Implement new command system

src/deprecated/java/emu/grasscutter/commands/PlayerCommands.java

+package emu.grasscutter.commands;
+
+import java.lang.reflect.Modifier;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+
+import emu.grasscutter.data.GenshinData;
+import emu.grasscutter.data.def.ItemData;
+import emu.grasscutter.data.def.MonsterData;
+import emu.grasscutter.game.GenshinPlayer;
+import emu.grasscutter.game.avatar.GenshinAvatar;
+import emu.grasscutter.game.entity.EntityAvatar;
+import emu.grasscutter.game.entity.EntityItem;
+import emu.grasscutter.game.entity.EntityMonster;
+import emu.grasscutter.game.entity.GenshinEntity;
+import emu.grasscutter.game.inventory.GenshinItem;
+import emu.grasscutter.game.inventory.ItemType;
+import emu.grasscutter.game.props.ActionReason;
+import emu.grasscutter.game.props.FightProperty;
+import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
+import emu.grasscutter.server.packet.send.PacketItemAddHintNotify;
+import emu.grasscutter.utils.Position;
+
+public class PlayerCommands {
+	private static HashMap<String, PlayerCommand> list = new HashMap<>();
+	
+	static {
+		try {
+			// Look for classes
+			for (Class<?> cls : PlayerCommands.class.getDeclaredClasses()) {
+				// Get non abstract classes
+			    if (!Modifier.isAbstract(cls.getModifiers())) {
+			    	Command commandAnnotation = cls.getAnnotation(Command.class);
+			    	PlayerCommand command = (PlayerCommand) cls.newInstance();
+			    	
+			    	if (commandAnnotation != null) {
+			    		command.setLevel(commandAnnotation.gmLevel());
+			    		for (String alias : commandAnnotation.aliases()) {
+			    			if (alias.length() == 0) {
+			    				continue;
+			    			}
+			    			
+			    			String commandName = "!" + alias;
+					    	list.put(commandName, command);
+					    	commandName = "/" + alias;
+					    	list.put(commandName, command);
+			    		}
+			    	}
+			    	
+			    	String commandName = "!" + cls.getSimpleName().toLowerCase();
+			    	list.put(commandName, command);
+			    	commandName = "/" + cls.getSimpleName().toLowerCase();
+			    	list.put(commandName, command);
+			    }
+		
+			}
+		} catch (Exception e) {
+			
+		}
+	}
+
+	public static void handle(GenshinPlayer player, String msg) {
+		String[] split = msg.split(" ");
+		
+		// End if invalid
+		if (split.length == 0) {
+			return;
+		}
+		
+		//
+		String first = split[0].toLowerCase();
+		PlayerCommand c = PlayerCommands.list.get(first);
+		
+		if (c != null) {
+			// Level check
+			if (player.getGmLevel() < c.getLevel()) {
+				return;
+			}
+			// Execute
+			int len = Math.min(first.length() + 1, msg.length());
+			c.execute(player, msg.substring(len));
+		}
+	}
+	
+	public static abstract class PlayerCommand {
+		// GM level required to use this command
+		private int level;
+		protected int getLevel() { return this.level; }
+		protected void setLevel(int minLevel) { this.level = minLevel; }
+		
+		// Main
+		public abstract void execute(GenshinPlayer player, String raw);
+	}
+	
+	// ================ Commands ================
+	
+	@Command(aliases = {"g", "item", "additem"}, helpText = "/give [item id] [count] - Gives {count} amount of {item id}")
+	public static class Give extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			String[] split = raw.split(" ");
+			int itemId = 0, count = 1;
+			
+			try {
+				itemId = Integer.parseInt(split[0]);
+			} catch (Exception e) {
+				itemId = 0;
+			}
+			
+			try {
+				count = Math.max(Math.min(Integer.parseInt(split[1]), Integer.MAX_VALUE), 1);
+			} catch (Exception e) {
+				count = 1;
+			}
+			
+			// Give
+			ItemData itemData = GenshinData.getItemDataMap().get(itemId);
+			GenshinItem item;
+			
+			if (itemData == null) {
+				player.dropMessage("Error: Item data not found");
+				return;
+			}
+			
+			if (itemData.isEquip()) {
+				List<GenshinItem> items = new LinkedList<>();
+				for (int i = 0; i < count; i++) {
+					item = new GenshinItem(itemData);
+					items.add(item);
+				}
+				player.getInventory().addItems(items);
+				player.sendPacket(new PacketItemAddHintNotify(items, ActionReason.SubfieldDrop));
+			} else {
+				item = new GenshinItem(itemData, count);
+				player.getInventory().addItem(item);
+				player.sendPacket(new PacketItemAddHintNotify(item, ActionReason.SubfieldDrop));
+			}
+		}
+	}
+	
+	@Command(aliases = {"d"}, helpText = "/drop [item id] [count] - Drops {count} amount of {item id}")
+	public static class Drop extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			String[] split = raw.split(" ");
+			int itemId = 0, count = 1;
+			
+			try {
+				itemId = Integer.parseInt(split[0]);
+			} catch (Exception e) {
+				itemId = 0;
+			}
+			
