class FollowService < BaseService # Follow a remote user, notify remote user about the follow # @param [Account] source_account From which to follow # @param [String] uri User URI to follow in the form of username@domain def call(source_account, uri) target_account = follow_remote_account_service.(uri) return nil if target_account.nil? || target_account.id == source_account.id follow = source_account.follow!(target_account) if target_account.local? NotificationMailer.follow(target_account, source_account).deliver_later else NotificationWorker.perform_async(follow.stream_entry.id, target_account.id) end merge_into_timeline(target_account, source_account) source_account.ping!(account_url(source_account, format: 'atom'), [Rails.configuration.x.hub_url]) follow end private def merge_into_timeline(from_account, into_account) timeline_key = FeedManager.instance.key(:home, into_account.id) from_account.statuses.find_each do |status| redis.zadd(timeline_key, status.id, status.id) end FeedManager.instance.trim(:home, into_account.id) end def redis $redis end def follow_remote_account_service @follow_remote_account_service ||= FollowRemoteAccountService.new end end