☰

YoutubePlayBack

Have you ever closed a YouTube video by accident, or have you gone to another one and when you come back the video starts from 0? With this extension it won't happen anymore

Fra 18.02.2024. Se den seneste versjonen.

// ==UserScript==
// @license MIT
// @name         YoutubePlayBack
// @namespace    http://tampermonkey.net/
// @version      1.2
// @description  Have you ever closed a YouTube video by accident, or have you gone to another one and when you come back the video starts from 0? With this extension it won't happen anymore
// @author       Costin Alexandru Sandu
// @match        https://www.youtube.com/watch*
// @icon         https://tse4.mm.bing.net/th/id/OIG3.UOFNuEtdysdoeX0tMsVU?pid=ImgGn
// @grant        none
// ==/UserScript==

(function () {
  'strict'
  var configData = {
    savedProgressAlreadySet: false,
    savingInterval: 1500,
    currentVideoId: null
  }

  function executeFnInPageContext(fn) {
    const fnStringified = fn.toString()
    return window.eval('(' + fnStringified + ')' + '()')
  }

  function getVideoCurrentTime() {
    const currentTime = executeFnInPageContext(() => {
      const player = document.querySelector('#movie_player')
      return player.getCurrentTime()
    })
    return currentTime
  }

  function getVideoId() {
    if (configData.currentVideoId) {
      return configData.currentVideoId
    }
    const id = executeFnInPageContext(() => {
      const player = document.querySelector('#movie_player')
      return player.getVideoData().video_id
    })
    return id
  }

  function playerExists() {
    const exists = executeFnInPageContext(() => {
      const player = document.querySelector('#movie_player')
      return Boolean(player)
    })
    return exists
  }

  function setVideoProgress(progress) {
    window.eval('var progress =' + progress)
    executeFnInPageContext(() => {
      const player = document.querySelector('#movie_player')
      player.seekTo(window.progress)
    })
    window.eval('delete progress')
  }

  function saveVideoProgress() {
    const videoProgress = getVideoCurrentTime()
    const videoId = getVideoId()

    configData.currentVideoId = videoId
    window.localStorage.setItem(videoId, videoProgress)
  }

  function getSavedVideoProgress() {
    const videoId = getVideoId()
    const savedVideoProgress = window.localStorage.getItem(videoId)

    return savedVideoProgress
  }

  function setSavedProgress() {
    const savedProgress = getSavedVideoProgress();
    setVideoProgress(savedProgress)
    configData.savedProgressAlreadySet = true
  }

  function isReadyToSetSavedProgress() {
    return !configData.savedProgressAlreadySet && playerExists() && getSavedVideoProgress()
  }

  function main() {
    if (isReadyToSetSavedProgress()) {
      setSavedProgress()
    }
    saveVideoProgress()
  }

  function initialize() {
    if (isReadyToSetSavedProgress()) {
      setSavedProgress()
    }
    setInterval(main, configData.savingInterval)
  }

  initialize()
})();