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

   1 import { ActivityAnnounce, ActivityFollow, ActivityLike, ActivityUndo } from '../../../../shared/models/activitypub'
   2 import { DislikeObject } from '../../../../shared/models/activitypub/objects'
   3 import { getActorUrl } from '../../../helpers/activitypub'
   4 import { retryTransactionWrapper } from '../../../helpers/database-utils'
   5 import { logger } from '../../../helpers/logger'
   6 import { sequelizeTypescript } from '../../../initializers'
   7 import { AccountModel } from '../../../models/account/account'
   8 import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
   9 import { ActorModel } from '../../../models/activitypub/actor'
  10 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
  11 import { forwardVideoRelatedActivity } from '../send/utils'
  12 import { getOrCreateAccountAndVideoAndChannel } from '../videos'
  13 import { VideoShareModel } from '../../../models/video/video-share'
  14
  15 async function processUndoActivity (activity: ActivityUndo) {
  16   const activityToUndo = activity.object
  17
  18   const actorUrl = getActorUrl(activity.actor)
  19
  20   if (activityToUndo.type === 'Like') {
  21     return retryTransactionWrapper(processUndoLike, actorUrl, activity)
  22   } else if (activityToUndo.type === 'Create' && activityToUndo.object.type === 'Dislike') {
  23     return retryTransactionWrapper(processUndoDislike, actorUrl, activity)
  24   } else if (activityToUndo.type === 'Follow') {
  25     return retryTransactionWrapper(processUndoFollow, actorUrl, activityToUndo)
  26   } else if (activityToUndo.type === 'Announce') {
  27     return retryTransactionWrapper(processUndoAnnounce, actorUrl, activityToUndo)
  28   }
  29
  30   logger.warn('Unknown activity object type %s -> %s when undo activity.', activityToUndo.type, { activity: activity.id })
  31
  32   return undefined
  33 }
  34
  35 // ---------------------------------------------------------------------------
  36
  37 export {
  38   processUndoActivity
  39 }
  40
  41 // ---------------------------------------------------------------------------
  42
  43 async function processUndoLike (actorUrl: string, activity: ActivityUndo) {
  44   const likeActivity = activity.object as ActivityLike
  45
  46   const { video } = await getOrCreateAccountAndVideoAndChannel(likeActivity.object)
  47
  48   return sequelizeTypescript.transaction(async t => {
  49     const byAccount = await AccountModel.loadByUrl(actorUrl, t)
  50     if (!byAccount) throw new Error('Unknown account ' + actorUrl)
  51
  52     const rate = await AccountVideoRateModel.load(byAccount.id, video.id, t)
  53     if (!rate) throw new Error(`Unknown rate by account ${byAccount.id} for video ${video.id}.`)
  54
  55     await rate.destroy({ transaction: t })
  56     await video.decrement('likes', { transaction: t })
  57
  58     if (video.isOwned()) {
  59       // Don't resend the activity to the sender
  60       const exceptions = [ byAccount.Actor ]
  61
  62       await forwardVideoRelatedActivity(activity, t, exceptions, video)
  63     }
  64   })
  65 }
  66
  67 async function processUndoDislike (actorUrl: string, activity: ActivityUndo) {
  68   const dislike = activity.object.object as DislikeObject
  69
  70   const { video } = await getOrCreateAccountAndVideoAndChannel(dislike.object)
  71
  72   return sequelizeTypescript.transaction(async t => {
  73     const byAccount = await AccountModel.loadByUrl(actorUrl, t)
  74     if (!byAccount) throw new Error('Unknown account ' + actorUrl)
  75
  76     const rate = await AccountVideoRateModel.load(byAccount.id, video.id, t)
  77     if (!rate) throw new Error(`Unknown rate by account ${byAccount.id} for video ${video.id}.`)
  78
  79     await rate.destroy({ transaction: t })
  80     await video.decrement('dislikes', { transaction: t })
  81
  82     if (video.isOwned()) {
  83       // Don't resend the activity to the sender
  84       const exceptions = [ byAccount.Actor ]
  85
  86       await forwardVideoRelatedActivity(activity, t, exceptions, video)
  87     }
  88   })
  89 }
  90
  91 function processUndoFollow (actorUrl: string, followActivity: ActivityFollow) {
  92   return sequelizeTypescript.transaction(async t => {
  93     const follower = await ActorModel.loadByUrl(actorUrl, t)
  94     const following = await ActorModel.loadByUrl(followActivity.object, t)
  95     const actorFollow = await ActorFollowModel.loadByActorAndTarget(follower.id, following.id, t)
  96
  97     if (!actorFollow) throw new Error(`'Unknown actor follow ${follower.id} -> ${following.id}.`)
  98
  99     await actorFollow.destroy({ transaction: t })
 100
 101     return undefined
 102   })
 103 }
 104
 105 function processUndoAnnounce (actorUrl: string, announceActivity: ActivityAnnounce) {
 106   return sequelizeTypescript.transaction(async t => {
 107     const byAccount = await AccountModel.loadByUrl(actorUrl, t)
 108     if (!byAccount) throw new Error('Unknown account ' + actorUrl)
 109
 110     const share = await VideoShareModel.loadByUrl(announceActivity.id, t)
 111     if (!share) throw new Error(`'Unknown video share ${announceActivity.id}.`)
 112
 113     await share.destroy({ transaction: t })
 114
 115     if (share.Video.isOwned()) {
 116       // Don't resend the activity to the sender
 117       const exceptions = [ byAccount.Actor ]
 118
 119       await forwardVideoRelatedActivity(announceActivity, t, exceptions, share.Video)
 120     }
 121   })
 122 }