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Pull Request — master (#4)
by Kauri
08:37
created

AnnuityPaymentAmountCalculator::getPaymentAmount()   A

↳ Parent: AnnuityPaymentAmountCalculator

Complexity

Conditions 2
Paths 2

Size

Total Lines 11
Code Lines 7

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 6
CRAP Score 2

Importance

Changes 0
Metric Value
dl 0
loc 11
ccs 6
cts 6
cp 1
rs 9.4285
c 0
b 0
f 0
cc 2
eloc 7
nc 2
nop 3
crap 2
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<?php
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declare(strict_types = 1);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace Kauri\Loan\PaymentAmountCalculator;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Kauri\Loan\PaymentAmountCalculatorInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class AnnuityPaymentAmountCalculator implements PaymentAmountCalculatorInterface

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @see http://www.financeformulas.net/Annuity_Payment_Formula.html

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param float $presentValue

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param float $ratePerPeriod

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param float $numberOfPeriods

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @return float

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     */

            


            
                                                        
            
                                    
            
            

                
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    public function getPaymentAmount(float $presentValue, float $ratePerPeriod, float $numberOfPeriods): float

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        if ($ratePerPeriod > 0) {

            


            
                                                        
            
                                    
            
            

                
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            $payment = (($ratePerPeriod / 100) * $presentValue) / (1 - pow(1 + ($ratePerPeriod / 100),

            


            
                                                        
            
                                    
            
            

                
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                        -$numberOfPeriods));

            


            
                                                        
            
                                    
            
            

                
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        } else {

            


            
                                                        
            
                                    
            
            

                
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            $payment = $presentValue / $numberOfPeriods;

            


            
                                                        
            
                                    
            
            

                
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        }

            


            
                                                        
            
                                    
            
            

                
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        return $payment;

            


            
                                                        
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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