Implement captions/subtitles

server/helpers/custom-validators/video-captions.ts

@@ -0,0 +1,41 @@
+import { CONSTRAINTS_FIELDS, VIDEO_LANGUAGES } from '../../initializers'
+import { exists, isFileValid } from './misc'
+import { Response } from 'express'
+import { VideoModel } from '../../models/video/video'
+import { VideoCaptionModel } from '../../models/video/video-caption'
+
+function isVideoCaptionLanguageValid (value: any) {
+  return exists(value) && VIDEO_LANGUAGES[ value ] !== undefined
+}
+
+const videoCaptionTypes = CONSTRAINTS_FIELDS.VIDEO_CAPTIONS.CAPTION_FILE.EXTNAME
+                                          .map(v => v.replace('.', ''))
+                                          .join('|')
+const videoCaptionsTypesRegex = `text/(${videoCaptionTypes})`
+
+function isVideoCaptionFile (files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[], field: string) {
+  return isFileValid(files, videoCaptionsTypesRegex, field, CONSTRAINTS_FIELDS.VIDEO_CAPTIONS.CAPTION_FILE.FILE_SIZE.max)
+}
+
+async function isVideoCaptionExist (video: VideoModel, language: string, res: Response) {
+  const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(video.id, language)
+
+  if (!videoCaption) {
+    res.status(404)
+       .json({ error: 'Video caption not found' })
+       .end()
+
+    return false
+  }
+
+  res.locals.videoCaption = videoCaption
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  isVideoCaptionFile,
+  isVideoCaptionLanguageValid,
+  isVideoCaptionExist
+}