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