nyastodon/app/lib/activitypub/activity/follow.rb
Claire be3b9f8151
Fix URI of repeat follow requests not being recorded (#15662)
* Fix URI of repeat follow requests not being recorded

In case we receive a “repeat” or “duplicate” follow request, we automatically
fast-forward the accept with the latest received Activity `id`, but we don't
record it.

In general, a “repeat” or “duplicate” follow request may happen if for some
reason (e.g. inconsistent handling of Block or Undo Accept activities, an
instance being brought back up from the dead, etc.) the local instance thought
the remote actor were following them while the remote actor thought otherwise.

In those cases, the remote instance does not know about the older Follow
activity `id`, so keeping that record serves no purpose, but knowing the most
recent one is useful if the remote implementation at some point refers to it
by `id` without inlining it.

* Add tests
2021-02-11 01:53:44 +01:00

45 lines
1.8 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::Activity::Follow < ActivityPub::Activity
include Payloadable
def perform
target_account = account_from_uri(object_uri)
return if target_account.nil? || !target_account.local? || delete_arrived_first?(@json['id'])
# Update id of already-existing follow requests
existing_follow_request = ::FollowRequest.find_by(account: @account, target_account: target_account)
unless existing_follow_request.nil?
existing_follow_request.update!(uri: @json['id'])
return
end
if target_account.blocking?(@account) || target_account.domain_blocking?(@account.domain) || target_account.moved? || target_account.instance_actor?
reject_follow_request!(target_account)
return
end
# Fast-forward repeat follow requests
existing_follow = ::Follow.find_by(account: @account, target_account: target_account)
unless existing_follow.nil?
existing_follow.update!(uri: @json['id'])
AuthorizeFollowService.new.call(@account, target_account, skip_follow_request: true, follow_request_uri: @json['id'])
return
end
follow_request = FollowRequest.create!(account: @account, target_account: target_account, uri: @json['id'])
if target_account.locked? || @account.silenced?
NotifyService.new.call(target_account, :follow_request, follow_request)
else
AuthorizeFollowService.new.call(@account, target_account)
NotifyService.new.call(target_account, :follow, ::Follow.find_by(account: @account, target_account: target_account))
end
end
def reject_follow_request!(target_account)
json = Oj.dump(serialize_payload(FollowRequest.new(account: @account, target_account: target_account, uri: @json['id']), ActivityPub::RejectFollowSerializer))
ActivityPub::DeliveryWorker.perform_async(json, target_account.id, @account.inbox_url)
end
end