From 72c7248b6fdcdb2175e726ff51b42e7555f2bd84 Mon Sep 17 00:00:00 2001
From: Chocobozzz <florian.bigard@gmail.com>
Date: Tue, 24 Oct 2017 19:41:09 +0200
Subject: Add video channels

---
 server/middlewares/validators/video-channels.ts | 142 ++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 server/middlewares/validators/video-channels.ts

(limited to 'server/middlewares/validators/video-channels.ts')

diff --git a/server/middlewares/validators/video-channels.ts b/server/middlewares/validators/video-channels.ts
new file mode 100644
index 000000000..979fbd34a
--- /dev/null
+++ b/server/middlewares/validators/video-channels.ts
@@ -0,0 +1,142 @@
+import { body, param } from 'express-validator/check'
+import * as express from 'express'
+
+import { checkErrors } from './utils'
+import { database as db } from '../../initializers'
+import {
+  logger,
+  isIdOrUUIDValid,
+  isVideoChannelDescriptionValid,
+  isVideoChannelNameValid,
+  checkVideoChannelExists,
+  checkVideoAuthorExists
+} from '../../helpers'
+
+const listVideoAuthorChannelsValidator = [
+  param('authorId').custom(isIdOrUUIDValid).withMessage('Should have a valid author id'),
+
+  (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking listVideoAuthorChannelsValidator parameters', { parameters: req.body })
+
+    checkErrors(req, res, () => {
+      checkVideoAuthorExists(req.params.authorId, res, next)
+    })
+  }
+]
+
+const videoChannelsAddValidator = [
+  body('name').custom(isVideoChannelNameValid).withMessage('Should have a valid name'),
+  body('description').custom(isVideoChannelDescriptionValid).withMessage('Should have a valid description'),
+
+  (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking videoChannelsAdd parameters', { parameters: req.body })
+
+    checkErrors(req, res, next)
+  }
+]
+
+const videoChannelsUpdateValidator = [
+  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
+  body('name').optional().custom(isVideoChannelNameValid).withMessage('Should have a valid name'),
+  body('description').optional().custom(isVideoChannelDescriptionValid).withMessage('Should have a valid description'),
+
+  (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking videoChannelsUpdate parameters', { parameters: req.body })
+
+    checkErrors(req, res, () => {
+      checkVideoChannelExists(req.params.id, res, () => {
+        // We need to make additional checks
+        if (res.locals.videoChannel.isOwned() === false) {
+          return res.status(403)
+            .json({ error: 'Cannot update video channel of another pod' })
+            .end()
+        }
+
+        if (res.locals.videoChannel.Author.userId !== res.locals.oauth.token.User.id) {
+          return res.status(403)
+            .json({ error: 'Cannot update video channel of another user' })
+            .end()
+        }
+
+        next()
+      })
+    })
+  }
+]
+
+const videoChannelsRemoveValidator = [
+  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
+
+  (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking videoChannelsRemove parameters', { parameters: req.params })
+
+    checkErrors(req, res, () => {
+      checkVideoChannelExists(req.params.id, res, () => {
+        // Check if the user who did the request is able to delete the video
+        checkUserCanDeleteVideoChannel(res, () => {
+          checkVideoChannelIsNotTheLastOne(res, next)
+        })
+      })
+    })
+  }
+]
+
+const videoChannelGetValidator = [
+  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
+
+  (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking videoChannelsGet parameters', { parameters: req.params })
+
+    checkErrors(req, res, () => {
+      checkVideoChannelExists(req.params.id, res, next)
+    })
+  }
+]
+
+// ---------------------------------------------------------------------------
+
+export {
+  listVideoAuthorChannelsValidator,
+  videoChannelsAddValidator,
+  videoChannelsUpdateValidator,
+  videoChannelsRemoveValidator,
+  videoChannelGetValidator
+}
+
+// ---------------------------------------------------------------------------
+
+function checkUserCanDeleteVideoChannel (res: express.Response, callback: () => void) {
+  const user = res.locals.oauth.token.User
+
+  // Retrieve the user who did the request
+  if (res.locals.videoChannel.isOwned() === false) {
+    return res.status(403)
+              .json({ error: 'Cannot remove video channel of another pod.' })
+              .end()
+  }
+
+  // Check if the user can delete the video channel
+  // The user can delete it if s/he is an admin
+  // Or if s/he is the video channel's author
+  if (user.isAdmin() === false && res.locals.videoChannel.Author.userId !== user.id) {
+    return res.status(403)
+              .json({ error: 'Cannot remove video channel of another user' })
+              .end()
+  }
+
+  // If we reach this comment, we can delete the video
+  callback()
+}
+
+function checkVideoChannelIsNotTheLastOne (res: express.Response, callback: () => void) {
+  db.VideoChannel.countByAuthor(res.locals.oauth.token.User.Author.id)
+    .then(count => {
+      if (count <= 1) {
+        return res.status(409)
+          .json({ error: 'Cannot remove the last channel of this user' })
+          .end()
+      }
+
+      callback()
+    })
+}
-- 
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