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mastodon/app/services/resolve_url_service.rb

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# frozen_string_literal: true
class ResolveURLService < BaseService
include JsonLdHelper
include Authorization
attr_reader :url
def call(url, on_behalf_of: nil)
@url = url
@on_behalf_of = on_behalf_of
return process_local_url if local_url?
process_url unless fetched_atom_feed.nil?
end
private
def process_url
if equals_or_includes_any?(type, %w(Application Group Organization Person Service))
FetchRemoteAccountService.new.call(atom_url, body, protocol)
elsif equals_or_includes_any?(type, %w(Note Article Image Video Page Question))
FetchRemoteStatusService.new.call(atom_url, body, protocol)
end
end
def fetched_atom_feed
@_fetched_atom_feed ||= FetchAtomService.new.call(url)
end
def atom_url
fetched_atom_feed.first
end
def body
fetched_atom_feed.second[:prefetched_body]
end
def protocol
fetched_atom_feed.third
end
def type
return json_data['type'] if protocol == :activitypub
case xml_root
when 'feed'
'Person'
when 'entry'
'Note'
end
end
def json_data
@_json_data ||= body_to_json(body)
end
def xml_root
xml_data.root.name
end
def xml_data
@_xml_data ||= Nokogiri::XML(body, nil, 'utf-8')
end
def local_url?
TagManager.instance.local_url?(@url)
end
def process_local_url
recognized_params = Rails.application.routes.recognize_path(@url)
return unless recognized_params[:action] == 'show'
if recognized_params[:controller] == 'stream_entries'
status = StreamEntry.find_by(id: recognized_params[:id])&.status
check_local_status(status)
elsif recognized_params[:controller] == 'statuses'
status = Status.find_by(id: recognized_params[:id])
check_local_status(status)
elsif recognized_params[:controller] == 'accounts'
Account.find_local(recognized_params[:username])
end
end
def check_local_status(status)
return if status.nil?
authorize_with @on_behalf_of, status, :show?
status
rescue Mastodon::NotPermittedError
# Do not disclose the existence of status the user is not authorized to see
nil
end
end