Added Events, Commands and Plugins

.classpath

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="src" output="target/classes" path="src">
-		<attributes>
-			<attribute name="optional" value="true"/>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="output" path="target/classes"/>
-</classpath>

.project

@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<projectDescription>
-	<name>Limbo</name>
-	<comment></comment>
-	<projects>
-	</projects>
-	<buildSpec>
-		<buildCommand>
-			<name>org.eclipse.jdt.core.javabuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.m2e.core.maven2Builder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-	</buildSpec>
-	<natures>
-		<nature>org.eclipse.m2e.core.maven2Nature</nature>
-		<nature>org.eclipse.jdt.core.javanature</nature>
-	</natures>
-</projectDescription>

src/com/loohp/limbo/Commands/CommandExecutor.java

@@ -0,0 +1,7 @@
+package com.loohp.limbo.Commands;
+
+public interface CommandExecutor {
+	
+	public void execute(CommandSender sender, String[] args);
+
+}

src/com/loohp/limbo/Commands/CommandSender.java

@@ -0,0 +1,17 @@
+package com.loohp.limbo.Commands;
+
+import net.md_5.bungee.api.chat.BaseComponent;
+
+public interface CommandSender {
+	
+	public void sendMessage(BaseComponent[] component);
+	
+	public void sendMessage(BaseComponent component);
+	
+	public void sendMessage(String message);
+	
+	public boolean hasPermission(String permission);
+	
+	public String getName();
+
+}

src/com/loohp/limbo/Commands/TabCompletor.java

@@ -0,0 +1,9 @@
+package com.loohp.limbo.Commands;
+
+import java.util.List;
+
+public interface TabCompletor {
+	
+	public List<String> tabComplete(CommandSender sender, String[] args);
+
+}

src/com/loohp/limbo/Console.java

@@ -1,6 +1,8 @@
 package com.loohp.limbo;
 
 import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -10,19 +12,54 @@ import java.text.SimpleDateFormat;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.Locale;
+import java.util.stream.Collectors;
 
-import com.loohp.limbo.Player.Player;
+import com.loohp.limbo.Commands.CommandSender;
 import com.loohp.limbo.Utils.CustomStringUtils;
 
-public class Console {
+import net.md_5.bungee.api.chat.BaseComponent;
+
+public class Console implements CommandSender {
 	
 	private InputStream in;
 	private PrintStream out;
+	@SuppressWarnings("unused")
+	private PrintStream err;
+	protected PrintStream logs;
 	
-	public Console(InputStream in, PrintStream out) {
+	private final String CONSOLE = "CONSOLE";
+	
+	public Console(InputStream in, PrintStream out, PrintStream err) throws FileNotFoundException {
+		String fileName = new SimpleDateFormat("yyyy'-'MM'-'dd'_'HH'-'mm'-'ss'_'zzz'.log'").format(new Date());
+        File dir = new File("logs");
+        dir.mkdirs();
+        File logs = new File(dir, fileName);
+        this.logs = new PrintStream(logs);
+        
+		System.setIn(in);
 		this.in = in;
-		System.setOut(new ConsoleOutputStream(out));
+		System.setOut(new ConsoleOutputStream(out, this.logs));
 		this.out = System.out;
+		System.setErr(new ConsoleErrorStream(err, this.logs));
+		this.err = System.err;
+	}
+	
+	public String getName() {
+		return CONSOLE;
+	}
+
+	@Override
+	public void sendMessage(BaseComponent component) {
+		sendMessage(new BaseComponent[] {component});
+	}
+	
+	@Override
+	public void sendMessage(BaseComponent[] component) {
+		sendMessage(String.join("", Arrays.asList(component).stream().map(each -> each.toLegacyText()).collect(Collectors.toList())));
+	}
+	
+	public boolean hasPermission(String permission) {
+		return Limbo.getInstance().getPermissionsManager().hasPermission(this, permission);
 	}
 	
 	public void sendMessage(String message) {
@@ -33,115 +70,199 @@ public class Console {
 		BufferedReader reader = new BufferedReader(new InputStreamReader(in));
 		while (true) {
 			try {
-				String[] input = CustomStringUtils.splitStringToArgs(reader.readLine());
-				
-				if (input[0].equalsIgnoreCase("stop")) {
-					Limbo.getInstance().stopServer();
-				} else if (input[0].equalsIgnoreCase("say")) {
-					if (input.length > 1) {
-						String message = "[Server] " + String.join(" ", Arrays.copyOfRange(input, 1, input.length));
-						sendMessage(message);
-						for (Player each : Limbo.getInstance().getPlayers()) {
-							each.sendMessage(message);
-						}
-					}
-				} else if (input[0].equalsIgnoreCase("kick")) {
-					String reason = "Disconnected!";
-					Player player = input.length > 1 ? Limbo.getInstance().getPlayer(input[1]) : null;
-					if (player != null) {
-						if (input.length < 2) {
-							player.disconnect();
-						} else {
-							reason = String.join(" ", Arrays.copyOfRange(input, 2, input.length));
-							player.disconnect(reason);
-						}
-						sendMessage("Kicked the player " + input[1] + " for the reason: " + reason);
-					} else {
-						sendMessage("Player is not online!");
-					}
-				}
+				String[] input = CustomStringUtils.splitStringToArgs(reader.readLine());				
+				Limbo.getInstance().dispatchCommand(this, input);
 			} catch (IOException e) {
 				e.printStackTrace();
 			}
 		}
 	}
 	
-	public class ConsoleOutputStream extends PrintStream {
+	public static class ConsoleOutputStream extends PrintStream {
 		
-		public ConsoleOutputStream(OutputStream out) {
+		private PrintStream logs;
+		
+		public ConsoleOutputStream(OutputStream out, PrintStream logs) {
 	        super(out);
+	        this.logs = logs;
 	    }
 
