/// <summary>
/// Creates a new command targeting at given method.
/// </summary>
/// <param name="method">Method invoked by command</param>
/// <param name="commandInfo">Command method attribute providing metadata</param>
/// <returns>Newly created command or null in case of error</returns>
private static GmCommandHandler CreateCommand(MethodInfo method, CommandAttribute commandInfo)
{
ParameterInfo[] parameters = method.GetParameters();
// First parameter is always player
if (parameters.Length == 0 || parameters[0].ParameterType != typeof(Player))
{
Log.Error("CommandsBuilder", string.Format("{0}.{1} command must expect the player as first parameter.", method.DeclaringType.Name, method.Name));
return(null);
}
bool hasTargetParam = HasTargetParameter(parameters); // Second can be target
int startIndex = hasTargetParam ? 2 : 1;
// Other parameters
for (int i = startIndex; i < parameters.Length; i++)
{
if (!CheckParameter(parameters[i]))
{
return(null);
}
}
// Method invokation handler
GmCommandHandler.GmComHandler del = (Player player, ref List <string> rawValues) => {
return(Invoke(method, player, rawValues));
};
// Method declaration
string description = string.Concat(CommandToString(parameters[0]), " : ", commandInfo.Description);
GmCommandHandler handler = new GmCommandHandler(
method.Name.ToLowerInvariant(), del, null, commandInfo.AccessRequired, -1, description);
return(handler);
}
/// <summary>
/// Builds a list of commands using reflexion on the given class.
/// </summary>
/// <param name="type"></param>
/// <param name="declarative"></param>
/// <returns></returns>
public static List <GmCommandHandler> BuildCommands(Type type, params GmCommandHandler[] declarative)
{
List <GmCommandHandler> list = new List <GmCommandHandler>();
list.AddRange(declarative); // Optional declarative commands hard coded by invoker
foreach (MethodInfo method in type.GetMethods(BindingFlags.Static | BindingFlags.Public))
{
object[] attributes = method.GetCustomAttributes(typeof(CommandAttribute), false);
if (attributes.Length == 1)
{
GmCommandHandler handler = CreateCommand(method, (CommandAttribute)attributes[0]);
if (handler != null)
{
list.Add(handler);
}
}
}
return(list);
}
