/**
* Constructor
*
* @access private
* @return void
*/
private function __construct()
{
// set list of all multi-languages plugins classes
$this->classes = array(array('dir' => KocujSitemapPlugin::getInstance()->getPluginDir() . '/classes/multilang/qtranslate.class.php', 'class' => 'kocujsitemap_qtranslate', 'original' => true));
// get list of additional multi-languages plugins classes
$additionalMultiLangClasses = apply_filters('kocujsitemap_additionalmultilangphpclasses', array());
if (!empty($additionalMultiLangClasses)) {
$ok = true;
foreach ($additionalMultiLangClasses as $val) {
if (!isset($val['dir']) || !isset($val['class'])) {
$ok = false;
}
}
if (!empty($ok)) {
$this->classes = array_merge($this->classes, $additionalMultiLangClasses);
foreach ($this->classes as $key => $val) {
$this->classes[$key]['original'] = false;
}
}
}
// load all classes
if (!empty($this->classes)) {
$methods = array('getInstance', 'getName', 'getLanguages', 'checkPluginAdmin', 'checkPlugin', 'beforeGetBlogName', 'afterGetBlogName', 'getTranslatedBlogName', 'beforeGetHomeURL', 'afterGetHomeURL', 'getTranslatedHomeURL', 'beforeGetPages', 'afterGetPages', 'beforeGetPageItem', 'afterGetPageItem', 'getTranslatedPageURL', 'getTranslatedPageTitle', 'beforeGetPosts', 'afterGetPosts', 'beforeGetPostItem', 'afterGetPostItem', 'getTranslatedPostURL', 'getTranslatedPostTitle', 'beforeGetCategories', 'afterGetCategories', 'beforeGetCategoryItem', 'afterGetCategoryItem', 'getTranslatedCategoryURL', 'getTranslatedCategoryTitle', 'beforeGetMenu', 'afterGetMenu', 'beforeGetMenuItem', 'afterGetMenuItem', 'getTranslatedMenuURL', 'getTranslatedMenuTitle');
foreach ($this->classes as $key => $class) {
$ok = false;
if (file_exists($class['dir'])) {
include_once $class['dir'];
if (class_exists('KocujSitemapPluginMultiLang_' . $class['class'])) {
$ok = true;
eval('$instance = KocujSitemapPluginMultiLang_' . $class['class'] . '::getInstance();');
if (empty($class['original'])) {
foreach ($methods as $method) {
if (!method_exists($instance, $method)) {
$ok = false;
break;
}
}
}
if (!empty($ok)) {
$activeAdmin = $instance->checkPluginAdmin();
if (!empty($activeAdmin)) {
$name = $instance->getName();
$active = $instance->checkPlugin();
$this->data[$key] = array('instance' => $instance, 'active' => $active, 'admin_id' => 'MultiLang_' . $class['class'], 'admin_label' => sprintf(__('Use %s plugin', 'kocuj-sitemap'), $name), 'admin_description' => sprintf(__('Use %s plugin (if installed and activated) for multi-language websites; uncheck it only if you have any problems because of this setting', 'kocuj-sitemap'), $name));
} else {
$ok = false;
}
}
}
}
if (empty($ok)) {
unset($this->classes[$key]);
}
}
}
}
/**
* Get singleton instance
*
* @access public
* @return object Singleton instance
*/
public static function getInstance()
{
// optionally create new instance
if (!self::$instance) {
self::$instance = new KocujSitemapPlugin();
}
// exit
return self::$instance;
}
/**
* Get cache directory
*
* @access private
* @return string Cache directory
*/
private function getCacheDirectory()
{
// get cache directory
return KocujSitemapPlugin::getInstance()->getPluginDir() . '/cache';
}