 		@Override
 		public PrintStream printf(Locale l, String format, Object... args) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-			return super.printf(l, "[" + date + "] " + format, args);
+			logs.printf(l, "[" + date + " INFO]" + format, args);
+			return super.printf(l, "[" + date + " INFO]" + format, args);
 		}
 
 		@Override
 		public PrintStream printf(String format, Object... args) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-			return super.printf("[" + date + "] " + format, args);
+			logs.printf("[" + date + " INFO]" + format, args);
+			return super.printf("[" + date + " INFO]" + format, args);
 		}
 
 		@Override
 		public void println() {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] ");
+			logs.println("[" + date + " INFO]");
+	        super.println("[" + date + " INFO]");
 		}
 
 		@Override
 		public void println(boolean x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 		@Override
 		public void println(char x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 		@Override
 		public void println(char[] x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + String.valueOf(x));
+			logs.println("[" + date + " INFO]" + String.valueOf(x));
+	        super.println("[" + date + " INFO]" + String.valueOf(x));
 		}
 
 		@Override
 		public void println(double x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 		@Override
 		public void println(float x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 		@Override
 		public void println(int x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 		@Override
 		public void println(long x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 		@Override
 		public void println(Object x) {
 			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + x);
+			logs.println("[" + date + " INFO]" + x);
+	        super.println("[" + date + " INFO]" + x);
 		}
 
 	    @Override
 	    public void println(String string) {
 	    	String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
-	        super.println("[" + date + "] " + string);
+	    	logs.println("[" + date + " INFO] " + string);
+	        super.println("[" + date + " INFO] " + string);
+	    }
+	}
+	
+	public static class ConsoleErrorStream extends PrintStream {
+		
+		private PrintStream logs;
+		
+		public ConsoleErrorStream(OutputStream out, PrintStream logs) {
+	        super(out);
+	        this.logs = logs;
+	    }
+
+		@Override
+		public PrintStream printf(Locale l, String format, Object... args) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.printf(l, "[" + date + " Error]" + format, args);
+			return super.printf(l, "[" + date + " Error]" + format, args);
+		}
+
+		@Override
+		public PrintStream printf(String format, Object... args) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.printf("[" + date + " Error]" + format, args);
+			return super.printf("[" + date + " Error]" + format, args);
+		}
+
+		@Override
+		public void println() {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]");
+	        super.println("[" + date + " Error]");
+		}
+
+		@Override
+		public void println(boolean x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+		@Override
+		public void println(char x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+		@Override
+		public void println(char[] x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + String.valueOf(x));
+	        super.println("[" + date + " Error]" + String.valueOf(x));
+		}
+
+		@Override
+		public void println(double x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+		@Override
+		public void println(float x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+		@Override
+		public void println(int x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+		@Override
+		public void println(long x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+		@Override
+		public void println(Object x) {
+			String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+			logs.println("[" + date + " Error]" + x);
+	        super.println("[" + date + " Error]" + x);
+		}
+
+	    @Override
+	    public void println(String string) {
+	    	String date = new SimpleDateFormat("HH':'mm':'ss").format(new Date());
+	    	logs.println("[" + date + " Error] " + string);
+	        super.println("[" + date + " Error] " + string);
 	    }
 	}
 

src/com/loohp/limbo/DeclareCommands.java

@@ -2,27 +2,50 @@ package com.loohp.limbo;
 
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
-import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.List;
 
+import com.loohp.limbo.Commands.CommandSender;
 import com.loohp.limbo.Server.Packets.PacketPlayOutDeclareCommands;
 import com.loohp.limbo.Utils.DataTypeIO;
 
 public class DeclareCommands {
 	
-	public static PacketPlayOutDeclareCommands getDeclareCommandPacket() throws IOException {
+	public static PacketPlayOutDeclareCommands getDeclareCommandsPacket(CommandSender sender) throws Exception {
+		List<String> commands = Limbo.getInstance().getPluginManager().getTabOptions(sender, new String[0]);
+		
+		if (commands.isEmpty()) {
+			return null;
+		}
+		
 		ByteArrayOutputStream buffer = new ByteArrayOutputStream();		
 		DataOutputStream output = new DataOutputStream(buffer);
 
-		DataTypeIO.writeVarInt(output, 2);
+		DataTypeIO.writeVarInt(output, commands.size() * 2 + 1);
 		
 		output.writeByte(0);
-		DataTypeIO.writeVarInt(output, 1);
-		DataTypeIO.writeVarInt(output, 1);
+		DataTypeIO.writeVarInt(output, commands.size());
+		for (int i = 1; i <= commands.size() * 2; i++) {
+			DataTypeIO.writeVarInt(output, i++);
+		}
 		
-		output.writeByte(1 | 0x04);
-		DataTypeIO.writeVarInt(output, 0);
-		DataTypeIO.writeString(output, "spawn", StandardCharsets.UTF_8);
+		int i = 1;
+		for (String label : commands) {
+			output.writeByte(1 | 0x04);
+			DataTypeIO.writeVarInt(output, 1);
+			DataTypeIO.writeVarInt(output, i + 1);
+			DataTypeIO.writeString(output, label, StandardCharsets.UTF_8);
+			i++;
+			
+			output.writeByte(2 | 0x04 | 0x10);
+			DataTypeIO.writeVarInt(output, 1);
+			DataTypeIO.writeVarInt(output, i);
+			DataTypeIO.writeString(output, "arg", StandardCharsets.UTF_8);
+			DataTypeIO.writeString(output, "brigadier:string", StandardCharsets.UTF_8);
+			DataTypeIO.writeVarInt(output, 0);
+			DataTypeIO.writeString(output, "minecraft:ask_server", StandardCharsets.UTF_8);
+			i++;
+		}
 		
