feat: Add notification_deleted action cable event (#8431)

app/listeners/action_cable_listener.rb

@@ -7,6 +7,12 @@ class ActionCableListener < BaseListener
     broadcast(account, tokens, NOTIFICATION_CREATED, { notification: notification.push_event_data, unread_count: unread_count, count: count })
   end
 
+  def notification_deleted(event)
+    notification, account, unread_count, count = extract_notification_and_account(event)
+    tokens = [event.data[:notification].user.pubsub_token]
+    broadcast(account, tokens, NOTIFICATION_DELETED, notification: notification, unread_count: unread_count, count: count)
+  end
+
   def account_cache_invalidated(event)
     account = event.data[:account]
     tokens = user_tokens(account, account.agents)

app/models/notification.rb

@@ -41,6 +41,7 @@ class Notification < ApplicationRecord
   enum notification_type: NOTIFICATION_TYPES
 
   after_create_commit :process_notification_delivery, :dispatch_create_event
+  after_destroy_commit :dispatch_destroy_event
 
   # TODO: Get rid of default scope
   # https://stackoverflow.com/a/1834250/939299
@@ -135,4 +136,8 @@ class Notification < ApplicationRecord
   def dispatch_create_event
     Rails.configuration.dispatcher.dispatch(NOTIFICATION_CREATED, Time.zone.now, notification: self)
   end
+
+  def dispatch_destroy_event
+    Rails.configuration.dispatcher.dispatch(NOTIFICATION_DELETED, Time.zone.now, notification: self)
+  end
 end