Add on: Youtube link recognizer

Gist: https://gist.github.com/asanrom/c93eb063a57a6937f235df8ee23c1460

Configuration

• Rooms - List of rooms where this feature is available
• Youtube_API_Key - Your own Google API key. You can get one here.

Code

/**
 * Youtube Link Recognition feature for Showdown ChatBot
 * Install as an Add-On
 */

'use strict';

const Rooms = ['youtube']; // here the rooms where this feature is available
const Youtube_API_Key = "AIzaSyAXXYCNGtYjg4ol8UfkbgVR4laHWWoxS00"; // Use your own key

const Response_Text = "**%s**'s link: __%s__ by [[%s]]";
const Response_Text_Allow_Commands = false;

const Youtube_API_Host = "www.googleapis.com";
const Youtube_API_Path = "/youtube/v3/videos?id=%s&key=" + Youtube_API_Key + "&fields=items(snippet(channelTitle,title))&part=snippet";

const Util = require('util');
const Https = require('https');
const Text = Tools('text.js');

exports.setup = function (App) {
	return Tools('add-on').forApp(App).install({
		commandPermissions: {
			"youtube": {group: 'user'},
		},

		events: {
			"userchat": function (room, time, by, msg) {
				if (Rooms.indexOf(room) >= 0 && App.parser.can(by, 'youtube', room)) {
					let name = Text.parseUserIdent(by).name;
					if ((/youtube\.com/i).test(msg) || (/youtu\.be/i).test(msg)) {
						let id = getLinkId(msg);
						if (!id) return;
						let options = {
							host: Youtube_API_Host,
							path: Util.format(Youtube_API_Path, id),
						};
						let request = Https.request(options, response => {
							let str = '';
							response.on('data', function (chunk) {
								str += chunk;
							});
							response.on('end', function () {
								let youtubeData = null;
								try {
									youtubeData = JSON.parse(str);
								} catch (e) {
									App.log("Youtube application failure. Received: " + str);
									return;
								}
								if (youtubeData && youtubeData.items && youtubeData.items.length && youtubeData.items[0].snippet) {
									if (youtubeData.items[0].snippet.title && youtubeData.items[0].snippet.channelTitle) {
										if (Response_Text_Allow_Commands) {
											App.bot.sendTo(room, Util.format(Response_Text, name,
									Text.trim(youtubeData.items[0].snippet.title), Text.trim(youtubeData.items[0].snippet.channelTitle)));
										} else {
											App.bot.sendTo(room, Text.stripCommands(Util.format(Response_Text, name,
									Text.trim(youtubeData.items[0].snippet.title), Text.trim(youtubeData.items[0].snippet.channelTitle))));
										}
									}
								}
							});
							response.on('error', err => {
								App.log("Could not connect to Youtube: " + Util.inspect(err));
							});
						});
						request.on('error', err => {
							App.log("Could not connect to Youtube: " + Util.inspect(err));
						});
						request.end();
					}
				}
			},
		},
	});
};

function getLinkId(msg) {
	msg = msg.split(' ');
	for (let i = 0; i < msg.length; i++) {
		if ((/youtu\.be/i).test(msg[i])) {
			let temp = msg[i].split('/');
			return temp[temp.length - 1];
		} else if ((/youtube\.com/i).test(msg[i])) {
			return msg[i].substring(msg[i].indexOf("=") + 1).replace(".", "");
		}
	}
}