 		DataTypeIO.writeVarInt(output, 0);
 		

src/com/loohp/limbo/Events/Cancellable.java

@@ -0,0 +1,9 @@
+package com.loohp.limbo.Events;
+
+public interface Cancellable {
+	
+	public void setCancelled(boolean cancelled);
+	
+	public boolean isCancelled();
+
+}

src/com/loohp/limbo/Events/Event.java

@@ -0,0 +1,5 @@
+package com.loohp.limbo.Events;
+
+public abstract class Event {
+
+}

src/com/loohp/limbo/Events/EventHandler.java

@@ -0,0 +1,14 @@
+package com.loohp.limbo.Events;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Documented
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME) 
+public @interface EventHandler { 
+	EventPriority priority() default EventPriority.NORMAL;    
+}

src/com/loohp/limbo/Events/EventPriority.java

@@ -0,0 +1,37 @@
+package com.loohp.limbo.Events;
+
+public enum EventPriority {
+	LOWEST(0),
+	LOW(1),
+	NORMAL(2),
+	HIGH(3),
+	HIGHEST(4),
+	MONITOR(5);
+	
+	int order;
+	
+	EventPriority(int order) {
+		this.order = order;
+	}
+	
+	public int getOrder() {
+		return order;
+	}
+	
+	public static EventPriority getByOrder(int order) {
+		for (EventPriority each : EventPriority.values()) {
+			if (each.getOrder() == order) {
+				return each;
+			}
+		}
+		return null;
+	}
+	
+	public static EventPriority[] getPrioritiesInOrder() {
+		EventPriority[] array = new EventPriority[EventPriority.values().length];
+		for (int i = 0; i < array.length; i++) {
+			array[i] = EventPriority.getByOrder(i);
+		}
+		return array;
+	}
+}

src/com/loohp/limbo/Events/EventsManager.java

@@ -0,0 +1,58 @@
+package com.loohp.limbo.Events;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.loohp.limbo.Plugins.LimboPlugin;
+
+public class EventsManager {
+	
+	private List<ListenerPair> listeners;
+	
+	public EventsManager() {
+		listeners = new ArrayList<>();
+	}
+	
+	public Event callEvent(Event event) {
+		for (EventPriority priority : EventPriority.getPrioritiesInOrder()) {
+			for (ListenerPair entry : listeners) {
+				Listener listener = entry.listener;
+				for (Method method : listener.getClass().getMethods()) {
+					if (method.isAnnotationPresent(EventHandler.class)) {
+						if (method.getAnnotation(EventHandler.class).priority().equals(priority)) {
+							if (method.getParameterCount() == 1 && method.getParameterTypes()[0].equals(event.getClass())) {
+								try {
+									method.invoke(listener, event);
+								} catch (Exception e) {
+									System.err.println("Error while passing " + event.getClass().getCanonicalName() + " to the plugin \"" + entry.plugin.getName() + "\"");
+									e.printStackTrace();
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+		return event;
+	}
+	
+	public void registerEvents(LimboPlugin plugin, Listener listener) {
+		listeners.add(new ListenerPair(plugin, listener));
+	}
+	
+	public void unregisterAllListeners(LimboPlugin plugin) {
+		listeners.removeIf(each -> each.plugin.equals(plugin));
+	}
+	
+	protected static class ListenerPair {
+		public LimboPlugin plugin;
+		public Listener listener;
+		
+		public ListenerPair(LimboPlugin plugin, Listener listener) {
+			this.plugin = plugin;
+			this.listener = listener;
+		}
+	}
+
+}

src/com/loohp/limbo/Events/Listener.java

@@ -0,0 +1,5 @@
+package com.loohp.limbo.Events;
+
+public interface Listener {
+
+}

src/com/loohp/limbo/Events/PlayerChatEvent.java

@@ -0,0 +1,49 @@
+package com.loohp.limbo.Events;
+
+import com.loohp.limbo.Player.Player;
+
+public class PlayerChatEvent extends PlayerEvent implements Cancellable {
+
+	private String prefix;
+	private String message;
+	private boolean cancelled;
+
+	public PlayerChatEvent(Player player, String prefix, String message, boolean cancelled) {
+		this.player = player;
+		this.prefix = prefix;
+		this.message = message;
+		this.cancelled = cancelled;
+	}
+
+	@Override
+	public Player getPlayer() {
+		return player;
+	}
+
+	public String getPrefix() {
+		return prefix;
+	}
+
+	public void setPrefix(String prefix) {
+		this.prefix = prefix;
+	}
+
+	public String getMessage() {
+		return message;
+	}
+
+	public void setMessage(String message) {
+		this.message = message;
+	}
+
+	@Override
+	public void setCancelled(boolean cancelled) {
+		this.cancelled = cancelled;
+	}
+
+	@Override
+	public boolean isCancelled() {
+		return cancelled;
+	}
+
+}

src/com/loohp/limbo/Events/PlayerEvent.java

@@ -0,0 +1,11 @@
+package com.loohp.limbo.Events;
+
+import com.loohp.limbo.Player.Player;
+
+public abstract class PlayerEvent extends Event {
+	
+	protected Player player;
+	
+	public abstract Player getPlayer();
+
+}

src/com/loohp/limbo/Events/PlayerJoinEvent.java

@@ -0,0 +1,16 @@
+package com.loohp.limbo.Events;
+
+import com.loohp.limbo.Player.Player;
+
+public class PlayerJoinEvent extends PlayerEvent {
+	
+	public PlayerJoinEvent(Player player) {
+		this.player = player;
+	}
+
+	@Override
+	public Player getPlayer() {
+		return player;
+	}
+
+}

src/com/loohp/limbo/Events/PlayerLoginEvent.java

@@ -0,0 +1,41 @@
+package com.loohp.limbo.Events;
+
+import com.loohp.limbo.Server.ClientConnection;
+
+import net.md_5.bungee.api.chat.BaseComponent;
+
+public class PlayerLoginEvent extends Event implements Cancellable {
+	
+	private ClientConnection connection;
+	private boolean cancelled;
+	private BaseComponent[] cancelReason;
+	
+	public PlayerLoginEvent(ClientConnection connection, boolean cancelled, BaseComponent... cancelReason) {
+		this.connection = connection;
+		this.cancelled = cancelled;
+		this.cancelReason = cancelReason;
+	}
+
+	public ClientConnection getConnection() {
+		return connection;
+	}		
+
+	public BaseComponent[] getCancelReason() {
+		return cancelReason;
+	}
+
+	public void setCancelReason(BaseComponent... cancelReason) {
+		this.cancelReason = cancelReason;
+	}
+
+	@Override
+	public void setCancelled(boolean cancelled) {
+		this.cancelled = cancelled;
+	}
+
+	@Override
+	public boolean isCancelled() {
+		return cancelled;
+	}
+
+}

