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import { Mutex } from 'async-mutex'
import { remove } from 'fs-extra'
import { extname, join } from 'path'
import { logger, loggerTagsFactory } from '@server/helpers/logger'
import { extractVideo } from '@server/helpers/video'
import { CONFIG } from '@server/initializers/config'
import { DIRECTORIES } from '@server/initializers/constants'
import { MStreamingPlaylistVideo, MVideo, MVideoFile, MVideoFileStreamingPlaylistVideo, MVideoFileVideo } from '@server/types/models'
import { buildUUID } from '@shared/extra-utils'
import { VideoStorage } from '@shared/models'
import { makeHLSFileAvailable, makeWebVideoFileAvailable } from './object-storage'
import { getHLSDirectory, getHLSRedundancyDirectory, getHlsResolutionPlaylistFilename } from './paths'
import { isVideoInPrivateDirectory } from './video-privacy'
type MakeAvailableCB <T> = (path: string) => Promise<T> | T
const lTags = loggerTagsFactory('video-path-manager')
class VideoPathManager {
private static instance: VideoPathManager
// Key is a video UUID
private readonly videoFileMutexStore = new Map<string, Mutex>()
private constructor () {}
getFSHLSOutputPath (video: MVideo, filename?: string) {
const base = getHLSDirectory(video)
if (!filename) return base
return join(base, filename)
}
getFSRedundancyVideoFilePath (videoOrPlaylist: MVideo | MStreamingPlaylistVideo, videoFile: MVideoFile) {
if (videoFile.isHLS()) {
const video = extractVideo(videoOrPlaylist)
return join(getHLSRedundancyDirectory(video), videoFile.filename)
}
return join(CONFIG.STORAGE.REDUNDANCY_DIR, videoFile.filename)
}
getFSVideoFileOutputPath (videoOrPlaylist: MVideo | MStreamingPlaylistVideo, videoFile: MVideoFile) {
const video = extractVideo(videoOrPlaylist)
if (videoFile.isHLS()) {
return join(getHLSDirectory(video), videoFile.filename)
}
if (isVideoInPrivateDirectory(video.privacy)) {
return join(DIRECTORIES.VIDEOS.PRIVATE, videoFile.filename)
}
return join(DIRECTORIES.VIDEOS.PUBLIC, videoFile.filename)
}
async makeAvailableVideoFile <T> (videoFile: MVideoFileVideo | MVideoFileStreamingPlaylistVideo, cb: MakeAvailableCB<T>) {
if (videoFile.storage === VideoStorage.FILE_SYSTEM) {
return this.makeAvailableFactory(
() => this.getFSVideoFileOutputPath(videoFile.getVideoOrStreamingPlaylist(), videoFile),
false,
cb
)
}
const destination = this.buildTMPDestination(videoFile.filename)
if (videoFile.isHLS()) {
const playlist = (videoFile as MVideoFileStreamingPlaylistVideo).VideoStreamingPlaylist
return this.makeAvailableFactory(
() => makeHLSFileAvailable(playlist, videoFile.filename, destination),
true,
cb
)
}
return this.makeAvailableFactory(
() => makeWebVideoFileAvailable(videoFile.filename, destination),
true,
cb
)
}
async makeAvailableResolutionPlaylistFile <T> (videoFile: MVideoFileStreamingPlaylistVideo, cb: MakeAvailableCB<T>) {
const filename = getHlsResolutionPlaylistFilename(videoFile.filename)
if (videoFile.storage === VideoStorage.FILE_SYSTEM) {
return this.makeAvailableFactory(
() => join(getHLSDirectory(videoFile.getVideo()), filename),
false,
cb
)
}
const playlist = videoFile.VideoStreamingPlaylist
return this.makeAvailableFactory(
() => makeHLSFileAvailable(playlist, filename, this.buildTMPDestination(filename)),
true,
cb
)
}
async makeAvailablePlaylistFile <T> (playlist: MStreamingPlaylistVideo, filename: string, cb: MakeAvailableCB<T>) {
if (playlist.storage === VideoStorage.FILE_SYSTEM) {
return this.makeAvailableFactory(
() => join(getHLSDirectory(playlist.Video), filename),
false,
cb
)
}
return this.makeAvailableFactory(
() => makeHLSFileAvailable(playlist, filename, this.buildTMPDestination(filename)),
true,
cb
)
}
async lockFiles (videoUUID: string) {
if (!this.videoFileMutexStore.has(videoUUID)) {
this.videoFileMutexStore.set(videoUUID, new Mutex())
}
const mutex = this.videoFileMutexStore.get(videoUUID)
const releaser = await mutex.acquire()
logger.debug('Locked files of %s.', videoUUID, lTags(videoUUID))
return releaser
}
unlockFiles (videoUUID: string) {
const mutex = this.videoFileMutexStore.get(videoUUID)
mutex.release()
logger.debug('Released lockfiles of %s.', videoUUID, lTags(videoUUID))
}
private async makeAvailableFactory <T> (method: () => Promise<string> | string, clean: boolean, cb: MakeAvailableCB<T>) {
let result: T
const destination = await method()
try {
result = await cb(destination)
} catch (err) {
if (destination && clean) await remove(destination)
throw err
}
if (clean) await remove(destination)
return result
}
private buildTMPDestination (filename: string) {
return join(CONFIG.STORAGE.TMP_DIR, buildUUID() + extname(filename))
}
static get Instance () {
return this.instance || (this.instance = new this())
}
}
// ---------------------------------------------------------------------------
export {
VideoPathManager
}
|
