Add ability to purge undeliverable domains from admin interface (#16686)

* Add ability to purge undeliverable domains from admin interface

* Add tests

app/controllers/admin/instances_controller.rb

@@ -14,6 +14,15 @@ module Admin
       authorize :instance, :show?
     end
 
+    def destroy
+      authorize :instance, :destroy?
+
+      Admin::DomainPurgeWorker.perform_async(@instance.domain)
+
+      log_action :destroy, @instance
+      redirect_to admin_instances_path, notice: I18n.t('admin.instances.destroyed_msg', domain: @instance.domain)
+    end
+
     def clear_delivery_errors
       authorize :delivery, :clear_delivery_errors?
 

app/helpers/admin/action_logs_helper.rb

@@ -31,6 +31,8 @@ module Admin::ActionLogsHelper
       link_to truncate(record.text), edit_admin_announcement_path(record.id)
     when 'IpBlock'
       "#{record.ip}/#{record.ip.prefix} (#{I18n.t("simple_form.labels.ip_block.severities.#{record.severity}")})"
+    when 'Instance'
+      record.domain
     end
   end
 
@@ -54,6 +56,8 @@ module Admin::ActionLogsHelper
       truncate(attributes['text'].is_a?(Array) ? attributes['text'].last : attributes['text'])
     when 'IpBlock'
       "#{attributes['ip']}/#{attributes['ip'].prefix} (#{I18n.t("simple_form.labels.ip_block.severities.#{attributes['severity']}")})"
+    when 'Instance'
+      attributes['domain']
     end
   end
 end

app/models/admin/action_log_filter.rb

@@ -26,6 +26,7 @@ class Admin::ActionLogFilter
     destroy_domain_allow: { target_type: 'DomainAllow', action: 'destroy' }.freeze,
     destroy_domain_block: { target_type: 'DomainBlock', action: 'destroy' }.freeze,
     destroy_email_domain_block: { target_type: 'EmailDomainBlock', action: 'destroy' }.freeze,
+    destroy_instance: { target_type: 'Instance', action: 'destroy' }.freeze,
     destroy_unavailable_domain: { target_type: 'UnavailableDomain', action: 'destroy' }.freeze,
     destroy_status: { target_type: 'Status', action: 'destroy' }.freeze,
     disable_2fa_user: { target_type: 'User', action: 'disable' }.freeze,

app/policies/instance_policy.rb

@@ -8,4 +8,8 @@ class InstancePolicy < ApplicationPolicy
   def show?
     admin?
   end
+
+  def destroy?
+    admin?
+  end
 end

app/services/purge_domain_service.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class PurgeDomainService < BaseService
+  def call(domain)
+    Account.remote.where(domain: domain).reorder(nil).find_each do |account|
+      DeleteAccountService.new.call(account, reserve_username: false, skip_side_effects: true)
+    end
+    Instance.refresh
+  end
+end

app/views/admin/instances/show.html.haml

@@ -84,3 +84,5 @@
       = link_to t('admin.instances.delivery.stop'), stop_delivery_admin_instance_path(@instance), data: { confirm: t('admin.accounts.are_you_sure'), method: :post }, class: 'button'
     - else
       = link_to t('admin.instances.delivery.restart'), restart_delivery_admin_instance_path(@instance), data: { confirm: t('admin.accounts.are_you_sure'), method: :post }, class: 'button'
+    - unless @instance.delivery_failure_tracker.available? && @instance.accounts_count > 0
+      = link_to t('admin.instances.purge'), admin_instance_path(@instance), data: { confirm: t('admin.instances.confirm_purge'), method: :delete }, class: 'button'

app/workers/admin/domain_purge_worker.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class Admin::DomainPurgeWorker
+  include Sidekiq::Worker
+
+  def perform(domain)
+    PurgeDomainService.new.call(domain)
+  end
+end