app\models\Invoice::getAmountPaid PHP Метод

    public function getAmountPaid($calculate = false)
    {
        if ($this->isType(INVOICE_TYPE_QUOTE) || $this->is_recurring) {
            return 0;
        }
        if ($calculate) {
            $amount = 0;
            foreach ($this->payments as $payment) {
                if ($payment->payment_status_id == PAYMENT_STATUS_VOIDED || $payment->payment_status_id == PAYMENT_STATUS_FAILED) {
                    continue;
                }
                $amount += $payment->getCompletedAmount();
            }
            return $amount;
        } else {
            return $this->amount - $this->balance;
        }
    }