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# frozen_string_literal: true
class ActivityPub::FetchRemoteKeyService < BaseService
include JsonLdHelper
# Returns account that owns the key
def call(uri, id: true, prefetched_body: nil)
if prefetched_body.nil?
if id
@json = fetch_resource_without_id_validation(uri)
if person?
@json = fetch_resource(@json['id'], true)
elsif uri != @json['id']
return
end
else
@json = fetch_resource(uri, id)
end
else
@json = body_to_json(prefetched_body, compare_id: id ? uri : nil)
end
return unless supported_context?(@json) && expected_type?
return find_account(@json['id'], @json) if person?
@owner = fetch_resource(owner_uri, true)
return unless supported_context?(@owner) && confirmed_owner?
find_account(owner_uri, @owner)
end
private
def find_account(uri, prefetched_body)
account = ActivityPub::TagManager.instance.uri_to_resource(uri, Account)
account ||= ActivityPub::FetchRemoteAccountService.new.call(uri, prefetched_body: prefetched_body)
account
end
def expected_type?
person? || public_key?
end
def person?
equals_or_includes_any?(@json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES)
end
def public_key?
@json['publicKeyPem'].present? && @json['owner'].present?
end
def owner_uri
@owner_uri ||= value_or_id(@json['owner'])
end
def confirmed_owner?
equals_or_includes_any?(@owner['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) && value_or_id(@owner['publicKey']) == @json['id']
end
end
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