public string Print()
{
StringBuilder builder = new StringBuilder();
builder.AppendLine($"{"Category Name",15} {"Product Name",15} {"Quantity",10} {"Unit Price",12} {"Total Price",12}");
var categoryWithProducts = ProductsWithQuantity.GroupBy(p => p.Key.Category.Title).ToDictionary(e => e.Key, e => e.ToList());
foreach (var category in categoryWithProducts)
{
foreach (var product in category.Value)
{
builder.AppendLine($"{category.Key,15} {product.Key.Title,15} {product.Value,10} {product.Key.Price,12} {(product.Key.Price * product.Value),12}\t");
}
}
var totalAmount = GetTotalAmount();
var totalAmountAfterDiscount = GetTotalAmountAfterDiscounts();
var totalDeliveryCost = GetDeliveryCost();
builder.AppendLine($"\nTotal Amount: {Math.Round(totalAmount, 2)}");
builder.AppendLine($"Total Discount: {Math.Round(totalAmount - totalAmountAfterDiscount, 2)}");
builder.AppendLine($"Total Amount After Discounts: {Math.Round(totalAmountAfterDiscount, 2)}");
builder.AppendLine($"Delivery Cost: {Math.Round(totalDeliveryCost, 2)}");
builder.AppendLine($"Payable Amount: {Math.Round((double)totalAmountAfterDiscount + (double)totalDeliveryCost, 2)}");
return(builder.ToString());
}
public void AddItem(Product product, double amount)
{
this.CheckRule(new ValueMustBeGreaterThanZeroRule(amount, "Added Product Amount"));
this.CheckRule(new ObjectNotNullRule(product, "Added Product"));
if (ProductsWithQuantity.TryGetValue(product, out double productAmount))
{
ProductsWithQuantity[product] = productAmount + amount;
}
else
{
ProductsWithQuantity.Add(product, amount);
}
}
public double GetTotalAmount()
{
return(ProductsWithQuantity.Sum(e => e.Key.Price * e.Value));
}
public double GetTotalQuantity()
{
return(ProductsWithQuantity.Sum(x => x.Value));
}
public int GetDeliveryCount()
{
return(ProductsWithQuantity.GroupBy(e => e.Key.Category.Title).Count());
}
private Dictionary <Product, double> GetProductsByCategory(Category category)
{
return(ProductsWithQuantity.Where(p => p.Key.Category == category).ToDictionary(p => p.Key, p => p.Value));
}
