1 files changed, 133 insertions, 68 deletions

diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
index c49a8c89a..1a48f2bd0 100644
--- a/server/lib/schedulers/videos-redundancy-scheduler.ts
+++ b/server/lib/schedulers/videos-redundancy-scheduler.ts
@@ -1,22 +1,31 @@
 import { AbstractScheduler } from './abstract-scheduler'
-import { CONFIG, REDUNDANCY, VIDEO_IMPORT_TIMEOUT } from '../../initializers'
+import { CONFIG, HLS_REDUNDANCY_DIRECTORY, 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 { move } from 'fs-extra'
 import { getServerActor } from '../../helpers/utils'
 import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
-import { getVideoCacheFileActivityPubUrl } from '../activitypub/url'
+import { getVideoCacheFileActivityPubUrl, getVideoCacheStreamingPlaylistActivityPubUrl } from '../activitypub/url'
 import { removeVideoRedundancy } from '../redundancy'
 import { getOrCreateVideoAndAccountAndChannel } from '../activitypub'
+import { VideoStreamingPlaylistModel } from '../../models/video/video-streaming-playlist'
+import { VideoModel } from '../../models/video/video'
+import { downloadPlaylistSegments } from '../hls'
+
+type CandidateToDuplicate = {
+  redundancy: VideosRedundancy,
+  video: VideoModel,
+  files: VideoFileModel[],
+  streamingPlaylists: VideoStreamingPlaylistModel[]
+}
 
 export class VideosRedundancyScheduler extends AbstractScheduler {
 
   private static instance: AbstractScheduler
-  private executing = false
 
   protected schedulerIntervalMs = CONFIG.REDUNDANCY.VIDEOS.CHECK_INTERVAL
 
@@ -24,41 +33,39 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     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)
+  protected async internalExecute () {
+    for (const redundancyConfig of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
+      logger.info('Running redundancy scheduler for strategy %s.', redundancyConfig.strategy)
 
       try {
-        const videoToDuplicate = await this.findVideoToDuplicate(obj)
+        const videoToDuplicate = await this.findVideoToDuplicate(redundancyConfig)
         if (!videoToDuplicate) continue
 
-        const videoFiles = videoToDuplicate.VideoFiles
-        videoFiles.forEach(f => f.Video = videoToDuplicate)
+        const candidateToDuplicate = {
+          video: videoToDuplicate,
+          redundancy: redundancyConfig,
+          files: videoToDuplicate.VideoFiles,
+          streamingPlaylists: videoToDuplicate.VideoStreamingPlaylists
+        }
 
-        await this.purgeCacheIfNeeded(obj, videoFiles)
+        await this.purgeCacheIfNeeded(candidateToDuplicate)
 
-        if (await this.isTooHeavy(obj, videoFiles)) {
+        if (await this.isTooHeavy(candidateToDuplicate)) {
           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)
+        logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, redundancyConfig.strategy)
 
-        await this.createVideoRedundancy(obj, videoFiles)
+        await this.createVideoRedundancies(candidateToDuplicate)
       } catch (err) {
-        logger.error('Cannot run videos redundancy %s.', obj.strategy, { err })
+        logger.error('Cannot run videos redundancy %s.', redundancyConfig.strategy, { err })
       }
     }
 
     await this.extendsLocalExpiration()
 
     await this.purgeRemoteExpired()
-
-    this.executing = false
   }
 
   static get Instance () {
@@ -70,25 +77,35 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
 
     for (const redundancyModel of expired) {
       try {
-        await this.extendsOrDeleteRedundancy(redundancyModel)
+        const redundancyConfig = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
+        const candidate = {
+          redundancy: redundancyConfig,
+          video: null,
+          files: [],
+          streamingPlaylists: []
+        }
+
+        // If the administrator disabled the redundancy or decreased the cache size, remove this redundancy instead of extending it
+        if (!redundancyConfig || await this.isTooHeavy(candidate)) {
+          logger.info('Destroying redundancy %s because the cache size %s is too heavy.', redundancyModel.url, redundancyModel.strategy)
+          await removeVideoRedundancy(redundancyModel)
+        } else {
+          await this.extendsRedundancy(redundancyModel)
+        }
       } catch (err) {
-        logger.error('Cannot extend expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel))
+        logger.error(
+          'Cannot extend or remove expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel),
+          { err }
+        )
       }
     }
   }
 
