show duration for livestreams and present time for archives
// ==UserScript==
// @name Youtube Live Clock
// @name:zh-TW Youtube Live Clock
// @namespace https://greasyfork.org/scripts/453367
// @version 1.8.1
// @description show duration for livestreams and present time for archives
// @description:zh-TW 顯示直播及直播存檔當下的時間
// @author Derek
// @match *://www.youtube.com/*
// @run-at document-start
// @grant GM_addStyle
// ==/UserScript==
(() => {
//you can choose your ideal date format by changing the FORMAT's value below
const FORMAT = 1
/*
1: 2022/10/31 06:37:10 (default)
2: 10/31/2022 06:37:10
3: 31/10/2022 06:37:10
4: Mon 31/10/2022 06:37:10
5: Monday 31/10/2022 06:37:10
6: Monday 31 October 2022 06:37:10
*/
GM_addStyle(`
.ytp-chrome-bottom .ytp-time-display,
.ytp-chrome-bottom .ytp-right-controls {
display: flex !important;
}
#present-time {
margin: 0 10px 0 5px !important;
}
`)
const $ = (element) => document.querySelector(element)
const abbr = {
week: { Sun: 'Sunday', Mon: 'Monday', Tue: 'Tuesday', Wed: 'Wednesday', Thu: 'Thursday', Fri: 'Friday', Sat: 'Saturday' },
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' },
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' }
}
const twoDigit = (num) => num.toString().padStart(2, '0')
const timeFormat = (time) => {
const second = time % 60
const minute = Math.floor((time / 60) % 60)
const hour = Math.floor(time / 3600)
return hour > 0 ? `${hour}:${twoDigit(minute)}:${twoDigit(second)}` : `${minute}:${twoDigit(second)}`
}
const dateFormat = (presentTime) => {
const [week, month, day, year, time] = presentTime.toString().split(' ')
return {
1: ` (${year}/${abbr.month[month]}/${day} ${time})`,
2: ` (${abbr.month[month]}/${day}/${year} ${time})`,
3: ` (${day}/${abbr.month[month]}/${year} ${time})`,
4: ` (${week} ${day}/${abbr.month[month]}/${year} ${time})`,
5: ` (${abbr.week[week]} ${day}/${abbr.month[month]}/${year} ${time})`,
6: ` (${abbr.week[week]} ${day} ${abbr.monthFull[month]} ${year} ${time})`
}[FORMAT]
}
let videoId, timeDisplay, progressBar, liveData, publication, observer
let videoData = null
const waitElements = () => {
return new Promise((resolve) => {
const observer = new MutationObserver(() => {
timeDisplay = $('.ytp-chrome-bottom .ytp-time-display')
progressBar = $('.ytp-chrome-bottom .ytp-progress-bar')
if (timeDisplay && progressBar) {
if (videoData !== $('#microformat script')) {
videoData = $('#microformat script')
observer.disconnect()
resolve()
}
}
})
observer.observe(document.body, { attributes: false, childList: true, subtree: true })
})
}
const getLiveClock = () => {
let clockElement = $('#present-time')
if (!clockElement) {
clockElement = document.createElement('span')
clockElement.id = 'present-time'
timeDisplay.insertBefore(clockElement, timeDisplay.childNodes[1])
}
return clockElement
}
const updateLiveTime = () => {
const progressTime = progressBar.getAttribute('aria-valuenow')
return publication.endDate ? dateFormat(new Date(Date.parse(publication.startDate) + progressTime * 1000)) : timeFormat(progressTime)
}
const main = async (vid) => {
if (videoId === vid) return
videoId = vid
if (observer) observer.disconnect()
await waitElements()
liveData = JSON.parse(videoData.textContent)
if (!liveData.publication) {
if ($('#present-time')) $('#present-time').remove()
return
}
publication = liveData.publication[0]
let liveClock = getLiveClock()
liveClock.textContent = updateLiveTime()
observer = new MutationObserver(() => { liveClock.textContent = updateLiveTime() })
observer.observe(progressBar, { characterData: true, attributeFilter: ['aria-valuenow'] })
}
document.addEventListener('yt-navigate-finish', (event) => {
const url = event.detail.endpoint.commandMetadata.webCommandMetadata.url
if (url.startsWith('/watch?v=') || url.startsWith('/live/')) main(url.match(/[A-z0-9_-]{11}/)[0])
})
})()