8 files changed, 271 insertions, 0 deletions

diff --git a/server/helpers/middlewares/accounts.ts b/server/helpers/middlewares/accounts.ts
new file mode 100644
index 000000000..791022b97
--- /dev/null
+++ b/server/helpers/middlewares/accounts.ts
@@ -0,0 +1,46 @@
+import { Response } from 'express'
+import { AccountModel } from '../../models/account/account'
+import * as Bluebird from 'bluebird'
+
+function doesAccountIdExist (id: number, res: Response, sendNotFound = true) {
+  const promise = AccountModel.load(id)
+
+  return doesAccountExist(promise, res, sendNotFound)
+}
+
+function doesLocalAccountNameExist (name: string, res: Response, sendNotFound = true) {
+  const promise = AccountModel.loadLocalByName(name)
+
+  return doesAccountExist(promise, res, sendNotFound)
+}
+
+function doesAccountNameWithHostExist (nameWithDomain: string, res: Response, sendNotFound = true) {
+  return doesAccountExist(AccountModel.loadByNameWithHost(nameWithDomain), res, sendNotFound)
+}
+
+async function doesAccountExist (p: Bluebird<AccountModel>, res: Response, sendNotFound: boolean) {
+  const account = await p
+
+  if (!account) {
+    if (sendNotFound === true) {
+      res.status(404)
+         .send({ error: 'Account not found' })
+         .end()
+    }
+
+    return false
+  }
+
+  res.locals.account = account
+
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesAccountIdExist,
+  doesLocalAccountNameExist,
+  doesAccountNameWithHostExist,
+  doesAccountExist
+}
diff --git a/server/helpers/middlewares/index.ts b/server/helpers/middlewares/index.ts
new file mode 100644
index 000000000..f91aeaa12
--- /dev/null
+++ b/server/helpers/middlewares/index.ts
@@ -0,0 +1,7 @@
+export * from './accounts'
+export * from './video-abuses'
+export * from './video-blacklists'
+export * from './video-captions'
+export * from './video-channels'
+export * from './video-playlists'
+export * from './videos'
diff --git a/server/helpers/middlewares/video-abuses.ts b/server/helpers/middlewares/video-abuses.ts
new file mode 100644
index 000000000..b23f1f021
--- /dev/null
+++ b/server/helpers/middlewares/video-abuses.ts
@@ -0,0 +1,41 @@
+import * as express from 'express'
+import { VideoChannelModel } from '../../models/video/video-channel'
+
+async function doesLocalVideoChannelNameExist (name: string, res: express.Response) {
+  const videoChannel = await VideoChannelModel.loadLocalByNameAndPopulateAccount(name)
+
+  return processVideoChannelExist(videoChannel, res)
+}
+
+async function doesVideoChannelIdExist (id: number, res: express.Response) {
+  const videoChannel = await VideoChannelModel.loadAndPopulateAccount(+id)
+
+  return processVideoChannelExist(videoChannel, res)
+}
+
+async function doesVideoChannelNameWithHostExist (nameWithDomain: string, res: express.Response) {
+  const videoChannel = await VideoChannelModel.loadByNameWithHostAndPopulateAccount(nameWithDomain)
+
+  return processVideoChannelExist(videoChannel, res)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesLocalVideoChannelNameExist,
+  doesVideoChannelIdExist,
+  doesVideoChannelNameWithHostExist
+}
+
+function processVideoChannelExist (videoChannel: VideoChannelModel, res: express.Response) {
+  if (!videoChannel) {
+    res.status(404)
+       .json({ error: 'Video channel not found' })
+       .end()
+
+    return false
+  }
+
+  res.locals.videoChannel = videoChannel
+  return true
+}
diff --git a/server/helpers/middlewares/video-blacklists.ts b/server/helpers/middlewares/video-blacklists.ts
new file mode 100644
index 000000000..c79420a0c
--- /dev/null
+++ b/server/helpers/middlewares/video-blacklists.ts
@@ -0,0 +1,23 @@
+import { Response } from 'express'
+import { VideoBlacklistModel } from '../../models/video/video-blacklist'
+
+async function doesVideoBlacklistExist (videoId: number, res: Response) {
+  const videoBlacklist = await VideoBlacklistModel.loadByVideoId(videoId)
+
+  if (videoBlacklist === null) {
+    res.status(404)
+       .json({ error: 'Blacklisted video not found' })
+       .end()
+
+    return false
+  }
+
+  res.locals.videoBlacklist = videoBlacklist
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesVideoBlacklistExist
+}
diff --git a/server/helpers/middlewares/video-captions.ts b/server/helpers/middlewares/video-captions.ts
new file mode 100644
