From 28564384609daf7362365238e390e11678368026 Mon Sep 17 00:00:00 2001
From: Pingex <pingex@pingex.net>
Date: Sat, 7 May 2016 21:02:41 +0200
Subject: [PATCH] List of commands command and command description.

---
 .../java/net/pingex/discordbot/Command.java   |  5 ++
 .../discordbot/InternalCommandsModule.java    | 51 ++++++++++++++++++-
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/src/main/java/net/pingex/discordbot/Command.java b/src/main/java/net/pingex/discordbot/Command.java
index 29d55b7..e40c216 100644
--- a/src/main/java/net/pingex/discordbot/Command.java
+++ b/src/main/java/net/pingex/discordbot/Command.java
@@ -28,4 +28,9 @@ public @interface Command
 	 * Default permission for this command
 	 */
 	DefaultPermission permission() default DefaultPermission.EVERYONE;
+
+	/**
+	 * Description of the command
+	 */
+	String description() default "No description provided for this command.";
 }
diff --git a/src/main/java/net/pingex/discordbot/InternalCommandsModule.java b/src/main/java/net/pingex/discordbot/InternalCommandsModule.java
index 0cd84d4..c743d34 100644
--- a/src/main/java/net/pingex/discordbot/InternalCommandsModule.java
+++ b/src/main/java/net/pingex/discordbot/InternalCommandsModule.java
@@ -2,8 +2,7 @@ package net.pingex.discordbot;
 
 import sx.blah.discord.api.IDiscordClient;
 import sx.blah.discord.handle.impl.events.MessageReceivedEvent;
-
-import java.util.HashMap;
+import java.util.Map;
 
 /**
  * Internal commands of the bot, such as `help`, and so on
@@ -45,4 +44,52 @@ class InternalCommandsModule extends AbstractModule
 
 		return toReturn.toString();
 	}
+
+	/**
+	 * List all commands registered
+	 * @param page Page number
+	 * @return String representation of this command
+	 */
+	@Command(shorthand = "list", description = "List all commands available to you.")
+	public String list(MessageReceivedEvent event, int page)
+	{
+		Map<String, InvokableMethod> commands = CommandDispatcher.getInstance().getCommandList();
+		Map<String, String> shorthands = CommandDispatcher.getInstance().getShortList();
+
+		int pagesCount = (int) Math.ceil(commands.size()/10.0);
+		if(page > pagesCount || page <= 0)
+			return "Page doesn't exist. " + pagesCount + " pages are available.";
+
+		StringBuffer toReturn = new StringBuffer("List of commands ");
+		toReturn.append("(page ").append(page).append("/").append(pagesCount).append(")\n");
+
+		int pos = 1;
+		for(Map.Entry<String, InvokableMethod> i : commands.entrySet())
+		{
+			if(pos > page*10-10 && pos <= page*10)
+			{
+				toReturn.append("- ").append(i.getKey());
+				for(Class<?> j : i.getValue().getMethod().getParameterTypes())
+					if(j != MessageReceivedEvent.class)
+						toReturn.append(" <").append(j.getName()).append(">");
+				toReturn.append("\t\t").append(i.getValue().getMethod().getAnnotation(Command.class).description());
+
+				// Shorthand
+				if(shorthands.containsValue(i.getKey()))
+				{
+					toReturn.append(" (shorthand: ");
+					for(Map.Entry<String, String> j : shorthands.entrySet())
+						if(j.getValue().equals(i.getKey()))
+						{
+							toReturn.append(j.getKey());
+							break;
+						}
+					toReturn.append(")");
+				}
+				toReturn.append("\n");
+			}
+			pos++;
+		}
+		return toReturn.toString();
+	}
 }