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

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