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
   7 class VideosPreviewCache extends AbstractVideoStaticFileCache <string> {
   8
   9   private static instance: VideosPreviewCache
  10
  11   private constructor () {
  12     super()
  13   }
  14
  15   static get Instance () {
  16     return this.instance || (this.instance = new this())
  17   }
  18
  19   async getFilePathImpl (videoUUID: string) {
  20     const video = await VideoModel.loadByUUID(videoUUID)
  21     if (!video) return undefined
  22
  23     if (video.isOwned()) return { isOwned: true, path: video.getPreview().getPath() }
  24
  25     return this.loadRemoteFile(videoUUID)
  26   }
  27
  28   protected async loadRemoteFile (key: string) {
  29     const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(key)
  30     if (!video) return undefined
  31
  32     if (video.isOwned()) throw new Error('Cannot load remote preview of owned video.')
  33
  34     const preview = video.getPreview()
  35     const destPath = join(FILES_CACHE.PREVIEWS.DIRECTORY, preview.filename)
  36
  37     const remoteUrl = preview.getFileUrl(video)
  38     await doRequestAndSaveToFile({ uri: remoteUrl }, destPath)
  39
  40     return { isOwned: false, path: destPath }
  41   }
  42 }
  43
  44 export {
  45   VideosPreviewCache
  46 }