src/com/loohp/limbo/Events/PlayerQuitEvent.java

@@ -0,0 +1,16 @@
+package com.loohp.limbo.Events;
+
+import com.loohp.limbo.Player.Player;
+
+public class PlayerQuitEvent extends PlayerEvent {
+	
+	public PlayerQuitEvent(Player player) {
+		this.player = player;
+	}
+
+	@Override
+	public Player getPlayer() {
+		return player;
+	}
+
+}

src/com/loohp/limbo/File/FileConfiguration.java

@@ -3,27 +3,26 @@ package com.loohp.limbo.File;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
+import java.io.InputStream;
 import java.util.Map;
 
 import org.yaml.snakeyaml.Yaml;
 
 public class FileConfiguration {
 	
-	File file;
 	Map<String, Object> mapping;
 	
 	public FileConfiguration(File file) throws FileNotFoundException {
-		this.file = file;
-		reloadConfig();
+		reloadConfig(new FileInputStream(file));
 	}
 	
-	public FileConfiguration reloadConfig() {
-		try {
-			Yaml yml = new Yaml();
-			mapping = yml.load(new FileInputStream(file));
-		} catch (FileNotFoundException e) {
-			e.printStackTrace();
-		}
+	public FileConfiguration(InputStream input){
+		reloadConfig(input);
+	}
+	
+	public FileConfiguration reloadConfig(InputStream input) {
+		Yaml yml = new Yaml();
+		mapping = yml.load(input);
 		return this;
 	}
 	
@@ -35,6 +34,9 @@ public class FileConfiguration {
 			for (int i = 0; i < tree.length - 1; i++) {
 				map = (Map<String, Object>) map.get(tree[i]);
 			}
+			if (returnType.equals(String.class)) {
+				return (T) map.get(tree[tree.length - 1]).toString();
+			}
 			return returnType.cast(map.get(tree[tree.length - 1]));
 		} catch (Exception e) {
 			return null;

src/com/loohp/limbo/Limbo.java

@@ -19,13 +19,19 @@ import org.json.simple.JSONObject;
 import org.json.simple.parser.JSONParser;
 import org.json.simple.parser.ParseException;
 
+import com.loohp.limbo.Commands.CommandSender;
+import com.loohp.limbo.Events.EventsManager;
 import com.loohp.limbo.File.ServerProperties;
 import com.loohp.limbo.Location.Location;
+import com.loohp.limbo.Permissions.PermissionsManager;
 import com.loohp.limbo.Player.Player;
+import com.loohp.limbo.Plugins.LimboPlugin;
+import com.loohp.limbo.Plugins.PluginManager;
 import com.loohp.limbo.Server.ServerConnection;
 import com.loohp.limbo.Server.Packets.Packet;
 import com.loohp.limbo.Server.Packets.PacketIn;
 import com.loohp.limbo.Server.Packets.PacketOut;
+import com.loohp.limbo.Utils.CustomStringUtils;
 import com.loohp.limbo.Utils.ImageUtils;
 import com.loohp.limbo.Utils.NetworkUtils;
 import com.loohp.limbo.World.Schematic;
@@ -57,13 +63,18 @@ public class Limbo {
 	
 	private ServerProperties properties;
 	
-	public AtomicInteger entityCount = new AtomicInteger();
+	private PluginManager pluginManager;
+	private EventsManager eventsManager;
+	private PermissionsManager permissionManager;
+	private File pluginFolder;
+	
+	public AtomicInteger entityIdCount = new AtomicInteger();
 	
 	@SuppressWarnings("unchecked")
 	public Limbo() throws IOException, ParseException, NumberFormatException, ClassNotFoundException {
 		instance = this;
 		
-		console = new Console(System.in, System.out);
+		console = new Console(System.in, System.out, System.err);
 		
 		String spName = "server.properties";
         File sp = new File(spName);
@@ -170,11 +181,52 @@ public class Limbo {
 			System.exit(2);
 		}
 		
+		String permissionName = "permission.yml";
+        File permissionFile = new File(permissionName);
+        if (!permissionFile.exists()) {
+        	try (InputStream in = getClass().getClassLoader().getResourceAsStream(permissionName)) {
+                Files.copy(in, permissionFile.toPath());
+            } catch (IOException e) {
+            	e.printStackTrace();
+            }
+        }
+        
+        permissionManager = new PermissionsManager();
+        permissionManager.loadDefaultPermissionFile(permissionFile);     
+        
+        eventsManager = new EventsManager();
+		
+		pluginFolder = new File("plugins");
+		pluginFolder.mkdirs();
+		
+		pluginManager = new PluginManager(pluginFolder);
+		
+		for (LimboPlugin plugin : Limbo.getInstance().getPluginManager().getPlugins()) {
+			console.sendMessage("Enabling plugin " + plugin.getName() + " " + plugin.getInfo().getVersion());
+			plugin.onEnable();
+		}
+		
 		server = new ServerConnection(properties.getServerIp(), properties.getServerPort());
 		
 		console.run();
 	}
 	
+	public EventsManager getEventsManager() {
+		return eventsManager;
+	}
+	
+	public PermissionsManager getPermissionsManager() {
+		return permissionManager;
+	}
+	
+	public File getPluginFolder() {
+		return pluginFolder;
+	}
+	
+	public PluginManager getPluginManager() {
+		return pluginManager;
+	}
+
 	private World loadDefaultWorld() throws IOException {
 		console.sendMessage("Loading world " + properties.getLevelName() + " with the schematic file " + properties.getSchemFileName() + " ...");
 		
