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

   1 import { ActivityFollow } from '../../../../shared/models/activitypub'
   2 import { retryTransactionWrapper } from '../../../helpers/database-utils'
   3 import { logger } from '../../../helpers/logger'
   4 import { sequelizeTypescript } from '../../../initializers'
   5 import { ActorModel } from '../../../models/activitypub/actor'
   6 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
   7 import { sendAccept, sendReject } from '../send'
   8 import { Notifier } from '../../notifier'
   9 import { getAPId } from '../../../helpers/activitypub'
  10 import { getServerActor } from '../../../helpers/utils'
  11 import { CONFIG } from '../../../initializers/config'
  12 import { APProcessorOptions } from '../../../typings/activitypub-processor.model'
  13
  14 async function processFollowActivity (options: APProcessorOptions<ActivityFollow>) {
  15   const { activity, byActor } = options
  16   const activityObject = getAPId(activity.object)
  17
  18   return retryTransactionWrapper(processFollow, byActor, activityObject)
  19 }
  20
  21 // ---------------------------------------------------------------------------
  22
  23 export {
  24   processFollowActivity
  25 }
  26
  27 // ---------------------------------------------------------------------------
  28
  29 async function processFollow (actor: ActorModel, targetActorURL: string) {
  30   const { actorFollow, created, isFollowingInstance } = await sequelizeTypescript.transaction(async t => {
  31     const targetActor = await ActorModel.loadByUrlAndPopulateAccountAndChannel(targetActorURL, t)
  32
  33     if (!targetActor) throw new Error('Unknown actor')
  34     if (targetActor.isOwned() === false) throw new Error('This is not a local actor.')
  35
  36     const serverActor = await getServerActor()
  37     const isFollowingInstance = targetActor.id === serverActor.id
  38
  39     if (isFollowingInstance && CONFIG.FOLLOWERS.INSTANCE.ENABLED === false) {
  40       logger.info('Rejecting %s because instance followers are disabled.', targetActor.url)
  41
  42       await sendReject(actor, targetActor)
  43
  44       return { actorFollow: undefined }
  45     }
  46
  47     const [ actorFollow, created ] = await ActorFollowModel.findOrCreate({
  48       where: {
  49         actorId: actor.id,
  50         targetActorId: targetActor.id
  51       },
  52       defaults: {
  53         actorId: actor.id,
  54         targetActorId: targetActor.id,
  55         state: CONFIG.FOLLOWERS.INSTANCE.MANUAL_APPROVAL ? 'pending' : 'accepted'
  56       },
  57       transaction: t
  58     })
  59
  60     if (actorFollow.state !== 'accepted' && CONFIG.FOLLOWERS.INSTANCE.MANUAL_APPROVAL === false) {
  61       actorFollow.state = 'accepted'
  62       await actorFollow.save({ transaction: t })
  63     }
  64
  65     actorFollow.ActorFollower = actor
  66     actorFollow.ActorFollowing = targetActor
  67
  68     // Target sends to actor he accepted the follow request
  69     if (actorFollow.state === 'accepted') await sendAccept(actorFollow)
  70
  71     return { actorFollow, created, isFollowingInstance }
  72   })
  73
  74   // Rejected
  75   if (!actorFollow) return
  76
  77   if (created) {
  78     if (isFollowingInstance) Notifier.Instance.notifyOfNewInstanceFollow(actorFollow)
  79     else Notifier.Instance.notifyOfNewUserFollow(actorFollow)
  80   }
  81
  82   logger.info('Actor %s is followed by actor %s.', targetActorURL, actor.url)
  83 }