/**
* Gets the sum of all services, converted to user's
* preferred currency with current exchange rate.
*
* It is possible to pass a collection of services to this method,
* and it will return the sum of that collection.
*
* @param Collection|null $services
* @return [type]
*/
public function getSum(Collection $services = null)
{
if (!$services instanceof Collection) {
$services = $this->all();
}
$preferredCurrency = strtoupper(auth()->user()->preferred_currency);
$sum = 0;
foreach ($services as $service) {
$currentCurrency = strtoupper($service->currency);
$exchange_rate = \Swap::quote("{$currentCurrency}/{$preferredCurrency}")->getValue();
$sum += $service->cost / 100 * $exchange_rate;
}
//$sum = ceil($sum);
return number_format($sum, 2, ',', '.') . ' ' . $preferredCurrency;
}
