<?php
/**
 * Shortcode that renders a template anywhere.
 *
 * @package HeadFoot
 */

namespace HeadFoot;

defined( 'ABSPATH' ) || exit;

/**
 * Registers [headfoot_template id="123"].
 *
 * The shortcode ignores the location rules of the template. It keeps the
 * user role rule, so a template for logged in users never reaches a visitor
 * through a shortcode.
 */
class Shortcode {

	const TAG = 'headfoot_template';

	/**
	 * Adds the shortcode.
	 */
	public function __construct() {
		add_shortcode( self::TAG, [ $this, 'render' ] );
	}

	/**
	 * Renders the template.
	 *
	 * @param array|string $atts Shortcode attributes.
	 * @return string
	 */
	public function render( $atts ) {
		$atts = shortcode_atts( [ 'id' => 0 ], $atts, self::TAG );
		$id   = absint( $atts['id'] );

		if ( ! self::can_render( $id ) ) {
			return '';
		}

		if ( class_exists( '\Elementor\Core\Files\CSS\Post' ) ) {
			$css = new \Elementor\Core\Files\CSS\Post( $id );
			$css->enqueue();
		}

		return Kses::filter( Renderer::get_content( $id ) );
	}

	/**
	 * Tells whether the current user can see the template through the shortcode.
	 *
	 * @param int $id Template ID.
	 * @return bool
	 */
	public static function can_render( $id ) {
		$id = absint( $id );

		if ( ! $id || Post_Type::POST_TYPE !== get_post_type( $id ) ) {
			return false;
		}

		if ( 'publish' !== get_post_status( $id ) && ! current_user_can( 'edit_post', $id ) ) {
			return false;
		}

		$roles = get_post_meta( $id, Post_Type::META_ROLES, true );

		return Rules::role_matches( is_array( $roles ) ? $roles : [] );
	}
}