Command shorthand, ie `!hello:world` => `!hw`.

src/main/java/net/pingex/discordbot/Command.java

@@ -18,4 +18,9 @@ public @interface Command
 	 * Minimum number of arguments expected
 	 */
 	int minArgs() default 0;
+
+	/**
+	 * Shortened command
+	 */
+	String shorthand() default "";
 }

src/main/java/net/pingex/discordbot/CommandDispatcher.java

@@ -27,6 +27,11 @@ public class CommandDispatcher
 	 */
 	private HashMap<String, InvokableMethod> commandList;
 
+	/**
+	 * Contains all the shorthanded commands
+	 */
+	private HashMap<String, String> shortList;
+
 	/**
 	 * Basic Constructor, automatically rebuilds command list from the modules registry
 	 */
@@ -43,24 +48,26 @@ public class CommandDispatcher
 	@EventSubscriber
 	public void onMessageReceivedEvent(MessageReceivedEvent event)
 	{
-		Matcher m = Pattern.compile("^!(\\w+):(\\w+)(?: (.*))?$").matcher(event.getMessage().getContent()); // TODO: Custom command prefix
+		// Command matcher
+		Matcher m = Pattern.compile("^!([:\\w]+)(?: (.*))?$").matcher(event.getMessage().getContent());
 		if(!m.matches()) return; // We don't need to go further if it's not even a command
-
+		String fullCommand = m.group(1);
-		String module = m.group(1);
-		String command = m.group(2);
-		String fullCommand = module + ":" + command;
 
 		// Arg splitter
-		Matcher am = Pattern.compile("([^\"]\\S*|\".+?\")\\s*").matcher((m.group(3) != null) ? m.group(3) : "");
+		Matcher am = Pattern.compile("([^\"]\\S*|\".+?\")\\s*").matcher((m.group(2) != null) ? m.group(2) : "");
 		ArrayList<String> args = new ArrayList<>();
 		while(am.find()) args.add(am.group(1).replace("\"", ""));
 
-		logger.info("Command invoked (" + event.getMessage().getAuthor().getName() + "#" + event.getMessage().getAuthor().getDiscriminator() + "): " + fullCommand);
+		// Shorthand matcher
+		if(!fullCommand.contains(":") && shortList.containsKey(fullCommand))
+			fullCommand = shortList.get(fullCommand);
 
 		try
 		{
 			if(commandList.containsKey(fullCommand))
 			{
+				logger.info("Command invoked (" + event.getMessage().getAuthor().getName() + "#" + event.getMessage().getAuthor().getDiscriminator() + "): " + fullCommand);
+
 				InvokableMethod foundMethod = commandList.get(fullCommand);
 				Object[] parsedArray = new Object[foundMethod.getMethod().getParameterCount()];
 				parsedArray[0] = event;
@@ -108,6 +115,7 @@ public class CommandDispatcher
 
 		ArrayList<AbstractModule> registry = ModulesRegistry.getRegistry();
 		commandList = new HashMap<>();
+		shortList = new HashMap<>();
 
 		for(AbstractModule i : registry)
 			if(i.getClass().isAnnotationPresent(Controllable.class))
@@ -118,7 +126,19 @@ public class CommandDispatcher
 						logger.info("Found " + id);
 
 						if(j.getParameterCount() >= 1 && j.getParameterTypes()[0] == MessageReceivedEvent.class && j.getReturnType() == String.class)
-							commandList.put(id, new InvokableMethod(j, i));
+							if(!commandList.containsKey(id))
+							{
+								commandList.put(id, new InvokableMethod(j, i));
+
+								// Eventual command shorthands
+								if(!j.getAnnotation(Command.class).shorthand().isEmpty())
+									if(!shortList.containsKey(j.getAnnotation(Command.class).shorthand()))
+										shortList.put(j.getAnnotation(Command.class).shorthand(), id);
+									else
+										logger.warning("Conflicting shorthand for command " + id);
+							}
+							else
+								logger.warning("Conflicting command " + id);
 						else
 							logger.warning("Command [" + id + "]: incorrect function prototype, thus won't be added to the command list.");
 					}