public InterestPlanViewModel(InterestPlanViewModelOption options)
{
Options = options ?? throw new ArgumentNullException(nameof(options));
Payments = new ObservableCollection <PaymentViewModel>();
CalculateCommand = new DelegateCommand(() =>
{
if (!_isPlanUpdating)
{
_isPlanUpdating = true;
var newCalculation = Calculate(Payments);
foreach (var oldItem in Payments)
{
oldItem.PropertyChanged -= PaymentViewModel_PropertyChanged;
}
Payments.Clear();
foreach (var newCalculationItem in newCalculation)
{
Payments.Add(newCalculationItem);
newCalculationItem.PropertyChanged += PaymentViewModel_PropertyChanged;
}
RaisePropertyChanged(nameof(TotalInterest));
RaisePropertyChanged(nameof(ResidualDebt));
RaisePropertyChanged(nameof(RedemptionRate));
_isPlanUpdating = false;
}
});
ResetCommand = new DelegateCommand(() => ResetAllInputValues());
CalculateCommand.Execute();
}
public MainWindowViewModelDesignTime() : base(new ConfigurationBuilder().Build())
{
InterestPlanViewModels.Clear();
InterestPlanViewModels.Add(new InterestPlanViewModel(InterestPlanViewModelOption.GetExample1()));
InterestPlanViewModels.Add(new InterestPlanViewModel(InterestPlanViewModelOption.GetExample2()));
Cultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures);
}
public void InitializeKeepsProperties()
{
var plan = new InterestPlanViewModel(InterestPlanViewModelOption.GetExample1());
var starMonth = DateTime.Now;
var loanAmount = new Currency(100.0);
var borrowingPercentage = new Percentage(0.001);
var monthlyPayment = new Currency(50.0);
var years = 15;
var unscheduledRepayment = new Percentage(.05);
var redemptionPercentage = Calculator.GetRedemptionPercentage(loanAmount, borrowingPercentage, monthlyPayment);
plan.StartMonth = starMonth;
plan.LoanAmount = loanAmount;
plan.Borrowing = borrowingPercentage;
plan.RedemptionRate = redemptionPercentage;
plan.Years = years;
plan.UnscheduledRepayment = unscheduledRepayment;
// TODO: Do something or remove that
var result = plan.Calculate(plan.Payments);
Assert.Equal(years, plan.Years);
Assert.Equal(starMonth, plan.StartMonth);
Assert.Equal(borrowingPercentage, plan.Borrowing);
Assert.Equal(monthlyPayment, Calculator.GetRedemptionAmount(loanAmount, borrowingPercentage, plan.RedemptionRate));
Assert.Equal(loanAmount, plan.LoanAmount);
Assert.Equal(unscheduledRepayment, plan.UnscheduledRepayment);
}
public void Properties()
{
var plan = new InterestPlanViewModel(InterestPlanViewModelOption.GetExample1());
var starMonth = DateTime.Now;
var loan = new Currency(100.0);
var borrowing = new Percentage(0.001);
var monthlyPayment = new Currency(50.0);
var years = 15;
var unscheduledRepayment = new Percentage(.05);
var redemptionPercentage = Calculator.GetRedemptionPercentage(loan, borrowing, monthlyPayment);
plan.StartMonth = starMonth;
plan.LoanAmount = loan;
plan.Borrowing = borrowing;
plan.RedemptionRate = redemptionPercentage;
plan.Years = years;
plan.UnscheduledRepayment = unscheduledRepayment;
Assert.Equal(years, plan.Years);
Assert.Equal(starMonth, plan.StartMonth);
Assert.Equal(borrowing, plan.Borrowing);
Assert.Equal(monthlyPayment, Calculator.GetRedemptionAmount(loan, borrowing, plan.RedemptionRate));
Assert.Equal(loan, plan.LoanAmount);
Assert.Equal(unscheduledRepayment, plan.UnscheduledRepayment);
}
private static void InitiateOptions(Rootobject options)
{
if (options.InterestPlanViewModelOptions.Count == 0)
{
options.InterestPlanViewModelOptions.Add(InterestPlanViewModelOption.GetExample1());
}
if (options.CultureInfo == null)
{
options.CultureInfo = Thread.CurrentThread.CurrentUICulture.ToString();
}
}
public MainWindowViewModel(IConfiguration configuration)
{
InterestPlanViewModels = new ObservableCollection <InterestPlanViewModel>();
InterestPlanViewModels.CollectionChanged += InterestPlanViewModels_CollectionChanged;
var options = configuration.Get <Rootobject>() ?? new Rootobject();
InitiateOptions(options);
options.InterestPlanViewModelOptions.ForEach(ip => AddInterestPlanViewModel(new InterestPlanViewModel(ip)));
SelectedCulture = CultureInfo.GetCultureInfo(options.CultureInfo);
Cultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures);
CreateWindowCommand = new DelegateCommand(() => CreateWindow?.Invoke());
AddInterestPlanCommand = new DelegateCommand(() =>
{
var p = new InterestPlanViewModel(InterestPlanViewModelOption.GetExample1());
AddInterestPlanViewModel(p);
SelectedInterestPlanViewModelIndex = InterestPlanViewModels.IndexOf(p);
});
DeleteInterestPlanCommand = new DelegateCommand(
() =>
{
var interestPlanViewModel = InterestPlanViewModels.ElementAt(SelectedInterestPlanViewModelIndex);
interestPlanViewModel.PropertyChanged -= InterestPlanViewModel_PropertyChanged;
InterestPlanViewModels.Remove(interestPlanViewModel);
},
() => InterestPlanViewModels.Count > 1
);
ResetAllCommand = new DelegateCommand(() => InterestPlanViewModels.ToList().ForEach(ip => ip.ResetCommand.Execute()));
CalculateAllCommand = new DelegateCommand(() => InterestPlanViewModels.ToList().ForEach(ip => ip.CalculateCommand.Execute()));
ResetAllCommand.Execute();
}
public InterestPlanViewModelDesignTime() : base(InterestPlanViewModelOption.GetExample1())
{
}