adding filter for advanced custom fields

adding page ancestor filter to custom fields plugin

diff --git a/functions.php b/functions.php
index 7195fed..47a0bea 100644 (file)
--- a/functions.php
+++ b/functions.php
@@ -30,4 +30,118 @@ define("ECONOMIC_BLOCKS", 4327);
 
 define("DEFAULT_BLOCKS", 24);
 define("DEFAULT_SLIDER", 21);
-?>
\ No newline at end of file
+?>
+<?php
+/**
+ * Core Functionality Plugin
+ * 
+ * @package    CoreFunctionality
+ * @since      1.0.0
+ * @copyright  Copyright (c) 2014, Bill Erickson & Jared Atchison
+ * @license    GPL-2.0+
+ */
+/**
+ * ACF Rule Type: Page Ancestor
+ *
+ * @author Bill Erickson
+ * @see http://www.billerickson.net/acf-custom-location-rules
+ *
+ * @param array $choices, all of the available rule types
+ * @return array
+ */
+function ea_acf_rule_type_page_ancestor( $choices ) {
+       $choices['Page']['page_ancestor'] = 'Page Ancestor';
+       return $choices;
+}
+add_filter( 'acf/location/rule_types', 'ea_acf_rule_type_page_ancestor' );
+/**
+ * ACF Rule Values: Page Ancestor
+ *
+ * @author Bill Erickson
+ * @see http://www.billerickson.net/acf-custom-location-rules
+ *
+ * @param array $choices, available rule values for this type
+ * @return array
+ */
+function ea_acf_rule_values_page_ancestor( $choices ) {
+       // Copied from acf/core/controllers/field_group.php
+       // @see https://github.com/elliotcondon/acf/blob/8ffdf88889c8c81e7f628e8e1ef95c6de17eb02d/core/controllers/field_group.php#L580
+       
+       $post_type = 'page';
+       $posts = get_posts(array(
+               'posts_per_page'                        =>      -1,
+               'post_type'                                     => $post_type,
+               'orderby'                                       => 'menu_order title',
+               'order'                                         => 'ASC',
+               'post_status'                           => 'any',
+               'suppress_filters'                      => false,
+               'update_post_meta_cache'        => false,
+       ));
+       
+       if( $posts )
+       {
+               // sort into hierachial order!
+               if( is_post_type_hierarchical( $post_type ) )
+               {
+                       $posts = get_page_children( 0, $posts );
+               }
+               
+               foreach( $posts as $page )
+               {
+                       $title = '';
+                       $ancestors = get_ancestors($page->ID, 'page');
+                       if($ancestors)
+                       {
+                               foreach($ancestors as $a)
+                               {
+                                       $title .= '- ';
+                               }
+                       }
+                       
+                       $title .= apply_filters( 'the_title', $page->post_title, $page->ID );
+                       
+                       
+                       // status
+                       if($page->post_status != "publish")
+                       {
+                               $title .= " ($page->post_status)";
+                       }
+                       
+                       $choices[ $page->ID ] = $title;
+                       
+               }
+       
+       }
+       
+       return $choices;
+}
+add_filter( 'acf/location/rule_values/page_ancestor', 'ea_acf_rule_values_page_ancestor' );
+/**
+ * ACF Rule Match: Page Ancestor
+ *
+ * @author Bill Erickson
+ * @see http://www.billerickson.net/acf-custom-location-rules
+ *
+ * @param boolean $match, whether the rule matches (true/false)
+ * @param array $rule, the current rule you're matching. Includes 'param', 'operator' and 'value' parameters
+ * @param array $options, data about the current edit screen (post_id, page_template...)
+ * @return boolean $match
+ */
+function ea_acf_rule_match_page_ancestor( $match, $rule, $options ) {
+       
+       if ( ! $options['post_id'] || 'page' !== get_post_type( $options['post_id'] ) )
+               return false;
+               
+       $ancestors = get_ancestors( $options['post_id'], 'page' );
+       $is_ancestor = in_array( $rule['value'], $ancestors );
+       
+       if ( '==' == $rule['operator'] ) { 
+               $match = $is_ancestor;
+       
+       } elseif ( '!=' == $rule['operator'] ) {
+               $match = ! $is_ancestor;
+       }
+       
+       return $match;
+}
+add_filter( 'acf/location/rule_match/page_ancestor', 'ea_acf_rule_match_page_ancestor', 10, 3 );
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