Forked from Hube2/acf-page-ancestor-location-rule.php
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May 9, 2016 13:03
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Advanced Custom Fields - Page Ancestor Custom Location Rule
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<?php | |
/* | |
ACF custom location rule : Page Ancestor | |
*/ | |
add_filter('acf/location/rule_types', 'acf_location_rules_page_ancestor'); | |
function acf_location_rules_page_ancestor($choices) { | |
$choices['Page']['page_ancestor'] = 'Page Ancestor'; | |
return $choices; | |
} | |
add_filter('acf/location/rule_values/page_ancestor', 'acf_location_rules_values_page_ancestor'); | |
function acf_location_rules_values_page_ancestor($choices) { | |
// this code is copied directly from | |
// render_location_values() | |
// case "page" | |
$groups = acf_get_grouped_posts(array( | |
'post_type' => 'page' | |
)); | |
if (!empty($groups)) { | |
foreach(array_keys($groups) as $group_title) { | |
$posts = acf_extract_var($groups, $group_title); | |
foreach(array_keys($posts) as $post_id) { | |
$posts[$post_id] = acf_get_post_title($posts[$post_id]); | |
}; | |
$choices = $posts; | |
} | |
} | |
// end of copy from ACF | |
return $choices; | |
} | |
add_filter('acf/location/rule_match/page_ancestor', 'acf_location_rules_match_page_ancestor', 10, 3); | |
function acf_location_rules_match_page_ancestor($match, $rule, $options) { | |
// this code is with inspiration from | |
// acf_location::rule_match_page_parent() | |
// check parents recursively to see if any | |
// matches the location value | |
if (isset($options['page_parent']) && $options['page_parent']) { | |
$page_parent = $options['page_parent']; | |
unset($options['page_parent']); | |
} elseif (isset($options['post_id']) && $options['post_id']) { | |
$post = get_post($options['post_id']); | |
$page_parent = $post->post_parent; | |
} else { | |
$page_parent = false; | |
} | |
$ancestors = array(); | |
if ($page_parent) { | |
$ancestors = get_ancestors($page_parent, 'page'); | |
$ancestors[] = $page_parent; | |
} | |
if ($rule['operator'] == "==") { | |
$match = in_array($rule['value'], $ancestors); | |
} elseif ($rule['operator'] == "!=") { | |
$match = !in_array($rule['value'], $ancestors); | |
} | |
return $match; | |
} | |
?> |
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