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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Financial\CashFlow\Constant\Periodic;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Financial\CashFlow\CashFlowValidations;
use PhpOffice\PhpSpreadsheet\Calculation\Financial\Constants as FinancialConstants;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
class Cumulative
{
/**
* CUMIPMT.
*
* Returns the cumulative interest paid on a loan between the start and end periods.
*
* Excel Function:
* CUMIPMT(rate,nper,pv,start,end[,type])
*
* @param mixed $rate The Interest rate
* @param mixed $periods The total number of payment periods
* @param mixed $presentValue Present Value
* @param mixed $start The first period in the calculation.
* Payment periods are numbered beginning with 1.
* @param mixed $end the last period in the calculation
* @param mixed $type A number 0 or 1 and indicates when payments are due:
* 0 or omitted At the end of the period.
* 1 At the beginning of the period.
*
* @return float|string
*/
public static function interest(
$rate,
$periods,
$presentValue,
$start,
$end,
$type = FinancialConstants::PAYMENT_END_OF_PERIOD
) {
$rate = Functions::flattenSingleValue($rate);
$periods = Functions::flattenSingleValue($periods);
$presentValue = Functions::flattenSingleValue($presentValue);
$start = Functions::flattenSingleValue($start);
$end = Functions::flattenSingleValue($end);
$type = ($type === null) ? FinancialConstants::PAYMENT_END_OF_PERIOD : Functions::flattenSingleValue($type);
try {
$rate = CashFlowValidations::validateRate($rate);
$periods = CashFlowValidations::validateInt($periods);
$presentValue = CashFlowValidations::validatePresentValue($presentValue);
$start = CashFlowValidations::validateInt($start);
$end = CashFlowValidations::validateInt($end);
$type = CashFlowValidations::validatePeriodType($type);
} catch (Exception $e) {
return $e->getMessage();
}
// Validate parameters
if ($start < 1 || $start > $end) {
return ExcelError::NAN();
}
// Calculate
$interest = 0;
for ($per = $start; $per <= $end; ++$per) {
$ipmt = Interest::payment($rate, $per, $periods, $presentValue, 0, $type);
if (is_string($ipmt)) {
return $ipmt;
}
$interest += $ipmt;
}
return $interest;
}
/**
* CUMPRINC.
*
* Returns the cumulative principal paid on a loan between the start and end periods.
*
* Excel Function:
* CUMPRINC(rate,nper,pv,start,end[,type])
*
* @param mixed $rate The Interest rate
* @param mixed $periods The total number of payment periods as an integer
* @param mixed $presentValue Present Value
* @param mixed $start The first period in the calculation.
* Payment periods are numbered beginning with 1.
* @param mixed $end the last period in the calculation
* @param mixed $type A number 0 or 1 and indicates when payments are due:
* 0 or omitted At the end of the period.
* 1 At the beginning of the period.
*
* @return float|string
*/
public static function principal(
$rate,
$periods,
$presentValue,
$start,
$end,
$type = FinancialConstants::PAYMENT_END_OF_PERIOD
) {
$rate = Functions::flattenSingleValue($rate);
$periods = Functions::flattenSingleValue($periods);
$presentValue = Functions::flattenSingleValue($presentValue);
$start = Functions::flattenSingleValue($start);
$end = Functions::flattenSingleValue($end);
$type = ($type === null) ? FinancialConstants::PAYMENT_END_OF_PERIOD : Functions::flattenSingleValue($type);
try {
$rate = CashFlowValidations::validateRate($rate);
$periods = CashFlowValidations::validateInt($periods);
$presentValue = CashFlowValidations::validatePresentValue($presentValue);
$start = CashFlowValidations::validateInt($start);
$end = CashFlowValidations::validateInt($end);
$type = CashFlowValidations::validatePeriodType($type);
} catch (Exception $e) {
return $e->getMessage();
}
// Validate parameters
if ($start < 1 || $start > $end) {
return ExcelError::VALUE();
}
// Calculate
$principal = 0;
for ($per = $start; $per <= $end; ++$per) {
$ppmt = Payments::interestPayment($rate, $per, $periods, $presentValue, 0, $type);
if (is_string($ppmt)) {
return $ppmt;
}
$principal += $ppmt;
}
return $principal;
}
}
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