index 000000000..dc3d0144b
--- /dev/null
+++ b/server/helpers/middlewares/video-captions.ts
@@ -0,0 +1,24 @@
+import { VideoModel } from '../../models/video/video'
+import { Response } from 'express'
+import { VideoCaptionModel } from '../../models/video/video-caption'
+
+async function doesVideoCaptionExist (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 {
+  doesVideoCaptionExist
+}
diff --git a/server/helpers/middlewares/video-channels.ts b/server/helpers/middlewares/video-channels.ts
new file mode 100644
index 000000000..1b573ca37
--- /dev/null
+++ b/server/helpers/middlewares/video-channels.ts
@@ -0,0 +1,23 @@
+import { Response } from 'express'
+import { VideoAbuseModel } from '../../models/video/video-abuse'
+
+async function doesVideoAbuseExist (abuseId: number, videoId: number, res: Response) {
+  const videoAbuse = await VideoAbuseModel.loadByIdAndVideoId(abuseId, videoId)
+
+  if (videoAbuse === null) {
+    res.status(404)
+       .json({ error: 'Video abuse not found' })
+       .end()
+
+    return false
+  }
+
+  res.locals.videoAbuse = videoAbuse
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesVideoAbuseExist
+}
diff --git a/server/helpers/middlewares/video-playlists.ts b/server/helpers/middlewares/video-playlists.ts
new file mode 100644
index 000000000..735bf362f
--- /dev/null
+++ b/server/helpers/middlewares/video-playlists.ts
@@ -0,0 +1,25 @@
+import * as express from 'express'
+import { VideoPlaylistModel } from '../../models/video/video-playlist'
+
+async function doesVideoPlaylistExist (id: number | string, res: express.Response, fetchType: 'summary' | 'all' = 'summary') {
+  const videoPlaylist = fetchType === 'summary'
+    ? await VideoPlaylistModel.loadWithAccountAndChannelSummary(id, undefined)
+    : await VideoPlaylistModel.loadWithAccountAndChannel(id, undefined)
+
+  if (!videoPlaylist) {
+    res.status(404)
+       .json({ error: 'Video playlist not found' })
+       .end()
+
+    return false
+  }
+
+  res.locals.videoPlaylist = videoPlaylist
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesVideoPlaylistExist
+}
diff --git a/server/helpers/middlewares/videos.ts b/server/helpers/middlewares/videos.ts
new file mode 100644
index 000000000..ceb1058ec
--- /dev/null
+++ b/server/helpers/middlewares/videos.ts
@@ -0,0 +1,82 @@
+import { Response } from 'express'
+import { fetchVideo, VideoFetchType } from '../video'
+import { UserModel } from '../../models/account/user'
+import { UserRight } from '../../../shared/models/users'
+import { VideoChannelModel } from '../../models/video/video-channel'
+import { VideoModel } from '../../models/video/video'
+
+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.status(404)
+       .json({ error: 'Video not found' })
+       .end()
+
+    return false
+  }
+
+  if (fetchType !== 'none') res.locals.video = video
+  return true
+}
+
+async function doesVideoChannelOfAccountExist (channelId: number, user: UserModel, res: Response) {
+  if (user.hasRight(UserRight.UPDATE_ANY_VIDEO) === true) {
+    const videoChannel = await VideoChannelModel.loadAndPopulateAccount(channelId)
+    if (videoChannel === null) {
+      res.status(400)
+         .json({ error: 'Unknown video `video channel` on this instance.' })
+         .end()
+
+      return false
+    }
+
+    res.locals.videoChannel = videoChannel
+    return true
+  }
+
+  const videoChannel = await VideoChannelModel.loadByIdAndAccount(channelId, user.Account.id)
+  if (videoChannel === null) {
+    res.status(400)
+       .json({ error: 'Unknown video `video channel` for this account.' })
+       .end()
+
+    return false
+  }
+
+  res.locals.videoChannel = videoChannel
+  return true
+}
+
+function checkUserCanManageVideo (user: UserModel, video: VideoModel, right: UserRight, res: Response) {
+  // Retrieve the user who did the request
+  if (video.isOwned() === false) {
+    res.status(403)
+       .json({ error: 'Cannot manage a video of another server.' })
+       .end()
+    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.status(403)
+       .json({ error: 'Cannot manage a video of another user.' })
+       .end()
+    return false
+  }
+
+  return true
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  doesVideoChannelOfAccountExist,
+  doesVideoExist,
+  checkUserCanManageVideo
+}