-  private async extendsOrDeleteRedundancy (redundancyModel: VideoRedundancyModel) {
-    // Refresh the video, maybe it was deleted
-    const video = await this.loadAndRefreshVideo(redundancyModel.VideoFile.Video.url)
-
-    if (!video) {
-      logger.info('Destroying existing redundancy %s, because the associated video does not exist anymore.', redundancyModel.url)
-
-      await redundancyModel.destroy()
-      return
-    }
-
+  private async extendsRedundancy (redundancyModel: VideoRedundancyModel) {
     const redundancy = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
+    // Redundancy strategy disabled, remove our redundancy instead of extending expiration
+    if (!redundancy) await removeVideoRedundancy(redundancyModel)
+
     await this.extendsExpirationOf(redundancyModel, redundancy.minLifetime)
   }
 
@@ -119,49 +136,93 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     }
   }
 
-  private async createVideoRedundancy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    const serverActor = await getServerActor()
+  private async createVideoRedundancies (data: CandidateToDuplicate) {
+    const video = await this.loadAndRefreshVideo(data.video.url)
 
-    for (const file of filesToDuplicate) {
-      const video = await this.loadAndRefreshVideo(file.Video.url)
+    if (!video) {
+      logger.info('Video %s we want to duplicate does not existing anymore, skipping.', data.video.url)
 
+      return
+    }
+
+    for (const file of data.files) {
       const existingRedundancy = await VideoRedundancyModel.loadLocalByFileId(file.id)
       if (existingRedundancy) {
-        await this.extendsOrDeleteRedundancy(existingRedundancy)
+        await this.extendsRedundancy(existingRedundancy)
 
         continue
       }
 
-      if (!video) {
-        logger.info('Video %s we want to duplicate does not existing anymore, skipping.', file.Video.url)
+      await this.createVideoFileRedundancy(data.redundancy, video, file)
+    }
+
+    for (const streamingPlaylist of data.streamingPlaylists) {
+      const existingRedundancy = await VideoRedundancyModel.loadLocalByStreamingPlaylistId(streamingPlaylist.id)
+      if (existingRedundancy) {
+        await this.extendsRedundancy(existingRedundancy)
 
         continue
       }
 
-      logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy)
+      await this.createStreamingPlaylistRedundancy(data.redundancy, video, streamingPlaylist)
+    }
+  }
 
-      const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
-      const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
+  private async createVideoFileRedundancy (redundancy: VideosRedundancy, video: VideoModel, file: VideoFileModel) {
+    file.Video = video
 
-      const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
+    const serverActor = await getServerActor()
 
-      const destPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(file))
-      await rename(tmpPath, destPath)
+    logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy)
 
-      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
+    const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
+    const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
 
-      await sendCreateCacheFile(serverActor, createdModel)
+    const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
 