@@ -260,7 +312,13 @@ public class Limbo {
 	}
 	
 	public void stopServer() {
-		Limbo.getInstance().getConsole().sendMessage("Stopping Server...");
+		console.sendMessage("Stopping Server...");
+		
+		for (LimboPlugin plugin : Limbo.getInstance().getPluginManager().getPlugins()) {
+			console.sendMessage("Disabling plugin " + plugin.getName() + " " + plugin.getInfo().getVersion());
+			plugin.onDisable();
+		}
+		
 		for (Player player : getPlayers()) {
 			player.disconnect("Server closed");
 		}
@@ -271,7 +329,34 @@ public class Limbo {
 				e.printStackTrace();
 			}
 		}
+		console.logs.close();
 		System.exit(0);
 	}
+	
+	public int getNextEntityId() {
+		if (entityIdCount.get() == Integer.MAX_VALUE) {
+			return entityIdCount.getAndSet(0);
+		} else {
+			return entityIdCount.getAndIncrement();
+		}
+	}
+	
+	public void dispatchCommand(CommandSender sender, String str) {
+		String[] command;
+		if (str.startsWith("/")) {
+			command = CustomStringUtils.splitStringToArgs(str.substring(1));
+		} else {
+			command = CustomStringUtils.splitStringToArgs(str);
+		}
+		dispatchCommand(sender, command);
+	}
+	
+	public void dispatchCommand(CommandSender sender, String... args) {
+		try {
+			Limbo.getInstance().getPluginManager().fireExecutors(sender, args);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
 
 }

src/com/loohp/limbo/Permissions/PermissionsManager.java

@@ -0,0 +1,64 @@
+package com.loohp.limbo.Permissions;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.loohp.limbo.Console;
+import com.loohp.limbo.Commands.CommandSender;
+import com.loohp.limbo.File.FileConfiguration;
+import com.loohp.limbo.Player.Player;
+
+public class PermissionsManager {
+	
+	private Map<String, List<String>> users;
+	private Map<String, List<String>> permissions;
+	
+	public PermissionsManager() {
+		users = new HashMap<>();
+		permissions = new HashMap<>();
+	}
+	
+	@SuppressWarnings("unchecked")
+	public void loadDefaultPermissionFile(File file) throws FileNotFoundException {
+		FileConfiguration config = new FileConfiguration(file);
+		for (Object obj : config.get("groups", Map.class).keySet()) {
+			String key = (String) obj;
+			List<String> nodes = new ArrayList<>();
+			nodes.addAll(config.get("groups." + key, List.class));
+			permissions.put(key, nodes);
+		}
+		for (Object obj : config.get("players", Map.class).keySet()) {
+			String key = (String) obj;
+			List<String> groups = new ArrayList<>();
+			groups.addAll(config.get("players." + key, List.class));
+			users.put(key, groups);
+		}
+	}
+	
+	public boolean hasPermission(CommandSender sender, String permission) {
+		if (sender instanceof Console) {
+			return true;
+		} else if (sender instanceof Player) {
+			Player player = (Player) sender;
+			if (users.get(player.getName()).stream().anyMatch(each -> permissions.get(each).stream().anyMatch(node -> node.equalsIgnoreCase(permission)))) {
+				return true;
+			} else {
+				return permissions.get("default").stream().anyMatch(node -> node.equalsIgnoreCase(permission));
+			}
+		}
+		return false;
+	}
+
+	public Map<String, List<String>> getUsers() {
+		return users;
+	}
+
+	public Map<String, List<String>> getPermissions() {
+		return permissions;
+	}
+
+}

src/com/loohp/limbo/Player/Player.java

@@ -3,6 +3,9 @@ package com.loohp.limbo.Player;
 import java.io.IOException;
 import java.util.UUID;
 
+import com.loohp.limbo.Limbo;
+import com.loohp.limbo.Commands.CommandSender;
+import com.loohp.limbo.Events.PlayerChatEvent;
 import com.loohp.limbo.Location.Location;
 import com.loohp.limbo.Server.ClientConnection;
 import com.loohp.limbo.Server.Packets.PacketPlayOutChat;
@@ -13,7 +16,7 @@ import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.api.chat.TextComponent;
 import net.md_5.bungee.chat.ComponentSerializer;
 
-public class Player {
+public class Player implements CommandSender {
 
 	public final ClientConnection clientConnection;
 
@@ -59,6 +62,10 @@ public class Player {
 	public UUID getUUID() {
 		return uuid;
 	}
+	
+	public boolean hasPermission(String permission) {
+		return Limbo.getInstance().getPermissionsManager().hasPermission(this, permission);
+	}
 
 	public void sendMessage(String message) {
 		sendMessage(TextComponent.fromLegacyText(message));
@@ -78,6 +85,7 @@ public class Player {
 		}
 	}
 
+	@Override
 	public void sendMessage(BaseComponent[] component) {
 		try {
 			PacketPlayOutChat chat = new PacketPlayOutChat(ComponentSerializer.toString(component), 0, new UUID(0, 0));
@@ -102,5 +110,17 @@ public class Player {
 	public void disconnect(BaseComponent[] reason) {
 		clientConnection.disconnect(reason);
 	}
+	
+	public void chat(String message) {
+		String prefix = "<" + username + "> ";
+		PlayerChatEvent event = (PlayerChatEvent) Limbo.getInstance().getEventsManager().callEvent(new PlayerChatEvent(this, prefix, message, false));
+		if (!event.isCancelled()) {
+			String chat = event.getPrefix() + event.getMessage();
+			Limbo.getInstance().getConsole().sendMessage(chat);
+			for (Player each : Limbo.getInstance().getPlayers()) {
+				each.sendMessage(chat);
+			}
+		}
+	}
 
