<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Financial\CashFlow\Constant\Periodic;
use PhpOffice\PhpSpreadsheet\Calculation\Financial\Constants as FinancialConstants;
class InterestAndPrincipal
{
/** @var float */
protected $interest;
/** @var float */
protected $principal;
public function __construct(
float $rate = 0.0,
int $period = 0,
int $numberOfPeriods = 0,
float $presentValue = 0,
float $futureValue = 0,
int $type = FinancialConstants::PAYMENT_END_OF_PERIOD
) {
$payment = Payments::annuity($rate, $numberOfPeriods, $presentValue, $futureValue, $type);
$capital = $presentValue;
$interest = 0.0;
$principal = 0.0;
for ($i = 1; $i <= $period; ++$i) {
$interest = ($type === FinancialConstants::PAYMENT_BEGINNING_OF_PERIOD && $i == 1) ? 0 : -$capital * $rate;
$principal = (float) $payment - $interest;
$capital += $principal;
}
$this->interest = $interest;
$this->principal = $principal;
}
public function interest(): float
{
return $this->interest;
}
public function principal(): float
{
return $this->principal;
}
}