server/lib/files-cache/videos-caption-cache.ts

   1 import { join } from 'path'
   2 import { FILES_CACHE, CONFIG } from '../../initializers'
   3 import { VideoModel } from '../../models/video/video'
   4 import { VideoCaptionModel } from '../../models/video/video-caption'
   5 import { AbstractVideoStaticFileCache } from './abstract-video-static-file-cache'
   6
   7 type GetPathParam = { videoId: string, language: string }
   8
   9 class VideosCaptionCache extends AbstractVideoStaticFileCache <GetPathParam> {
  10
  11   private static readonly KEY_DELIMITER = '%'
  12   private static instance: VideosCaptionCache
  13
  14   private constructor () {
  15     super()
  16   }
  17
  18   static get Instance () {
  19     return this.instance || (this.instance = new this())
  20   }
  21
  22   async getFilePath (params: GetPathParam) {
  23     const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(params.videoId, params.language)
  24     if (!videoCaption) return undefined
  25
  26     if (videoCaption.isOwned()) return join(CONFIG.STORAGE.CAPTIONS_DIR, videoCaption.getCaptionName())
  27
  28     const key = params.videoId + VideosCaptionCache.KEY_DELIMITER + params.language
  29     return this.loadFromLRU(key)
  30   }
  31
  32   protected async loadRemoteFile (key: string) {
  33     const [ videoId, language ] = key.split(VideosCaptionCache.KEY_DELIMITER)
  34
  35     const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(videoId, language)
  36     if (!videoCaption) return undefined
  37
  38     if (videoCaption.isOwned()) throw new Error('Cannot load remote caption of owned video.')
  39
  40     // Used to fetch the path
  41     const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
  42     if (!video) return undefined
  43
  44     const remoteStaticPath = videoCaption.getCaptionStaticPath()
  45     const destPath = join(FILES_CACHE.VIDEO_CAPTIONS.DIRECTORY, videoCaption.getCaptionName())
  46
  47     return this.saveRemoteVideoFileAndReturnPath(video, remoteStaticPath, destPath)
  48   }
  49 }
  50
  51 export {
  52   VideosCaptionCache
  53 }