server/lib/activitypub/process/process-like.ts

   1 import { ActivityLike } from '../../../../shared/models/activitypub/activity'
   2 import { retryTransactionWrapper } from '../../../helpers/database-utils'
   3 import { database as db } from '../../../initializers'
   4 import { AccountInstance } from '../../../models/account/account-interface'
   5 import { getOrCreateAccountAndServer } from '../account'
   6 import { forwardActivity } from '../send/misc'
   7
   8 async function processLikeActivity (activity: ActivityLike) {
   9   const account = await getOrCreateAccountAndServer(activity.actor)
  10
  11   return processLikeVideo(account, activity)
  12 }
  13
  14 // ---------------------------------------------------------------------------
  15
  16 export {
  17   processLikeActivity
  18 }
  19
  20 // ---------------------------------------------------------------------------
  21
  22 async function processLikeVideo (byAccount: AccountInstance, activity: ActivityLike) {
  23   const options = {
  24     arguments: [ byAccount, activity ],
  25     errorMessage: 'Cannot like the video with many retries.'
  26   }
  27
  28   return retryTransactionWrapper(createVideoLike, options)
  29 }
  30
  31 function createVideoLike (byAccount: AccountInstance, activity: ActivityLike) {
  32   const videoUrl = activity.object
  33
  34   return db.sequelize.transaction(async t => {
  35     const video = await db.Video.loadByUrlAndPopulateAccount(videoUrl)
  36
  37     if (!video) throw new Error('Unknown video ' + videoUrl)
  38
  39     const rate = {
  40       type: 'like' as 'like',
  41       videoId: video.id,
  42       accountId: byAccount.id
  43     }
  44     const [ , created ] = await db.AccountVideoRate.findOrCreate({
  45       where: rate,
  46       defaults: rate,
  47       transaction: t
  48     })
  49     if (created === true) await video.increment('likes', { transaction: t })
  50
  51     if (video.isOwned() && created === true) {
  52       // Don't resend the activity to the sender
  53       const exceptions = [ byAccount ]
  54       await forwardActivity(activity, t, exceptions)
  55     }
  56   })
  57 }