public Task <decimal> GetTrolleyCalculations(CalculateTrolleyTotalCommand.RequestTrolley request, CancellationToken cancellationToken)
{
_logger.LogInformation("Starting trolley total calculations");
_logger.LogDebug("Starting trolley total calculations for {@Trolley}", request);
var productPrices = new Dictionary <string, decimal>();
foreach (var productQuantity in request.Quantities)
{
decimal markedPrice = GerMarkedPrice(request, productQuantity);
var specialsPrice = GetSpecialsPrice(request, productQuantity, markedPrice);
decimal approvedProductPrice = ChooseLowerPrice(markedPrice, specialsPrice);
productPrices.Add(productQuantity.Name, approvedProductPrice);
}
var trolleyTotal = productPrices.Sum(x => x.Value);
_logger.LogDebug("Calculated Price Per Product: {@ProductPrices}", productPrices);
_logger.LogInformation("Calculated Price For Trolley {TrolleyTotal}", trolleyTotal);
return(Task.FromResult(trolleyTotal));
}
public async Task <decimal> GetTrolleyCalculations(CalculateTrolleyTotalCommand.RequestTrolley request, CancellationToken cancellationToken)
{
var apiClient = _apiClient;
var appSettings = _appSettings;
using var modelContent = new StringContent(JsonConvert.SerializeObject(request), System.Text.Encoding.UTF8, "application/json");
var response = await apiClient.PostAsync(
$"{appSettings.Value.Url}{UrlsConfig.TrolleyOperations.CalculateTrolleyTotal(appSettings.Value.Token)}",
modelContent,
cancellationToken);
var data = await response.Content.ReadAsStringAsync(cancellationToken);
if (response.IsSuccessStatusCode)
{
decimal.TryParse(data, out var total);
return(total);
}
throw new TrolleyCalculationRemoteException(response.StatusCode, data);
}
private static decimal GetSpecialsPrice(CalculateTrolleyTotalCommand.RequestTrolley request,
CalculateTrolleyTotalCommand.RequestTrolley.TrolleyProductQuantity productQuantity, decimal priceWithoutSpecials)
{
var productPrice = priceWithoutSpecials;
try
{
var sps = FindApplicableSpecial(request, productQuantity);
if (SpecialsIncorrectlySetup(sps))
{
return(productPrice);
}
var specialSetQuantity = GetSpecialsQuantity(productQuantity, sps);
if (SpecialQuantityInvalid(specialSetQuantity))
{
return(productPrice);
}
var productsOverFlowingSpecial = productQuantity.Quantity % specialSetQuantity;
var productSpecialPrice = (productQuantity.Quantity / specialSetQuantity) * sps.Total;
var productOverFlowPrice = productsOverFlowingSpecial *
request.Products.OrderBy(x => x.Price).FirstOrDefault().Price;
productPrice = productOverFlowPrice + productSpecialPrice;
return(productPrice);
}
catch
{
return(priceWithoutSpecials);
}
}
private static decimal GerMarkedPrice(CalculateTrolleyTotalCommand.RequestTrolley request, CalculateTrolleyTotalCommand.RequestTrolley.TrolleyProductQuantity productQuantity)
{
return(productQuantity.Quantity * request.Products.OrderBy(x => x.Price).FirstOrDefault().Price);
}
private static CalculateTrolleyTotalCommand.RequestTrolley.TrolleySpecial FindApplicableSpecial(CalculateTrolleyTotalCommand.RequestTrolley request, CalculateTrolleyTotalCommand.RequestTrolley.TrolleyProductQuantity productQuantity)
{
try
{
return(request.Specials.Where(x => x.Quantities.Any(q => q.Name == productQuantity.Name)).OrderByDescending(x => x.Total).FirstOrDefault());
}
catch (Exception e)
{
return(null);
}
}
