class ProcessInteractionService include ApplicationHelper def call(envelope, target_account) body = salmon.unpack(envelope) xml = Nokogiri::XML(body) return unless contains_author?(xml) username = xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:name').content url = xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:uri').content domain = Addressable::URI.parse(url).host account = Account.find_by(username: username, domain: domain) if account.nil? account = follow_remote_account_service.("acct:#{username}@#{domain}") return if account.nil? end if salmon.verify(envelope, account.keypair) case verb(xml) when :follow follow!(account, target_account) when :unfollow unfollow!(account, target_account) when :favorite favourite!(xml, account) when :post add_post!(body, account) if mentions_account?(xml, target_account) when :share add_post!(body, account) unless status.nil? end end end private def contains_author?(xml) !(xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:name').nil? || xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:uri').nil?) end def mentions_account?(xml, account) xml.xpath('/xmlns:entry/xmlns:link[@rel="mentioned"]').each { |mention_link| return true if mention_link.attribute('ref') == profile_url(name: account.username) } false end def verb(xml) xml.at_xpath('//activity:verb').content.gsub('http://activitystrea.ms/schema/1.0/', '').to_sym end def follow!(account, target_account) account.follow!(target_account) end def unfollow!(account, target_account) account.unfollow!(target_account) end def favourite!(xml, from_account) status.favourites.first_or_create!(account: from_account) end def add_post!(body, account) process_feed_service.(body, account) end def status(xml) Status.find(unique_tag_to_local_id(activity_id, 'Status')) end def activity_id(xml) xml.at_xpath('/xmlns:entry/xmlns:id').content end def salmon OStatus2::Salmon.new end def follow_remote_account_service FollowRemoteAccountService.new end def process_feed_service ProcessFeedService.new end end