public ITrolleyCalculationService GetTrolleyCalculator(TrolleyCalculatorType calculatorType)
{
switch (calculatorType)
{
case TrolleyCalculatorType.Local:
return(_provider.GetRequiredService <LocalTrolleyCalculationService>());
default:
return(_provider.GetRequiredService <RemoteTrolleyCalculationService>());
}
}
public CalculateTrolleyTotalCommand(RequestTrolley trolley, TrolleyCalculatorType calculatorType)
{
if (trolley == null)
{
throw new ArgumentNullException(nameof(trolley));
}
if (trolley.Products == null)
{
throw new ArgumentNullException(nameof(trolley.Products));
}
if (trolley.Quantities == null)
{
throw new ArgumentNullException(nameof(trolley.Quantities));
}
if (trolley.Quantities.Select(x => x.Name).Except(trolley.Products.Select(x => x.Name)).Any())
{
throw new InvalidTrolleyStateException("Products and Quantities are out of sync");
}
if (trolley.Specials != null &&
trolley.Specials.Any() &&
trolley.Specials.SelectMany(x => x.Quantities.Select(q => q.Name))
.Except(trolley.Products.Select(x => x.Name)).Any())
{
throw new InvalidTrolleyStateException("Products and Specials are out of sync");
}
if (trolley.Quantities.Any(x => x.Quantity <= 0))
{
throw new InvalidTrolleyStateException("Quantities cannot be negative");
}
Trolley = trolley;
TrolleyCalculatorType = calculatorType;
}
