Method updatePayment

public function updatePayment($shippingId = 0)
{
    $paramsC = PhocacartUtils::getComponentParameters();
    $change_remove_payment_method = $paramsC->get('change_remove_payment_method', 1);
    $removeCoupon = 0;
    if ((int) $shippingId > 0) {
        // When we store shipping into database and immediately asking shipping id from database, we get empty result
        // this is why we need to know shipping ID here
        $currentShippingId = (int) $shippingId;
    } else {
        $currentShippingId = isset($this->shipping['id']) && $this->shipping['id'] > 0 ? (int) $this->shipping['id'] : 0;
    }
    $currentPaymentId = isset($this->payment['id']) && $this->payment['id'] > 0 ? (int) $this->payment['id'] : 0;
    if ($this->pos && (int) $this->vendor->id > 0) {
        $typeUser = 0;
    } else {
        if ((int) $this->user->id > 0) {
            $typeUser = 0;
        } else {
            $typeUser = 1;
        }
    }
    // $change_remove_payment_method is not a POS parameter
    // In POS we don't remove shpping or payment a priori but we always validate it
    if (!$this->pos && $change_remove_payment_method == 1) {
        PhocacartPayment::removePayment($typeUser, $removeCoupon);
        return;
    }
    if (!isset($this->total[0])) {
        $this->total[0] = array();
    }
    $isValidPayment = false;
    $paymentObject = new PhocacartPayment();
    $paymentObject->setType($this->type);
    if ($currentPaymentId > 0) {
        $isValidPayment = $paymentObject->checkAndGetPaymentMethod((int) $currentPaymentId, $this->total[0], (int) $currentShippingId);
    }
    if (!$isValidPayment) {
        PhocacartPayment::removePayment($typeUser, $removeCoupon);
    }
}