public void Process(Command command, StringBuilder output)
{
switch (command.Name)
{
case "AddProduct":
{
this.AddProduct(command.Arguments, output);
break;
}
case "DeleteProducts":
{
this.DeleteProducts(command.Arguments, output);
break;
}
case "FindProductsByName":
{
this.ListProductsByName(command.Arguments, output);
break;
}
case "FindProductsByProducer":
{
this.ListProductsByProducer(command.Arguments, output);
break;
}
case "FindProductsByPriceRange":
{
this.ListProductsByPriceRange(command.Arguments, output);
break;
}
default:
{
throw new ArgumentException("Invalid command: " + command.Name, "command");
}
}
}
private static void AddProductCommand(Catalog catalog, Command command, StringBuilder output)
{
catalog.Add(new Content()
{
Name = command.Parameters[(int) ContentItemTypes.Name],
Price = double.Parse(command.Parameters[(int) ContentItemTypes.Price]),
Producer = command.Parameters[(int) ContentItemTypes.Producer]
});
output.AppendLine("Product added");
}
private void FindProductsByPriceRangeCommand(Catalog catalog, Command command, StringBuilder output)
{
var contentList = catalog.GetContentByPriceRange(double.Parse(command.Parameters[0]), double.Parse(command.Parameters[1]));
if (contentList != null && contentList.Count() > 0)
{
foreach (var content in contentList)
{
output.AppendLine(content.ToString());
}
}
else
{
output.AppendLine("No products found");
}
}
public static Command Parse(string value)
{
if (value == null)
{
throw new ArgumentNullException("value", "value cannot be null.");
}
int firstSpaceIndex = value.IndexOf(" ");
string name = value.Substring(0, firstSpaceIndex);
string argumentsList = value.Substring(firstSpaceIndex + 1).Trim();
string[] arguments = argumentsList.Split(new char[] { ';' });
Command command = new Command(name, arguments);
return command;
}
private static void DeleteProductsCommand(Catalog catalog, Command command, StringBuilder output)
{
int updatedCount = 0;
if (command.Parameters.Length > 1)
{
updatedCount = catalog.Delete(command.Parameters[0], command.Parameters[1]);
}
else
{
updatedCount = catalog.Delete(string.Empty, command.Parameters[0]);
}
if (updatedCount > 0)
{
output.AppendLine(String.Format("{0} products deleted", updatedCount));
}
else
{
output.AppendLine("No products found");
}
}
public void ExecuteCommand(Catalog catalog, Command command, StringBuilder output)
{
switch (command.Type)
{
case CommandTypes.AddProduct:
AddProductCommand(catalog, command, output);
break;
case CommandTypes.DeleteProducts:
DeleteProductsCommand(catalog, command, output);
break;
case CommandTypes.FindProductsByName:
FindProductsByNameCommand(catalog, command, output);
break;
case CommandTypes.FindProductsByPriceRange:
FindProductsByPriceRangeCommand(catalog, command, output);
break;
case CommandTypes.FindProductsByProducer:
FindProductsByProducerCommand(catalog, command, output);
break;
default:
throw new ArgumentException("Unknown command: " + command.Type.ToString());
}
}