 4, 31, 36, 46, 92, 34, 37, 89, 25, 91, 18, 29];

var updateTrigger = 'ack:update';
var progressTrigger = 'ack:progresses';

var initRequest = 'req:init';
var initAcknowledge = 'ack:init';

/* @OPTIONAL Lirc user settings
 */
var lircRemote = 'LGRemote';
var lircOkCommand = 'OK';

var lircCommandRequest = 'req:command';
var lircChannelRequest = 'req:channel';

/* Includes
 */
var http = require('http')
    , express = require('express')
    , app = express()
    , server = http.Server(app)
    , io = require('socket.io').listen(server)
    , lirc = require('lirc_node')
    , tvguide = require('tvguide')
;

/* Setup web server
 */
app.use(express.static(__dirname + '/web'));
server.listen(PORT, null);

/* @OPTIONAL setup Lirc
 */
lirc.init();

/* Setup and start tvguide
 */
tvguide.SetDebug(debug);
tvguide.SetGuideTimezoneOffset(0);
tvguide.SetChannels(channels, function () {
    /* Start auto-updating guide 
     */
    tvguide.Start(function (err, channels, guide) {
        if (err) throw new Error(err);
        /* Will be called each time there is/are new show(s)
         * @channels channels that have new shows
         * @guide the entire guide
         */
        io.sockets.emit(updateTrigger, channels, guide);
    });
    /* Start auto-updating show progress getter
     * Called every 60 s, since seconds are not calculated
     */
    tvguide.StartProgress(60000, function (progresses) {
        /* Will be called every minute, @callback(updated progresses) 
         */
        io.sockets.emit(progressTrigger, progresses);
    });
});

/* Setup socket.io
 */
io.sockets.on('connection', function (socket) {
    /* On client request, send initialization data
     */
    socket.on(initRequest, function () {
        var guide = tvguide.GetGuide();
        var channels = tvguide.GetChannels();
        socket.emit(initAcknowledge, channels, guide);
        var progresses = tvguide.GetProgresses();
        socket.emit(progressTrigger, progresses);
    });

    /* @OPTIONAL On client request, send lirc command
     */
    socket.on(lircCommandRequest, function (command) {
        lirc.irsend.send_once(lircRemote, command);
    });

    /* @OPTIONAL On client request, send lirc sequence to start a channel
     */
    socket.on(lircChannelRequest, function (channel) {
        var channelNumber = parseInt(channel) + 1;
        var digits = channelNumber.toString().split('');
        lirc.irsend.send_once(lircRemote, digits[0], function () {
            if (channelNumber >= 10) {
                lirc.irsend.send_once(lircRemote, digits[1], function () {
                    lirc.irsend.send_once(lircRemote, lircOkCommand);
                });
            }
            else {
                lirc.irsend.send_once(lircRemote, lircOkCommand);
            }
        });
    });
});