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# frozen_string_literal: true
class FollowService < BaseService
include StreamEntryRenderer
# 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 = FollowRemoteAccountService.new.call(uri)
raise ActiveRecord::RecordNotFound if target_account.nil? || target_account.id == source_account.id || target_account.suspended?
raise Mastodon::NotPermittedError if target_account.blocking?(source_account) || source_account.blocking?(target_account)
if target_account.locked?
request_follow(source_account, target_account)
else
direct_follow(source_account, target_account)
end
end
private
def request_follow(source_account, target_account)
follow_request = FollowRequest.create!(account: source_account, target_account: target_account)
if target_account.local?
NotifyService.new.call(target_account, follow_request)
else
NotificationWorker.perform_async(build_follow_request_xml(follow_request), source_account.id, target_account.id)
AfterRemoteFollowRequestWorker.perform_async(follow_request.id)
end
follow_request
end
def direct_follow(source_account, target_account)
follow = source_account.follow!(target_account)
if target_account.local?
NotifyService.new.call(target_account, follow)
else
SubscribeService.new.call(target_account) unless target_account.subscribed?
NotificationWorker.perform_async(build_follow_xml(follow), source_account.id, target_account.id)
AfterRemoteFollowWorker.perform_async(follow.id)
end
MergeWorker.perform_async(target_account.id, source_account.id)
follow
end
def redis
Redis.current
end
def build_follow_request_xml(follow_request)
description = "#{follow_request.account.acct} requested to follow #{follow_request.target_account.acct}"
Nokogiri::XML::Builder.new do |xml|
entry(xml, true) do
unique_id xml, follow_request.created_at, follow_request.id, 'FollowRequest'
title xml, description
content xml, description
author(xml) do
include_author xml, follow_request.account
end
object_type xml, :activity
verb xml, :request_friend
target(xml) do
include_author xml, follow_request.target_account
end
end
end.to_xml
end
def build_follow_xml(follow)
description = "#{follow.account.acct} started following #{follow.target_account.acct}"
Nokogiri::XML::Builder.new do |xml|
entry(xml, true) do
unique_id xml, follow.created_at, follow.id, 'Follow'
title xml, description
content xml, description
author(xml) do
include_author xml, follow.account
end
object_type xml, :activity
verb xml, :follow
target(xml) do
include_author xml, follow.target_account
end
end
end.to_xml
end
end
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