5 files changed, 120 insertions, 4 deletions

diff --git a/server/controllers/api/videos/import.ts b/server/controllers/api/videos/import.ts
index da0832258..fb9d73140 100644
--- a/server/controllers/api/videos/import.ts
+++ b/server/controllers/api/videos/import.ts
@@ -3,11 +3,13 @@ import * as magnetUtil from 'magnet-uri'
 import { auditLoggerFactory, getAuditIdFromRes, VideoImportAuditView } from '../../../helpers/audit-logger'
 import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate, videoImportAddValidator } from '../../../middlewares'
 import { MIMETYPES } from '../../../initializers/constants'
-import { getYoutubeDLInfo, YoutubeDLInfo } from '../../../helpers/youtube-dl'
+import { getYoutubeDLInfo, YoutubeDLInfo, getYoutubeDLSubs } from '../../../helpers/youtube-dl'
 import { createReqFiles } from '../../../helpers/express-utils'
 import { logger } from '../../../helpers/logger'
 import { VideoImportCreate, VideoImportState, VideoPrivacy, VideoState } from '../../../../shared'
 import { VideoModel } from '../../../models/video/video'
+import { VideoCaptionModel } from '../../../models/video/video-caption'
+import { moveAndProcessCaptionFile } from '../../../helpers/captions-utils'
 import { getVideoActivityPubUrl } from '../../../lib/activitypub'
 import { TagModel } from '../../../models/video/tag'
 import { VideoImportModel } from '../../../models/video/video-import'
@@ -28,6 +30,7 @@ import {
   MThumbnail,
   MUser,
   MVideoAccountDefault,
+  MVideoCaptionVideo,
   MVideoTag,
   MVideoThumbnailAccountDefault,
   MVideoWithBlacklistLight
@@ -136,6 +139,7 @@ async function addYoutubeDLImport (req: express.Request, res: express.Response)
   const targetUrl = body.targetUrl
   const user = res.locals.oauth.token.User
 
+  // Get video infos
   let youtubeDLInfo: YoutubeDLInfo
   try {
     youtubeDLInfo = await getYoutubeDLInfo(targetUrl)
@@ -168,6 +172,30 @@ async function addYoutubeDLImport (req: express.Request, res: express.Response)
     user
   })
 
+  // Get video subtitles
+  try {
+    const subtitles = await getYoutubeDLSubs(targetUrl)
+
+    logger.info('Will create %s subtitles from youtube import %s.', subtitles.length, targetUrl)
+
+    for (const subtitle of subtitles) {
+      const videoCaption = new VideoCaptionModel({
+        videoId: video.id,
+        language: subtitle.language
+      }) as MVideoCaptionVideo
+      videoCaption.Video = video
+
+      // Move physical file
+      await moveAndProcessCaptionFile(subtitle, videoCaption)
+
+      await sequelizeTypescript.transaction(async t => {
+        await VideoCaptionModel.insertOrReplaceLanguage(video.id, subtitle.language, null, t)
+      })
+    }
+  } catch (err) {
+    logger.warn('Cannot get video subtitles.', { err })
+  }
+
   // Create job to import the video
   const payload = {
     type: 'youtube-dl' as 'youtube-dl',
diff --git a/server/helpers/youtube-dl.ts b/server/helpers/youtube-dl.ts
index 07c85797a..6d2e6f6d1 100644
--- a/server/helpers/youtube-dl.ts
+++ b/server/helpers/youtube-dl.ts
@@ -20,6 +20,12 @@ export type YoutubeDLInfo = {
   originallyPublishedAt?: Date
 }
 
+export type YoutubeDLSubs = {
+  language: string
+  filename: string
+  path: string
+}[]
+
 const processOptions = {
   maxBuffer: 1024 * 1024 * 10 // 10MB
 }
@@ -45,6 +51,40 @@ function getYoutubeDLInfo (url: string, opts?: string[]): Promise<YoutubeDLInfo>
   })
 }
 
+function getYoutubeDLSubs (url: string, opts?: object): Promise<YoutubeDLSubs> {
+  return new Promise<YoutubeDLSubs>((res, rej) => {
+    const cwd = CONFIG.STORAGE.TMP_DIR
+    const options = opts || { all: true, format: 'vtt', cwd }
+
+    safeGetYoutubeDL()
+      .then(youtubeDL => {
+        youtubeDL.getSubs(url, options, (err, files) => {
+          if (err) return rej(err)
+
+          logger.debug('Get subtitles from youtube dl.', { url, files })
+
+          const subtitles = files.reduce((acc, filename) => {
+            const matched = filename.match(/\.([a-z]{2})\.(vtt|ttml)/i)
+
+            if (matched[1]) {
+              return [
+                ...acc,
+                {
+                  language: matched[1],
+                  path: join(cwd, filename),
+                  filename
+                }
+              ]
+            }
+          }, [])
+
+          return res(subtitles)
+        })
+      })
+      .catch(err => rej(err))
+  })
+}
+
 function downloadYoutubeDLVideo (url: string, extension: string, timeout: number) {
   const path = generateVideoImportTmpPath(url, extension)
   let timer
@@ -185,6 +225,7 @@ function buildOriginallyPublishedAt (obj: any) {
 export {
   updateYoutubeDLBinary,
   downloadYoutubeDLVideo,
+  getYoutubeDLSubs,
   getYoutubeDLInfo,
   safeGetYoutubeDL,
   buildOriginallyPublishedAt
diff --git a/server/lib/activitypub/actor.ts b/server/lib/activitypub/actor.ts
index c3598b75b..8132ac135 100644
--- a/server/lib/activitypub/actor.ts
+++ b/server/lib/activitypub/actor.ts
@@ -117,7 +117,7 @@ async function getOrCreateActorAndServerAndModel (
   if (actor.VideoChannel) (actor as MActorAccountChannelIdActor).VideoChannel.Actor = actor
 