-      logger.info('Duplicated %s - %d -> %s.', video.url, file.resolution, createdModel.url)
-    }
+    const destPath = join(CONFIG.STORAGE.REDUNDANCY_DIR, video.getVideoFilename(file))
+    await move(tmpPath, destPath)
+
+    const createdModel = await VideoRedundancyModel.create({
+      expiresOn: this.buildNewExpiration(redundancy.minLifetime),
+      url: getVideoCacheFileActivityPubUrl(file),
+      fileUrl: video.getVideoRedundancyUrl(file, CONFIG.WEBSERVER.URL),
+      strategy: redundancy.strategy,
+      videoFileId: file.id,
+      actorId: serverActor.id
+    })
+
+    createdModel.VideoFile = file
+
+    await sendCreateCacheFile(serverActor, video, createdModel)
+
+    logger.info('Duplicated %s - %d -> %s.', video.url, file.resolution, createdModel.url)
+  }
+
+  private async createStreamingPlaylistRedundancy (redundancy: VideosRedundancy, video: VideoModel, playlist: VideoStreamingPlaylistModel) {
+    playlist.Video = video
+
+    const serverActor = await getServerActor()
+
+    logger.info('Duplicating %s streaming playlist in videos redundancy with "%s" strategy.', video.url, redundancy.strategy)
+
+    const destDirectory = join(HLS_REDUNDANCY_DIRECTORY, video.uuid)
+    await downloadPlaylistSegments(playlist.playlistUrl, destDirectory, VIDEO_IMPORT_TIMEOUT)
+
+    const createdModel = await VideoRedundancyModel.create({
+      expiresOn: this.buildNewExpiration(redundancy.minLifetime),
+      url: getVideoCacheStreamingPlaylistActivityPubUrl(video, playlist),
+      fileUrl: playlist.getVideoRedundancyUrl(CONFIG.WEBSERVER.URL),
+      strategy: redundancy.strategy,
+      videoStreamingPlaylistId: playlist.id,
+      actorId: serverActor.id
+    })
+
+    createdModel.VideoStreamingPlaylist = playlist
+
+    await sendCreateCacheFile(serverActor, video, createdModel)
+
+    logger.info('Duplicated playlist %s -> %s.', playlist.playlistUrl, createdModel.url)
   }
 
   private async extendsExpirationOf (redundancy: VideoRedundancyModel, expiresAfterMs: number) {
@@ -175,8 +236,9 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     await sendUpdateCacheFile(serverActor, redundancy)
   }
 
-  private async purgeCacheIfNeeded (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    while (this.isTooHeavy(redundancy, filesToDuplicate)) {
+  private async purgeCacheIfNeeded (candidateToDuplicate: CandidateToDuplicate) {
+    while (this.isTooHeavy(candidateToDuplicate)) {
+      const redundancy = candidateToDuplicate.redundancy
       const toDelete = await VideoRedundancyModel.loadOldestLocalThatAlreadyExpired(redundancy.strategy, redundancy.minLifetime)
       if (!toDelete) return
 
@@ -184,12 +246,13 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     }
   }
 
-  private async isTooHeavy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    const maxSize = redundancy.size - this.getTotalFileSizes(filesToDuplicate)
+  private async isTooHeavy (candidateToDuplicate: CandidateToDuplicate) {
+    const maxSize = candidateToDuplicate.redundancy.size
 
-    const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(redundancy.strategy)
+    const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(candidateToDuplicate.redundancy.strategy)
+    const totalWillDuplicate = totalDuplicated + this.getTotalFileSizes(candidateToDuplicate.files, candidateToDuplicate.streamingPlaylists)
 
-    return totalDuplicated > maxSize
+    return totalWillDuplicate > maxSize
   }
 
   private buildNewExpiration (expiresAfterMs: number) {
@@ -197,13 +260,15 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
   }
 
   private buildEntryLogId (object: VideoRedundancyModel) {
-    return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
+    if (object.VideoFile) return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
+
+    return `${object.VideoStreamingPlaylist.playlistUrl}`
   }
 
-  private getTotalFileSizes (files: VideoFileModel[]) {
+  private getTotalFileSizes (files: VideoFileModel[], playlists: VideoStreamingPlaylistModel[]) {
     const fileReducer = (previous: number, current: VideoFileModel) => previous + current.size
 
-    return files.reduce(fileReducer, 0)
+    return files.reduce(fileReducer, 0) * playlists.length
   }
 
   private async loadAndRefreshVideo (videoUrl: string) {