evo/EvoCalculator.Core
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env: add CALCULATION_IRR

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This commit is contained in:
vchikalkin 2023-09-27 11:05:36 +03:00
parent 84f8b2fffe
commit 5ba21a49fc
2 changed files with 18 additions and 15 deletions
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28
EvoCalculator.Core.Calculation/BaseCalculation.cs
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@ -1,4 +1,5 @@
using System; using System;
using System.Globalization;
using System.Linq; using System.Linq;
using EvoCalculator.Core.Models.BaseCalculation.Models.Request; using EvoCalculator.Core.Models.BaseCalculation.Models.Request;
using EvoCalculator.Core.Models.BaseCalculation.Models.Response; using EvoCalculator.Core.Models.BaseCalculation.Models.Response;
@ -8,41 +9,42 @@ namespace EvoCalculator.Core.Calculation;
public class BaseCalculation public class BaseCalculation
{ {
const double IRR = 0.155; private double IRR = 0;
private Constants.Calculation constants; private Constants.Calculation constants = new();
public BaseCalculation() public BaseCalculation()
{ {
this.constants = new Constants.Calculation(); var envCalculationIRR = Environment.GetEnvironmentVariable("CALCULATION_IRR");
IRR = float.Parse(envCalculationIRR, CultureInfo.InvariantCulture);
} }
public ResponseBaseCalculation Calculate(RequestBaseCalculation requestBaseCalculation) public ResponseBaseCalculation Calculate(RequestBaseCalculation requestBaseCalculation)
{ {
var initialPaymentSum = var initialPaymentSum =
requestBaseCalculation.car_price * (decimal) (requestBaseCalculation.initial_payment / 100); requestBaseCalculation.car_price * (decimal)(requestBaseCalculation.initial_payment / 100);
var redemptionPaymentSum = requestBaseCalculation.car_price * var redemptionPaymentSum = requestBaseCalculation.car_price *
(decimal) (requestBaseCalculation.redemption_payment / 100); (decimal)(requestBaseCalculation.redemption_payment / 100);
var IRRperMonth = Math.Pow(1 + IRR / 12, requestBaseCalculation.lease_period - 2); var IRRperMonth = Math.Pow(1 + IRR / 12, requestBaseCalculation.lease_period - 2);
var monthlyPayment = (IRR / 12) * var monthlyPayment = (IRR / 12) *
(double) ((requestBaseCalculation.car_price - initialPaymentSum) * (double)((requestBaseCalculation.car_price - initialPaymentSum) *
(decimal) IRRperMonth - redemptionPaymentSum) / (IRRperMonth - 1); (decimal)IRRperMonth - redemptionPaymentSum) / (IRRperMonth - 1);
var leaseContractSum = (requestBaseCalculation.lease_period - 2) * (decimal) monthlyPayment + var leaseContractSum = (requestBaseCalculation.lease_period - 2) * (decimal)monthlyPayment +
initialPaymentSum + initialPaymentSum +
redemptionPaymentSum; redemptionPaymentSum;
var taxSavings = leaseContractSum * (decimal) (constants.VatValue / 1.2); var taxSavings = leaseContractSum * (decimal)(constants.VatValue / 1.2);
var schedule = Array<decimal>.Concat( var schedule = Array<decimal>.Concat(
new decimal[] {initialPaymentSum} new decimal[] { initialPaymentSum }
, Enumerable.Repeat((decimal) monthlyPayment, requestBaseCalculation.lease_period - 2).ToArray() , Enumerable.Repeat((decimal)monthlyPayment, requestBaseCalculation.lease_period - 2).ToArray()
, new decimal[] {redemptionPaymentSum} , new decimal[] { redemptionPaymentSum }
); );
return new ResponseBaseCalculation() return new ResponseBaseCalculation()
{ {
monthly_payment = (decimal) monthlyPayment, monthly_payment = (decimal)monthlyPayment,
tax_savings = taxSavings, tax_savings = taxSavings,
vat_reimbursement = taxSavings, vat_reimbursement = taxSavings,
schedule = schedule schedule = schedule

3
EvoCalculator.Core/Properties/launchSettings.json
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@ -26,7 +26,8 @@
"ASPNETCORE_ENVIRONMENT": "Development", "ASPNETCORE_ENVIRONMENT": "Development",
"calculation_v2_date": "2021-09-02", "calculation_v2_date": "2021-09-02",
"calculation_v3_date": "2022-03-30", "calculation_v3_date": "2022-03-30",
"post_calculation_v2_date": "2022-04-14" "post_calculation_v2_date": "2022-04-14",
"calculation_irr": "0.21"
} }
} }
} }