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First pass commentmeta implementation. See #2659 props scribu.
git-svn-id: https://develop.svn.wordpress.org/trunk@11943 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Peter Westwood
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<?php
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/**
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* Meta API
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*
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* Functions for retrieving and manipulating metadata
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*
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* @package WordPress
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* @subpackage Meta
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* @since 2.9.0
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*/
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function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = false) {
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if ( !$meta_type || !$meta_key )
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return false;
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if ( ! $table = _get_meta_table($meta_type) )
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return false;
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global $wpdb;
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$column = esc_sql($meta_type . '_id');
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// expected_slashed ($meta_key)
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$meta_key = stripslashes($meta_key);
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if ( $unique && $wpdb->get_var( $wpdb->prepare(
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"SELECT COUNT(*) FROM $table WHERE meta_key = %s AND $column = %d",
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$meta_key, $object_id ) ) )
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return false;
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$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
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$wpdb->insert( $table, array(
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$column => $object_id,
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'meta_key' => $meta_key,
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'meta_value' => $meta_value
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) );
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wp_cache_delete($object_id, $meta_type . '_meta');
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do_action( "added_{$meta_type}_meta", $wpdb->insert_id, $object_id, $meta_key, $meta_value );
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return true;
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}
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function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_value = '') {
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if ( !$meta_type || !$meta_key )
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return false;
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if ( ! $table = _get_meta_table($meta_type) )
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return false;
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global $wpdb;
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$column = esc_sql($meta_type . '_id');
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// expected_slashed ($meta_key)
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$meta_key = stripslashes($meta_key);
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if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT meta_key FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) )
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return add_metadata($meta_type, $object_id, $meta_key, $meta_value);
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$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
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$data = compact( 'meta_value' );
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$where = array( $column => $object_id, 'meta_key' => $meta_key );
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if ( !empty( $prev_value ) ) {
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$prev_value = maybe_serialize($prev_value);
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$where['meta_value'] = $prev_value;
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}
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do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );
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$wpdb->update( $table, $data, $where );
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wp_cache_delete($object_id, $meta_type . '_meta');
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do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );
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return true;
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}
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function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '') {
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if ( !$meta_type || !$meta_key )
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return false;
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if ( ! $table = _get_meta_table($meta_type) )
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return false;
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global $wpdb;
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$column = esc_sql($meta_type . '_id');
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// expected_slashed ($meta_key)
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$meta_key = stripslashes($meta_key);
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$meta_value = maybe_serialize( stripslashes_deep($meta_value) );
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$query = $wpdb->prepare( "DELETE FROM $table WHERE meta_key = %s", $meta_key );
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if ( $meta_value )
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$query .= $wpdb->prepare("AND meta_value = %s", $meta_value );
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$count = $wpdb->query($query);
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if ( !$count )
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return false;
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wp_cache_delete($object_id, $meta_type . '_meta');
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do_action( "deleted_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );
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return true;
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}
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function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) {
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if ( !$meta_type )
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return false;
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$meta_cache = wp_cache_get($object_id, $meta_type . '_meta');
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if ( !$meta_cache ) {
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update_meta_cache($meta_type, $object_id);
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$meta_cache = wp_cache_get($object_id, $meta_type . '_meta');
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}
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if ( ! $meta_key )
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return $meta_cache;
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if ( isset($meta_cache[$meta_key]) ) {
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if ( $single ) {
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return maybe_unserialize( $meta_cache[$meta_key][0] );
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} else {
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return array_map('maybe_unserialize', $meta_cache[$meta_key]);
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}
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}
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return false;
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}
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function update_meta_cache($meta_type, $object_ids) {
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if ( empty( $meta_type ) || empty( $object_ids ) )
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return false;
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if ( ! $table = _get_meta_table($meta_type) )
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return false;
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$column = esc_sql($meta_type . '_id');
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global $wpdb;
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if ( !is_array($object_ids) ) {
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$object_ids = preg_replace('|[^0-9,]|', '', $object_ids);
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$object_ids = explode(',', $object_ids);
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}
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$object_ids = array_map('intval', $object_ids);
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$cache_key = $meta_type . '_meta';
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$ids = array();
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foreach ( $object_ids as $id ) {
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if ( false === wp_cache_get($id, $cache_key) )
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$ids[] = $id;
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}
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if ( empty( $ids ) )
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return false;
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// Get meta info
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$id_list = join(',', $ids);
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$cache = array();
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$meta_list = $wpdb->get_results( $wpdb->prepare("SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list)",
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$meta_type), ARRAY_A );
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if ( !empty($meta_list) ) {
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foreach ( $meta_list as $metarow) {
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$mpid = intval($metarow[$column]);
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$mkey = $metarow['meta_key'];
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$mval = $metarow['meta_value'];
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// Force subkeys to be array type:
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if ( !isset($cache[$mpid]) || !is_array($cache[$mpid]) )
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$cache[$mpid] = array();
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if ( !isset($cache[$mpid][$mkey]) || !is_array($cache[$mpid][$mkey]) )
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$cache[$mpid][$mkey] = array();
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// Add a value to the current pid/key:
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$cache[$mpid][$mkey][] = $mval;
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}
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}
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foreach ( $ids as $id ) {
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if ( ! isset($cache[$id]) )
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$cache[$id] = array();
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}
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foreach ( array_keys($cache) as $object)
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wp_cache_set($object, $cache[$object], $cache_key);
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return $cache;
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}
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function _get_meta_table($type) {
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global $wpdb;
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$table_name = $type . 'meta';
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if ( empty($wpdb->$table_name) )
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return false;
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return $wpdb->$table_name;
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}
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?>
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