// ==UserScript==// @name        YouTube RSS Feed// @namespace   http://greasyfork.org/users/2240-doodles// @author      Doodles// @version     20// @description Adds an RSS feed button to YouTube channels next to the subscribe button// @icon        http://i.imgur.com/Ty5HNbT.png// @icon64      http://i.imgur.com/1FfVvNr.png// @match       *://www.youtube.com/*// @match       *://youtube.com/*// @grant       none// @run-at      document-end// @require     https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js// @license MIT// ==/UserScript==this.$ = this.jQuery = jQuery.noConflict(true);$(function () {"use strict";addRssFeedSupport(true);document.body.addEventListener("yt-navigate-finish", function (event) {addRssFeedSupport(false);});function addRssFeedSupport(firstLoad) {if (isPlaylistPage()) {waitForElement("owner-container", function () {let playlistFeedLink = getPlaylistFeed(getPlatlistId());addRssLink(playlistFeedLink);addRssButtonPlaylist(playlistFeedLink);}, 330);} else if (isVideoPage()) {waitForElement("upload-info", function () {let channelFeedLink = getChannelFeed(getChannelIdFromPage());removeRssLink();addRssLink(channelFeedLink);addRssButton(channelFeedLink);}, 330);} else if (isChannelPage()) {waitForElement("subscribe-button", function () {let channelId = getChannelIdFromPage();if (channelId === null && firstLoad) {removeRssLink();addRefreshButton();} else {let channelFeedLink = getChannelFeed(channelId);removeRssLink();addRssLink(channelFeedLink);addRssButton(channelFeedLink);}}, 330);}}function isPlaylistPage() {return document.URL.indexOf("/playlist?list=") !== -1;}function isVideoPage() {return document.URL.indexOf("/watch") !== -1 && document.URL.indexOf("v=") !== -1;}function isChannelPage() {return $("#channel-header").length > 0;}function getPlatlistId() {let playlistId = document.URL.split("list=")[1].split("&")[0];if (!playlistId.startsWith("PL")) {playlistId = "PL" + playlistId;}return playlistId;}function getChannelIdFromPage() {let channelId = null;// try URLchannelId = getChannelIdFromUrl(document.URL);if (channelId) {return channelId;}// try meta tags that are channel URLslet metaChannelUrlTags = ['og:url','al:ios:url','al:android:url','al:web:url','twitter:url','twitter:app:url:iphone','twitter:app:url:ipad'];for (let i = 0; i < metaChannelUrlTags.length; i++) {let metaPropertyValue = getMetaTagValue(metaChannelUrlTags[i]);channelId = metaPropertyValue ? getChannelIdFromUrl(metaPropertyValue) : null;if (channelId) {return channelId;}}// try meta tags that are channel IDslet metaChannelIdTags = ['channelId'];for (let i = 0; i < metaChannelIdTags.length; i++) {channelId = getMetaTagValue(metaChannelIdTags[i]);if (channelId) {return channelId;}}// try upload info box on video pagelet uploadInfoLink = $("#upload-info a[href*='/channel/']:first");if (uploadInfoLink.length) {let uploadInfoLinkHref = uploadInfoLink.attr("href");channelId = uploadInfoLinkHref ? getChannelIdFromUrl(uploadInfoLinkHref) : null;if (channelId) {return channelId;}}// give upreturn null;}function getChannelIdFromUrl(url) {if (url && url.indexOf("youtube.com/channel/") !== -1) {return url.split("youtube.com/channel/")[1].split("/")[0].split("?")[0];} else {return null;}}function getMetaTagValue(metaPropertyKey) {// <meta property="og:url" content="https://www.youtube.com/channel/UCC8VtutLDSrreNEZj8CU01A">// <meta name="twitter:url" content="https://www.youtube.com/channel/UCC8VtutLDSrreNEZj8CU01A">// <meta itemprop="channelId" content="UCC8VtutLDSrreNEZj8CU01A">let nameAttributes = ['property', 'name', 'itemprop'];let metaProperty = null;for (let i = 0; i < nameAttributes.length; i++) {metaProperty = $("meta[" + nameAttributes[i] + "='" + metaPropertyKey + "']");if (metaProperty.length === 1) {break;}metaProperty = null;}if (metaProperty !== null) {let value = metaProperty.attr("content");if (value) {return value;}}return null;}function getChannelFeed(channelId) {return "https://www.youtube.com/feeds/videos.xml?channel_id=" + channelId;}function getPlaylistFeed(playlistId) {return "https://www.youtube.com/feeds/videos.xml?playlist_id=" + playlistId;}function addRssLink(link) {$("head").append('<link rel="alternate" type="application/rss+xml" title="RSS" href="' +link + '" />');}function removeRssLink() {if ($("link[type='application/rss+xml']").length > 0) {$("link[type='application/rss+xml']").remove();}}function waitForElement(elementId, callbackFunction, intervalLength = 330) {var waitCount = 15000 / intervalLength; // wait 15 seconds maximumvar wait = setInterval(function () {waitCount--;if ($("#" + elementId).length > 0) {callbackFunction();clearInterval(wait);} else if (waitCount <= 0) {console.log("YouTube RSS Feed UserScript - wait for element \"#" + elementId +"\" failed! Time limit (15 seconds) exceeded.");clearInterval(wait);}}, intervalLength);}function addRssButton(link) {if ($("#rssSubButton").length > 0) {$("#rssSubButton").remove();}$("#subscribe-button").css({"display": "flex","flex-flow": "nowrap","height": "37px"}).prepend(makeRssButton(link));}function addRssButtonPlaylist(link) {if ($("#rssSubButton").length === 0) {$("#owner-container > #button").css({"display": "flex","flex-flow": "nowrap","height": "37px"}).prepend(makeRssButton(link));}}function makeRssButton(link) {return $("<a>RSS</a>").attr("id", "rssSubButton").attr("target", "_blank").attr("href", rssLinkToData(link)).attr("download", "feed.rss").css({"background-color": "#fd9b12","border-radius": "3px","padding": "10px 16px","color": "#ffffff","font-size": "14px","text-decoration": "none","text-transform": "uppercase","margin-right": "5px"});}function rssLinkToData(link) {return "data:application/atom+xml,<?xml version=\"1.0\" encoding=\"utf-8\"?>" +"<feed xmlns=\"http://www.w3.org/2005/Atom\">" +"<title type=\"text\">YouTube RSS Button</title>" +"<link rel=\"self\" href=\"" + link + "\" type=\"application/atom+xml\" />" +"</feed>";}function addRefreshButton() {let refreshButton = $("<a>Refresh</a>").attr("id", "rssSubButton").attr("href", "#").css({"background-color": "#fd9b12","border-radius": "3px","padding": "10px 16px","color": "#ffffff","font-size": "14px","text-decoration": "none","text-transform": "uppercase","margin-right": "5px"});$(refreshButton).click(function (e) {e.preventDefault();let r = confirm("Due to how YouTube load pages, there isn't a reliable way to get channel" +" IDs from channel pages if you've navigated to them from another YouTube page." +" The solution is to reload the page.\n\nWould you like to reload the page?");if (r === true) {window.location.reload();}});if ($("#rssSubButton").length > 0) {$("#rssSubButton").remove();}$("#subscribe-button").css({"display": "flex","flex-flow": "nowrap","height": "37px"}).prepend(refreshButton);}});