CaffGeek/MBACNationals

<?php
/**
 * Meta API
 *
 * Functions for retrieving and manipulating metadata
 *
 * @package WordPress
 * @subpackage Meta
 * @since 2.9.0
 */

function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = false) {
    if ( !$meta_type || !$meta_key )
        return false;

    if ( ! $table = _get_meta_table($meta_type) )
        return false;

    global $wpdb;

    $column = esc_sql($meta_type . '_id');

    // expected_slashed ($meta_key)
    $meta_key = stripslashes($meta_key);

    if ( $unique && $wpdb->get_var( $wpdb->prepare(
        "SELECT COUNT(*) FROM $table WHERE meta_key = %s AND $column = %d",
        $meta_key, $object_id ) ) )
        return false;

    $meta_value = maybe_serialize( stripslashes_deep($meta_value) );

    $wpdb->insert( $table, array(
        $column => $object_id,
        'meta_key' => $meta_key,
        'meta_value' => $meta_value
    ) );

    wp_cache_delete($object_id, $meta_type . '_meta');

    do_action( "added_{$meta_type}_meta", $wpdb->insert_id, $object_id, $meta_key, $meta_value );

    return true;
}

function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_value = '') {
    if ( !$meta_type || !$meta_key )
        return false;

    if ( ! $table = _get_meta_table($meta_type) )
        return false;

    global $wpdb;

    $column = esc_sql($meta_type . '_id');
    $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';

    // expected_slashed ($meta_key)
    $meta_key = stripslashes($meta_key);

    if ( ! $meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) )
        return add_metadata($meta_type, $object_id, $meta_key, $meta_value);

    $meta_value = maybe_serialize( stripslashes_deep($meta_value) );

    $data  = compact( 'meta_value' );
    $where = array( $column => $object_id, 'meta_key' => $meta_key );

    if ( !empty( $prev_value ) ) {
        $prev_value = maybe_serialize($prev_value);
        $where['meta_value'] = $prev_value;
    }

    do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );

    $wpdb->update( $table, $data, $where );
    wp_cache_delete($object_id, $meta_type . '_meta');

    do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value );

    return true;
}

function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $delete_all = false) {
    if ( !$meta_type || !$meta_key || (!$delete_all && ! (int)$object_id) )
        return false;

    if ( ! $table = _get_meta_table($meta_type) )
        return false;

    global $wpdb;

    $type_column = esc_sql($meta_type . '_id');
    $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
    // expected_slashed ($meta_key)
    $meta_key = stripslashes($meta_key);
    $meta_value = maybe_serialize( stripslashes_deep($meta_value) );

    $query = $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s", $meta_key );

    if ( !$delete_all )
        $query .= $wpdb->prepare(" AND $type_column = %d", $object_id );

    if ( $meta_value )
        $query .= $wpdb->prepare(" AND meta_value = %s", $meta_value );

    $meta_ids = $wpdb->get_col( $query );
    if ( !count( $meta_ids ) )
        return false;

    $query = "DELETE FROM $table WHERE $id_column IN( " . implode( ',', $meta_ids ) . " )";

    $count = $wpdb->query($query);

    if ( !$count )
        return false;

    wp_cache_delete($object_id, $meta_type . '_meta');

    do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $meta_value );

    return true;
}

function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) {
    if ( !$meta_type )
        return false;

    $meta_cache = wp_cache_get($object_id, $meta_type . '_meta');

    if ( !$meta_cache ) {
        update_meta_cache($meta_type, $object_id);
        $meta_cache = wp_cache_get($object_id, $meta_type . '_meta');
    }

    if ( ! $meta_key )
        return $meta_cache;

    if ( isset($meta_cache[$meta_key]) ) {
        if ( $single ) {
            return maybe_unserialize( $meta_cache[$meta_key][0] );
        } else {
            return array_map('maybe_unserialize', $meta_cache[$meta_key]);
        }
    }

    if ($single)
        return '';
    else
        return array();
}

function update_meta_cache($meta_type, $object_ids) {
    if ( empty( $meta_type ) || empty( $object_ids ) )
        return false;

    if ( ! $table = _get_meta_table($meta_type) )
        return false;

    $column = esc_sql($meta_type . '_id');

    global $wpdb;

    if ( !is_array($object_ids) ) {
        $object_ids = preg_replace('|[^0-9,]|', '', $object_ids);
        $object_ids = explode(',', $object_ids);
    }

    $object_ids = array_map('intval', $object_ids);

    $cache_key = $meta_type . '_meta';
    $ids = array();
    foreach ( $object_ids as $id ) {
        if ( false === wp_cache_get($id, $cache_key) )
            $ids[] = $id;
    }

    if ( empty( $ids ) )
        return false;

    // Get meta info
    $id_list = join(',', $ids);
    $cache = array();
    $meta_list = $wpdb->get_results( $wpdb->prepare("SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list)",
        $meta_type), ARRAY_A );

    if ( !empty($meta_list) ) {
        foreach ( $meta_list as $metarow) {
            $mpid = intval($metarow[$column]);
            $mkey = $metarow['meta_key'];
            $mval = $metarow['meta_value'];

            // Force subkeys to be array type:
            if ( !isset($cache[$mpid]) || !is_array($cache[$mpid]) )
                $cache[$mpid] = array();
            if ( !isset($cache[$mpid][$mkey]) || !is_array($cache[$mpid][$mkey]) )
                $cache[$mpid][$mkey] = array();

            // Add a value to the current pid/key:
            $cache[$mpid][$mkey][] = $mval;
        }
    }

    foreach ( $ids as $id ) {
        if ( ! isset($cache[$id]) )
            $cache[$id] = array();
    }

    foreach ( array_keys($cache) as $object)
        wp_cache_set($object, $cache[$object], $cache_key);

    return $cache;
}

function _get_meta_table($type) {
    global $wpdb;

    $table_name = $type . 'meta';

    if ( empty($wpdb->$table_name) )
        return false;

    return $wpdb->$table_name;
}
?>