public static Command Parse(string input)
{
string[] values = input.Split(' ');
if (!values.Any())
{
throw new ArgumentException("No command specified.");
}
// command should be first
if (!Enum.TryParse(values[0].ToPascalCase(), out CommandType type))
{
throw new ArgumentException($"Invalid command {values[0]}");
}
if (type == CommandType.Undefined)
{
throw new ArgumentException($"Invalid command {type}");
}
string[] args = values.Skip(1).ToArray();
Command command = null;
switch (type)
{
case CommandType.End:
{
command = new EndCommand();
break;
}
case CommandType.Flag:
{
command = new FlagCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
if (args.Length != requiredArgs.Count)
{
throw new ArgumentException($"Command type {type} requires {requiredArgs.Count} arguments.");
}
if (!int.TryParse(args[0], out int x))
{
throw new ArgumentException($"Parameter {CommandKeys.XPosition} must be an integer.");
}
if (!int.TryParse(args[1], out int y))
{
throw new ArgumentException($"Parameter {CommandKeys.YPosition} must be an integer.");
}
requiredArgs[CommandKeys.XPosition] = x;
requiredArgs[CommandKeys.YPosition] = y;
command.Build(requiredArgs);
break;
}
case CommandType.Help:
{
command = new HelpCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
if (args.Length > 0)
{
if (args.Length > 1)
{
throw new ArgumentException($"Command type {type} requires 1 or 0 arguments.");
}
if (!Enum.TryParse(args[0].ToPascalCase(), out CommandType commandType))
{
throw new ArgumentException($"Invalid command type {args[0]}");
}
requiredArgs[CommandKeys.CommandName] = commandType;
command.Build(requiredArgs);
}
break;
}
case CommandType.New:
{
command = new NewCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
if (args.Length != requiredArgs.Count)
{
throw new ArgumentException($"Command type {type} requires {requiredArgs.Count} arguments.");
}
if (!int.TryParse(args[0], out int x))
{
throw new ArgumentException($"Parameter {CommandKeys.XLength} must be an integer.");
}
if (!int.TryParse(args[1], out int y))
{
throw new ArgumentException($"Parameter {CommandKeys.YLength} must be an integer.");
}
if (!int.TryParse(args[2], out int b))
{
throw new ArgumentException($"Parameter {CommandKeys.Bombs} must be an integer.");
}
requiredArgs[CommandKeys.XLength] = x;
requiredArgs[CommandKeys.YLength] = y;
requiredArgs[CommandKeys.Bombs] = b;
command.Build(requiredArgs);
break;
}
case CommandType.Open:
{
command = new OpenCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
if (args.Length != requiredArgs.Count)
{
throw new ArgumentException($"Command type {type} requires {requiredArgs.Count} arguments.");
}
if (!int.TryParse(args[0], out int x))
{
throw new ArgumentException($"Parameter {CommandKeys.XPosition} must be an integer.");
}
if (!int.TryParse(args[1], out int y))
{
throw new ArgumentException($"Parameter {CommandKeys.YPosition} must be an integer.");
}
requiredArgs[CommandKeys.XPosition] = x;
requiredArgs[CommandKeys.YPosition] = y;
command.Build(requiredArgs);
break;
}
case CommandType.Quit:
{
command = new QuitCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
break;
}
case CommandType.Unflag:
{
command = new UnflagCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
if (args.Length != requiredArgs.Count)
{
throw new ArgumentException($"Command type {type} requires {requiredArgs.Count} arguments.");
}
if (!int.TryParse(args[0], out int x))
{
throw new ArgumentException($"Parameter {CommandKeys.XPosition} must be an integer.");
}
if (!int.TryParse(args[1], out int y))
{
throw new ArgumentException($"Parameter {CommandKeys.YPosition} must be an integer.");
}
requiredArgs[CommandKeys.XPosition] = x;
requiredArgs[CommandKeys.YPosition] = y;
command.Build(requiredArgs);
break;
}
case CommandType.Status:
{
command = new StatusCommand();
Dictionary <string, object> requiredArgs = command.GetRequiredArguments();
if (args.Length != requiredArgs.Count)
{
throw new ArgumentException($"Command type {type} requires {requiredArgs.Count} arguments.");
}
if (!int.TryParse(args[0], out int x))
{
throw new ArgumentException($"Parameter {CommandKeys.XPosition} must be an integer.");
}
if (!int.TryParse(args[1], out int y))
{
throw new ArgumentException($"Parameter {CommandKeys.YPosition} must be an integer.");
}
requiredArgs[CommandKeys.XPosition] = x;
requiredArgs[CommandKeys.YPosition] = y;
command.Build(requiredArgs);
break;
}
}
return(command);
}