/**
* Finds the proper locale based on the input
* Checks if it exists, degrades it when necessary
* Detects registry locale and when all fails tries to detect a automatic locale
* Returns the found locale as string
*
* @param string $locale
* @throws IfwPsn_Vendor_Zend_Locale_Exception When the given locale is no locale or the autodetection fails
* @return string
*/
public static function findLocale($locale = null)
{
if ($locale === null) {
require_once IFW_PSN_LIB_ROOT . 'IfwPsn/Vendor/Zend/Registry.php';
if (IfwPsn_Vendor_Zend_Registry::isRegistered('IfwPsn_Vendor_Zend_Locale')) {
$locale = IfwPsn_Vendor_Zend_Registry::get('IfwPsn_Vendor_Zend_Locale');
}
}
if ($locale === null) {
$locale = new IfwPsn_Vendor_Zend_Locale();
}
if (!IfwPsn_Vendor_Zend_Locale::isLocale($locale, true, false)) {
if (!IfwPsn_Vendor_Zend_Locale::isLocale($locale, false, false)) {
$locale = IfwPsn_Vendor_Zend_Locale::getLocaleToTerritory($locale);
if (empty($locale)) {
require_once IFW_PSN_LIB_ROOT . 'IfwPsn/Vendor/Zend/Locale/Exception.php';
throw new IfwPsn_Vendor_Zend_Locale_Exception("The locale '{$locale}' is no known locale");
}
} else {
$locale = new IfwPsn_Vendor_Zend_Locale($locale);
}
}
$locale = self::_prepareLocale($locale);
return $locale;
}
