/// <summary>
/// Sets the errorMessage member variable
/// </summary>
/// <param name="action">Name of the Command</param>
/// <param name="isInitialized">denotes whether a valid PLACE command has been placed already</param>
private void SetErrorMessage(TurtleInstruction action, bool isInitialized)
{
this.errorMessage = isInitialized ?
string.Format("Turtle cannot {0} there.", action.ToString().ToUpper()) :
string.Format("Turtle cannot {0} until it has been placed on the table.", action.ToString().ToUpper());
}
/// <summary>
/// Strategy Pattern Execution of Commands
/// </summary>
/// <param name="instruction">Command Name</param>
/// <param name="turtle">a turtle object</param>
/// <param name="arguments">optional parameters</param>
/// <param name="message">massage after command execution completed</param>
/// <returns>command execution status</returns>
public static bool DoExecution(TurtleInstruction instruction, ITurtle turtle, string[] arguments, out string message)
{
return(strategies[instruction].DoExecution(turtle, arguments, out message));
}