Add notification policies and notification requests (#29366)

app/workers/unfilter_notifications_worker.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+class UnfilterNotificationsWorker
+  include Sidekiq::Worker
+
+  def perform(notification_request_id)
+    @notification_request = NotificationRequest.find(notification_request_id)
+
+    push_to_conversations!
+    unfilter_notifications!
+    remove_request!
+  rescue ActiveRecord::RecordNotFound
+    true
+  end
+
+  private
+
+  def push_to_conversations!
+    notifications_with_private_mentions.find_each { |notification| AccountConversation.add_status(@notification_request.account, notification.target_status) }
+  end
+
+  def unfilter_notifications!
+    filtered_notifications.in_batches.update_all(filtered: false)
+  end
+
+  def remove_request!
+    @notification_request.destroy!
+  end
+
+  def filtered_notifications
+    Notification.where(account: @notification_request.account, from_account: @notification_request.from_account, filtered: true)
+  end
+
+  def notifications_with_private_mentions
+    filtered_notifications.joins(mention: :status).merge(Status.where(visibility: :direct)).includes(mention: :status)
+  end
+end