[Tuturial] Get player' render distance, language, and more

Hi, I was looking on the Minecraft packet list, and came across this packet
http://wiki.vg/Protocol#Client_Settings

Then I thought it would be cool to be able to obtain a player's language and such, so I created a ProtocolLib handler for this.

Code:java

ProtocolLibrary.getProtocolManager().addPacketListener(new PacketListener(){
            public Plugin getPlugin() {return Bukkit.getPluginManager().getPlugin("Amalthea");}
            public ListeningWhitelist getReceivingWhitelist() {return ListeningWhitelist.newBuilder().gamePhase(GamePhase.PLAYING).highest().types(PacketType.Play.Client.SETTINGS).build();}
            public ListeningWhitelist getSendingWhitelist() {return ListeningWhitelist.newBuilder().gamePhase(GamePhase.PLAYING).highest().types(PacketType.Play.Client.SETTINGS).build();}
            @SuppressWarnings("deprecation")
            @Override
            public void onPacketReceiving(PacketEvent e) {
                if (!(e.getPacket().getType() == PacketType.Play.Client.SETTINGS)) return;
                  int renderdistance = wrapper.getIntegers().readSafely(0);
                  int difficulty = wrapper.getIntegers().readSafely(2);
                  String language = wrapper.getStrings().readSafely(0);
                  // usually is en_US
                }
            }
            public void onPacketSending(PacketEvent e) {return;}
 
        });

This requires ProtocolLib which you can download here

 

Looks nice, but using TinyProtocol instead of ProtocolLib would make this way easier to implement it in our plugins I think.

 

Totally wow.

 

bigteddy98
I havent used TinyProtocol yet, but your more than welcome to use the packet structure or my code anywhere else on the web.

 

Nice! Did not know that it is possible to get the client's locale, view distance, chat flags, chat colours, difficulty and whether capes are shown or not. Interesting possibilities...

 

GermanCoding
Many possibilities. I've never seen this on a server before though.

 

I'm using this since a half year on my server It's pretty nice and user friendly to send messages in the users locale
Since i have lots of German and US players, I've created this little class

Code:java

public class language {
 
    public void broadcastMessage(String de,String en) {
        for (Player p : Bukkit.getServer().getOnlinePlayers()) {
 
            if (getLanguage(p).equalsIgnoreCase("de")) {
                p.sendMessage(de);
                } else {
                    p.sendMessage(en);
                }   
        }
    }
    public void sendMessage(Player p, String de,String en) {
        if (getLanguage(p).equalsIgnoreCase("de")) {
            p.sendMessage(de);
            } else {
                p.sendMessage(en);
            }   
    }
 
      private static String getLanguage(Player p){
          try {
          Object obj = getMethod("getHandle", p.getClass()).invoke(p, (Object[]) null);
          Field f = obj.getClass().getDeclaredField("locale");
          f.setAccessible(true);
          String language = (String) f.get(obj);
 
          if (language.equalsIgnoreCase("de_de")) {
              return "de";
          } else {
              return "en";
          }
          } catch (Exception e) {
              return "en";
            }
          }
 
      private static Method getMethod(String n, Class<?> c) {
      for (Method m : c.getDeclaredMethods()) {
      if (m.getName().equals(n))
      return m;
      }
      return null;
      }

It's alot more user friendy than having a global language for the plugins.

 

crysis992
One of the many possibilities of this packet

 

Plo124
Im just gunna bump this for others to see

Plo124
But, how do you get a player's chat size?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

BungeeTheCookie
I do not know it, but maybe in the chat flags byte?

 

BungeeTheCookie
Not everything is sent, otherwise I would like to see Resource packs, and Master volume being sent to the server.

 

Interesting, would be good for creating a language lib for plugins where instead of the server defining the language, the players define it with their settings.

 

Plo124
I really like your idea.
Sadly, I am not very good at protocollib.
Do you think you can make a LIB for this.
Something like.

player.getViewDistance()
player.isCapesEnabled()
etc..

This would be greatly appreciated!
- Blue

 

BlueMustache
You just need to store a HashMap<UUID,Integer> of the render distance.

 

Plo124
I know you could do that.
I guess I'll try ProtocolLib again.
Any good Tutorials on how to get started with it?

 

BlueMustache
You can execute code after the int renderdistance, and then use that to set the HashMap.

 

You know, Minecraft stores these in the EntityPlayer object. Go check it out.