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