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<?php defined('SYSPATH') or die('No direct script access.');
/*
* This file is part of open source system FreenetIS
* and it is released under GPLv3 licence.
*
* More info about licence can be found:
* http://www.gnu.org/licenses/gpl-3.0.html
*
* More info about project can be found:
* http://www.freenetis.org/
*
*/

/**
* Billing for VoIP
*
* @author Roman Sevcik, Ondrej Fibich
*/
class Billing
{
/**
* Singleton instance
*
* @var Billing
*/
private static $instance = null;
/**
* Returns instance of billing
*
* @return Billing
*/
public static function & instance()
{
if (empty(self::$instance))
{
self::$instance = new Billing();
}
return self::$instance;
}
// states of VoIP
const INACTIVE = 1;
const NFX_LBILLING = 2;
/**
* Indicator of driver
*
* @var bool
*/
private $driver;
/**
* LBilling class
*
* @var lbilling
*/
private $billing;

/**
* Construct of cilling
*/
private function __construct()
{
if (Settings::get('voip_billing_driver') == Billing::NFX_LBILLING)
{
require_once(APPPATH.'vendors/billing/lbilling/lbilling.php');
$this->billing = new lbilling(
Settings::get('voip_billing_partner'),
Settings::get('voip_billing_password')
);

$this->driver = true;
}
else
{
$this->driver = false;
}
}

/**
* Check if driver is on
*
* @return bool
*/
public function has_driver()
{
return $this->driver;
}

/**
* Tests connection to billing
*
* @return bool
*/
public function test_conn()
{
if (!$this->driver)
{
return false;
}

return $this->billing->test_conn();
}

/**
* Gets account
*
* @param integer $accountid
* @return mixed false on error, data otherwise
*/
public function get_account($accountid)
{
if (!$this->driver)
{
return false;
}

return $this->billing->get_account($accountid);
}

/**
* Gets calls from acount in given date interval
*
* @param integer $accountid
* @param string $from
* @param string $to
* @return mixed
*/
public function get_account_calls($accountid, $from, $to)
{
return $this->billing->get_account_calls($accountid, $from, $to);
}

/**
* Gets subscribers calls in given date interval
*
* @param integer $accountid
* @param string $from
* @param string $to
* @return mixed
*/
public function get_subscriber_calls($accountid, $from, $to)
{
return $this->billing->get_subscriber_calls($accountid, $from, $to);
}

/**
* Gets partner calls in given date interval
*
* @param integer $accountid
* @param string $from
* @param string $to
* @return mixed
*/
public function get_partner_calls($from, $to)
{
return $this->billing->get_partner_calls($from, $to);
}
/**
* Gets price of simulated one minute long call
*
* @param type $caller_number Number to call from
* @param type $number Number to call to
* @return mixed Array with price and details on success
* FALSE otherwise
*/
public function get_price_of_minute_call($caller_number, $number)
{
$call = $this->billing->simulate_call($number, $caller_number, 60);
if ($call && isset($call->descr) && $call->descr == 'OK')
{
$number = explode('@', $call->callee);
$number = explode(':', $number[0]);
$number = $number[1];
return array
(
'number' => $number,
'price' => doubleval($call->calls[0]->rate_sum),
'area' => $call->calls[0]->area
);
}
return FALSE;
}

/**
* Gets error from billing
*
* @return array
*/
public function get_error()
{
return $this->billing->get_error();
}
}
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