Cleaned up CommandsPlugin, added CommandMap, new parameter declaration and aliases.

src/Discord.Net.Commands/CommandMap.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+
+namespace Discord.Commands
+{
+    internal class CommandMap
+	{
+		private CommandMap _parent;
+		private Command _command;
+		private readonly Dictionary<string, CommandMap> _subCommands;
+
+		public CommandMap(CommandMap parent)
+		{
+			_parent = parent;
+			_subCommands = new Dictionary<string, CommandMap>();
+		}
+
+		public CommandMap GetMap(string text)
+		{
+			CommandMap map;
+			if (_subCommands.TryGetValue(text, out map))
+				return map;
+			else
+				return null;
+		}
+
+		public Command GetCommand()
+		{
+			if (_command != null)
+				return _command;
+			else if (_parent != null)
+				return _parent.GetCommand();
+			else
+				return null;
+		}
+		public Command GetCommand(string text)
+		{
+			return GetCommand(0, text.Split(' '));
+		}
+		public Command GetCommand(int index, string[] parts)
+		{
+			if (index != parts.Length)
+			{
+				string nextPart = parts[index];
+				CommandMap nextGroup;
+				if (_subCommands.TryGetValue(nextPart, out nextGroup))
+				{
+					var cmd = nextGroup.GetCommand(index + 1, parts);
+					if (cmd != null)
+						return cmd;
+				}
+			}
+
+			if (_command != null)
+				return _command;
+			return null;
+		}
+
+		public void AddCommand(string text, Command command)
+		{
+			AddCommand(0, text.Split(' '), command);
+		}
+		public void AddCommand(int index, string[] parts, Command command)
+		{
+			if (index != parts.Length)
+			{
+				string nextPart = parts[index];
+				CommandMap nextGroup;
+				if (!_subCommands.TryGetValue(nextPart, out nextGroup))
+				{
+					nextGroup = new CommandMap(this);
+					_subCommands.Add(nextPart, nextGroup);
+				}
+				nextGroup.AddCommand(index + 1, parts, command);
+            }
+			else
+			{
+				if (_command != null)
+					throw new InvalidOperationException("A command has already been added with this path.");
+				_command = command;
+			}
+		}
+	}
+}