/**
* the singleton pattern
*
* @return Phone_Backend_Asterisk
*/
public static function getInstance($_url, $_username, $_password)
{
if (self::$_instance === NULL) {
self::$_instance = new Phone_Backend_Asterisk($_url, $_username, $_password);
}
return self::$_instance;
}
/**
* factory function to return a selected phone backend class
*
* @param string $_type
* @return Phone_Backend_Interface
* @throws Phone_Exception_InvalidArgument
* @throws Phone_Exception_NotFound
*/
public static function factory($_type)
{
switch ($_type) {
case self::ASTERISK:
if (!isset(self::$_backends[$_type])) {
if (isset(Tinebase_Core::getConfig()->asterisk)) {
$asteriskConfig = Tinebase_Core::getConfig()->asterisk;
$url = $asteriskConfig->managerbaseurl;
$username = $asteriskConfig->managerusername;
$password = $asteriskConfig->managerpassword;
} else {
throw new Phone_Exception_NotFound('No settings found for asterisk backend in config file!');
}
self::$_backends[$_type] = Phone_Backend_Asterisk::getInstance($url, $username, $password);
}
$instance = self::$_backends[$_type];
break;
case self::CALLHISTORY:
if (!isset(self::$_backends[$_type])) {
self::$_backends[$_type] = new Phone_Backend_Snom_Callhistory();
}
$instance = self::$_backends[$_type];
break;
case self::SNOM_WEBSERVER:
if (!isset(self::$_backends[$_type])) {
self::$_backends[$_type] = new Phone_Backend_Snom_Webserver();
}
$instance = self::$_backends[$_type];
break;
default:
throw new Phone_Exception_InvalidArgument('Unsupported phone backend (' . $_type . ').');
}
return $instance;
}