 }

src/com/loohp/limbo/Plugins/LimboPlugin.java

@@ -0,0 +1,48 @@
+package com.loohp.limbo.Plugins;
+
+import java.io.File;
+
+import com.loohp.limbo.Limbo;
+import com.loohp.limbo.File.FileConfiguration;
+
+public class LimboPlugin {
+
+	private String name;
+	private File dataFolder;
+	private PluginInfo info;
+	
+	public final void setInfo(FileConfiguration file) {
+		info = new PluginInfo(file);
+		name = info.getName();
+		dataFolder = new File(Limbo.getInstance().getPluginFolder(), name);
+	}
+
+	public void onLoad() {
+
+	}
+
+	public void onEnable() {
+
+	}
+
+	public void onDisable() {
+
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public File getDataFolder() {
+		return new File(dataFolder.getAbsolutePath());
+	}
+	
+	public PluginInfo getInfo() {
+		return info;
+	}
+	
+	public Limbo getServer() {
+		return Limbo.getInstance();
+	}
+
+}

src/com/loohp/limbo/Plugins/PluginInfo.java

@@ -0,0 +1,41 @@
+package com.loohp.limbo.Plugins;
+
+import com.loohp.limbo.File.FileConfiguration;
+
+public class PluginInfo {
+	
+	private String name;
+	private String description;
+	private String author;
+	private String version;
+	private String main;
+	
+	public PluginInfo(FileConfiguration file) {
+		name = file.get("name", String.class);
+		description = file.get("description", String.class) == null ? "" : file.get("description", String.class);
+		author = file.get("author", String.class);
+		version = file.get("version", String.class);
+		main = file.get("main", String.class);
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public String getDescription() {
+		return description;
+	}
+	
+	public String getAuthor() {
+		return author;
+	}
+
+	public String getVersion() {
+		return version;
+	}
+
+	public String getMainClass() {
+		return main;
+	}
+
+}

src/com/loohp/limbo/Plugins/PluginManager.java

@@ -0,0 +1,140 @@
+package com.loohp.limbo.Plugins;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+import com.loohp.limbo.Limbo;
+import com.loohp.limbo.Commands.CommandExecutor;
+import com.loohp.limbo.Commands.CommandSender;
+import com.loohp.limbo.Commands.TabCompletor;
+import com.loohp.limbo.File.FileConfiguration;
+
+public class PluginManager {
+
+	private Map<String, LimboPlugin> plugins;
+	private List<Executor> executors;
+	private File pluginFolder;
+
+	public PluginManager(File pluginFolder) {
+		this.pluginFolder = pluginFolder;
+		this.executors = new ArrayList<>();
+
+		this.plugins = new LinkedHashMap<>();
+
+		for (File file : pluginFolder.listFiles()) {
+			if (file.isFile() && file.getName().endsWith(".jar")) {
+				boolean found = false;
+				try (ZipInputStream zip = new ZipInputStream(new FileInputStream(file))) {
+					while (true) {
+						ZipEntry entry = zip.getNextEntry();
+						if (entry == null) {
+							break;
+						}
+						String name = entry.getName();
+						if (name.endsWith("plugin.yml")) {
+							found = true;
+							
+							FileConfiguration pluginYaml = new FileConfiguration(zip);
+							String main = pluginYaml.get("main", String.class);
+							String pluginName = pluginYaml.get("name", String.class);
+							
+							if (plugins.containsKey(pluginName)) {
+								System.err.println("Ambiguous plugin name in " + file.getName() + " with the plugin \"" + plugins.get(pluginName).getClass().getName() + "\"");
+								break;
+							}
+							
+							URLClassLoader url = new URLClassLoader(new URL[] {file.toURI().toURL()});
+							Class<?> plugin = url.loadClass(main);
+							LimboPlugin clazz = (LimboPlugin) plugin.getDeclaredConstructor().newInstance();
+							clazz.setInfo(pluginYaml);
+							plugins.put(clazz.getName(), clazz);
+							clazz.onLoad();
+							System.out.println("Loading plugin " + file.getName() + " " + clazz.getInfo().getVersion() + " by " + clazz.getInfo().getAuthor());
+							url.close();
+							break;
+						}
+					}
+				} catch (Exception e) {
+					System.err.println("Unable to load plugin \"" + file.getName() + "\"");
+					e.printStackTrace();
+				}
+				if (!found) {
+					System.err.println("Jar file " + file.getName() + " has no plugin.yml!");
+				}
+			}
+		}
+	}
+	
+	public List<LimboPlugin> getPlugins() {
+		return new ArrayList<>(plugins.values());
+	}
+	
+	public LimboPlugin getPlugin(String name) {
+		return plugins.get(name);
+	}
+
+	public void fireExecutors(CommandSender sender, String[] args) throws Exception {
+		Limbo.getInstance().getConsole().sendMessage(sender.getName() + " executed server command: /" + String.join(" ", args));
+		for (Executor entry : executors) {
+			try {
+				entry.executor.execute(sender, args);
+			} catch (Exception e) {
+				System.err.println("Error while passing command \"" + args[0] + "\" to the plugin \"" + entry.plugin.getName() + "\"");
+				e.printStackTrace();
+			}
+		}
+	}
+
+	public List<String> getTabOptions(CommandSender sender, String[] args) throws Exception {
+		List<String> options = new ArrayList<>();
+		for (Executor entry : executors) {
+			if (entry.tab.isPresent()) {
+				try {
+					options.addAll(entry.tab.get().tabComplete(sender, args));
+				} catch (Exception e) {
+					System.err.println("Error while passing tab completion \"" + args[0] + "\" to the plugin \"" + entry.plugin.getName() + "\"");
+					e.printStackTrace();
+				}
+			}
+		}
+		return options;
+	}
+
+	public void registerCommands(LimboPlugin plugin, CommandExecutor executor) {
+		executors.add(new Executor(plugin, executor));
+	}
+
+	public void unregsiterAllCommands(LimboPlugin plugin) {
+		executors.removeIf(each -> each.plugin.equals(plugin));
+	}
+	
+	public File getPluginFolder() {
+		return new File(pluginFolder.getAbsolutePath());
+	}
+
+	protected static class Executor {
+		public LimboPlugin plugin;
+		public CommandExecutor executor;
+		public Optional<TabCompletor> tab;
+
+		public Executor(LimboPlugin plugin, CommandExecutor executor) {
+			this.plugin = plugin;
+			this.executor = executor;
+			if (executor instanceof TabCompletor) {
+				this.tab = Optional.of((TabCompletor) executor);
+			} else {
+				this.tab = Optional.empty();
+			}
+		}
+	}
+
+}

