109 lines
2.3 KiB
PHP
109 lines
2.3 KiB
PHP
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<?php
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namespace ShortPixel\Model;
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if ( ! defined( 'ABSPATH' ) ) {
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exit; // Exit if accessed directly.
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}
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use ShortPixel\ShortPixelLogger\ShortPixelLogger as Log;
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/* Model for storing cached data
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*
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* Use this in conjunction with cache controller, don't call it stand-alone.
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*/
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class CacheModel
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{
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protected $name;
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protected $value;
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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!
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protected $exists = false;
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public function __construct($name)
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{
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$this->name = $name;
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$this->load();
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}
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/** Set the expiration of this item. In seconds
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* @param $time Expiration in Seconds
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*/
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public function setExpires($time)
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{
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$this->expires = $time;
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}
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public function setValue($value)
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{
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$this->value = $value;
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}
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public function exists()
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{
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return $this->exists;
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}
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public function getValue()
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{
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return $this->value;
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}
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public function getName()
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{
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return $this->name;
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}
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public function save()
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{
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if ($this->expires <= 0)
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{
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return; // don't save transients without expiration
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}
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$this->exists = set_transient($this->name, $this->value, $this->expires);
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}
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public function delete()
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{
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delete_transient($this->name);
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$this->exists = false;
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}
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protected function load()
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{
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$item = get_transient($this->name);
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if ($item !== false)
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{
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$this->value = $item;
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$this->exists = true;
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$this->checkExpiration($this->name);
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}
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}
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/** 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. */
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private function checkExpiration($name)
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{
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$option = get_option('_transient_timeout_' . $name);
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if (false !== $option && is_numeric($option))
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{
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return true; // ok
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}
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else {
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// Via object cache the expire info can't be retrieved. Customer is on it's own with this.
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if (wp_using_ext_object_cache())
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{
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return true;
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}
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$this->value = '';
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$this->delete();
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Log::addError('Found hanging transient with no expiration! ' . $name, $option);
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}
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}
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}
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