typhoon.js

var WebSocket = require('websocket').client;
var request = require('request');
var cheerio = require('cheerio');
var stripJsonComments = require('strip-json-comments');
var moment = require('moment-timezone');
var fs = require('fs');

var hostname = 'ws://typhoon.yumetaro.info/websocket';
var ws = new WebSocket();

ws.on('connectFailed', function(error) {
	console.log(error);
});

ws.on('connect', function(connection) {
	connection.on('message', function(message) {
		var data = JSON.parse(message.utf8Data);
		var songs = data.queue;

		console.log('[' + moment().tz('Asia/Tokyo').format('LLL') + '] Length: ' + songs.length);

		if (songs.length < 5) {
			fs.readFile('playlist.json', function(error, data) {
				var playlist = JSON.parse(stripJsonComments(data.toString()));
				var id = playlist[Math.floor(Math.random() * playlist.length)];

				console.log('[' + moment().tz('Asia/Tokyo').format('LLL') + '] Requesting ' + id);
				request.post({
					url: 'http://typhoon.yumetaro.info/',
					form: {
						url: 'http://www.youtube.com/watch?v=' + id
					}
				}, function(error, response, body) {
					if (error) {
						console.log('[' + moment().tz('Asia/Tokyo').format('LLL') + '] Error: ' + error);
						return;
					}
					$ = cheerio.load(body);
					var alerts = $('div.main > div.alert').text().replace(/(\r\n|\n|\r)/gm, "");
					console.log('[' + moment().tz('Asia/Tokyo').format('LLL') + '] Success(statusCode=' + response.statusCode + '): ' + (alerts ? alerts : 'no alerts'));
				});
			});
		};
	});

	connection.on('close', function() {
		ws.connect(hostname);
	});
});

ws.connect(hostname);