public decimal GetTrolleyTotal(TrolleyModel trolley)
{
_trolley = trolley;
if ((_trolley == null) ||
(_trolley.Products == null) ||
(_trolley.Quantities == null))
{
return(0);
}
decimal lowestTotal = CalculateProductTotal();
List <TrolleySpecial> specials = GetApplicableSpecials();
if (specials.Count > 0)
{
decimal specialsTotal = GetSpecialsLowestTotal(specials);
if (specialsTotal < lowestTotal)
{
lowestTotal = specialsTotal;
}
}
return(lowestTotal);
}
public void GetTrolleyTotal_WithSpecial()
{
TrolleyModel trolleyModel = new TrolleyModel();
trolleyModel.Products = new List <TrolleyProduct>();
trolleyModel.Products.Add(new TrolleyProduct()
{
Name = "Product 0", Price = 2
});
trolleyModel.Products.Add(new TrolleyProduct()
{
Name = "Product 1", Price = 5
});
trolleyModel.Specials = new List <TrolleySpecial>();
List <TrolleyProductQuantity> tpq1 = new List <TrolleyProductQuantity>();
tpq1.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 3
});
tpq1.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 0
});
trolleyModel.Specials.Add(new TrolleySpecial()
{
Total = 5, Quantities = tpq1
});
List <TrolleyProductQuantity> tpq2 = new List <TrolleyProductQuantity>();
tpq2.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 1
});
tpq2.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 2
});;
trolleyModel.Specials.Add(new TrolleySpecial()
{
Total = 10, Quantities = tpq2
});
trolleyModel.Quantities = new List <TrolleyProductQuantity>();
trolleyModel.Quantities.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 3
});
trolleyModel.Quantities.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 2
});
decimal total = _trolleyTotalService.GetTrolleyTotal(trolleyModel);
Assert.AreEqual(14, total);
}
public void TestTrolleyTotal()
{
// arrange
var trolley = new TrolleyModel
{
products = new[]
{
new ProductModel {
name = "c", price = 1.01d
},
new ProductModel {
name = "a", price = 1.07d
},
new ProductModel {
name = "d", price = 0.99d
},
new ProductModel {
name = "b", price = 1.04d
},
},
specials = new[]
{
new SpecialModel {
quantities = new[]
{
new QuantityModel {
name = "e", quantity = 3d
},
new QuantityModel {
name = "f", quantity = 5d
},
},
total = 25d
}
},
quantities = new[]
{
new QuantityModel {
name = "a", quantity = 2d
},
new QuantityModel {
name = "b", quantity = 4d
},
new QuantityModel {
name = "c", quantity = 1d
},
new QuantityModel {
name = "d", quantity = 5d
}
}
};
// act
var rs = new ResourceService(It.IsAny <HttpClient>(), It.IsAny <IOptions <Config> >());
decimal total = rs.TrolleyTotal(trolley.products, trolley.specials, trolley.quantities);
// assert
Assert.AreEqual((decimal)37.26, total);
}
public async Task <IActionResult> TrolleyTotal([FromBody] TrolleyModel trolleyModel)
{
Logger?.LogDebug("'{0}' has been invoked", nameof(TrolleyTotal));
var trolleyTotal = await _mediator.Send(new GetTrolleyTotalQuery(trolleyModel, Environment.GetEnvironmentVariable("AUTHENTICATION_TOKEN")));
return(Ok(trolleyTotal));
}
public async Task getTrolleyTotalSample4()
{
decimal expected = 6.296458940268143M;
TrolleyModel trolleyModel = JsonConvert.DeserializeObject <TrolleyModel>(File.ReadAllText(@"Mock\\Trolley\\TrolleyRequest-Sample4.json"));
var trolleyService = new TrolleyService();
var result = await trolleyService.GetTrollyTotal(trolleyModel, _token);
Assert.Equal(expected, result);
}
public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
TrolleyModel data = JsonConvert.DeserializeObject <TrolleyModel>(requestBody);
var products = data.products;
var specials = data.specials;
var quantities = data.quantities;
var res = _service.TrolleyTotal(products, specials, quantities);
return(new OkObjectResult(res));
}
private Trolley CreateTrolley(TrolleyModel trolleyModel)
{
var trolley = new Trolley();
var products = trolleyModel.Products.ToDictionary(p => p.Name, p => new ProductRef
{
Name = p.Name,
Price = p.Price,
});
foreach (var item in trolleyModel.Quantities)
{
trolley.AddItem(products[item.Name], item.Quantity);
}
foreach (var item in trolleyModel.Specials.SelectMany(s => s.Quantities))
{
var special = new TrolleySpecial();
special.AddItem(products[item.Name], item.Quantity);
trolley.AddSpecial(special);
}
return(trolley);
}
public IActionResult Total([FromBody] TrolleyModel trolleyModel)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
var trolleyModelJson = JsonConvert.SerializeObject(trolleyModel);
System.Diagnostics.Trace.WriteLine(trolleyModelJson);
logger.LogError(trolleyModelJson);
try
{
var trolley = CreateTrolley(trolleyModel);
var total = trolleyService.CalculateTotal(trolley);
return(Ok(total));
}
catch (Exception ex)
{
logger.LogError(ex, ex.Message);
return(StatusCode(StatusCodes.Status500InternalServerError, "Operation failed."));
}
}
private decimal CalculateTrolleyTotal(TrolleyModel trolleyModel)
{
//STEP 1
//Get the list of products and quantities into respective dictionaries
var productDictionary = trolleyModel.Products.ToDictionary(x => x.Name, x => x.Price);
var quantityDictionary = trolleyModel.Quantities.ToDictionary(y => y.Name, y => y.Quantity);
