private function get_notification_settings( $controller ) {

		$settings = array();

		// Setup vars.
		$type  = llms_filter_input_sanitize_string( INPUT_GET, 'type' );
		$types = $controller->get_supported_types();
		$title = $controller->get_title() . ' (' . $types[ $type ] . ')';
		$view  = $controller->get_mock_view( $type );

		// So the merge code button can use it.
		$this->view = $view;

		// Output the merge code button for the WYSIWYG editor.
		add_action( 'media_buttons', array( $this, 'merge_code_button' ) );

		// Add a breadcrumb on the top of the page.
		$settings[] = $this->get_breadcrumbs( $title );

		// Add field options for the view.
		$settings = array_merge( $settings, $view->get_field_options( $type ) );

		$subscribers = $controller->get_subscriber_options( $type );

		foreach ( $subscribers as $i => $data ) {

			$sub_settings = array(
				'default' => $data['enabled'],
				'desc'    => $data['title'],
				'id'      => sprintf( '%1$s[%2$s]', $controller->get_option_name( $type . '_subscribers' ), $data['id'] ),
				'type'    => 'checkbox',
			);

			if ( 0 === $i ) {
				$sub_settings['title']         = __( 'Subscribers', 'lifterlms' );
				$sub_settings['checkboxgroup'] = 'start';
			} elseif ( count( $subscribers ) - 1 === $i ) {
				$sub_settings['checkboxgroup'] = 'end';
			} else {
				$sub_settings['checkboxgroup'] = 'middle';
			}

			$settings[] = $sub_settings;

			if ( 'custom' === $data['id'] ) {
				$settings[] = array(
					'desc' => $data['description'],
					'id'   => $controller->get_option_name( $type . '_custom_subscribers' ),
					'type' => 'text',
				);
			}
		}

		// Add additional controller options.
		$settings = array_merge( $settings, $controller->get_additional_options( $type ) );

		if ( $controller->is_testable( $type ) ) {
			foreach ( $controller->get_test_settings( $type ) as $setting ) {
				$setting['id'] = 'llms_notification_test_data[' . $setting['id'] . ']';
				$settings[]    = $setting;
			}
		}

		return apply_filters( 'llms_notification_settings_' . $controller->id . '_' . $type, $settings, $controller, $view );

	}