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lib/PhpSpreadsheet/Calculation/Financial/CashFlow/CashFlowValidations.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Calculation\Financial\CashFlow;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Financial\Constants as FinancialConstants;
+use PhpOffice\PhpSpreadsheet\Calculation\Financial\FinancialValidations;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
+
+class CashFlowValidations extends FinancialValidations
+{
+    public static function validateRate(mixed $rate): float
+    {
+        $rate = self::validateFloat($rate);
+
+        return $rate;
+    }
+
+    public static function validatePeriodType(mixed $type): int
+    {
+        $rate = self::validateInt($type);
+        if (
+            $type !== FinancialConstants::PAYMENT_END_OF_PERIOD
+            && $type !== FinancialConstants::PAYMENT_BEGINNING_OF_PERIOD
+        ) {
+            throw new Exception(ExcelError::NAN());
+        }
+
+        return $rate;
+    }
+
+    public static function validatePresentValue(mixed $presentValue): float
+    {
+        return self::validateFloat($presentValue);
+    }
+
+    public static function validateFutureValue(mixed $futureValue): float
+    {
+        return self::validateFloat($futureValue);
+    }
+}