/**
* Get singleton instance
*
* @access public
* @return object Singleton instance
*/
public static function getInstance()
{
// optionally create new instance
if (!self::$instance) {
self::$instance = new KocujSitemapPluginSitemap();
}
// exit
return self::$instance;
}
/**
* Constructor
*
* @access private
* @return void
*/
private function __construct()
{
// get plugin directory
$this->pluginDir = dirname(__FILE__);
$this->pluginUrl = plugins_url('kocuj-sitemap');
// initialize classes
global $classKocujSitemapAdmin;
$classKocujSitemapConfig = new KocujSitemapPluginConfig();
$classKocujSitemapAdmin = new KocujSitemapPluginAdmin($classKocujSitemapConfig, dirname(__FILE__) . '/languages', __FILE__, 'kocuj-sitemap', dirname(plugin_basename(__FILE__)) . '/languages', $this->getVersion());
KocujSitemapPluginCache::getInstance();
KocujSitemapPluginSitemap::getInstance();
// add initialize
add_action('init', array($this, 'init'));
}
/**
* Create cache
*
* @access public
* @return bool Status - true or false
*/
public function createCache()
{
// remove all cache files
$cacheDir = $this->getCacheDirectory();
$dir = opendir($cacheDir);
while ($item = readdir($dir)) {
if (is_file($cacheDir . '/' . $item) && substr($item, strlen($item) - 4, 4) == '.dat') {
@unlink($cacheDir . '/' . $item);
}
}
// get all languages
$langs = KocujSitemapPluginMultiLang::getInstance()->getLanguages();
// create cached sitemap for each language
$this->cacheContent = array();
if (!empty($langs)) {
foreach ($langs as $lang) {
// create sitemap
$array = KocujSitemapPluginSitemap::getInstance()->createSitemap($lang);
// set cache content in memory
$this->cacheContent[$lang] = $array;
// check if cache directory is writable
if (!$this->checkWritable()) {
return false;
}
// set filename
$filename = $this->getCacheFilename($lang);
if (empty($filename)) {
return false;
}
// save cache
@unlink($filename);
$file = @fopen($filename, 'w');
@flock($file, LOCK_EX);
if (empty($file)) {
@flock($file, LOCK_UN);
@fclose($file);
return false;
}
if (fwrite($file, maybe_serialize($array)) === false) {
@flock($file, LOCK_UN);
@fclose($file);
return false;
}
@flock($file, LOCK_UN);
if (@fclose($file) === false) {
return false;
}
}
}
// exit
return true;
}
