public string Receipt(IReceiptFormatter formatter = null)
{
if (formatter == null)
{
formatter = new DefaultFormatter();
}
var totalAmount = 0d;
var documentSb = new StringBuilder();
var headerSb = new StringBuilder($"Order Receipt for {Company}");
formatter.FormatHeader(headerSb);
documentSb.Append(headerSb);
var allLinesSb = new StringBuilder();
if (_lines.Any())
{
foreach (Line line in _lines)
{
double thisAmount = line.GetChargeAmount() - _discountHandler.Handle(line);
var lineSb = new StringBuilder($"{line.Quantity} x {line.Bike.Brand} {line.Bike.Model} = {thisAmount:C}");
formatter.FormatLine(lineSb);
allLinesSb.Append(lineSb);
totalAmount += thisAmount;
}
formatter.FormatAllLines(allLinesSb);
}
documentSb.Append(allLinesSb);
var subTotalSb = new StringBuilder($"Sub-Total: {totalAmount:C}");
formatter.FormatSubTotal(subTotalSb);
documentSb.Append(subTotalSb);
double tax = totalAmount * TaxRate;
var taxSb = new StringBuilder($"Tax: {tax:C}");
formatter.FormatTax(taxSb);
documentSb.Append(taxSb);
var totalSb = new StringBuilder($"Total: {totalAmount + tax:C}");
formatter.FormatTotal(totalSb);
documentSb.Append(totalSb);
formatter.FormatDocument(documentSb);
return(documentSb.ToString());
}
public virtual double Handle(Line line)
{
return(_nextHandler?.Handle(line) ?? 0d);
}