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

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import { getServerActor } from '@server/models/application/application'
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import { ActivityFollow } from '../../../../shared/models/activitypub'
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import { getAPId } from '../../../helpers/activitypub'
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import { retryTransactionWrapper } from '../../../helpers/database-utils'
import { logger } from '../../../helpers/logger'
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import { CONFIG } from '../../../initializers/config'
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import { sequelizeTypescript } from '../../../initializers/database'
import { ActorModel } from '../../../models/actor/actor'
import { ActorFollowModel } from '../../../models/actor/actor-follow'
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import { APProcessorOptions } from '../../../types/activitypub-processor.model'
import { MActorFollowActors, MActorSignature } from '../../../types/models'
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import { Notifier } from '../../notifier'
import { autoFollowBackIfNeeded } from '../follow'
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import { sendAccept, sendReject } from '../send'
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async function processFollowActivity (options: APProcessorOptions<ActivityFollow>) {
const { activity, byActor } = options
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const activityId = activity.id
const objectId = getAPId(activity.object)
return retryTransactionWrapper(processFollow, byActor, activityId, objectId)
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}
// ---------------------------------------------------------------------------
export {
processFollowActivity
}
// ---------------------------------------------------------------------------
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async function processFollow (byActor: MActorSignature, activityId: string, targetActorURL: string) {
const { actorFollow, created, isFollowingInstance, targetActor } = await sequelizeTypescript.transaction(async t => {
const targetActor = await ActorModel.loadByUrlAndPopulateAccountAndChannel(targetActorURL, t)
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if (!targetActor) throw new Error('Unknown actor')
if (targetActor.isOwned() === false) throw new Error('This is not a local actor.')
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const serverActor = await getServerActor()
const isFollowingInstance = targetActor.id === serverActor.id
if (isFollowingInstance && CONFIG.FOLLOWERS.INSTANCE.ENABLED === false) {
logger.info('Rejecting %s because instance followers are disabled.', targetActor.url)
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sendReject(activityId, byActor, targetActor)
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return { actorFollow: undefined as MActorFollowActors }
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}
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const [ actorFollow, created ] = await ActorFollowModel.findOrCreateCustom({
byActor,
targetActor,
activityId,
state: CONFIG.FOLLOWERS.INSTANCE.MANUAL_APPROVAL
? 'pending'
: 'accepted',
transaction: t
})
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// Set the follow as accepted if the remote actor follows a channel or account
// Or if the instance automatically accepts followers
if (actorFollow.state !== 'accepted' && (isFollowingInstance === false || CONFIG.FOLLOWERS.INSTANCE.MANUAL_APPROVAL === false)) {
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actorFollow.state = 'accepted'
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await actorFollow.save({ transaction: t })
}
// Before PeerTube V3 we did not save the follow ID. Try to fix these old follows
if (!actorFollow.url) {
actorFollow.url = activityId
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await actorFollow.save({ transaction: t })
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}
actorFollow.ActorFollower = byActor
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actorFollow.ActorFollowing = targetActor
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// Target sends to actor he accepted the follow request
if (actorFollow.state === 'accepted') {
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sendAccept(actorFollow)
await autoFollowBackIfNeeded(actorFollow, t)
}
return { actorFollow, created, isFollowingInstance, targetActor }
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})
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// Rejected
if (!actorFollow) return
if (created) {
const follower = await ActorModel.loadFull(byActor.id)
const actorFollowFull = Object.assign(actorFollow, { ActorFollowing: targetActor, ActorFollower: follower })
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if (isFollowingInstance) {
Notifier.Instance.notifyOfNewInstanceFollow(actorFollowFull)
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} else {
Notifier.Instance.notifyOfNewUserFollow(actorFollowFull)
}
}
logger.info('Actor %s is followed by actor %s.', targetActorURL, byActor.url)
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}