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