```ruby
class Events::UserAddedToGroup < Event
  include Events::EmailUser
  include Events::NotifyUser

  def self.publish!(membership, inviter, message = nil)
    bulk_publish!(Array(membership), inviter, message).first
  end

  def self.bulk_publish!(memberships, inviter, message = nil)
    memberships.map do |membership|
      new(
        kind: 'user_added_to_group',
        user: inviter,
        eventable: membership,
        custom_fields: { message: message }
      )
    end.tap do |events|
      import(events)
      events.map { |event| EventBus.broadcast('user_added_to_group_event', event) }
    end
  end

  def email_users!
    mailer.send(kind, eventable.user, self, custom_fields['message']).deliver_now
  end

  def notify_users!
    notifications.create(user:               user,
    actor:              notification_actor,
    url:                notification_url,
    translation_values: notification_translation_values)
  end

  private

  def notification_actor
    eventable.inviter
  end

  def mailer
    UserMailer
  end
end
```

Fix user added to group notification
user
```ruby
class Events::UserAddedToGroup < Event
  include Events::EmailUser
  include Events::NotifyUser

  def self.publish!(membership, inviter, message = nil)
    bulk_publish!(Array(membership), inviter, message).first
  end

  def self.bulk_publish!(memberships, inviter, message = nil)
    memberships.map do |membership|
      new(
        kind: 'user_added_to_group',
        user: inviter,
        eventable: membership,
        custom_fields: { message: message }
      )
    end.tap do |events|
      import(events)
      events.map { |event| EventBus.broadcast('user_added_to_group_event', event) }
    end
  end

  def email_users!
    mailer.send(kind, eventable.user, self, custom_fields['message']).deliver_now
  end

  private

  def notification_recipients
    User.where(id: eventable.user_id)
  end

  def notification_actor
    eventable.inviter
  end

  def mailer
    UserMailer
  end
end
```
assistant