server/lib/files-cache/abstract-video-static-file-cache.ts

   1 import { remove } from 'fs-extra'
   2 import { logger } from '../../helpers/logger'
   3 import memoizee from 'memoizee'
   4
   5 type GetFilePathResult = { isOwned: boolean, path: string, downloadName?: string } | undefined
   6
   7 export abstract class AbstractVideoStaticFileCache <T> {
   8
   9   getFilePath: (params: T) => Promise<GetFilePathResult>
  10
  11   abstract getFilePathImpl (params: T): Promise<GetFilePathResult>
  12
  13   // Load and save the remote file, then return the local path from filesystem
  14   protected abstract loadRemoteFile (key: string): Promise<GetFilePathResult>
  15
  16   init (max: number, maxAge: number) {
  17     this.getFilePath = memoizee(this.getFilePathImpl, {
  18       maxAge,
  19       max,
  20       promise: true,
  21       dispose: (result?: GetFilePathResult) => {
  22         if (result && result.isOwned !== true) {
  23           remove(result.path)
  24             .then(() => logger.debug('%s removed from %s', result.path, this.constructor.name))
  25             .catch(err => logger.error('Cannot remove %s from cache %s.', result.path, this.constructor.name, { err }))
  26         }
  27       }
  28     })
  29   }
  30 }