Added some files.

plugin.yml

@@ -0,0 +1,8 @@
+name: PureChat
+main: _64FF00\PureChat\PureChat
+version: "1.0.0"
+api: [1.9.0]
+load: STARTUP
+author: 64FF00
+website: https://github.com/64FF00/PureChat
+depend: [PurePerms]

resources/config.yml

@@ -0,0 +1,3 @@
+---
+chat-format: "<[%group%] %user_name%}> %message%"
+...

src/_64FF00/PureChat/ChatListener.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace _64FF00\PureChat;
+
+use pocketmine\event\Listener;
+
+use pocketmine\event\player\PlayerChatEvent;
+
+/*
+      # #    #####  #       ####### #######   ###     ###   
+      # #   #     # #    #  #       #        #   #   #   #  
+    ####### #       #    #  #       #       #     # #     # 
+      # #   ######  #    #  #####   #####   #     # #     # 
+    ####### #     # ####### #       #       #     # #     # 
+      # #   #     #      #  #       #        #   #   #   #  
+      # #    #####       #  #       #         ###     ###                                        
+                                                                                   
+*/
+
+class ChatListener implements Listener
+{
+	public function __construct(PureChat $plugin)
+	{
+		$this->plugin = $plugin;
+	}
+
+	public function onPlayerChat(PlayerChatEvent $event)
+	{
+		$player = $event->getPlayer();
+
+		$chatFormat = $this->plugin->formatMessage($player, $event->getMessage());
+
+		$event->setFormat($chatFormat);
+	}
+}

src/_64FF00/PureChat/Configuration.php

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+<?php
+namespace _64FF00\PureChat;
+
+use pocketmine\utils\Config;
+
+class Configuration
+{
+	private $config;
+
+	public function __construct(PureChat $plugin)
+	{
+		$this->plugin = $plugin;
+
+		$this->loadConfig();
+	}
+
+	public function getValue($key)
+	{
+		$value = $this->config->get($key);
+
+		if($value === null)
+		{
+			$this->plugin->getLogger()->warning("Key $key not found in config.yml.");
+
+			return null;
+		}
+
+		return $value;
+	}
+
+	public function loadConfig()
+	{
+		$this->plugin->saveDefaultConfig();
+
+		$this->config = $this->plugin->getConfig();
+	}
+
+	public function reloadConfig()
+	{	
+		$this->plugin->reloadConfig();
+
+		$this->loadConfig();
+	}
+}

src/_64FF00/PureChat/PureChat.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace _64FF00\PureChat;
+
+use pocketmine\Player;
+
+use pocketmine\plugin\PluginBase;
+
+/*
+      # #    #####  #       ####### #######   ###     ###   
+      # #   #     # #    #  #       #        #   #   #   #  
+    ####### #       #    #  #       #       #     # #     # 
+      # #   ######  #    #  #####   #####   #     # #     # 
+    ####### #     # ####### #       #       #     # #     # 
+      # #   #     #      #  #       #        #   #   #   #  
+      # #    #####       #  #       #         ###     ###                                        
+                                                                                   
+*/
+
+class PureChat extends PluginBase
+{
+	private $config, $plugin;
+
+	public function onLoad()
+	{
+		$this->config = new Configuration($this);
+	}
+
+	public function onEnable()
+	{
+		$this->plugin = $this->getServer()->getPluginManager()->getPlugin("PurePerms");
+
+		$this->getServer()->getPluginManager()->registerEvents(new ChatListener($this), $this);
+	}
+
+	public function formatMessage(Player $player, $message)
+	{
+		$chatFormat = $this->config->getValue("chat-format");
+
+		$isMultiWorldPermsEnabled = $this->plugin->getPPConfig()->getValue("enable-multiworld-perms");
+
+		$levelName = $isMultiWorldPermsEnabled ? $player->getLevel()->getName() : null;
+
+		$chatFormat = str_replace("%world_name%", $levelName, $chatFormat);
+		$chatFormat = str_replace("%user_name%", $player->getName(), $chatFormat);		
+		$chatFormat = str_replace("%message%", $message, $chatFormat);
+
+		$group = $this->plugin->getUser($player)->getGroup($levelName);
+
+		$chatFormat = str_replace("%group%", $group->getName(), $chatFormat);
+
+		return $chatFormat;
+	}
+
+	public function onDisable()
+	{
+	}
+}