1 files changed, 125 insertions, 0 deletions

diff --git a/server/middlewares/validators/shared/videos.ts b/server/middlewares/validators/shared/videos.ts
new file mode 100644
index 000000000..a6dad4374
--- /dev/null
+++ b/server/middlewares/validators/shared/videos.ts
@@ -0,0 +1,125 @@
+import { Response } from 'express'
+import { fetchVideo, VideoFetchType } from '@server/lib/model-loaders'
+import { VideoChannelModel } from '@server/models/video/video-channel'
+import { VideoFileModel } from '@server/models/video/video-file'
+import {
+  MUser,
+  MUserAccountId,
+  MVideoAccountLight,
+  MVideoFullLight,
+  MVideoIdThumbnail,
+  MVideoImmutable,
+  MVideoThumbnail,
+  MVideoWithRights
+} from '@server/types/models'
+import { HttpStatusCode } from '@shared/core-utils'
+import { UserRight } from '@shared/models'
+
+async function doesVideoExist (id: number | string, res: Response, fetchType: VideoFetchType = 'all') {
+  const userId = res.locals.oauth ? res.locals.oauth.token.User.id : undefined
+
+  const video = await fetchVideo(id, fetchType, userId)
+
+  if (video === null) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'Video not found'
+    })
+    return false
+  }
+
+  switch (fetchType) {
+    case 'all':
+      res.locals.videoAll = video as MVideoFullLight
+      break
+
+    case 'only-immutable-attributes':
+      res.locals.onlyImmutableVideo = video as MVideoImmutable
+      break
+
+    case 'id':
+      res.locals.videoId = video as MVideoIdThumbnail
+      break
+
+    case 'only-video':
+      res.locals.onlyVideo = video as MVideoThumbnail
+      break
+
+    case 'only-video-with-rights':
+      res.locals.onlyVideoWithRights = video as MVideoWithRights
+      break
+  }
+
+  return true
+}
+
+async function doesVideoFileOfVideoExist (id: number, videoIdOrUUID: number | string, res: Response) {
+  if (!await VideoFileModel.doesVideoExistForVideoFile(id, videoIdOrUUID)) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'VideoFile matching Video not found'
+    })
+    return false
+  }
+
+  return true
+}
+
+async function doesVideoChannelOfAccountExist (channelId: number, user: MUserAccountId, res: Response) {
+  const videoChannel = await VideoChannelModel.loadAndPopulateAccount(channelId)
+
+  if (videoChannel === null) {
+    res.fail({ message: 'Unknown video "video channel" for this instance.' })
+    return false
+  }
+
+  // Don't check account id if the user can update any video
+  if (user.hasRight(UserRight.UPDATE_ANY_VIDEO) === true) {
+    res.locals.videoChannel = videoChannel
+    return true
+  }
+
+  if (videoChannel.Account.id !== user.Account.id) {
+    res.fail({
+      message: 'Unknown video "video channel" for this account.'
+    })
+    return false
+  }
+
+  res.locals.videoChannel = videoChannel
+  return true
+}
+
+function checkUserCanManageVideo (user: MUser, video: MVideoAccountLight, right: UserRight, res: Response, onlyOwned = true) {
+  // Retrieve the user who did the request
+  if (onlyOwned && video.isOwned() === false) {
+    res.fail({
+      status: HttpStatusCode.FORBIDDEN_403,
+      message: 'Cannot manage a video of another server.'
+    })
+    return false
+  }
+
+  // Check if the user can delete the video
+  // The user can delete it if he has the right
+  // Or if s/he is the video's account
+  const account = video.VideoChannel.Account
+  if (user.hasRight(right) === false && account.userId !== user.id) {
+    res.fail({
+      status: HttpStatusCode.FORBIDDEN_403,
+      message: 'Cannot manage a video of another user.'
+    })
+    return false
+  }
+
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesVideoChannelOfAccountExist,
+  doesVideoExist,
+  doesVideoFileOfVideoExist,
+  checkUserCanManageVideo
+}