src/com/loohp/limbo/Server/ClientConnection.java

@@ -11,9 +11,13 @@ import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 
 import com.loohp.limbo.DeclareCommands;
 import com.loohp.limbo.Limbo;
+import com.loohp.limbo.Events.PlayerJoinEvent;
+import com.loohp.limbo.Events.PlayerLoginEvent;
+import com.loohp.limbo.Events.PlayerQuitEvent;
 import com.loohp.limbo.File.ServerProperties;
 import com.loohp.limbo.Location.Location;
 import com.loohp.limbo.Player.Player;
@@ -73,7 +77,7 @@ public class ClientConnection extends Thread {
 		DISCONNECTED;
 	}
 
-    private Socket client_socket;
+    private final Socket client_socket;
     private boolean running;
     private ClientState state;
     
@@ -83,15 +87,15 @@ public class ClientConnection extends Thread {
 	protected DataOutputStream output;
 	protected DataInputStream input;
 	
-	private InetAddress iNetAddress;
+	private InetAddress inetAddress;
 	
     public ClientConnection(Socket client_socket) {
         this.client_socket = client_socket;
-        this.iNetAddress = client_socket.getInetAddress();
+        this.inetAddress = client_socket.getInetAddress();
     }
 	
-	public InetAddress getiNetAddress() {
-		return iNetAddress;
+	public InetAddress getInetAddress() {
+		return inetAddress;
 	}
 
 	public long getLastKeepAlivePayLoad() {
@@ -131,14 +135,10 @@ public class ClientConnection extends Thread {
 			DataTypeIO.writeVarInt(output, packetByte.length);
 			output.write(packetByte);
 			output.flush();
-		} catch (IOException e) {
-			e.printStackTrace();
-		}
+		} catch (IOException e) {}
 		try {
 			client_socket.close();
-		} catch (IOException e) {
-			e.printStackTrace();
-		}
+		} catch (IOException e) {}
 	}
 	
 	public void disconnectDuringLogin(BaseComponent[] reason) {
@@ -148,14 +148,10 @@ public class ClientConnection extends Thread {
 			DataTypeIO.writeVarInt(output, packetByte.length);
 			output.write(packetByte);
 			output.flush();
-		} catch (IOException e) {
-			e.printStackTrace();
-		}
+		} catch (IOException e) {}
 		try {
 			client_socket.close();
-		} catch (IOException e) {
-			e.printStackTrace();
-		}
+		} catch (IOException e) {}
 	}
 
 	@Override
@@ -210,7 +206,7 @@ public class ClientConnection extends Thread {
 				    	String ip = data[1];
 				    	
 				    	bungeeUUID = UUID.fromString(data[2].replaceFirst("([0-9a-fA-F]{8})([0-9a-fA-F]{4})([0-9a-fA-F]{4})([0-9a-fA-F]{4})([0-9a-fA-F]+)", "$1-$2-$3-$4-$5"));
-				    	iNetAddress = InetAddress.getByName(ip);
+				    	inetAddress = InetAddress.getByName(ip);
 				    	
 				    	String skinJson = data[3];
 				    	
@@ -240,7 +236,7 @@ public class ClientConnection extends Thread {
 						
 						state = ClientState.PLAY;
 
-						player = new Player(this, username, uuid, Limbo.getInstance().entityCount.getAndIncrement(), Limbo.getInstance().getServerProperties().getWorldSpawn());
+						player = new Player(this, username, uuid, Limbo.getInstance().getNextEntityId(), Limbo.getInstance().getServerProperties().getWorldSpawn());
 						Limbo.getInstance().addPlayer(player);
 						
 						break;
@@ -248,6 +244,12 @@ public class ClientConnection extends Thread {
 						input.skipBytes(size - DataTypeIO.getVarIntLength(packetId));
 					}
 	    		}
+				
+				PlayerLoginEvent event = (PlayerLoginEvent) Limbo.getInstance().getEventsManager().callEvent(new PlayerLoginEvent(this, false));
+				if (event.isCancelled()) {
+					disconnectDuringLogin(event.getCancelReason());
+				}
+				
 				break;
 		    }
 		    
@@ -276,13 +278,6 @@ public class ClientConnection extends Thread {
 					}
 				}
 				
-				PacketPlayOutSpawnPosition spawnPos = new PacketPlayOutSpawnPosition(BlockPosition.from(s));
-				sendPacket(spawnPos);
-				
-				PacketPlayOutPositionAndLook positionLook = new PacketPlayOutPositionAndLook(s.getX(), s.getY(), s.getZ(), s.getYaw(), s.getPitch(), 1);
-				player.setLocation(new Location(world, s.getX(), s.getY(), s.getZ(), s.getYaw(), s.getPitch()));
-				sendPacket(positionLook);
-				
 				SkinResponse skinresponce = isBungeecord ? bungeeSkin : MojangAPIUtils.getSkinFromMojangServer(player.getName());
 				PlayerSkinProperty skin = skinresponce != null ? new PlayerSkinProperty(skinresponce.getSkin(), skinresponce.getSignature()) : null;
 				PacketPlayOutPlayerInfo info = new PacketPlayOutPlayerInfo(PlayerInfoAction.ADD_PLAYER, player.getUUID(), new PlayerInfoData.PlayerInfoDataAddPlayer(player.getName(), Optional.ofNullable(skin), p.getDefaultGamemode(), 0, false, Optional.empty()));
@@ -309,15 +304,26 @@ public class ClientConnection extends Thread {
 				String str = client_socket.getInetAddress().getHostName() + ":" + client_socket.getPort() + "|" + player.getName();
 				Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Player had connected to the Limbo server!");
 				
