1 files changed, 61 insertions, 0 deletions

diff --git a/server/lib/files-cache/video-captions-simple-file-cache.ts b/server/lib/files-cache/video-captions-simple-file-cache.ts
new file mode 100644
index 000000000..cbeeff732
--- /dev/null
+++ b/server/lib/files-cache/video-captions-simple-file-cache.ts
@@ -0,0 +1,61 @@
+import { join } from 'path'
+import { logger } from '@server/helpers/logger'
+import { doRequestAndSaveToFile } from '@server/helpers/requests'
+import { CONFIG } from '../../initializers/config'
+import { FILES_CACHE } from '../../initializers/constants'
+import { VideoModel } from '../../models/video/video'
+import { VideoCaptionModel } from '../../models/video/video-caption'
+import { AbstractSimpleFileCache } from './shared/abstract-simple-file-cache'
+
+class VideoCaptionsSimpleFileCache extends AbstractSimpleFileCache <string> {
+
+  private static instance: VideoCaptionsSimpleFileCache
+
+  private constructor () {
+    super()
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+
+  async getFilePathImpl (filename: string) {
+    const videoCaption = await VideoCaptionModel.loadWithVideoByFilename(filename)
+    if (!videoCaption) return undefined
+
+    if (videoCaption.isOwned()) {
+      return { isOwned: true, path: join(CONFIG.STORAGE.CAPTIONS_DIR, videoCaption.filename) }
+    }
+
+    return this.loadRemoteFile(filename)
+  }
+
+  // Key is the caption filename
+  protected async loadRemoteFile (key: string) {
+    const videoCaption = await VideoCaptionModel.loadWithVideoByFilename(key)
+    if (!videoCaption) return undefined
+
+    if (videoCaption.isOwned()) throw new Error('Cannot load remote caption of owned video.')
+
+    // Used to fetch the path
+    const video = await VideoModel.loadFull(videoCaption.videoId)
+    if (!video) return undefined
+
+    const remoteUrl = videoCaption.getFileUrl(video)
+    const destPath = join(FILES_CACHE.VIDEO_CAPTIONS.DIRECTORY, videoCaption.filename)
+
+    try {
+      await doRequestAndSaveToFile(remoteUrl, destPath)
+
+      return { isOwned: false, path: destPath }
+    } catch (err) {
+      logger.info('Cannot fetch remote caption file %s.', remoteUrl, { err })
+
+      return undefined
+    }
+  }
+}
+
+export {
+  VideoCaptionsSimpleFileCache
+}