// ==UserScript==
// @name           YouTube Auto-Liker
// @name:zh        YouTube自動點讚
// @name:ja        YouTubeのような自動
// @namespace      https://github.com/HatScripts/YouTubeAutoLiker
// @version        1.2.0
// @description    Automatically likes videos of channels you're subscribed to
// @description:zh 對您訂閲的頻道視頻自動點讚
// @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
// @description:ru Этот сценарий автоматически нравится видео каналов, на которые вы подписаны
// @description:es A este script le gustan los videos de los canales a los que está suscrito
// @description:pt Este script gosta automaticamente dos vídeos dos canais aos quais está inscrito
// @author         HatScripts
// @icon           https://cdn.rawgit.com/HatScripts/YouTubeAutoLiker/master/logo.svg
// @match          http://*.youtube.com/watch*
// @match          https://*.youtube.com/watch*
// @require        https://greasyfork.org/scripts/33864-debugger/code/Debugger.js
// @run-at         document-idle
// @noframes
// ==/UserScript==
(function () {
'use strict'
const DEBUG_ENABLED = GM_info.script.version === 'DEV_VERSION'
const DEBUG = new Debugger(GM_info.script.name, DEBUG_ENABLED)
const OPTIONS = {
CHECK_FREQUENCY: 5000,
WATCH_THRESHOLD: 0.5,
}
const SELECTORS = {
PLAYER:              '#movie_player',
SUBSCRIPTION_BUTTON: '#subscribe-button paper-button, .yt-uix-subscription-button',
LIKE_BUTTON:         'ytd-video-primary-info-renderer #top-level-buttons > ytd-toggle-button-renderer:nth-child(1), .like-button-renderer-like-button:not(.hid)',
}
const LIKE_BUTTON_CLICKED_CLASSES = ['style-default-active', 'like-button-renderer-like-button-clicked']
let autoLikedVideoIds = []
setTimeout(wait, OPTIONS.CHECK_FREQUENCY)
function getVideoId() {
let elem = document.querySelector('#page-manager > ytd-watch-flexy')
if (elem && elem.hasAttribute('video-id')) {
return elem.getAttribute('video-id')
} else {
let queryString = window.location.search
return queryString.substr(queryString.indexOf('v=') + 2, 11)
}
}
function watchThresholdReached() {
let player = document.querySelector(SELECTORS.PLAYER)
if (player) {
return player.getCurrentTime() / player.getDuration() >= OPTIONS.WATCH_THRESHOLD
}
return true
}
function isSubscribed() {
DEBUG.info('Checking whether subscribed...')
let subscriptionButton = document.querySelector(SELECTORS.SUBSCRIPTION_BUTTON)
if (!subscriptionButton) {
throw 'Couldn\'t find sub button'
}
return subscriptionButton.hasAttribute('subscribed') || subscriptionButton.dataset.isSubscribed
}
function wait() {
if (watchThresholdReached()) {
try {
if (isSubscribed()) {
DEBUG.info('We are subscribed')
like()
} else {
DEBUG.info('We are not subscribed')
}
} catch (e) {
DEBUG.info('Failed to like video: ' + e + '. Will try again in 5 seconds...')
}
}
setTimeout(wait, OPTIONS.CHECK_FREQUENCY)
}
function like() {
DEBUG.info('Trying to like video...')
let likeButton = document.querySelector(SELECTORS.LIKE_BUTTON)
if (!likeButton) {
throw 'Couldn\'t find like button'
}
let videoId = getVideoId()
if (LIKE_BUTTON_CLICKED_CLASSES.some(c => likeButton.classList.contains(c))) {
DEBUG.info('Like button has already been clicked')
autoLikedVideoIds.push(videoId)
} else if (autoLikedVideoIds.includes(videoId)) {
DEBUG.info('Video has already been auto-liked. User must ' +
'have un-liked it, so we won\'t like it again')
} else {
DEBUG.info('Found like button')
DEBUG.info('It\'s unclicked. Clicking it...')
likeButton.click()
autoLikedVideoIds.push(videoId)
DEBUG.info('Successfully liked video')
}
}
}())