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import { AbstractScheduler } from './abstract-scheduler'
import { CONFIG, JOB_TTL, REDUNDANCY, SCHEDULER_INTERVALS_MS } from '../../initializers'
import { logger } from '../../helpers/logger'
import { VideoRedundancyStrategy, 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 { VideoModel } from '../../models/video/video'
import { getVideoCacheFileActivityPubUrl } from '../activitypub/url'
import { isTestInstance } from '../../helpers/core-utils'
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) {
if (!isTestInstance()) 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)
if (await this.isTooHeavy(obj.strategy, videoFiles, obj.size)) {
if (!isTestInstance()) 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.strategy, videoFiles)
} catch (err) {
logger.error('Cannot run videos redundancy %s.', obj.strategy, { err })
}
}
await this.removeExpired()
this.executing = false
}
static get Instance () {
return this.instance || (this.instance = new this())
}
private async removeExpired () {
const expired = await VideoRedundancyModel.listAllExpired()
for (const m of expired) {
logger.info('Removing expired video %s from our redundancy system.', this.buildEntryLogId(m))
try {
await m.destroy()
} catch (err) {
logger.error('Cannot remove %s video from our redundancy system.', this.buildEntryLogId(m))
}
}
}
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 (strategy: VideoRedundancyStrategy, filesToDuplicate: VideoFileModel[]) {
const serverActor = await getServerActor()
for (const file of filesToDuplicate) {
const existing = await VideoRedundancyModel.loadByFileId(file.id)
if (existing) {
logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', file.Video.url, file.resolution, strategy)
existing.expiresOn = this.buildNewExpiration()
await existing.save()
await sendUpdateCacheFile(serverActor, existing)
continue
}
// We need more attributes and check if the video still exists
const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(file.Video.id)
if (!video) continue
logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, strategy)
const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
const tmpPath = await downloadWebTorrentVideo({ magnetUri }, JOB_TTL['video-import'])
const destPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(file))
await rename(tmpPath, destPath)
const createdModel = await VideoRedundancyModel.create({
expiresOn: new Date(Date.now() + REDUNDANCY.VIDEOS.EXPIRES_AFTER_MS),
url: getVideoCacheFileActivityPubUrl(file),
fileUrl: video.getVideoFileUrl(file, CONFIG.WEBSERVER.URL),
strategy,
videoFileId: file.id,
actorId: serverActor.id
})
createdModel.VideoFile = file
await sendCreateCacheFile(serverActor, createdModel)
}
}
private async isTooHeavy (strategy: VideoRedundancyStrategy, filesToDuplicate: VideoFileModel[], maxSizeArg: number) {
const maxSize = maxSizeArg - this.getTotalFileSizes(filesToDuplicate)
const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(strategy)
return totalDuplicated > maxSize
}
private buildNewExpiration () {
return new Date(Date.now() + REDUNDANCY.VIDEOS.EXPIRES_AFTER_MS)
}
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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