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

   1 import { join } from 'path'
   2 import { FILES_CACHE } from '../../initializers/constants'
   3 import { VideoModel } from '../../models/video/video'
   4 import { AbstractVideoStaticFileCache } from './abstract-video-static-file-cache'
   5 import { doRequestAndSaveToFile } from '@server/helpers/requests'
   6 import { ThumbnailModel } from '@server/models/video/thumbnail'
   7 import { ThumbnailType } from '@shared/models'
   8 import { logger } from '@server/helpers/logger'
   9
  10 class VideosPreviewCache extends AbstractVideoStaticFileCache <string> {
  11
  12   private static instance: VideosPreviewCache
  13
  14   private constructor () {
  15     super()
  16   }
  17
  18   static get Instance () {
  19     return this.instance || (this.instance = new this())
  20   }
  21
  22   async getFilePathImpl (filename: string) {
  23     const thumbnail = await ThumbnailModel.loadWithVideoByFilename(filename, ThumbnailType.PREVIEW)
  24     if (!thumbnail) return undefined
  25
  26     if (thumbnail.Video.isOwned()) return { isOwned: true, path: thumbnail.getPath() }
  27
  28     return this.loadRemoteFile(thumbnail.Video.uuid)
  29   }
  30
  31   // Key is the video UUID
  32   protected async loadRemoteFile (key: string) {
  33     const video = await VideoModel.loadFull(key)
  34     if (!video) return undefined
  35
  36     if (video.isOwned()) throw new Error('Cannot load remote preview of owned video.')
  37
  38     const preview = video.getPreview()
  39     const destPath = join(FILES_CACHE.PREVIEWS.DIRECTORY, preview.filename)
  40     const remoteUrl = preview.getOriginFileUrl(video)
  41
  42     try {
  43       await doRequestAndSaveToFile(remoteUrl, destPath)
  44
  45       logger.debug('Fetched remote preview %s to %s.', remoteUrl, destPath)
  46
  47       return { isOwned: false, path: destPath }
  48     } catch (err) {
  49       logger.info('Cannot fetch remote preview file %s.', remoteUrl, { err })
  50
  51       return undefined
  52     }
  53   }
  54 }
  55
  56 export {
  57   VideosPreviewCache
  58 }