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import { AbstractScheduler } from './abstract-scheduler'
import { CONFIG, REDUNDANCY, VIDEO_IMPORT_TIMEOUT } from '../../initializers'
import { logger } from '../../helpers/logger'
import { VideosRedundancy } from '../../../shared/models/redundancy'
import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
import { VideoFileModel } from '../../models/video/video-file'
import { downloadWebTorrentVideo } from '../../helpers/webtorrent'
import { join } from 'path'
import { rename } from 'fs-extra'
import { getServerActor } from '../../helpers/utils'
import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
import { getVideoCacheFileActivityPubUrl } from '../activitypub/url'
import { removeVideoRedundancy } from '../redundancy'
import { getOrCreateVideoAndAccountAndChannel } from '../activitypub'
export class VideosRedundancyScheduler extends AbstractScheduler {
private static instance: AbstractScheduler
private executing = false
protected schedulerIntervalMs = CONFIG.REDUNDANCY.VIDEOS.CHECK_INTERVAL
private constructor () {
super()
}
async execute () {
if (this.executing) return
this.executing = true
for (const obj of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
logger.info('Running redundancy scheduler for strategy %s.', obj.strategy)
try {
const videoToDuplicate = await this.findVideoToDuplicate(obj)
if (!videoToDuplicate) continue
const videoFiles = videoToDuplicate.VideoFiles
videoFiles.forEach(f => f.Video = videoToDuplicate)
await this.purgeCacheIfNeeded(obj, videoFiles)
if (await this.isTooHeavy(obj, videoFiles)) {
logger.info('Video %s is too big for our cache, skipping.', videoToDuplicate.url)
continue
}
logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, obj.strategy)
await this.createVideoRedundancy(obj, videoFiles)
} catch (err) {
logger.error('Cannot run videos redundancy %s.', obj.strategy, { err })
}
}
await this.extendsLocalExpiration()
await this.purgeRemoteExpired()
this.executing = false
}
static get Instance () {
return this.instance || (this.instance = new this())
}
private async extendsLocalExpiration () {
const expired = await VideoRedundancyModel.listLocalExpired()
for (const redundancyModel of expired) {
try {
const redundancy = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
await this.extendsExpirationOf(redundancyModel, redundancy.minLifetime)
} catch (err) {
logger.error('Cannot extend expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel))
}
}
}
private async purgeRemoteExpired () {
const expired = await VideoRedundancyModel.listRemoteExpired()
for (const redundancyModel of expired) {
try {
await removeVideoRedundancy(redundancyModel)
} catch (err) {
logger.error('Cannot remove redundancy %s from our redundancy system.', this.buildEntryLogId(redundancyModel))
}
}
}
private findVideoToDuplicate (cache: VideosRedundancy) {
if (cache.strategy === 'most-views') {
return VideoRedundancyModel.findMostViewToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
}
if (cache.strategy === 'trending') {
return VideoRedundancyModel.findTrendingToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
}
if (cache.strategy === 'recently-added') {
const minViews = cache.minViews
return VideoRedundancyModel.findRecentlyAddedToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR, minViews)
}
}
private async createVideoRedundancy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
const serverActor = await getServerActor()
for (const file of filesToDuplicate) {
// We need more attributes and check if the video still exists
const getVideoOptions = {
videoObject: file.Video.url,
syncParam: { likes: false, dislikes: false, shares: false, comments: false, thumbnail: false, refreshVideo: true },
fetchType: 'only-video' as 'only-video'
}
const { video } = await getOrCreateVideoAndAccountAndChannel(getVideoOptions)
const existing = await VideoRedundancyModel.loadLocalByFileId(file.id)
if (existing) {
if (video) {
await this.extendsExpirationOf(existing, redundancy.minLifetime)
} else {
logger.info('Destroying existing redundancy %s, because the associated video does not exist anymore.', existing.url)
await existing.destroy()
}
continue
}
if (!video) {
logger.info('Video %s we want to duplicate does not existing anymore, skipping.', file.Video.url)
continue
}
logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy)
const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
const destPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(file))
await rename(tmpPath, destPath)
const createdModel = await VideoRedundancyModel.create({
expiresOn: this.buildNewExpiration(redundancy.minLifetime),
url: getVideoCacheFileActivityPubUrl(file),
fileUrl: video.getVideoFileUrl(file, CONFIG.WEBSERVER.URL),
strategy: redundancy.strategy,
videoFileId: file.id,
actorId: serverActor.id
})
createdModel.VideoFile = file
await sendCreateCacheFile(serverActor, createdModel)
}
}
private async extendsExpirationOf (redundancy: VideoRedundancyModel, expiresAfterMs: number) {
logger.info('Extending expiration of %s.', redundancy.url)
const serverActor = await getServerActor()
redundancy.expiresOn = this.buildNewExpiration(expiresAfterMs)
await redundancy.save()
await sendUpdateCacheFile(serverActor, redundancy)
}
private async purgeCacheIfNeeded (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
while (this.isTooHeavy(redundancy, filesToDuplicate)) {
const toDelete = await VideoRedundancyModel.loadOldestLocalThatAlreadyExpired(redundancy.strategy, redundancy.minLifetime)
if (!toDelete) return
await removeVideoRedundancy(toDelete)
}
}
private async isTooHeavy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
const maxSize = redundancy.size - this.getTotalFileSizes(filesToDuplicate)
const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(redundancy.strategy)
return totalDuplicated > maxSize
}
private buildNewExpiration (expiresAfterMs: number) {
return new Date(Date.now() + expiresAfterMs)
}
private buildEntryLogId (object: VideoRedundancyModel) {
return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
}
private getTotalFileSizes (files: VideoFileModel[]) {
const fileReducer = (previous: number, current: VideoFileModel) => previous + current.size
return files.reduce(fileReducer, 0)
}
}
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