76 lines
2.7 KiB
JavaScript
76 lines
2.7 KiB
JavaScript
const wget = require('wget-improved')
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const DOMPurify = require('isomorphic-dompurify')
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const metadata = require('./metadata.js')
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const hr = require('@tsmx/human-readable')
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async function downloadVideo(url, ws, id) {
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return new Promise(async (resolve, reject) => {
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let quality = '720p'
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const video = await metadata.getVideoMetadata(id)
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if (video.lengthSeconds > 1200) quality = '480p' // 20 minutes
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if (video.lengthSeconds > 2100) quality = '360p' // 35 minutes
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const downloadJson = await metadata.getVideoDownload(url, quality)
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if (downloadJson.status == 'error') {
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resolve({
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message: 'Failed to request Youtube. Please retry...',
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fail: true
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})
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}
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let size = ''
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let startTime = Date.now()
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let prevBytes = 0
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let speed = 0
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const alreadyPrecentages = []
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const download = wget.download(downloadJson.url, `./videos/${id}.webm`)
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download.on('start', fileSize => {
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size = fileSize
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if (ws) ws.send(`DATA - Download has started in ${quality}`)
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})
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download.on('progress', progress => {
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if (alreadyPrecentages.includes((progress*100).toFixed(0))) return
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alreadyPrecentages.push((progress*100).toFixed(0))
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const currentTime = Date.now()
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const elapsedTime = (currentTime - startTime) / 1000
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const currentBytes = progress * size
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const bytesDownloaded = currentBytes - prevBytes
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speed = bytesDownloaded / elapsedTime
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prevBytes = currentBytes
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const speedInMBps = speed / 1048576
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const remainingBytes = size - currentBytes
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const remainingTime = remainingBytes / speed
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if (ws) ws.send(`DATA - [download] ${(progress*100).toFixed(2)}% of ${hr.fromBytes(size)} at ${speedInMBps.toFixed(2)} MB/s ETA ${secondsToTime(remainingTime.toFixed(0))}`)
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})
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download.on('error', err => {
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if (ws) ws.send(`DATA - ${DOMPurify.sanitize(err)}`)
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})
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download.on('end', output => {
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if (output == 'Finished writing to disk') {
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ws.send(`DATA - Download has finished`)
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resolve({
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fail: false
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})
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} else {
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resolve({
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fail: true
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})
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}
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})
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})
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}
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function secondsToTime(seconds) {
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const minutes = Math.floor(seconds / 60);
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const remainingSeconds = seconds % 60;
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const formattedSeconds = remainingSeconds < 10 ? '0' + remainingSeconds : remainingSeconds;
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return `${minutes}:${formattedSeconds}`;
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}
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module.exports = { downloadVideo } |