# frozen_string_literal: true class FollowService < BaseService include Redisable include Payloadable include DomainControlHelper # Follow a remote user, notify remote user about the follow # @param [Account] source_account From which to follow # @param [Account] target_account Account to follow # @param [Hash] options # @option [Boolean] :reblogs Whether or not to show reblogs, defaults to true # @option [Boolean] :notify Whether to create notifications about new posts, defaults to false # @option [Array<String>] :languages Which languages to allow on the home feed from this account, defaults to all # @option [Boolean] :bypass_locked # @option [Boolean] :bypass_limit Allow following past the total follow number # @option [Boolean] :with_rate_limit def call(source_account, target_account, options = {}) @source_account = source_account @target_account = target_account @options = { bypass_locked: false, bypass_limit: false, with_rate_limit: false }.merge(options) raise ActiveRecord::RecordNotFound if following_not_possible? raise Mastodon::NotPermittedError if following_not_allowed? if @source_account.following?(@target_account) return change_follow_options! elsif @source_account.requested?(@target_account) return change_follow_request_options! end ActivityTracker.increment('activity:interactions') # When an account follows someone for the first time, avoid showing # an empty home feed while the follow request is being processed # and the feeds are being merged mark_home_feed_as_partial! if @source_account.not_following_anyone? if (@target_account.locked? && !@options[:bypass_locked]) || @source_account.silenced? || @target_account.activitypub? request_follow! elsif @target_account.local? direct_follow! end end private def mark_home_feed_as_partial! redis.set("account:#{@source_account.id}:regeneration", true, nx: true, ex: 1.day.seconds) end def following_not_possible? @target_account.nil? || @target_account.id == @source_account.id || @target_account.unavailable? end def following_not_allowed? domain_not_allowed?(@target_account.domain) || @target_account.blocking?(@source_account) || @source_account.blocking?(@target_account) || @target_account.moved? || (!@target_account.local? && @target_account.ostatus?) || @source_account.domain_blocking?(@target_account.domain) end def change_follow_options! @source_account.follow!(@target_account, **follow_options) end def change_follow_request_options! @source_account.request_follow!(@target_account, **follow_options) end def request_follow! follow_request = @source_account.request_follow!(@target_account, **follow_options.merge(rate_limit: @options[:with_rate_limit], bypass_limit: @options[:bypass_limit])) if @target_account.local? LocalNotificationWorker.perform_async(@target_account.id, follow_request.id, follow_request.class.name, 'follow_request') elsif @target_account.activitypub? ActivityPub::DeliveryWorker.perform_async(build_json(follow_request), @source_account.id, @target_account.inbox_url, { 'bypass_availability' => true }) end follow_request end def direct_follow! follow = @source_account.follow!(@target_account, **follow_options.merge(rate_limit: @options[:with_rate_limit], bypass_limit: @options[:bypass_limit])) LocalNotificationWorker.perform_async(@target_account.id, follow.id, follow.class.name, 'follow') MergeWorker.perform_async(@target_account.id, @source_account.id) follow end def build_json(follow_request) Oj.dump(serialize_payload(follow_request, ActivityPub::FollowSerializer)) end def follow_options @options.slice(:reblogs, :notify, :languages) end end