41 lines
974 B
PHP
41 lines
974 B
PHP
<?php
|
|
|
|
namespace SilverStripe\VersionFeed\Filters;
|
|
|
|
use SilverStripe\Core\Config\Config;
|
|
|
|
/**
|
|
* Caches results of a callback
|
|
*/
|
|
class CachedContentFilter extends ContentFilter
|
|
{
|
|
|
|
/**
|
|
* Enable caching
|
|
*
|
|
* @config
|
|
* @var boolean
|
|
*/
|
|
private static $cache_enabled = true;
|
|
|
|
public function getContent($key, $callback)
|
|
{
|
|
$cache = $this->getCache();
|
|
|
|
// Return cached value if available
|
|
$cacheEnabled = Config::inst()->get(get_class(), 'cache_enabled');
|
|
$result = (isset($_GET['flush']) || !$cacheEnabled)
|
|
? null
|
|
: $cache->get($key);
|
|
if ($result) {
|
|
return $result;
|
|
}
|
|
|
|
// Fallback to generate result
|
|
$result = parent::getContent($key, $callback);
|
|
$lifetime = Config::inst()->get(ContentFilter::class, 'cache_lifetime') ?: null;
|
|
$cache->set($key, $result, $lifetime);
|
|
return $result;
|
|
}
|
|
}
|