From cc83e33f532f509f23465002f69b817e51c5e705 Mon Sep 17 00:00:00 2001
From: Alexander <Alexander@Leuchtbook3000>
Date: Mon, 8 Jul 2019 18:49:07 +0200
Subject: [PATCH] Add HelpCmd

---
 .../java/net/wurstclient/command/CmdList.java |  3 +-
 .../java/net/wurstclient/command/Command.java | 15 ++--
 .../net/wurstclient/commands/HelpCmd.java     | 75 +++++++++++++++++++
 3 files changed, 87 insertions(+), 6 deletions(-)
 create mode 100644 src/main/java/net/wurstclient/commands/HelpCmd.java

diff --git a/src/main/java/net/wurstclient/command/CmdList.java b/src/main/java/net/wurstclient/command/CmdList.java
index 6a6cac1c..76ff93ec 100644
--- a/src/main/java/net/wurstclient/command/CmdList.java
+++ b/src/main/java/net/wurstclient/command/CmdList.java
@@ -13,6 +13,7 @@ import java.util.TreeMap;
 
 import net.minecraft.util.crash.CrashException;
 import net.minecraft.util.crash.CrashReport;
+import net.wurstclient.commands.HelpCmd;
 
 public final class CmdList
 {
@@ -35,7 +36,7 @@ public final class CmdList
 	// public final GiveCmd giveCmd = new GiveCmd();
 	// public final GmCmd gmCmd = new GmCmd();
 	// public final GoToCmd goToCmd = new GoToCmd();
-	// public final HelpCmd HhelpCmd = new HelpCmd();
+	public final HelpCmd helpCmd = new HelpCmd();
 	// public final InvseeCmd invseeCmd = new InvseeCmd();
 	// public final IpCmd ipCmd = new IpCmd();
 	// public final JumpCmd jumpCmd = new JumpCmd();
diff --git a/src/main/java/net/wurstclient/command/Command.java b/src/main/java/net/wurstclient/command/Command.java
index a8368134..ffe4d950 100644
--- a/src/main/java/net/wurstclient/command/Command.java
+++ b/src/main/java/net/wurstclient/command/Command.java
@@ -10,6 +10,7 @@ package net.wurstclient.command;
 import java.util.Objects;
 
 import net.wurstclient.Feature;
+import net.wurstclient.util.ChatUtils;
 
 public abstract class Command extends Feature
 {
@@ -35,13 +36,17 @@ public abstract class Command extends Feature
 		return name;
 	}
 	
-	public final String getDescription()
-	{
-		return description;
-	}
-	
 	public final String[] getSyntax()
 	{
 		return syntax;
 	}
+	
+	public final void printHelp()
+	{
+		for(String line : description.split("\n"))
+			ChatUtils.message(line);
+		
+		for(String line : syntax)
+			ChatUtils.message(line);
+	}
 }
diff --git a/src/main/java/net/wurstclient/commands/HelpCmd.java b/src/main/java/net/wurstclient/commands/HelpCmd.java
new file mode 100644
index 00000000..6ca155fe
--- /dev/null
+++ b/src/main/java/net/wurstclient/commands/HelpCmd.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2014 - 2019 | Wurst-Imperium | All rights reserved.
+ *
+ * This source code is subject to the terms of the GNU General Public
+ * License, version 3. If a copy of the GPL was not distributed with this
+ * file, You can obtain one at: https://www.gnu.org/licenses/gpl-3.0.txt
+ */
+package net.wurstclient.commands;
+
+import java.util.ArrayList;
+
+import net.wurstclient.command.CmdException;
+import net.wurstclient.command.CmdSyntaxError;
+import net.wurstclient.command.Command;
+import net.wurstclient.util.ChatUtils;
+import net.wurstclient.util.MathUtils;
+
+public final class HelpCmd extends Command
+{
+	private static final int CMDS_PER_PAGE = 8;
+	
+	public HelpCmd()
+	{
+		super("help", "Shows help for a command or a list of commands.",
+			".help <command>", "List commands: .help [<page>]");
+	}
+	
+	@Override
+	public void call(String[] args) throws CmdException
+	{
+		if(args.length > 1)
+			throw new CmdSyntaxError(this);
+		
+		String arg = args.length > 0 ? args[0] : "1";
+		
+		if(MathUtils.isInteger(arg))
+			listCommands(Integer.parseInt(arg));
+		else
+			help(arg);
+	}
+	
+	private void listCommands(int page) throws CmdException
+	{
+		ArrayList<Command> cmds = new ArrayList<>(WURST.getCmds().getAllCmds());
+		int pages = (int)Math.ceil(cmds.size() / (double)CMDS_PER_PAGE);
+		pages = Math.max(pages, 1);
+		
+		if(page > pages || page < 1)
+			throw new CmdSyntaxError(this, "Invalid page: " + page);
+		
+		String total = "Total: " + cmds.size() + " command";
+		total += cmds.size() != 1 ? "s" : "";
+		ChatUtils.message(total);
+		
+		int start = (page - 1) * CMDS_PER_PAGE;
+		int end = Math.min(page * CMDS_PER_PAGE, cmds.size());
+		
+		ChatUtils.message("Command list (page " + page + "/" + pages + ")");
+		for(int i = start; i < end; i++)
+			ChatUtils.message("- ." + cmds.get(i).getName());
+	}
+	
+	private void help(String cmdName) throws CmdException
+	{
+		if(cmdName.startsWith("."))
+			cmdName = cmdName.substring(1);
+		
+		Command cmd = WURST.getCmds().getCmdByName(cmdName);
+		if(cmd == null)
+			throw new CmdSyntaxError(this, "Unknown command: ." + cmdName);
+		
+		ChatUtils.message("Available help for ." + cmdName + ":");
+		cmd.printHelp();
+	}
+}