+			try {
+				count = Math.max(Math.min(Integer.parseInt(split[1]), Integer.MAX_VALUE), 1);
+			} catch (Exception e) {
+				count = 1;
+			}
+			
+			// Give
+			ItemData itemData = GenshinData.getItemDataMap().get(itemId);
+			
+			if (itemData == null) {
+				player.dropMessage("Error: Item data not found");
+				return;
+			}
+			
+			if (itemData.isEquip()) {
+				float range = (5f + (.1f * count));
+				for (int i = 0; i < count; i++) {
+					Position pos = player.getPos().clone().addX((float) (Math.random() * range) - (range / 2)).addY(3f).addZ((float) (Math.random() * range) - (range / 2));
+					EntityItem entity = new EntityItem(player.getWorld(), player, itemData, pos, 1);
+					player.getWorld().addEntity(entity);
+				}
+			} else {
+				EntityItem entity = new EntityItem(player.getWorld(), player, itemData, player.getPos().clone().addY(3f), count);
+				player.getWorld().addEntity(entity);
+			}
+		}
+	}
+	
+	@Command(helpText = "/spawn [monster id] [count] - Creates {count} amount of {item id}")
+	public static class Spawn extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			String[] split = raw.split(" ");
+			int monsterId = 0, count = 1, level = 1;
+			
+			try {
+				monsterId = Integer.parseInt(split[0]);
+			} catch (Exception e) {
+				monsterId = 0;
+			}
+			
+			try {
+				level = Math.max(Math.min(Integer.parseInt(split[1]), 200), 1);
+			} catch (Exception e) {
+				level = 1;
+			}
+			
+			try {
+				count = Math.max(Math.min(Integer.parseInt(split[2]), 1000), 1);
+			} catch (Exception e) {
+				count = 1;
+			}
+			
+			// Give
+			MonsterData monsterData = GenshinData.getMonsterDataMap().get(monsterId);
+			
+			if (monsterData == null) {
+				player.dropMessage("Error: Monster data not found");
+				return;
+			}
+			
+			float range = (5f + (.1f * count));
+			for (int i = 0; i < count; i++) {
+				Position pos = player.getPos().clone().addX((float) (Math.random() * range) - (range / 2)).addY(3f).addZ((float) (Math.random() * range) - (range / 2));
+				EntityMonster entity = new EntityMonster(player.getWorld(), monsterData, pos, level);
+				player.getWorld().addEntity(entity);
+			}
+		}
+	}
+	
+	@Command(helpText = "/killall")
+	public static class KillAll extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			List<GenshinEntity> toRemove = new LinkedList<>();
+			for (GenshinEntity entity : player.getWorld().getEntities().values()) {
+				if (entity instanceof EntityMonster) {
+					toRemove.add(entity);
+				}
+			}
+			toRemove.forEach(e -> player.getWorld().killEntity(e, 0));
+		}
+	}
+	
+	@Command(helpText = "/resetconst - Resets all constellations for the currently active character")
+	public static class ResetConst extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			EntityAvatar entity = player.getTeamManager().getCurrentAvatarEntity();
+			
+			if (entity == null) {
+				return;
+			}
+			
+			GenshinAvatar avatar = entity.getAvatar();
+			
+			avatar.getTalentIdList().clear();
+			avatar.setCoreProudSkillLevel(0);
+			avatar.recalcStats();
+			avatar.save();
+			
+			player.dropMessage("Constellations for " + entity.getAvatar().getAvatarData().getName() + " have been reset. Please relogin to see changes.");
+		}
+	}
+	
+	@Command(helpText = "/godmode - Prevents you from taking damage")
+	public static class Godmode extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			player.setGodmode(!player.hasGodmode());
+			player.dropMessage("Godmode is now " + (player.hasGodmode() ? "ON" : "OFF"));
+		}
+	}
+	
+	@Command(helpText = "/sethp [hp]")
+	public static class Sethp extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			String[] split = raw.split(" ");
+			int hp = 0;
+			
+			try {
+				hp = Math.max(Integer.parseInt(split[0]), 1);
+			} catch (Exception e) {
+				hp = 1;
+			}
+			
+			EntityAvatar entity = player.getTeamManager().getCurrentAvatarEntity();
+			
+			if (entity == null) {
+				return;
+			}
+			
+			entity.setFightProperty(FightProperty.FIGHT_PROP_CUR_HP, hp);
+			entity.getWorld().broadcastPacket(new PacketEntityFightPropUpdateNotify(entity, FightProperty.FIGHT_PROP_CUR_HP));
+		}
+	}
+	
+	@Command(aliases = {"clearart"}, helpText = "/clearartifacts")
+	public static class ClearArtifacts extends PlayerCommand {
+		@Override
+		public void execute(GenshinPlayer player, String raw) {
+			List<GenshinItem> toRemove = new LinkedList<>();
+			for (GenshinItem item : player.getInventory().getItems().values()) {
+				if (item.getItemType() == ItemType.ITEM_RELIQUARY && item.getLevel() == 1 && item.getExp() == 0 && !item.isLocked() && !item.isEquipped()) {
+					toRemove.add(item);
+				}
+			}
+			
+			player.getInventory().removeItems(toRemove);
+		}
+	}
+}

