server/controllers/api/videos/rate.ts

   1 import * as express from 'express'
   2 import { UserVideoRateUpdate } from '../../../../shared'
   3 import { retryTransactionWrapper } from '../../../helpers/database-utils'
   4 import { logger } from '../../../helpers/logger'
   5 import { sequelizeTypescript, VIDEO_RATE_TYPES } from '../../../initializers'
   6 import { sendVideoRateChange } from '../../../lib/activitypub'
   7 import { asyncMiddleware, authenticate, videoRateValidator } from '../../../middlewares'
   8 import { AccountModel } from '../../../models/account/account'
   9 import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
  10 import { VideoModel } from '../../../models/video/video'
  11
  12 const rateVideoRouter = express.Router()
  13
  14 rateVideoRouter.put('/:id/rate',
  15   authenticate,
  16   asyncMiddleware(videoRateValidator),
  17   asyncMiddleware(rateVideoRetryWrapper)
  18 )
  19
  20 // ---------------------------------------------------------------------------
  21
  22 export {
  23   rateVideoRouter
  24 }
  25
  26 // ---------------------------------------------------------------------------
  27
  28 async function rateVideoRetryWrapper (req: express.Request, res: express.Response, next: express.NextFunction) {
  29   const options = {
  30     arguments: [ req, res ],
  31     errorMessage: 'Cannot update the user video rate.'
  32   }
  33
  34   await retryTransactionWrapper(rateVideo, options)
  35
  36   return res.type('json').status(204).end()
  37 }
  38
  39 async function rateVideo (req: express.Request, res: express.Response) {
  40   const body: UserVideoRateUpdate = req.body
  41   const rateType = body.rating
  42   const videoInstance: VideoModel = res.locals.video
  43   const accountInstance: AccountModel = res.locals.oauth.token.User.Account
  44
  45   await sequelizeTypescript.transaction(async t => {
  46     const sequelizeOptions = { transaction: t }
  47     const previousRate = await AccountVideoRateModel.load(accountInstance.id, videoInstance.id, t)
  48
  49     let likesToIncrement = 0
  50     let dislikesToIncrement = 0
  51
  52     if (rateType === VIDEO_RATE_TYPES.LIKE) likesToIncrement++
  53     else if (rateType === VIDEO_RATE_TYPES.DISLIKE) dislikesToIncrement++
  54
  55     // There was a previous rate, update it
  56     if (previousRate) {
  57       // We will remove the previous rate, so we will need to update the video count attribute
  58       if (previousRate.type === VIDEO_RATE_TYPES.LIKE) likesToIncrement--
  59       else if (previousRate.type === VIDEO_RATE_TYPES.DISLIKE) dislikesToIncrement--
  60
  61       if (rateType === 'none') { // Destroy previous rate
  62         await previousRate.destroy({ transaction: t })
  63       } else { // Update previous rate
  64         previousRate.type = rateType
  65         await previousRate.save({ transaction: t })
  66       }
  67     } else if (rateType !== 'none') { // There was not a previous rate, insert a new one if there is a rate
  68       const query = {
  69         accountId: accountInstance.id,
  70         videoId: videoInstance.id,
  71         type: rateType
  72       }
  73
  74       await AccountVideoRateModel.create(query, sequelizeOptions)
  75     }
  76
  77     const incrementQuery = {
  78       likes: likesToIncrement,
  79       dislikes: dislikesToIncrement
  80     }
  81
  82     // Even if we do not own the video we increment the attributes
  83     // It is useful for the user to have a feedback
  84     await videoInstance.increment(incrementQuery, sequelizeOptions)
  85
  86     await sendVideoRateChange(accountInstance, videoInstance, likesToIncrement, dislikesToIncrement, t)
  87   })
  88
  89   logger.info('Account video rate for video %s of account %s updated.', videoInstance.name, accountInstance.name)
  90 }