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

   1 import { join } from 'path'
   2 import { FILES_CACHE } from '../../initializers/constants'
   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 import { CONFIG } from '../../initializers/config'
   7 import { logger } from '../../helpers/logger'
   8 import { doRequestAndSaveToFile } from '@server/helpers/requests'
   9
  10 type GetPathParam = { videoId: string, language: string }
  11
  12 class VideosCaptionCache extends AbstractVideoStaticFileCache <GetPathParam> {
  13
  14   private static readonly KEY_DELIMITER = '%'
  15   private static instance: VideosCaptionCache
  16
  17   private constructor () {
  18     super()
  19   }
  20
  21   static get Instance () {
  22     return this.instance || (this.instance = new this())
  23   }
  24
  25   async getFilePathImpl (params: GetPathParam) {
  26     const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(params.videoId, params.language)
  27     if (!videoCaption) return undefined
  28
  29     if (videoCaption.isOwned()) return { isOwned: true, path: join(CONFIG.STORAGE.CAPTIONS_DIR, videoCaption.getCaptionName()) }
  30
  31     const key = params.videoId + VideosCaptionCache.KEY_DELIMITER + params.language
  32     return this.loadRemoteFile(key)
  33   }
  34
  35   protected async loadRemoteFile (key: string) {
  36     logger.debug('Loading remote caption file %s.', key)
  37
  38     const [ videoId, language ] = key.split(VideosCaptionCache.KEY_DELIMITER)
  39
  40     const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(videoId, language)
  41     if (!videoCaption) return undefined
  42
  43     if (videoCaption.isOwned()) throw new Error('Cannot load remote caption of owned video.')
  44
  45     // Used to fetch the path
  46     const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
  47     if (!video) return undefined
  48
  49     const remoteUrl = videoCaption.getFileUrl(video)
  50     const destPath = join(FILES_CACHE.VIDEO_CAPTIONS.DIRECTORY, videoCaption.getCaptionName())
  51
  52     await doRequestAndSaveToFile({ uri: remoteUrl }, destPath)
  53
  54     return { isOwned: false, path: destPath }
  55   }
  56 }
  57
  58 export {
  59   VideosCaptionCache
  60 }