+// Thanks: https://github.com/przemyslawpluta/node-youtube-dl/blob/master/lib/downloader.js
+// We rewrote it to avoid sync calls
+async function updateYoutubeDLBinary () {
+ logger.info('Updating youtubeDL binary.')
+
+ const binDirectory = join(root(), 'node_modules', 'youtube-dl', 'bin')
+ const bin = join(binDirectory, 'youtube-dl')
+ const detailsPath = join(binDirectory, 'details')
+ const url = 'https://yt-dl.org/downloads/latest/youtube-dl'
+
+ await ensureDir(binDirectory)
+
+ return new Promise(res => {
+ request.get(url, { followRedirect: false }, (err, result) => {
+ if (err) {
+ logger.error('Cannot update youtube-dl.', { err })
+ return res()
+ }
+
+ if (result.statusCode !== 302) {
+ logger.error('youtube-dl update error: did not get redirect for the latest version link. Status %d', result.statusCode)
+ return res()
+ }
+
+ const url = result.headers.location
+ const downloadFile = request.get(url)
+ const newVersion = /yt-dl\.org\/downloads\/(\d{4}\.\d\d\.\d\d(\.\d)?)\/youtube-dl/.exec(url)[ 1 ]
+
+ downloadFile.on('response', result => {
+ if (result.statusCode !== 200) {
+ logger.error('Cannot update youtube-dl: new version response is not 200, it\'s %d.', result.statusCode)
+ return res()
+ }
+
+ downloadFile.pipe(createWriteStream(bin, { mode: 493 }))
+ })
+
+ downloadFile.on('error', err => {
+ logger.error('youtube-dl update error.', { err })
+ return res()
+ })
+
+ downloadFile.on('end', () => {
+ const details = JSON.stringify({ version: newVersion, path: bin, exec: 'youtube-dl' })
+ writeFile(detailsPath, details, { encoding: 'utf8' }, err => {
+ if (err) {
+ logger.error('youtube-dl update error: cannot write details.', { err })
+ return res()
+ }
+
+ logger.info('youtube-dl updated to version %s.', newVersion)
+ return res()
+ })
+ })
+ })
+ })
+}
+
+async function safeGetYoutubeDL () {
+ let youtubeDL
+
+ try {
+ youtubeDL = require('youtube-dl')
+ } catch (e) {
+ // Download binary
+ await updateYoutubeDLBinary()
+ youtubeDL = require('youtube-dl')
+ }
+
+ return youtubeDL
+}
+
+function buildOriginallyPublishedAt (obj: any) {
+ let originallyPublishedAt: Date = null
+
+ const uploadDateMatcher = /^(\d{4})(\d{2})(\d{2})$/.exec(obj.upload_date)
+ if (uploadDateMatcher) {
+ originallyPublishedAt = new Date()
+ originallyPublishedAt.setHours(0, 0, 0, 0)
+
+ const year = parseInt(uploadDateMatcher[1], 10)
+ // Month starts from 0
+ const month = parseInt(uploadDateMatcher[2], 10) - 1
+ const day = parseInt(uploadDateMatcher[3], 10)
+
+ originallyPublishedAt.setFullYear(year, month, day)
+ }
+
+ return originallyPublishedAt
+}
+