☰

Youtube Live Clock

show duration for livestreams and present time for archives

  1. // ==UserScript==
  2. // @name               Youtube Live Clock
  3. // @name:zh-TW         Youtube Live Clock
  4. // @namespace          https://greatest.deepsurf.us/scripts/453367
  5. // @version            1.7.3
  6. // @description        show duration for livestreams and present time for archives
  7. // @description:zh-TW  顯示直播及直播存檔當下的時間
  8. // @author             Derek
  9. // @match              *://www.youtube.com/*
  10. // @grant              none
  11. // ==/UserScript==
  12.  
  13. //you can choose your ideal date format by changing the FORMAT's value below
  14. const FORMAT = 1
  15. /*
  16.   1: 2022/10/31 06:37:10 (default)
  17.   2: 10/31/2022 06:37:10
  18.   3: 31/10/2022 06:37:10
  19.   4: Mon 31/10/2022 06:37:10
  20.   5: Monday 31/10/2022 06:37:10
  21.   6: Monday 31 October 2022 06:37:10
  22. */
  23.  
  24. const $ = (element) => document.querySelector(element)
  25.  
  26. const abbr = {
  27.   week: { Sun: 'Sunday', Mon: 'Monday', Tue: 'Tuesday', Wed: 'Wednesday', Thu: 'Thursday', Fri: 'Friday', Sat: 'Saturday' },
  28.   monthFull: { Jan: 'January', Feb: 'February', Mar: 'March', Apr: 'April', May: 'May', Jun: 'June', Jul: 'July', Aug: 'August', Sep: 'September', Oct: 'October', Nov: 'November', Dec: 'December' },
  29.   month: { Jan: '01', Feb: '02', Mar: '03', Apr: '04', May: '05', Jun: '06', Jul: '07', Aug: '08', Sep: '09', Oct: '10', Nov: '11', Dec: '12' }
  30. }
  31.  
  32. const twoDigit = (num) => num.toString().padStart(2, '0')
  33.  
  34. const timeFormat = (time) => {
  35.   const second = time % 60
  36.   const minute = Math.floor((time / 60) % 60)
  37.   const hour = Math.floor(time / 3600)
  38.   return hour > 0 ? `${hour}:${twoDigit(minute)}:${twoDigit(second)}` : `${minute}:${twoDigit(second)}`
  39. }
  40.  
  41. const dateFormat = (presentTime) => {
  42.   const [week, month, day, year, time] = presentTime.toString().split(' ')
  43.   return {
  44.     1: ` (${year}/${abbr.month[month]}/${day} ${time})`,
  45.     2: ` (${abbr.month[month]}/${day}/${year} ${time})`,
  46.     3: ` (${day}/${abbr.month[month]}/${year} ${time})`,
  47.     4: ` (${week} ${day}/${abbr.month[month]}/${year} ${time})`,
  48.     5: ` (${abbr.week[week]} ${day}/${abbr.month[month]}/${year} ${time})`,
  49.     6: ` (${abbr.week[week]} ${day} ${abbr.monthFull[month]} ${year} ${time})`
  50.   } [FORMAT]
  51. }
  52.  
  53. let videoId, liveBadge, timeDisplay, progressBar, liveData, publication, observer
  54. let videoData = null
  55.  
  56. const waitElements = () => {
  57.   return new Promise((resolve) => {
  58.     const observer = new MutationObserver(() => {
  59.       liveBadge = $('.ytp-chrome-bottom .ytp-live-badge')
  60.       timeDisplay = $('.ytp-chrome-bottom .ytp-time-display')
  61.       progressBar = $('.ytp-chrome-bottom .ytp-progress-bar')
  62.  
  63.       if (liveBadge && timeDisplay && progressBar) {
  64.         if (videoData !== $('#microformat script')) {
  65.           videoData = $('#microformat script')
  66.           observer.disconnect()
  67.           resolve()
  68.         }
  69.       }
  70.     })
  71.     observer.observe(document.body, { attributes: false, childList: true, subtree: true })
  72.   })
  73. }
  74.  
  75. const getLiveClock = () => {
  76.   let clockElement = $('#present-time')
  77.   if (!clockElement) {
  78.     clockElement = document.createElement('span')
  79.     clockElement.setAttribute('id', 'present-time')
  80.     timeDisplay.insertBefore(clockElement, timeDisplay.childNodes[1])
  81.   }
  82.   return clockElement
  83. }
  84.  
  85. const updateLiveTime = () => {
  86.   const progressTime = progressBar.getAttribute('aria-valuenow')
  87.   return publication.endDate ? dateFormat(new Date(Date.parse(publication.startDate) + progressTime * 1000)) : timeFormat(progressTime)
  88. }
  89.  
  90. const main = async (vid) => {
  91.   if (videoId === vid) return
  92.   videoId = vid
  93.  
  94.   if (observer) observer.disconnect()
  95.   await waitElements()
  96.  
  97.   liveData = JSON.parse(videoData.textContent)
  98.   if (!liveData.publication) {
  99.     if ($('#present-time')) $('#present-time').remove()
  100.     return
  101.   }
  102.   publication = liveData.publication[0]
  103.  
  104.   liveBadge.style = 'margin-left: 10px'
  105.   let liveClock = getLiveClock()
  106.   liveClock.textContent = updateLiveTime()
  107.  
  108.   observer = new MutationObserver(() => { liveClock.textContent = updateLiveTime() })
  109.   observer.observe(progressBar, { characterData: true, attributeFilter: ['aria-valuenow'] })
  110. }
  111.  
  112. document.addEventListener('yt-navigate-finish', (event) => {
  113.   const url = event.detail.endpoint.commandMetadata.webCommandMetadata.url
  114.   if (url.startsWith('/watch?v=') || url.startsWith('/live/')) main(url.match(/[A-z0-9_-]{11}/)[0])
  115. })