woothemes/woocommerce

<?php
/**
 * Blocks Utils
 *
 * Used by core components that need to work with blocks.
 *
 * @package WooCommerce\Blocks\Utils
 * @version 5.0.0
 */

defined( 'ABSPATH' ) || exit;

/**
 * Blocks Utility class.
 */
class WC_Blocks_Utils {

    /**
     * Get blocks from a woocommerce page.
     *
     * @param string $woo_page_name A woocommerce page e.g. `checkout` or `cart`.
     * @return array Array of blocks as returned by parse_blocks().
     */
    private static function get_all_blocks_from_page( $woo_page_name ) {
        $page_id = wc_get_page_id( $woo_page_name );

        $page = get_post( $page_id );
        if ( ! $page ) {
            return array();
        }

        $blocks = parse_blocks( $page->post_content );
        if ( ! $blocks ) {
            return array();
        }

        return $blocks;
    }

    /**
     * Get all instances of the specified block on a specific woo page
     * (e.g. `cart` or `checkout` page).
     *
     * @param string $block_name The name (id) of a block, e.g. `woocommerce/cart`.
     * @param string $woo_page_name The woo page to search, e.g. `cart`.
     * @return array Array of blocks as returned by parse_blocks().
     */
    public static function get_blocks_from_page( $block_name, $woo_page_name ) {
        $page_blocks = self::get_all_blocks_from_page( $woo_page_name );

        // Get any instances of the specified block.
        return array_values(
            array_filter(
                $page_blocks,
                function ( $block ) use ( $block_name ) {
                    return ( $block_name === $block['blockName'] );
                }
            )
        );
    }

    /**
     * Check if a given page contains a particular block.
     *
     * @param int|WP_Post $page Page post ID or post object.
     * @param string      $block_name The name (id) of a block, e.g. `woocommerce/cart`.
     * @return bool Boolean value if the page contains the block or not. Null in case the page does not exist.
     */
    public static function has_block_in_page( $page, $block_name ) {
        $page_to_check = get_post( $page );
        if ( null === $page_to_check ) {
            return false;
        }

        $blocks = parse_blocks( $page_to_check->post_content );
        foreach ( $blocks as $block ) {
            if ( $block_name === $block['blockName'] ) {
                return true;
            }
        }

        return false;
    }
}