Add sidekiq as a job backend

app/interactions/domains/expire_period/process_expired.rb

@@ -14,7 +14,7 @@ module Domains
         return unless saved
 
         recipients.each do |recipient|
-          DomainExpireEmailJob.enqueue(domain.id, recipient, run_at: send_time)
+          DomainExpireEmailJob.set(wait_until: send_time).perform_later(domain.id, recipient)
         end
       end
 

app/jobs/domain_expire_email_job.rb

@@ -1,4 +1,4 @@
-class DomainExpireEmailJob < Que::Job
+class DomainExpireEmailJob < ApplicationJob
   def perform(domain_id, email)
     domain = Domain.find(domain_id)
 

app/jobs/registrant_change_expired_email_job.rb

@@ -12,7 +12,8 @@ class RegistrantChangeExpiredEmailJob < ApplicationJob
   private
 
   def log(domain)
-    message = "Send RegistrantChangeMailer#expired email for domain #{domain.name} (##{domain.id}) to #{domain.new_registrant_email}"
+    message = 'Send RegistrantChangeMailer#expired email for domain '\
+               "#{domain.name} (##{domain.id}) to #{domain.new_registrant_email}"
     logger.info(message)
   end
 

app/models/concerns/domain/deletable.rb

@@ -19,8 +19,12 @@ module Domain::Deletable
   end
 
   def do_not_delete_later
-    # Que job can be manually deleted in admin area UI
-    QueJob.find_by("args->>0 = '#{id}'", job_class: DomainDeleteJob.name)&.destroy
+    return if Rails.env.test?
+
+    jobs = Sidekiq::ScheduledSet.new.select do |job|
+      job.args.first['job_class'] == 'DomainDeleteJob' && job.args.first['arguments'] == [id]
+    end
+    jobs.each(&:delete)
   end
 
   def deletion_time_span

app/models/que_job.rb

@@ -1,4 +0,0 @@
-# To be able to remove existing jobs
-class QueJob < ApplicationRecord
-  self.primary_key = 'job_id'
-end