*
	 * @var string
	 */
	public $title_size;

	/**
	 * Add actions attached to the render function action.
	 *
	 * @param   array  $attributes Optional. Block attributes. Default empty array.
	 * @param   string $content    Optional. Block content. Default empty string.
	 * @return  void
	 * @since   1.0.0
	 * @version 1.1.0
	 */
	public function add_hooks( $attributes = array(), $content = '' ) {

		$attributes = wp_parse_args(
			$attributes,
			array(
				'title'           => __( 'Course Information', 'lifterlms' ),
				'title_size'      => 'h3',
				'show_length'     => true,
				'show_difficulty' => true,
				'show_tracks'     => true,
				'show_cats'       => true,
				'show_tags'       => true,
			)
		);

		$show_wrappers = false;

		if ( $attributes['show_length'] ) {
			$show_wrappers = true;
			add_action( $this->get_render_hook(), 'lifterlms_template_single_length', 10 );
		}

		if ( $attributes['show_difficulty'] ) {
			$show_wrappers = true;
			add_action( $this->get_render_hook(), 'lifterlms_template_single_difficulty', 20 );
		}

		if ( $attributes['show_tracks'] ) {
			$show_wrappers = true;
			add_action( $this->get_render_hook(), 'lifterlms_template_single_course_tracks', 25 );
		}

		if ( $attributes['show_cats'] ) {
			$show_wrappers = true;
			add_action( $this->get_render_hook(), 'lifterlms_template_single_course_categories', 30 );
		}

		if ( $attributes['show_tags'] ) {
			$show_wrappers = true;
			add_action( $this->get_render_hook(), 'lifterlms_template_single_course_tags', 35 );
		}