Use Contact User as Relay, Report, Subscribe. (#9661)

* Use Contact User as Relay, Report, Subscribe.

* Use Account.representative to fetch contact user.

* Use find_local.

* No reason to use Account.representative in subscribe_service.

* Don't required representative!

* Fallback is included in Account.representative method.

app/models/concerns/account_finder_concern.rb

@@ -12,6 +12,10 @@ module AccountFinderConcern
       find_remote(username, domain) || raise(ActiveRecord::RecordNotFound)
     end
 
+    def representative
+      find_local(Setting.site_contact_username.gsub(/\A@/, '')) || Account.local.find_by(suspended: false)
+    end
+
     def find_local(username)
       find_remote(username, nil)
     end

app/models/relay.rb

@@ -68,7 +68,7 @@ class Relay < ApplicationRecord
   end
 
   def some_local_account
-    @some_local_account ||= Account.local.find_by(suspended: false)
+    @some_local_account ||= Account.representative
   end
 
   def ensure_disabled

app/services/report_service.rb

@@ -52,6 +52,6 @@ class ReportService < BaseService
   end
 
   def some_local_account
-    @some_local_account ||= Account.local.where(suspended: false).first
+    @some_local_account ||= Account.representative
   end
 end