Viewing file:  class.photocrati_transient_manager.php (4.08 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
class C_Photocrati_Transient_Manager
{
private $_groups = array();
static $_instance = NULL;
/**
* @return C_Photocrati_Transient_Manager
*/
static function get_instance()
{
if (!self::$_instance) {
$klass = get_class();
self::$_instance = new $klass;
}
return self::$_instance;
}
function __construct()
{
global $_wp_using_ext_object_cache;
$this->_groups = get_option('ngg_transient_groups', array('__counter' => 1));
if ($_wp_using_ext_object_cache) $this->_tracker = get_option('photocrati_cache_tracker', array());
register_shutdown_function(array(&$this, '_update_tracker'));
}
function delete_tracked($group=NULL)
{
global $_wp_using_ext_object_cache;
if ($_wp_using_ext_object_cache) {
if ($group) {
if (is_array($this->_tracker) && isset($this->_tracker[$this->get_group_id($group)])) {
foreach ($this->_tracker[$this->get_group_id($group)] as $key) {
delete_transient($this->get_group_id($group).'__'.$key);
}
unset($this->_tracker[$this->get_group_id($group)]);
}
}
else foreach($this->_groups as $group => $data) $this->delete_tracked($group);
}
}
function _update_tracker()
{
global $_wp_using_ext_object_cache;
if ($_wp_using_ext_object_cache) {
delete_option('photocrati_cache_tracker');
add_option('photocrati_cache_tracker', $this->_tracker, '', 'no');
}
}
function add_group($group_or_groups)
{
$updated = FALSE;
$groups = is_array($group_or_groups) ? $group_or_groups : array($group_or_groups);
foreach ($groups as $group) {
if (!isset($this->_groups[$group])) {
$id = $this->_groups['__counter'] += 1;
$this->_groups[$group] = array('id' => $id, 'enabled' => TRUE);
$updated = TRUE;
}
}
if ($updated) update_option('ngg_transient_groups', $this->_groups);
}
function get_group_id($group_name)
{
$this->add_group($group_name);
return $this->_groups[$group_name]['id'];
}
function generate_key($group, $params=array())
{
if (is_object($params)) $params = (array) $params;
if (is_array($params)) {
foreach ($params as &$param) $param = @json_encode($param);
$params = implode('', $params);
}
return $this->get_group_id($group).'__'.str_replace('-', '_', crc32($params));
}
function get($key, $default=NULL, $lookup=NULL)
{
$retval = $default;
if (is_null($lookup)) {
if (defined('PHOTOCRATI_CACHE')) {
$lookup = PHOTOCRATI_CACHE;
}
}
if ($lookup) {
$retval = json_decode(get_transient($key));
if (is_object($retval)) $retval = (array) $retval;
if (is_null($retval)) $retval = $default;
}
return $retval;
}
function _track_key($key)
{
global $_wp_using_ext_object_cache;
if ($_wp_using_ext_object_cache) {
$parts = explode('__', $key);
$group = $parts[0];
$id = $parts[1];
if (!isset($this->_tracker[$group])) $this->_tracker[$group] = array();
$this->_tracker[$group][] = $id;
}
}
function set($key, $value, $ttl=0)
{
$retval = FALSE;
$enabled = TRUE;
if (defined('PHOTOCRATI_CACHE')) $enabled = PHOTOCRATI_CACHE;
if (defined('PHOTOCRATI_CACHE_TTL') && !$ttl) $ttl = PHOTOCRATI_CACHE_TTL;
if ($enabled) {
$retval = set_transient($key, json_encode($value), $ttl);
if ($retval) $this->_track_key($key);
}
return $retval;
}
function delete($key)
{
return delete_transient($key);
}
function clear($group=NULL)
{
if (is_string($group) && !empty($group))
{
global $wpdb;
$query = "DELETE FROM {$wpdb->options} WHERE option_name LIKE '_transient%' AND option_name LIKE '%{$this->get_group_id($group)}__%'";
$wpdb->query($query);
$this->delete_tracked($group);
}
else foreach ($this->_groups as $name => $params) {
$this->clear($name);
}
}
static function update($key, $value, $ttl=NULL)
{
return self::get_instance()->set($key, $value, $ttl);
}
static function fetch($key, $default=NULL)
{
return self::get_instance()->get($key, $default);
}
static function flush($group=NULL)
{
return self::get_instance()->clear($group);
}
static function create_key($group, $params=array())
{
return self::get_instance()->generate_key($group, $params);
}
}
|