public override async Task Invoke(IOwinContext context)
{
try
{
var commandName = commandNameResolver.GetCommandName();
var command = commandFactory.Construct(commandName);
if (command != null)
{
context.SetCommand(command);
await Next.Invoke(context);
}
}
catch (CommandConstructionException ex)
{
context.Response.BadRequest(ex.Message);
}
catch (EmptyCommandBodyException)
{
context.Response.BadRequest("Command body was not provided");
}
catch (UnidentifiableCommandException)
{
context.Response.BadRequest("Could not identify command from request");
}
catch (UnknownCommandException ex)
{
context.Response.NotFound($"Command '{ex.Command}' does not exist.");
}
}
private Type GetCommandType(IOwinContext context)
{
var commandName = commandNameResolver.GetCommandName(context.Environment);
if (string.IsNullOrWhiteSpace(commandName))
{
throw new UnidentifiableCommandException();
}
var commandType = commandRegistry.GetCommandType(commandName);
if (commandType == null)
{
throw new UnknownCommandException(commandName);
}
return(commandType);
}