-				PacketPlayOutDeclareCommands declare = DeclareCommands.getDeclareCommandPacket();
-				sendPacket(declare);
+				PacketPlayOutDeclareCommands declare = DeclareCommands.getDeclareCommandsPacket(player);
+				if (declare != null) {
+					sendPacket(declare);
+				}
+				
+				Limbo.getInstance().getEventsManager().callEvent(new PlayerJoinEvent(player));
+				
+				PacketPlayOutSpawnPosition spawnPos = new PacketPlayOutSpawnPosition(BlockPosition.from(s));
+				sendPacket(spawnPos);
+				
+				PacketPlayOutPositionAndLook positionLook = new PacketPlayOutPositionAndLook(s.getX(), s.getY(), s.getZ(), s.getYaw(), s.getPitch(), 1);
+				player.setLocation(new Location(world, s.getX(), s.getY(), s.getZ(), s.getYaw(), s.getPitch()));
+				sendPacket(positionLook);
 				
 				while (client_socket.isConnected()) {
 					try {					
 						int size = DataTypeIO.readVarInt(input);
 						int packetId = DataTypeIO.readVarInt(input);
 						Class<? extends Packet> packetType = Packet.getPlayIn().get(packetId);
-						//System.out.println(packetType);
+						//System.out.println(packetId + " -> " + packetType);
 						if (packetType == null) {
 							input.skipBytes(size - DataTypeIO.getVarIntLength(packetId));
 						} else if (packetType.equals(PacketPlayInPositionAndLook.class)) {					
@@ -346,24 +352,13 @@ public class ClientConnection extends Thread {
 							}
 						} else if (packetType.equals(PacketPlayInTabComplete.class)) {
 							PacketPlayInTabComplete request = new PacketPlayInTabComplete(input);
-							String[] command = CustomStringUtils.splitStringToArgs(request.getText());
-							System.out.println(request.getText());
+							String[] command = CustomStringUtils.splitStringToArgs(request.getText().substring(1));
+
 							List<TabCompleteMatches> matches = new ArrayList<TabCompleteMatches>();
 							
-							TabCompleteMatches spawn = new TabCompleteMatches("spawn", new TextComponent(ChatColor.GOLD + "Teleports you back to the Limbo spawn!"));
+							matches.addAll(Limbo.getInstance().getPluginManager().getTabOptions(player, command).stream().map(each -> new TabCompleteMatches(each)).collect(Collectors.toList()));
 							
-							switch (command.length) {
-							case 0:
-								matches.add(spawn);
-								break;
-							case 1:
-								if ("spawn".startsWith(command[0])) {
-									matches.add(spawn);
-								}
-								break;
-							}
-							
-							int start = CustomStringUtils.getIndexOfArg(request.getText(), command.length - 1);
+							int start = CustomStringUtils.getIndexOfArg(request.getText(), command.length - 1) + 1;
 							int length = command[command.length - 1].length();
 							
 							PacketPlayOutTabComplete response = new PacketPlayOutTabComplete(request.getId(), start, length, matches.toArray(new TabCompleteMatches[matches.size()]));
@@ -371,19 +366,9 @@ public class ClientConnection extends Thread {
 						} else if (packetType.equals(PacketPlayInChat.class)) {
 							PacketPlayInChat chat = new PacketPlayInChat(input);
 							if (chat.getMessage().startsWith("/")) {
-								//TO-DO COMMANDS
-								String[] command = CustomStringUtils.splitStringToArgs(chat.getMessage().substring(1));
-								if (command[0].equalsIgnoreCase("spawn")) {
-									player.teleport(p.getWorldSpawn());
-									Limbo.getInstance().getConsole().sendMessage(player.getName() + " executed server command: /spawn");
-									player.sendMessage(new TextComponent(ChatColor.GOLD + "Teleporting you to spawn!"));
-								}
+								Limbo.getInstance().dispatchCommand(player, chat.getMessage());
 							} else {
-								String message = "<" + player.getName() + "> " + chat.getMessage();
-								Limbo.getInstance().getConsole().sendMessage(message);
-								for (Player each : Limbo.getInstance().getPlayers()) {
-									each.sendMessage(message);
-								}
+								player.chat(chat.getMessage());
 							}
 						} else {
 							input.skipBytes(size - DataTypeIO.getVarIntLength(packetId));
@@ -393,8 +378,12 @@ public class ClientConnection extends Thread {
 						break;
 					}
 	    		}
-				str = client_socket.getInetAddress().getHostName() + ":" + client_socket.getPort() + "|" + player.getName();
-				Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Player had disconnected!");
+				
+				Limbo.getInstance().getEventsManager().callEvent(new PlayerQuitEvent(player));
+		    	
+		    	str = client_socket.getInetAddress().getHostName() + ":" + client_socket.getPort() + "|" + player.getName();
+		    	Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Player had disconnected!");				
+				
 	    	}
 		    
     	} catch (Exception e) {}
@@ -403,6 +392,7 @@ public class ClientConnection extends Thread {
 			client_socket.close();
 		} catch (IOException e) {}
     	state = ClientState.DISCONNECTED;
+    	
     	if (player != null) {
     		Limbo.getInstance().removePlayer(player);
     	}

src/com/loohp/limbo/Server/Packets/PacketPlayOutTabComplete.java

@@ -22,6 +22,7 @@ public class PacketPlayOutTabComplete extends PacketOut {
 		this.id = id;
 		this.start = start;
 		this.length = length;
+		this.matches = matches;
 	}
 
 	public int getId() {

src/permission.yml

@@ -0,0 +1,11 @@
+groups:
+  admin:
+    - limboserver.stop
+    - limboserver.kick
+    - limboserver.say
+  default:
+    - limboserver.spawn
+
+players:
+  LOOHP: 
+    - admin