src/main/java/emu/grasscutter/Grasscutter.java

@@ -7,7 +7,9 @@ import java.io.FileWriter;
 import java.io.InputStreamReader;
 import java.net.InetSocketAddress;
 
+import emu.grasscutter.commands.CommandMap;
 import emu.grasscutter.utils.Utils;
+import org.reflections.Reflections;
 import org.slf4j.LoggerFactory;
 
 import com.google.gson.Gson;
@@ -23,10 +25,6 @@ import emu.grasscutter.tools.Tools;
 import emu.grasscutter.utils.Crypto;
 
 public final class Grasscutter {
-	static { 
-		System.setProperty("logback.configurationFile", "src/main/resources/logback.xml");
-	}
-	
 	private static final Logger log = (Logger) LoggerFactory.getLogger(Grasscutter.class);
 	private static Config config;
 	
@@ -37,8 +35,13 @@ public final class Grasscutter {
 	private static DispatchServer dispatchServer;
 	private static GameServer gameServer;
 	
+	public static final Reflections reflector = new Reflections();
+	
 	static {
-		// Load configuration.
+		// Declare logback configuration.
+		System.setProperty("logback.configurationFile", "src/main/resources/logback.xml");
+		
+		// Load server configuration.
 		Grasscutter.loadConfig();
 		// Check server structure.
 		Utils.startupCheck();
@@ -100,7 +103,7 @@ public final class Grasscutter {
 		String input;
 		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
 			while ((input = br.readLine()) != null) {
-				ServerCommands.handle(input);
+				CommandMap.getInstance().invoke(null, input);
 			}
 		} catch (Exception e) {
 			Grasscutter.getLogger().error("An error occurred.", e);

src/main/java/emu/grasscutter/commands/Command.java

@@ -5,9 +5,11 @@ import java.lang.annotation.RetentionPolicy;
 
