class-gravityview-plugin-hooks-acf.php

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<?php
/**
 * Add Advanced Custom Fields customizations
 *
 * @file      class-gravityview-plugin-hooks-acf.php
 * @package   GravityView
 * @license   GPL2+
 * @author    GravityView <[email protected]>
 * @link      http://gravityview.co
 * @copyright Copyright 2015, Katz Web Services, Inc.
 *
 * @since 1.16.5
 */

/**
 * @inheritDoc
 * @since 1.16.5
 */
class GravityView_Plugin_Hooks_ACF extends GravityView_Plugin_and_Theme_Hooks {

    /**
     * @inheritDoc
     * @since 1.16.5
     */
    protected $function_name = 'acf';

    /**
     * @since 1.22.2.1
     */
    protected $class_name = 'acf';

    /**
     * @since 2.2
     * @var array
     */
    protected $style_handles = array( 'acf-global' );

    /**
     * @since 1.16.5
     */
    protected function add_hooks() {
        parent::add_hooks();

        add_filter( 'gravityview/view_collection/from_post/meta_keys', array( $this, 'add_meta_keys_from_post' ), 10, 2 );

        $this->fix_posted_fields();
    }

    /**
     * @param array $meta_keys Existing meta keys to parse for [gravityview] shortcode
     * @param \WP_Post $post Current post ID
     *
     * @return array
     */
    function add_meta_keys_from_post( $meta_keys = array(), $post = null ) {

        // Can never be too careful: double-check that ACF is active and the function exists
        if ( ! function_exists( 'get_field_objects' ) ) {
            return $meta_keys;
        }

        $acf_keys = get_field_objects( $post->ID, array( 'load_value' => false ) );

        if( $acf_keys ) {
            return array_merge( array_keys( $acf_keys ), $meta_keys );
        }

        return $meta_keys;
    }

    /**
     * ACF needs $_POST['fields'] to be an array. GV supports both serialized array and array, so we just process earlier.
     *
     * @since 1.16.5
     *
     * @return void
     */
    private function fix_posted_fields() {
        if( is_admin() && isset( $_POST['action'] ) && isset( $_POST['post_type'] ) ) {
            if( 'editpost' === $_POST['action'] && 'gravityview' === $_POST['post_type'] ) {
                $_POST['fields'] = _gravityview_process_posted_fields();
            }
        }
    }
}

new GravityView_Plugin_Hooks_ACF;