// ==UserScript==
// @name         StumbleTube
// @namespace    StumbleTube
// @version      1.0
// @description  Play youtube videos from the chat box on StumbleChat
// @author       Goji
// @match        https://stumblechat.com/room/*
// ==/UserScript==
(function () {
// Save the original WebSocket send method to allow overriding
WebSocket.prototype._send = WebSocket.prototype.send;
// Override the WebSocket send method to attach a custom message handler
WebSocket.prototype.send = function (data) {
this._send(data); // Call the original send method
// Ensure the message handler is added only once per WebSocket instance
if (!this._messageHandlerAdded) {
this.addEventListener('message', handleMessage.bind(this), false);
this._messageHandlerAdded = true;
}
};
/**
* Handles incoming WebSocket messages to process YouTube-related commands.
* @param {MessageEvent} msg - The incoming WebSocket message.
*/
function handleMessage(msg) {
// Safely parse the incoming message data as JSON
const wsmsg = safeJSONParse(msg.data);
// If the message is not valid JSON, log an error and exit
if (!wsmsg) {
console.error('Invalid JSON message received:', msg.data);
return;
}
// Define an array of keywords to detect YouTube-related commands
var keywords = ['.youtube', '.video', '.play', '.yt'];
/**
* Converts various YouTube URL formats into a standard format.
* @param {string} url - The YouTube URL to be converted.
* @returns {string|null} - The standardized YouTube link or null if invalid.
*/
function convertToRegularYouTubeLink(url) {
// Regular expression to extract the video ID from different YouTube URL formats
var videoIdRegex = /(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:watch\?v=|embed\/|v\/|shorts\/|.*[?&]v=))([\w-]+)/;
var match = url.match(videoIdRegex);
// If a video ID is found, return the standardized link
if (match && match[1]) {
return 'https://www.youtube.com/watch?v=' + match[1];
}
// Return null if the URL does not match the expected formats
return null;
}
// Loop through the defined keywords to check for a match in the message text
for (var i = 0; i < keywords.length; i++) {
// Check if the "text" property of the message starts with a keyword
if (wsmsg['text'].startsWith(keywords[i])) {
// Extract the query part of the message after the keyword
var query = wsmsg['text'].substring(keywords[i].length).trim();
// Ensure the query is not empty before proceeding
if (query) {
// Attempt to convert the query into a standardized YouTube link
var regularLink = convertToRegularYouTubeLink(query);
// If the query is a valid YouTube link, send it in a formatted message
if (regularLink) {
this._send('{"stumble": "youtube","type": "add","id": "' + regularLink + '","time": 0}');
} else {
// For non-URL queries, treat them as search terms and send as is
this._send('{"stumble": "youtube","type": "add","id": "' + query + '","time": 0}');
}
}
// Exit the loop once the query has been processed
break;
}
}
}
/**
* Safely parses a JSON string, logging an error if parsing fails.
* @param {string} jsonString - The JSON string to parse.
* @returns {Object|null} - The parsed JSON object or null if parsing fails.
*/
function safeJSONParse(jsonString) {
try {
return JSON.parse(jsonString);
} catch (error) {
console.error('Error parsing JSON:', error);
return null;
}
}
})();