shortcode-extended.php

<?php

/**
 * Shortcode Extended
 *
 * @package           ShortcodeExtended
 * @author            Chris Sparshott
 * @copyright         2022 Chris Sparshott
 * @license           GPL-2.0-or-later
 *
 * @wordpress-plugin
 * Plugin Name:       Shortcode Extended
 * Plugin URI:        https://github.com/seemly/shortcode-extended
 * Description:       Enable ACF custom field usage in Query Loop block
 * Version:           0.0.1
 * Requires at least: 5.2
 * Author:            Chris Sparshott
 * Author URI:        https://sparshott.co.uk
 * Text Domain:       shortcode-extended
 * License:           GPL v2 or later
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 */

if(!class_exists('ShortcodeExtended'))
{
  class ShortcodeExtended {
    protected $originalRenderCallback;
  
    public function __construct($originalRenderCallback = null) {
      $this->originalRenderCallback = $originalRenderCallback;
    }
  
    public function render($attributes, $content, $block) {
      // Failsafe
      if (!($block instanceof WP_Block)) {
        return $content;
      }
  
      // If no ACF or no shortcode found, defer to original callback
      if (!function_exists('get_field') || strpos($content, '[acf') === false) {
        return is_callable($this->originalRenderCallback)
          ? call_user_func($this->originalRenderCallback, $attributes, $content, $block)
          : $content;
      }
  
      // Apply shortcodes safely
      return do_shortcode($content);
    }
  }

  add_filter('register_block_type_args', function ($args, $name)
  {
    // Here we list the native blocks we are likely to include ACF shortcodes in.
    // This list probably needs to be expanded, but suits my immediate requirements.
    $validBlocks = ['core/shortcode', 'core/paragraph', 'core/list'];

    // override the native render_callback function to ensure ACF shortcodes run as expected.
    if(in_array($name, $validBlocks))
    {
      $args['render_callback'] = [new ShortcodeExtended, 'render'];
    }

    return $args;
  }, 10, 2);

}