hometown/app/lib/activitypub/activity/announce.rb
Eugen Rochko c417e8c198
Filter incoming Announce activities by relation to local activity (#10041)
* Filter incoming Announce activities by relation to local activity

Reject if announcer is not followed by local accounts, and is not
from an enabled relay, and the object is not a local status

Follow-up to #10005

* Fix tests
2019-02-15 18:19:45 +01:00

52 lines
1.4 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::Activity::Announce < ActivityPub::Activity
def perform
original_status = status_from_object
return if original_status.nil? || delete_arrived_first?(@json['id']) || !announceable?(original_status) || !related_to_local_activity?
status = Status.find_by(account: @account, reblog: original_status)
return status unless status.nil?
status = Status.create!(
account: @account,
reblog: original_status,
uri: @json['id'],
created_at: @json['published'],
override_timestamps: @options[:override_timestamps],
visibility: visibility_from_audience
)
distribute(status)
status
end
private
def visibility_from_audience
if equals_or_includes?(@json['to'], ActivityPub::TagManager::COLLECTIONS[:public])
:public
elsif equals_or_includes?(@json['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
:unlisted
elsif equals_or_includes?(@json['to'], @account.followers_url)
:private
else
:direct
end
end
def announceable?(status)
status.account_id == @account.id || status.public_visibility? || status.unlisted_visibility?
end
def related_to_local_activity?
followed_by_local_accounts? || requested_through_relay? || reblog_of_local_status?
end
def reblog_of_local_status?
status_from_uri(object_uri)&.account&.local?
end
end