   const { actor: actorRefreshed, refreshed } = await retryTransactionWrapper(refreshActorIfNeeded, actor, fetchType)
-  if (!actorRefreshed) throw new Error('Actor ' + actorRefreshed.url + ' does not exist anymore.')
+  if (!actorRefreshed) throw new Error('Actor ' + actor.url + ' does not exist anymore.')
 
   if ((created === true || refreshed === true) && updateCollections === true) {
     const payload = { uri: actor.outboxUrl, type: 'activity' as 'activity' }
diff --git a/server/models/video/video-import.ts b/server/models/video/video-import.ts
index af5314ce9..fbe0ee0a7 100644
--- a/server/models/video/video-import.ts
+++ b/server/models/video/video-import.ts
@@ -129,6 +129,7 @@ export class VideoImportModel extends Model<VideoImportModel> {
       distinct: true,
       include: [
         {
+          attributes: [ 'id' ],
           model: UserModel.unscoped(), // FIXME: Without this, sequelize try to COUNT(DISTINCT(*)) which is an invalid SQL query
           required: true
         }
diff --git a/server/tests/api/videos/video-imports.ts b/server/tests/api/videos/video-imports.ts
index a67e528c6..8e179b825 100644
--- a/server/tests/api/videos/video-imports.ts
+++ b/server/tests/api/videos/video-imports.ts
@@ -2,7 +2,7 @@
 
 import * as chai from 'chai'
 import 'mocha'
-import { VideoDetails, VideoImport, VideoPrivacy } from '../../../../shared/models/videos'
+import { VideoDetails, VideoImport, VideoPrivacy, VideoCaption } from '../../../../shared/models/videos'
 import {
   cleanupTests,
   doubleFollow,
@@ -11,6 +11,8 @@ import {
   getMyVideos,
   getVideo,
   getVideosList,
+  listVideoCaptions,
+  testCaptionFile,
   immutableAssign,
   ServerInfo,
   setAccessTokensToServers
@@ -60,11 +62,14 @@ describe('Test video imports', function () {
 
     expect(videoTorrent.name).to.contain('你好 世界 720p.mp4')
     expect(videoMagnet.name).to.contain('super peertube2 video')
+
+    const resCaptions = await listVideoCaptions(url, idHttp)
+    expect(resCaptions.body.total).to.equal(2)
   }
 
   async function checkVideoServer2 (url: string, id: number | string) {
     const res = await getVideo(url, id)
-    const video = res.body
+    const video: VideoDetails = res.body
 
     expect(video.name).to.equal('my super name')
     expect(video.category.label).to.equal('Entertainment')
@@ -75,6 +80,9 @@ describe('Test video imports', function () {
     expect(video.tags).to.deep.equal([ 'supertag1', 'supertag2' ])
 
     expect(video.files).to.have.lengthOf(1)
+
+    const resCaptions = await listVideoCaptions(url, id)
+    expect(resCaptions.body.total).to.equal(2)
   }
 
   before(async function () {
@@ -110,6 +118,44 @@ describe('Test video imports', function () {
       const attributes = immutableAssign(baseAttributes, { targetUrl: getYoutubeVideoUrl() })
       const res = await importVideo(servers[0].url, servers[0].accessToken, attributes)
       expect(res.body.video.name).to.equal('small video - youtube')
+
+      const resCaptions = await listVideoCaptions(servers[0].url, res.body.video.id)
+      const videoCaptions: VideoCaption[] = resCaptions.body.data
+      expect(videoCaptions).to.have.lengthOf(2)
+
+      const enCaption = videoCaptions.find(caption => caption.language.id === 'en')
+      expect(enCaption).to.exist
+      expect(enCaption.language.label).to.equal('English')
+      expect(enCaption.captionPath).to.equal(`/static/video-captions/${res.body.video.uuid}-en.vtt`)
+      await testCaptionFile(servers[0].url, enCaption.captionPath, `WEBVTT
+Kind: captions
+Language: en
+
+00:00:01.600 --> 00:00:04.200
+English (US)
+
+00:00:05.900 --> 00:00:07.999
+This is a subtitle in American English
+
+00:00:10.000 --> 00:00:14.000
+Adding subtitles is very easy to do`)
+
+      const frCaption = videoCaptions.find(caption => caption.language.id === 'fr')
+      expect(frCaption).to.exist
+      expect(frCaption.language.label).to.equal('French')
+      expect(frCaption.captionPath).to.equal(`/static/video-captions/${res.body.video.uuid}-fr.vtt`)
+      await testCaptionFile(servers[0].url, frCaption.captionPath, `WEBVTT
+Kind: captions
+Language: fr
+
+00:00:01.600 --> 00:00:04.200
+Français (FR)
+
+00:00:05.900 --> 00:00:07.999
+C'est un sous-titre français
+
+00:00:10.000 --> 00:00:14.000
+Ajouter un sous-titre est vraiment facile`)
     }
 
     {