//if there are no products/quantities exists just return 0
if (productDictionary.Count == 0 || quantityDictionary.Count == 0 ||
productDictionary.Sum(x => x.Value) <= 0 ||
quantityDictionary.Sum(x => x.Value) <= 0)
{
return(0);
}
//STEP 2
//if product & quantity names doesn't match throw exception
var productQualityDiff = productDictionary.Keys.Except(quantityDictionary.Keys).Concat(quantityDictionary.Keys.Except(productDictionary.Keys));
if (productQualityDiff.Any())
{
var ex = new Exception(message: "incomplete content");
ex.Data.Add("product quality differences: ", productQualityDiff);
throw ex;
}
//STEP 3
//get the maximum price and keep it aside
var maxPrice = productDictionary.ToDictionary(orig => orig.Key, orig => orig.Value * quantityDictionary[orig.Key]).Sum(x => x.Value);
//check if specials exists, if not just return regular price
if (trolleyModel.Specials.Count == 0)
{
return(maxPrice);
}
//STEP 4
//Now get the list of quantities as dictionaries along with their totals and unit price
var listOfSpecials = new List <(Dictionary <string, int> Quantity, decimal Total)>();
trolleyModel.Specials.ForEach(special =>
{
//Check if the special quantity exceeds required quantity, if so just ignore this special
if (special.Quantities.ToDictionary(p => p.Name, p => quantityDictionary[p.Name] - p.Quantity)
.ToDictionary(orig => orig.Key, orig => orig.Value).Any(x => x.Value < 0) || special.Quantities.Sum(x => x.Quantity) <= 0)
{
return;
}
listOfSpecials.Add((special.Quantities.ToDictionary(x => x.Name, x => x.Quantity), special.Total));
});
//there are no special that can offer better unit price than maxPrice, so just return maxPrice
if (listOfSpecials.Count == 0)
{
return(maxPrice);
}
//Add the max price to the price combinations
priceCombinations.Add(maxPrice);
//STEP 5
//Validate specials against the products
listOfSpecials.ForEach(special =>
{
if (productDictionary.Keys.Except(special.Quantity.Keys).Concat(special.Quantity.Keys.Except(productDictionary.Keys)).Any())
{
priceCombinations.Add(0);
return;
}
});
//STEP 6
//Get the lowest special quantity based on the following criteria
//a. that offers best unit price
//b. that has least quantity so that
//var lowestSpecialQuantity = listOfSpecials.OrderBy(x => x.UnitPrice).ThenBy(y => y.Quantity.Values.Sum()).FirstOrDefault();
listOfSpecials.ForEach(special =>
{
//Get all the price combinations using lowest special quantity
AddPriceCombinations(special, listOfSpecials, quantityDictionary, productDictionary);
});
//FINAL STEP
//Finally return the least possible price from the list
return(priceCombinations.Min());
}
public async Task <decimal> GetTrollyTotal(TrolleyModel TrolleyModel, string token)
{
decimal trolleyTotal = CalculateTrolleyTotal(TrolleyModel);
return(await Task.FromResult(trolleyTotal));
}
public void GetTrolleyTotal_NoSpecial()
{
TrolleyModel trolleyModel = new TrolleyModel();
trolleyModel.Products = new List <TrolleyProduct>();
trolleyModel.Products.Add(new TrolleyProduct()
{
Name = "Product 0", Price = 14.6584559975464M
});
trolleyModel.Products.Add(new TrolleyProduct()
{
Name = "Product 1", Price = 6.25149348110496M
});
trolleyModel.Products.Add(new TrolleyProduct()
{
Name = "Product 2", Price = 13.6667721409662M
});
trolleyModel.Specials = new List <TrolleySpecial>();
List <TrolleyProductQuantity> tpq1 = new List <TrolleyProductQuantity>();
tpq1.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 5
});
tpq1.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 5
});
tpq1.Add(new TrolleyProductQuantity()
{
Name = "Product 2", Quantity = 2
});
trolleyModel.Specials.Add(new TrolleySpecial()
{
Total = 8.78499156130719M, Quantities = tpq1
});
List <TrolleyProductQuantity> tpq2 = new List <TrolleyProductQuantity>();
tpq2.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 0
});
tpq2.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 4
});
tpq2.Add(new TrolleyProductQuantity()
{
Name = "Product 2", Quantity = 3
});
trolleyModel.Specials.Add(new TrolleySpecial()
{
Total = 31.7466055797785M, Quantities = tpq2
});
List <TrolleyProductQuantity> tpq3 = new List <TrolleyProductQuantity>();
tpq3.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 1
});
tpq3.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 9
});
tpq3.Add(new TrolleyProductQuantity()
{
Name = "Product 2", Quantity = 5
});
trolleyModel.Specials.Add(new TrolleySpecial()
{
Total = 29.3865395547186M, Quantities = tpq3
});
trolleyModel.Quantities = new List <TrolleyProductQuantity>();
trolleyModel.Quantities.Add(new TrolleyProductQuantity()
{
Name = "Product 0", Quantity = 5
});
trolleyModel.Quantities.Add(new TrolleyProductQuantity()
{
Name = "Product 1", Quantity = 7
});
trolleyModel.Quantities.Add(new TrolleyProductQuantity()
{
Name = "Product 2", Quantity = 1
});
decimal total = _trolleyTotalService.GetTrolleyTotal(trolleyModel);
Assert.AreEqual(130.71950649643292M, total);
}
public decimal GetTrolleyTotal([FromBody] TrolleyModel trolley)
{
return(_service.GetTrolleyTotal(trolley));
}
public GetTrolleyTotalQuery(TrolleyModel trolleyModel, string token)
{
TrolleyModel = trolleyModel;
Token = token;
}