 @Retention(RetentionPolicy.RUNTIME) 
 public @interface Command {
+	String label() default "";
+	
 	String[] aliases() default "";
 	
 	int gmLevel() default 1;
 	
-	String helpText() default "";
+	String usage() default "";
 }

src/main/java/emu/grasscutter/commands/CommandHandler.java

+package emu.grasscutter.commands;
+
+import emu.grasscutter.Grasscutter;
+import emu.grasscutter.game.GenshinPlayer;
+
+import java.util.List;
+
+public interface CommandHandler {
+    /* Invoked on player execution. */
+    void execute(GenshinPlayer player, List<String> args);
+    /* Invoked on server execution. */
+    void execute(List<String> args);
+    
+    /*
+     * Utilities.
+     */
+
+    /**
+     * Send a message to the target.
+     * @param player The player to send the message to, or null for the server console.
+     * @param message The message to send.
+     */
+    static void sendMessage(GenshinPlayer player, String message) {
+        if(player == null) {
+            Grasscutter.getLogger().info(message);
+        } else player.dropMessage(message);
+    }
+}

src/main/java/emu/grasscutter/commands/CommandMap.java

+package emu.grasscutter.commands;
+
+import emu.grasscutter.Grasscutter;
+import emu.grasscutter.game.GenshinPlayer;
+import org.reflections.Reflections;
+
+import java.util.*;
+
+@SuppressWarnings("UnusedReturnValue")
+public final class CommandMap {
+    public static CommandMap getInstance() {
+        return Grasscutter.getGameServer().getCommandMap();
+    }
+    
+    private final Map<String, CommandHandler> commands = new HashMap<>();
+
+    /**
+     * Register a command handler.
+     * @param label The command label.
+     * @param command The command handler.
+     * @return Instance chaining.
+     */
+    public CommandMap registerCommand(String label, CommandHandler command) {
+        this.commands.put(label, command); return this;
+    }
+
+    /**
+     * Removes a registered command handler.
+     * @param label The command label.
+     * @return Instance chaining.
+     */
+    public CommandMap unregisterCommand(String label) {
+        this.commands.remove(label); return this;
+    }
+
+    /**
+     * Invoke a command handler with the given arguments.
+     * @param player The player invoking the command or null for the server console.
+     * @param rawMessage The messaged used to invoke the command.
+     */
+    public void invoke(GenshinPlayer player, String rawMessage) {
+        // Remove prefix if present.
+        if(!Character.isLetter(rawMessage.charAt(0)))
+            rawMessage = rawMessage.substring(1);
+        
+        // Parse message.
+        String[] split = rawMessage.split(" ");
+        List<String> args = Arrays.asList(split);
+        String label = args.remove(0);
+        
+        // Get command handler.
+        CommandHandler handler = this.commands.get(label);
+        if(handler == null) {
+            CommandHandler.sendMessage(player, "Unknown command: " + label); return;
+        }
+        
+        // Invoke execute method for handler.
+        if(player == null)
+            handler.execute(args);
+        else handler.execute(player, args);
+    }
+    
+    public CommandMap() {
+        this(false);
+    }
+    
+    public CommandMap(boolean scan) {
+        if(scan) this.scan();
+    }
+
+    /**
+     * Scans for all classes annotated with {@link Command} and registers them.
+     */
+    private void scan() {
+        Reflections reflector = Grasscutter.reflector;
+        Set<?> classes = reflector.getTypesAnnotatedWith(Command.class);
+        classes.forEach(annotated -> {
+            try {
+                Class<?> cls = annotated.getClass();
+                Command cmdData = cls.getAnnotation(Command.class);
+                Object object = cls.getDeclaredConstructors()[0].newInstance();
+                if (object instanceof CommandHandler)
+                    this.registerCommand(cmdData.label(), (CommandHandler) object);
+            } catch (Exception ignored) { }
+        });
+    }
+}

src/main/java/emu/grasscutter/game/managers/ChatManager.java

 package emu.grasscutter.game.managers;
 
