Current File : /home/opti/www/stlc/wp-content/plugins/shortpixel-image-optimiser/class/Model/CacheModel.php
<?php
namespace ShortPixel\Model;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
use ShortPixel\ShortPixelLogger\ShortPixelLogger as Log;
/* Model for storing cached data
*
* Use this in conjunction with cache controller, don't call it stand-alone.
*/
class CacheModel
{
protected $name;
protected $value;
protected $expires = HOUR_IN_SECONDS; // This is the expires, when saved without SetExpires! This value is not a representation of any expire time when loading something cache!
protected $exists = false;
public function __construct($name)
{
$this->name = $name;
$this->load();
}
/** Set the expiration of this item. In seconds
* @param $time Expiration in Seconds
*/
public function setExpires($time)
{
$this->expires = $time;
}
public function setValue($value)
{
$this->value = $value;
}
public function exists()
{
return $this->exists;
}
public function getValue()
{
return $this->value;
}
public function getName()
{
return $this->name;
}
public function save()
{
if ($this->expires <= 0)
{
return; // don't save transients without expiration
}
$this->exists = set_transient($this->name, $this->value, $this->expires);
}
public function delete()
{
delete_transient($this->name);
$this->exists = false;
}
protected function load()
{
$item = get_transient($this->name);
if ($item !== false)
{
$this->value = $item;
$this->exists = true;
$this->checkExpiration($this->name);
}
}
/** It has been shown that sometimes the expire of the transient is lost, creating a persistent transient. This can be harmful, especially in the case of bulk-secret which can create a situation were no client will optimize due to the hanging transient. */
private function checkExpiration($name)
{
$option = get_option('_transient_timeout_' . $name);
if (false !== $option && is_numeric($option))
{
return true; // ok
}
else {
// Via object cache the expire info can't be retrieved. Customer is on it's own with this.
if (wp_using_ext_object_cache())
{
return true;
}
$this->value = '';
$this->delete();
Log::addError('Found hanging transient with no expiration! ' . $name, $option);
}
}
}
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