1 files changed, 181 insertions, 0 deletions

diff --git a/server/controllers/api/videos/rate.ts b/server/controllers/api/videos/rate.ts
new file mode 100644
index 000000000..21053792a
--- /dev/null
+++ b/server/controllers/api/videos/rate.ts
@@ -0,0 +1,181 @@
+import express = require('express')
+import { waterfall } from 'async'
+
+const db = require('../../../initializers/database')
+import {
+  logger,
+  retryTransactionWrapper,
+  startSerializableTransaction,
+  commitTransaction,
+  rollbackTransaction
+} from '../../../helpers'
+import {
+  VIDEO_RATE_TYPES,
+  REQUEST_VIDEO_EVENT_TYPES,
+  REQUEST_VIDEO_QADU_TYPES
+} from '../../../initializers'
+import {
+  addEventsToRemoteVideo,
+  quickAndDirtyUpdatesVideoToFriends
+} from '../../../lib'
+import {
+  authenticate,
+  videoRateValidator
+} from '../../../middlewares'
+
+const rateVideoRouter = express.Router()
+
+rateVideoRouter.put('/:id/rate',
+  authenticate,
+  videoRateValidator,
+  rateVideoRetryWrapper
+)
+
+// ---------------------------------------------------------------------------
+
+export {
+  rateVideoRouter
+}
+
+// ---------------------------------------------------------------------------
+
+function rateVideoRetryWrapper (req, res, next) {
+  const options = {
+    arguments: [ req, res ],
+    errorMessage: 'Cannot update the user video rate.'
+  }
+
+  retryTransactionWrapper(rateVideo, options, function (err) {
+    if (err) return next(err)
+
+    return res.type('json').status(204).end()
+  })
+}
+
+function rateVideo (req, res, finalCallback) {
+  const rateType = req.body.rating
+  const videoInstance = res.locals.video
+  const userInstance = res.locals.oauth.token.User
+
+  waterfall([
+    startSerializableTransaction,
+
+    function findPreviousRate (t, callback) {
+      db.UserVideoRate.load(userInstance.id, videoInstance.id, t, function (err, previousRate) {
+        return callback(err, t, previousRate)
+      })
+    },
+
+    function insertUserRateIntoDB (t, previousRate, callback) {
+      const options = { transaction: t }
+
+      let likesToIncrement = 0
+      let dislikesToIncrement = 0
+
+      if (rateType === VIDEO_RATE_TYPES.LIKE) likesToIncrement++
+      else if (rateType === VIDEO_RATE_TYPES.DISLIKE) dislikesToIncrement++
+
+      // There was a previous rate, update it
+      if (previousRate) {
+        // We will remove the previous rate, so we will need to remove it from the video attribute
+        if (previousRate.type === VIDEO_RATE_TYPES.LIKE) likesToIncrement--
+        else if (previousRate.type === VIDEO_RATE_TYPES.DISLIKE) dislikesToIncrement--
+
+        previousRate.type = rateType
+
+        previousRate.save(options).asCallback(function (err) {
+          return callback(err, t, likesToIncrement, dislikesToIncrement)
+        })
+      } else { // There was not a previous rate, insert a new one
+        const query = {
+          userId: userInstance.id,
+          videoId: videoInstance.id,
+          type: rateType
+        }
+
+        db.UserVideoRate.create(query, options).asCallback(function (err) {
+          return callback(err, t, likesToIncrement, dislikesToIncrement)
+        })
+      }
+    },
+
+    function updateVideoAttributeDB (t, likesToIncrement, dislikesToIncrement, callback) {
+      const options = { transaction: t }
+      const incrementQuery = {
+        likes: likesToIncrement,
+        dislikes: dislikesToIncrement
+      }
+
+      // Even if we do not own the video we increment the attributes
+      // It is usefull for the user to have a feedback
+      videoInstance.increment(incrementQuery, options).asCallback(function (err) {
+        return callback(err, t, likesToIncrement, dislikesToIncrement)
+      })
+    },
+
+    function sendEventsToFriendsIfNeeded (t, likesToIncrement, dislikesToIncrement, callback) {
+      // No need for an event type, we own the video
+      if (videoInstance.isOwned()) return callback(null, t, likesToIncrement, dislikesToIncrement)
+
+      const eventsParams = []
+
+      if (likesToIncrement !== 0) {
+        eventsParams.push({
+          videoId: videoInstance.id,
+          type: REQUEST_VIDEO_EVENT_TYPES.LIKES,
+          count: likesToIncrement
+        })
+      }
+
+      if (dislikesToIncrement !== 0) {
+        eventsParams.push({
+          videoId: videoInstance.id,
+          type: REQUEST_VIDEO_EVENT_TYPES.DISLIKES,
+          count: dislikesToIncrement
+        })
+      }
+
+      addEventsToRemoteVideo(eventsParams, t, function (err) {
+        return callback(err, t, likesToIncrement, dislikesToIncrement)
+      })
+    },
+
+    function sendQaduToFriendsIfNeeded (t, likesToIncrement, dislikesToIncrement, callback) {
+      // We do not own the video, there is no need to send a quick and dirty update to friends
+      // Our rate was already sent by the addEvent function
+      if (videoInstance.isOwned() === false) return callback(null, t)
+
+      const qadusParams = []
+
+      if (likesToIncrement !== 0) {
+        qadusParams.push({
+          videoId: videoInstance.id,
+          type: REQUEST_VIDEO_QADU_TYPES.LIKES
+        })
+      }
+
+      if (dislikesToIncrement !== 0) {
+        qadusParams.push({
+          videoId: videoInstance.id,
+          type: REQUEST_VIDEO_QADU_TYPES.DISLIKES
+        })
+      }
+
+      quickAndDirtyUpdatesVideoToFriends(qadusParams, t, function (err) {
+        return callback(err, t)
+      })
+    },
+
+    commitTransaction
+
+  ], function (err, t) {
+    if (err) {
+      // This is just a debug because we will retry the insert
+      logger.debug('Cannot add the user video rate.', { error: err })
+      return rollbackTransaction(err, t, finalCallback)
+    }
+
+    logger.info('User video rate for video %s of user %s updated.', videoInstance.name, userInstance.username)
+    return finalCallback(null)
+  })
+}