Refactor the DeleteUserWorker

app/controllers/registrations_controller.rb

@@ -25,7 +25,7 @@ class RegistrationsController < Devise::RegistrationsController
   end
   def destroy
-    DeleteUserWorker.perform_async(current_user.id, current_user.id)
+    current_user.delete_async(deleted_by: current_user)
     respond_to do |format|
       format.html do

app/models/abuse_report.rb

@@ -15,8 +15,7 @@ class AbuseReport < ActiveRecord::Base
   alias_method :author, :reporter
   def remove_user(deleted_by:)
-    user.block
-    DeleteUserWorker.perform_async(deleted_by.id, user.id, delete_solo_owned_groups: true, hard_delete: true)
+    user.delete_async(deleted_by: deleted_by, params: { hard_delete: true })
   end
   def notify

app/models/spam_log.rb

@@ -4,8 +4,7 @@ class SpamLog < ActiveRecord::Base
   validates :user, presence: true
   def remove_user(deleted_by:)
-    user.block
-    DeleteUserWorker.perform_async(deleted_by.id, user.id, delete_solo_owned_groups: true, hard_delete: true)
+    user.delete_async(deleted_by: deleted_by, params: { hard_delete: true })
   end
   def text

app/models/user.rb

@@ -809,6 +809,11 @@ class User < ActiveRecord::Base
     system_hook_service.execute_hooks_for(self, :destroy)
   end
+  def delete_async(deleted_by:, params: {})
+    block if params[:hard_delete]
+    DeleteUserWorker.perform_async(deleted_by.id, id, params)
+  end
+
   def notification_service
     NotificationService.new
   end

app/services/users/destroy_service.rb

@@ -6,12 +6,27 @@ module Users
       @current_user = current_user
     end
+    # Synchronously destroys +user+
+    #
+    # The operation will fail if the user is the sole owner of any groups. To
+    # force the groups to be destroyed, pass `delete_solo_owned_groups: true` in
+    # +options+.
+    #
+    # The user's contributions will be migrated to a global ghost user. To
+    # force the contributions to be destroyed, pass `hard_delete: true` in
+    # +options+.
+    #
+    # `hard_delete: true` implies `delete_solo_owned_groups: true`.  To perform
+    # a hard deletion without destroying solo-owned groups, pass
+    # `delete_solo_owned_groups: false, hard_delete: true` in +options+.
     def execute(user, options = {})
+      delete_solo_owned_groups = options.fetch(:delete_solo_owned_groups, options[:hard_delete])
+
       unless Ability.allowed?(current_user, :destroy_user, user)
         raise Gitlab::Access::AccessDeniedError, "#{current_user} tried to destroy user #{user}!"
       end
-      if !options[:delete_solo_owned_groups] && user.solo_owned_groups.present?
+      if !delete_solo_owned_groups && user.solo_owned_groups.present?
         user.errors[:base] << 'You must transfer ownership or delete groups before you can remove user'
         return user
       end

lib/api/users.rb

@@ -293,7 +293,7 @@ module API
         user = User.find_by(id: params[:id])
         not_found!('User') unless user
-        DeleteUserWorker.perform_async(current_user.id, user.id, hard_delete: params[:hard_delete])
+        user.delete_async(deleted_by: current_user, params: params)
       end
       desc 'Block a user. Available only for admins.'

spec/controllers/registrations_controller_spec.rb

@@ -77,7 +77,7 @@ describe RegistrationsController do
     end
     it 'schedules the user for destruction' do
-      expect(DeleteUserWorker).to receive(:perform_async).with(user.id, user.id)
+      expect(DeleteUserWorker).to receive(:perform_async).with(user.id, user.id, {})
       post(:destroy)

spec/models/abuse_report_spec.rb

@@ -28,9 +28,7 @@ RSpec.describe AbuseReport, type: :model do
     end
     it 'lets a worker delete the user' do
-      expect(DeleteUserWorker).to receive(:perform_async).with(user.id, subject.user.id,
-                                                              delete_solo_owned_groups: true,
-                                                              hard_delete: true)
+      expect(DeleteUserWorker).to receive(:perform_async).with(user.id, subject.user.id, hard_delete: true)
       subject.remove_user(deleted_by: user)
     end