Kauri\Loan\PaymentAmountCalculator\AnnuityPaymentAmountCalculator

Complexity

Total Complexity

2

Size/Duplication

Total Lines	21
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
A	getPaymentAmount()	0	11	2

<?php

declare(strict_types = 1);

namespace Kauri\Loan\PaymentAmountCalculator;

use Kauri\Loan\PaymentAmountCalculatorInterface;


class AnnuityPaymentAmountCalculator implements PaymentAmountCalculatorInterface
{
    /**
     * @see http://www.financeformulas.net/Annuity_Payment_Formula.html
     * @param float $presentValue
     * @param float $ratePerPeriod
     * @param float $numberOfPeriods
     * @return float
     */
    public function getPaymentAmount(float $presentValue, float $ratePerPeriod, float $numberOfPeriods): float
    {
        if ($ratePerPeriod > 0) {
            $payment = (($ratePerPeriod / 100) * $presentValue) / (1 - pow(1 + ($ratePerPeriod / 100),
                        -$numberOfPeriods));
        } else {
            $payment = $presentValue / $numberOfPeriods;
        }

        return $payment;
    }
}