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

   1 import { 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 { forwardActivity } from '../send/misc'
  12 import { getOrCreateAccountAndVideoAndChannel } from '../videos'
  13
  14 async function processUndoActivity (activity: ActivityUndo) {
  15   const activityToUndo = activity.object
  16
  17   const actorUrl = getActorUrl(activity.actor)
  18
  19   if (activityToUndo.type === 'Like') {
  20     return processUndoLike(actorUrl, activity)
  21   } else if (activityToUndo.type === 'Create' && activityToUndo.object.type === 'Dislike') {
  22     return processUndoDislike(actorUrl, activity)
  23   } else if (activityToUndo.type === 'Follow') {
  24     return processUndoFollow(actorUrl, activityToUndo)
  25   }
  26
  27   logger.warn('Unknown activity object type %s -> %s when undo activity.', activityToUndo.type, { activity: activity.id })
  28
  29   return undefined
  30 }
  31
  32 // ---------------------------------------------------------------------------
  33
  34 export {
  35   processUndoActivity
  36 }
  37
  38 // ---------------------------------------------------------------------------
  39
  40 function processUndoLike (actorUrl: string, activity: ActivityUndo) {
  41   const options = {
  42     arguments: [ actorUrl, activity ],
  43     errorMessage: 'Cannot undo like with many retries.'
  44   }
  45
  46   return retryTransactionWrapper(undoLike, options)
  47 }
  48
  49 async function undoLike (actorUrl: string, activity: ActivityUndo) {
  50   const likeActivity = activity.object as ActivityLike
  51
  52   const { video } = await getOrCreateAccountAndVideoAndChannel(likeActivity.object)
  53
  54   return sequelizeTypescript.transaction(async t => {
  55     const byAccount = await AccountModel.loadByUrl(actorUrl, t)
  56     if (!byAccount) throw new Error('Unknown account ' + actorUrl)
  57
  58     const rate = await AccountVideoRateModel.load(byAccount.id, video.id, t)
  59     if (!rate) throw new Error(`Unknown rate by account ${byAccount.id} for video ${video.id}.`)
  60
  61     await rate.destroy({ transaction: t })
  62     await video.decrement('likes', { transaction: t })
  63
  64     if (video.isOwned()) {
  65       // Don't resend the activity to the sender
  66       const exceptions = [ byAccount.Actor ]
  67       await forwardActivity(activity, t, exceptions)
  68     }
  69   })
  70 }
  71
  72 function processUndoDislike (actorUrl: string, activity: ActivityUndo) {
  73   const options = {
  74     arguments: [ actorUrl, activity ],
  75     errorMessage: 'Cannot undo dislike with many retries.'
  76   }
  77
  78   return retryTransactionWrapper(undoDislike, options)
  79 }
  80
  81 async function undoDislike (actorUrl: string, activity: ActivityUndo) {
  82   const dislike = activity.object.object as DislikeObject
  83
  84   const { video } = await getOrCreateAccountAndVideoAndChannel(dislike.object)
  85
  86   return sequelizeTypescript.transaction(async t => {
  87     const byAccount = await AccountModel.loadByUrl(actorUrl, t)
  88     if (!byAccount) throw new Error('Unknown account ' + actorUrl)
  89
  90     const rate = await AccountVideoRateModel.load(byAccount.id, video.id, t)
  91     if (!rate) throw new Error(`Unknown rate by account ${byAccount.id} for video ${video.id}.`)
  92
  93     await rate.destroy({ transaction: t })
  94     await video.decrement('dislikes', { transaction: t })
  95
  96     if (video.isOwned()) {
  97       // Don't resend the activity to the sender
  98       const exceptions = [ byAccount.Actor ]
  99       await forwardActivity(activity, t, exceptions)
 100     }
 101   })
 102 }
 103
 104 function processUndoFollow (actorUrl: string, followActivity: ActivityFollow) {
 105   const options = {
 106     arguments: [ actorUrl, followActivity ],
 107     errorMessage: 'Cannot undo follow with many retries.'
 108   }
 109
 110   return retryTransactionWrapper(undoFollow, options)
 111 }
 112
 113 function undoFollow (actorUrl: string, followActivity: ActivityFollow) {
 114   return sequelizeTypescript.transaction(async t => {
 115     const follower = await ActorModel.loadByUrl(actorUrl, t)
 116     const following = await ActorModel.loadByUrl(followActivity.object, t)
 117     const actorFollow = await ActorFollowModel.loadByActorAndTarget(follower.id, following.id, t)
 118
 119     if (!actorFollow) throw new Error(`'Unknown actor follow ${follower.id} -> ${following.id}.`)
 120
 121     await actorFollow.destroy({ transaction: t })
 122
 123     return undefined
 124   })
 125 }