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

   1 import { VideoModel } from '@server/models/video/video'
   2 import { ActivityAnnounce, ActivityFollow, ActivityLike, ActivityUndo, CacheFileObject } from '../../../../shared/models/activitypub'
   3 import { DislikeObject } from '../../../../shared/models/activitypub/objects'
   4 import { retryTransactionWrapper } from '../../../helpers/database-utils'
   5 import { logger } from '../../../helpers/logger'
   6 import { sequelizeTypescript } from '../../../initializers/database'
   7 import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
   8 import { ActorModel } from '../../../models/actor/actor'
   9 import { ActorFollowModel } from '../../../models/actor/actor-follow'
  10 import { VideoRedundancyModel } from '../../../models/redundancy/video-redundancy'
  11 import { VideoShareModel } from '../../../models/video/video-share'
  12 import { APProcessorOptions } from '../../../types/activitypub-processor.model'
  13 import { MActorSignature } from '../../../types/models'
  14 import { forwardVideoRelatedActivity } from '../send/shared/send-utils'
  15 import { federateVideoIfNeeded, getOrCreateAPVideo } from '../videos'
  16
  17 async function processUndoActivity (options: APProcessorOptions<ActivityUndo>) {
  18   const { activity, byActor } = options
  19   const activityToUndo = activity.object
  20
  21   if (activityToUndo.type === 'Like') {
  22     return retryTransactionWrapper(processUndoLike, byActor, activity)
  23   }
  24
  25   if (activityToUndo.type === 'Create') {
  26     if (activityToUndo.object.type === 'CacheFile') {
  27       return retryTransactionWrapper(processUndoCacheFile, byActor, activity)
  28     }
  29   }
  30
  31   if (activityToUndo.type === 'Dislike') {
  32     return retryTransactionWrapper(processUndoDislike, byActor, activity)
  33   }
  34
  35   if (activityToUndo.type === 'Follow') {
  36     return retryTransactionWrapper(processUndoFollow, byActor, activityToUndo)
  37   }
  38
  39   if (activityToUndo.type === 'Announce') {
  40     return retryTransactionWrapper(processUndoAnnounce, byActor, activityToUndo)
  41   }
  42
  43   logger.warn('Unknown activity object type %s -> %s when undo activity.', activityToUndo.type, { activity: activity.id })
  44
  45   return undefined
  46 }
  47
  48 // ---------------------------------------------------------------------------
  49
  50 export {
  51   processUndoActivity
  52 }
  53
  54 // ---------------------------------------------------------------------------
  55
  56 async function processUndoLike (byActor: MActorSignature, activity: ActivityUndo) {
  57   const likeActivity = activity.object as ActivityLike
  58
  59   const { video: onlyVideo } = await getOrCreateAPVideo({ videoObject: likeActivity.object })
  60   // We don't care about likes of remote videos
  61   if (!onlyVideo.isOwned()) return
  62
  63   return sequelizeTypescript.transaction(async t => {
  64     if (!byActor.Account) throw new Error('Unknown account ' + byActor.url)
  65
  66     const video = await VideoModel.loadFull(onlyVideo.id, t)
  67     const rate = await AccountVideoRateModel.loadByAccountAndVideoOrUrl(byActor.Account.id, video.id, likeActivity.id, t)
  68     if (!rate || rate.type !== 'like') throw new Error(`Unknown like by account ${byActor.Account.id} for video ${video.id}.`)
  69
  70     await rate.destroy({ transaction: t })
  71     await video.decrement('likes', { transaction: t })
  72
  73     video.likes--
  74     await federateVideoIfNeeded(video, false, t)
  75   })
  76 }
  77
  78 async function processUndoDislike (byActor: MActorSignature, activity: ActivityUndo) {
  79   const dislike = activity.object.type === 'Dislike'
  80     ? activity.object
  81     : activity.object.object as DislikeObject
  82
  83   const { video: onlyVideo } = await getOrCreateAPVideo({ videoObject: dislike.object })
  84   // We don't care about likes of remote videos
  85   if (!onlyVideo.isOwned()) return
  86
  87   return sequelizeTypescript.transaction(async t => {
  88     if (!byActor.Account) throw new Error('Unknown account ' + byActor.url)
  89
  90     const video = await VideoModel.loadFull(onlyVideo.id, t)
  91     const rate = await AccountVideoRateModel.loadByAccountAndVideoOrUrl(byActor.Account.id, video.id, dislike.id, t)
  92     if (!rate || rate.type !== 'dislike') throw new Error(`Unknown dislike by account ${byActor.Account.id} for video ${video.id}.`)
  93
  94     await rate.destroy({ transaction: t })
  95     await video.decrement('dislikes', { transaction: t })
  96     video.dislikes--
  97
  98     await federateVideoIfNeeded(video, false, t)
  99   })
 100 }
 101
 102 // ---------------------------------------------------------------------------
 103
 104 async function processUndoCacheFile (byActor: MActorSignature, activity: ActivityUndo) {
 105   const cacheFileObject = activity.object.object as CacheFileObject
 106
 107   const { video } = await getOrCreateAPVideo({ videoObject: cacheFileObject.object })
 108
 109   return sequelizeTypescript.transaction(async t => {
 110     const cacheFile = await VideoRedundancyModel.loadByUrl(cacheFileObject.id, t)
 111     if (!cacheFile) {
 112       logger.debug('Cannot undo unknown video cache %s.', cacheFileObject.id)
 113       return
 114     }
 115
 116     if (cacheFile.actorId !== byActor.id) throw new Error('Cannot delete redundancy ' + cacheFile.url + ' of another actor.')
 117
 118     await cacheFile.destroy({ transaction: t })
 119
 120     if (video.isOwned()) {
 121       // Don't resend the activity to the sender
 122       const exceptions = [ byActor ]
 123
 124       await forwardVideoRelatedActivity(activity, t, exceptions, video)
 125     }
 126   })
 127 }
 128
 129 function processUndoAnnounce (byActor: MActorSignature, announceActivity: ActivityAnnounce) {
 130   return sequelizeTypescript.transaction(async t => {
 131     const share = await VideoShareModel.loadByUrl(announceActivity.id, t)
 132     if (!share) throw new Error(`Unknown video share ${announceActivity.id}.`)
 133
 134     if (share.actorId !== byActor.id) throw new Error(`${share.url} is not shared by ${byActor.url}.`)
 135
 136     await share.destroy({ transaction: t })
 137
 138     if (share.Video.isOwned()) {
 139       // Don't resend the activity to the sender
 140       const exceptions = [ byActor ]
 141
 142       await forwardVideoRelatedActivity(announceActivity, t, exceptions, share.Video)
 143     }
 144   })
 145 }
 146
 147 // ---------------------------------------------------------------------------
 148
 149 function processUndoFollow (follower: MActorSignature, followActivity: ActivityFollow) {
 150   return sequelizeTypescript.transaction(async t => {
 151     const following = await ActorModel.loadByUrlAndPopulateAccountAndChannel(followActivity.object, t)
 152     const actorFollow = await ActorFollowModel.loadByActorAndTarget(follower.id, following.id, t)
 153
 154     if (!actorFollow) throw new Error(`'Unknown actor follow ${follower.id} -> ${following.id}.`)
 155
 156     await actorFollow.destroy({ transaction: t })
 157
 158     return undefined
 159   })
 160 }