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import * as youtubeDL from 'youtube-dl'
import { truncate } from 'lodash'
import { CONFIG, CONSTRAINTS_FIELDS, VIDEO_CATEGORIES } from '../initializers'
import { join } from 'path'
import * as crypto from 'crypto'
import { logger } from './logger'
export type YoutubeDLInfo = {
name: string
description: string
category: number
licence: number
nsfw: boolean
tags: string[]
thumbnailUrl: string
}
function getYoutubeDLInfo (url: string): Promise<YoutubeDLInfo> {
return new Promise<YoutubeDLInfo>((res, rej) => {
const options = [ '-j', '--flat-playlist' ]
youtubeDL.getInfo(url, options, (err, info) => {
if (err) return rej(err)
const obj = normalizeObject(info)
return res(buildVideoInfo(obj))
})
})
}
function downloadYoutubeDLVideo (url: string) {
const hash = crypto.createHash('sha256').update(url).digest('hex')
const path = join(CONFIG.STORAGE.VIDEOS_DIR, hash + '-import.mp4')
logger.info('Importing video %s', url)
const options = [ '-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best', '-o', path ]
return new Promise<string>((res, rej) => {
youtubeDL.exec(url, options, async (err, output) => {
if (err) return rej(err)
return res(path)
})
})
}
// ---------------------------------------------------------------------------
export {
downloadYoutubeDLVideo,
getYoutubeDLInfo
}
// ---------------------------------------------------------------------------
function normalizeObject (obj: any) {
const newObj: any = {}
for (const key of Object.keys(obj)) {
// Deprecated key
if (key === 'resolution') continue
const value = obj[key]
if (typeof value === 'string') {
newObj[key] = value.normalize()
} else {
newObj[key] = value
}
}
return newObj
}
function buildVideoInfo (obj: any) {
return {
name: titleTruncation(obj.title),
description: descriptionTruncation(obj.description),
category: getCategory(obj.categories),
licence: getLicence(obj.license),
nsfw: isNSFW(obj),
tags: getTags(obj.tags),
thumbnailUrl: obj.thumbnail || undefined
}
}
function titleTruncation (title: string) {
return truncate(title, {
'length': CONSTRAINTS_FIELDS.VIDEOS.NAME.max,
'separator': /,? +/,
'omission': ' […]'
})
}
function descriptionTruncation (description: string) {
if (!description || description.length < CONSTRAINTS_FIELDS.VIDEOS.DESCRIPTION.min) return undefined
return truncate(description, {
'length': CONSTRAINTS_FIELDS.VIDEOS.DESCRIPTION.max,
'separator': /,? +/,
'omission': ' […]'
})
}
function isNSFW (info: any) {
return info.age_limit && info.age_limit >= 16
}
function getTags (tags: any) {
if (Array.isArray(tags) === false) return []
return tags
.filter(t => t.length < CONSTRAINTS_FIELDS.VIDEOS.TAG.max && t.length > CONSTRAINTS_FIELDS.VIDEOS.TAG.min)
.map(t => t.normalize())
.slice(0, 5)
}
function getLicence (licence: string) {
if (!licence) return undefined
if (licence.indexOf('Creative Commons Attribution licence') !== -1) return 1
return undefined
}
function getCategory (categories: string[]) {
if (!categories) return undefined
const categoryString = categories[0]
if (!categoryString || typeof categoryString !== 'string') return undefined
if (categoryString === 'News & Politics') return 11
for (const key of Object.keys(VIDEO_CATEGORIES)) {
const category = VIDEO_CATEGORIES[key]
if (categoryString.toLowerCase() === category.toLowerCase()) return parseInt(key, 10)
}
return undefined
}
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