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YouTube Auto-Liker

Automatically likes videos of channels you're subscribed to

  1. // ==UserScript==
  2. // @name           YouTube Auto-Liker
  3. // @name:zh        YouTube自動點讚
  4. // @name:ja        YouTubeのような自動
  5. // @namespace      https://github.com/HatScripts/YouTubeAutoLiker
  6. // @version        1.2.0
  7. // @description    Automatically likes videos of channels you're subscribed to
  8. // @description:zh 對您訂閲的頻道視頻自動點讚
  9. // @description:ja このスクリプトは、あなたが購読しているチャンネルの動画を自動的に好きです
  10. // @description:ru Этот сценарий автоматически нравится видео каналов, на которые вы подписаны
  11. // @description:es A este script le gustan los videos de los canales a los que está suscrito
  12. // @description:pt Este script gosta automaticamente dos vídeos dos canais aos quais está inscrito
  13. // @author         HatScripts
  14. // @icon           https://cdn.rawgit.com/HatScripts/YouTubeAutoLiker/master/logo.svg
  15. // @match          http://*.youtube.com/watch*
  16. // @match          https://*.youtube.com/watch*
  17. // @require        https://greasyfork.org/scripts/33864-debugger/code/Debugger.js
  18. // @run-at         document-idle
  19. // @noframes
  20. // ==/UserScript==
  21.  
  22. (function () {
  23.     'use strict'
  24.  
  25.     const DEBUG_ENABLED = GM_info.script.version === 'DEV_VERSION'
  26.     const DEBUG = new Debugger(GM_info.script.name, DEBUG_ENABLED)
  27.     const OPTIONS = {
  28.         CHECK_FREQUENCY: 5000,
  29.         WATCH_THRESHOLD: 0.5,
  30.     }
  31.     const SELECTORS = {
  32.         PLAYER:              '#movie_player',
  33.         SUBSCRIPTION_BUTTON: '#subscribe-button paper-button, .yt-uix-subscription-button',
  34.         LIKE_BUTTON:         'ytd-video-primary-info-renderer #top-level-buttons > ytd-toggle-button-renderer:nth-child(1), .like-button-renderer-like-button:not(.hid)',
  35.     }
  36.     const LIKE_BUTTON_CLICKED_CLASSES = ['style-default-active', 'like-button-renderer-like-button-clicked']
  37.  
  38.     let autoLikedVideoIds = []
  39.  
  40.     setTimeout(wait, OPTIONS.CHECK_FREQUENCY)
  41.  
  42.     function getVideoId() {
  43.         let elem = document.querySelector('#page-manager > ytd-watch-flexy')
  44.         if (elem && elem.hasAttribute('video-id')) {
  45.             return elem.getAttribute('video-id')
  46.         } else {
  47.             let queryString = window.location.search
  48.             return queryString.substr(queryString.indexOf('v=') + 2, 11)
  49.         }
  50.     }
  51.  
  52.     function watchThresholdReached() {
  53.         let player = document.querySelector(SELECTORS.PLAYER)
  54.         if (player) {
  55.             return player.getCurrentTime() / player.getDuration() >= OPTIONS.WATCH_THRESHOLD
  56.         }
  57.         return true
  58.     }
  59.  
  60.     function isSubscribed() {
  61.         DEBUG.info('Checking whether subscribed...')
  62.         let subscriptionButton = document.querySelector(SELECTORS.SUBSCRIPTION_BUTTON)
  63.         if (!subscriptionButton) {
  64.             throw 'Couldn\'t find sub button'
  65.         }
  66.         return subscriptionButton.hasAttribute('subscribed') || subscriptionButton.dataset.isSubscribed
  67.     }
  68.  
  69.     function wait() {
  70.         if (watchThresholdReached()) {
  71.             try {
  72.                 if (isSubscribed()) {
  73.                     DEBUG.info('We are subscribed')
  74.                     like()
  75.                 } else {
  76.                     DEBUG.info('We are not subscribed')
  77.                 }
  78.             } catch (e) {
  79.                 DEBUG.info('Failed to like video: ' + e + '. Will try again in 5 seconds...')
  80.             }
  81.         }
  82.         setTimeout(wait, OPTIONS.CHECK_FREQUENCY)
  83.     }
  84.  
  85.     function like() {
  86.         DEBUG.info('Trying to like video...')
  87.         let likeButton = document.querySelector(SELECTORS.LIKE_BUTTON)
  88.         if (!likeButton) {
  89.             throw 'Couldn\'t find like button'
  90.         }
  91.         let videoId = getVideoId()
  92.         if (LIKE_BUTTON_CLICKED_CLASSES.some(c => likeButton.classList.contains(c))) {
  93.             DEBUG.info('Like button has already been clicked')
  94.             autoLikedVideoIds.push(videoId)
  95.         } else if (autoLikedVideoIds.includes(videoId)) {
  96.             DEBUG.info('Video has already been auto-liked. User must ' +
  97.                 'have un-liked it, so we won\'t like it again')
  98.         } else {
  99.             DEBUG.info('Found like button')
  100.             DEBUG.info('It\'s unclicked. Clicking it...')
  101.             likeButton.click()
  102.             autoLikedVideoIds.push(videoId)
  103.             DEBUG.info('Successfully liked video')
  104.         }
  105.     }
  106. }())