-import emu.grasscutter.Grasscutter;
+import emu.grasscutter.commands.CommandMap;
 import emu.grasscutter.commands.PlayerCommands;
 import emu.grasscutter.game.GenshinPlayer;
 import emu.grasscutter.net.packet.GenshinPacket;
@@ -26,8 +26,8 @@ public class ChatManager {
 		}
 				
 		// Check if command
-		if (message.charAt(0) == '!' || message.charAt(0) == '/') {
-			PlayerCommands.handle(player, message);
+		if (message.charAt(0) == '!') {
+			CommandMap.getInstance().invoke(player, message);
 			return;
 		}
 		
@@ -68,7 +68,7 @@ public class ChatManager {
 				
 		// Check if command
 		if (message.charAt(0) == '!') {
-			PlayerCommands.handle(player, message);
+			CommandMap.getInstance().invoke(player, message);
 			return;
 		}
 

src/main/java/emu/grasscutter/server/game/GameServer.java

@@ -11,6 +11,7 @@ import java.util.concurrent.ConcurrentHashMap;
 
 import emu.grasscutter.GenshinConstants;
 import emu.grasscutter.Grasscutter;
+import emu.grasscutter.commands.CommandMap;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.GenshinPlayer;
 import emu.grasscutter.game.dungeons.DungeonManager;
@@ -23,11 +24,10 @@ import emu.grasscutter.net.packet.PacketHandler;
 import emu.grasscutter.net.proto.SocialDetailOuterClass.SocialDetail;
 import emu.grasscutter.netty.MihoyoKcpServer;
 
-public class GameServer extends MihoyoKcpServer {
+public final class GameServer extends MihoyoKcpServer {
 	private final InetSocketAddress address;
 	private final GameServerPacketHandler packetHandler;
-	private final Timer gameLoop;
-	
+
 	private final Map<Integer, GenshinPlayer> players;
 	
 	private final ChatManager chatManager;
@@ -36,9 +36,11 @@ public class GameServer extends MihoyoKcpServer {
 	private final ShopManager shopManager;
 	private final MultiplayerManager multiplayerManager;
 	private final DungeonManager dungeonManager;
+	private final CommandMap commandMap;
 	
 	public GameServer(InetSocketAddress address) {
 		super(address);
+		
 		this.setServerInitializer(new GameServerInitializer(this));
 		this.address = address;
 		this.packetHandler = new GameServerPacketHandler(PacketHandler.class);
@@ -50,22 +52,22 @@ public class GameServer extends MihoyoKcpServer {
 		this.shopManager = new ShopManager(this);
 		this.multiplayerManager = new MultiplayerManager(this);
 		this.dungeonManager = new DungeonManager(this);
+		this.commandMap = new CommandMap(true);
 		
-		// Ticker
-		this.gameLoop = new Timer();
-		this.gameLoop.scheduleAtFixedRate(new TimerTask() {
+		// Schedule game loop.
+		Timer gameLoop = new Timer();
+		gameLoop.scheduleAtFixedRate(new TimerTask() {
 			@Override
 			public void run() {
 				try {
 					onTick();
 				} catch (Exception e) {
-					// TODO Auto-generated catch block
-					e.printStackTrace();
+					Grasscutter.getLogger().error("An error occurred during game update.", e);
 				}
 			}
 		}, new Date(), 1000L);
 		
-		// Shutdown hook
+		// Hook into shutdown event.
 		Runtime.getRuntime().addShutdownHook(new Thread(this::onServerShutdown));
 	}
 	
@@ -101,6 +103,10 @@ public class GameServer extends MihoyoKcpServer {
 		return dungeonManager;
 	}
 	
+	public CommandMap getCommandMap() {
+		return this.commandMap;
+	}
+	
 	public void registerPlayer(GenshinPlayer player) {
 		getPlayers().put(player.getId(), player);
 	}