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/database'
   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 { CONFIG } from '../../../initializers/config'
  11 import { APProcessorOptions } from '../../../typings/activitypub-processor.model'
  12 import { MActorFollowActors, MActorSignature } from '../../../typings/models'
  13 import { autoFollowBackIfNeeded } from '../follow'
  14 import { getServerActor } from '@server/models/application/application'
  15
  16 async function processFollowActivity (options: APProcessorOptions<ActivityFollow>) {
  17   const { activity, byActor } = options
  18   const activityObject = getAPId(activity.object)
  19
  20   return retryTransactionWrapper(processFollow, byActor, activityObject)
  21 }
  22
  23 // ---------------------------------------------------------------------------
  24
  25 export {
  26   processFollowActivity
  27 }
  28
  29 // ---------------------------------------------------------------------------
  30
  31 async function processFollow (byActor: MActorSignature, targetActorURL: string) {
  32   const { actorFollow, created, isFollowingInstance, targetActor } = await sequelizeTypescript.transaction(async t => {
  33     const targetActor = await ActorModel.loadByUrlAndPopulateAccountAndChannel(targetActorURL, t)
  34
  35     if (!targetActor) throw new Error('Unknown actor')
  36     if (targetActor.isOwned() === false) throw new Error('This is not a local actor.')
  37
  38     const serverActor = await getServerActor()
  39     const isFollowingInstance = targetActor.id === serverActor.id
  40
  41     if (isFollowingInstance && CONFIG.FOLLOWERS.INSTANCE.ENABLED === false) {
  42       logger.info('Rejecting %s because instance followers are disabled.', targetActor.url)
  43
  44       await sendReject(byActor, targetActor)
  45
  46       return { actorFollow: undefined as MActorFollowActors }
  47     }
  48
  49     const [ actorFollow, created ] = await ActorFollowModel.findOrCreate<MActorFollowActors>({
  50       where: {
  51         actorId: byActor.id,
  52         targetActorId: targetActor.id
  53       },
  54       defaults: {
  55         actorId: byActor.id,
  56         targetActorId: targetActor.id,
  57         state: CONFIG.FOLLOWERS.INSTANCE.MANUAL_APPROVAL ? 'pending' : 'accepted'
  58       },
  59       transaction: t
  60     })
  61
  62     // Set the follow as accepted if the remote actor follows a channel or account
  63     // Or if the instance automatically accepts followers
  64     if (actorFollow.state !== 'accepted' && (isFollowingInstance === false || CONFIG.FOLLOWERS.INSTANCE.MANUAL_APPROVAL === false)) {
  65       actorFollow.state = 'accepted'
  66       await actorFollow.save({ transaction: t })
  67     }
  68
  69     actorFollow.ActorFollower = byActor
  70     actorFollow.ActorFollowing = targetActor
  71
  72     // Target sends to actor he accepted the follow request
  73     if (actorFollow.state === 'accepted') {
  74       await sendAccept(actorFollow)
  75       await autoFollowBackIfNeeded(actorFollow)
  76     }
  77
  78     return { actorFollow, created, isFollowingInstance, targetActor }
  79   })
  80
  81   // Rejected
  82   if (!actorFollow) return
  83
  84   if (created) {
  85     const follower = await ActorModel.loadFull(byActor.id)
  86     const actorFollowFull = Object.assign(actorFollow, { ActorFollowing: targetActor, ActorFollower: follower })
  87
  88     if (isFollowingInstance) {
  89       Notifier.Instance.notifyOfNewInstanceFollow(actorFollowFull)
  90     } else {
  91       Notifier.Instance.notifyOfNewUserFollow(actorFollowFull)
  92     }
  93   }
  94
  95   logger.info('Actor %s is followed by actor %s.', targetActorURL, byActor.url)
  96 }