Implement basic permission system

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

@@ -13,7 +13,7 @@ public @interface Command {
 	
 	Execution execution() default Execution.ALL;
 	
-	int gmLevel() default 1;
+	String permission() default "";
 	
 	enum Execution {
 		ALL,

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

 package emu.grasscutter.commands;
 
 import emu.grasscutter.Grasscutter;
+import emu.grasscutter.game.Account;
 import emu.grasscutter.game.GenshinPlayer;
 import org.reflections.Reflections;
 
@@ -13,7 +14,7 @@ public final class CommandMap {
     }
     
     private final Map<String, CommandHandler> commands = new HashMap<>();
-    private final Map<String, Command.Execution> executionPower = new HashMap<>();
+    private final Map<String, Command> annotations = new HashMap<>();
 
     /**
      * Register a command handler.
@@ -26,14 +27,14 @@ public final class CommandMap {
         
         // Get command data.
         Command annotation = command.getClass().getAnnotation(Command.class);
-        this.executionPower.put(label, annotation.execution());
+        this.annotations.put(label, annotation);
         this.commands.put(label, command);
         
         // Register aliases.
         if(annotation.aliases().length > 0) {
             for (String alias : annotation.aliases()) {
                 this.commands.put(alias, command);
-                this.executionPower.put(alias, annotation.execution());
+                this.annotations.put(alias, annotation);
             }
         } return this;
     }
@@ -49,14 +50,14 @@ public final class CommandMap {
         if(handler == null) return this;
         
         Command annotation = handler.getClass().getAnnotation(Command.class);
-        this.executionPower.remove(label);
+        this.annotations.remove(label);
         this.commands.remove(label);
         
         // Unregister aliases.
         if(annotation.aliases().length > 0) {
             for (String alias : annotation.aliases()) {
                 this.commands.remove(alias);
-                this.executionPower.remove(alias);
+                this.annotations.remove(alias);
             }
         }
         
@@ -106,8 +107,18 @@ public final class CommandMap {
             CommandHandler.sendMessage(player, "Unknown command: " + label); return;
         }
         
+        // Check for permission.
+        if(player != null) {
+            String permissionNode = this.annotations.get(label).permission();
+            Account account = player.getAccount();
+            List<String> permissions = account.getPermissions();
+            if(!permissions.contains("*") && !permissions.contains(permissionNode)) {
+                CommandHandler.sendMessage(player, "You do not have permission to run this command."); return;
+            }
+        }
+        
         // Execution power check.
-        Command.Execution executionPower = this.executionPower.get(label);
+        Command.Execution executionPower = this.annotations.get(label).execution();
         if(player == null && executionPower == Command.Execution.PLAYER) {
             CommandHandler.sendMessage(null, "Run this command in-game."); return;
         } else if (player != null && executionPower == Command.Execution.CONSOLE) {

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

@@ -109,7 +109,10 @@ public final class ServerCommands {
                     Account account = DatabaseHelper.createAccountWithId(username, uid);
                     if(account == null) {
                         CommandHandler.sendMessage(null, "Account already exists."); return;
-                    } else CommandHandler.sendMessage(null, "Account created with UID " + account.getPlayerId() + ".");
+                    } else {
+                        CommandHandler.sendMessage(null, "Account created with UID " + account.getPlayerId() + ".");
+                        account.addPermission("*"); // Grant the player superuser permissions.
+                    }
                     return;
                 case "delete":
                     if(DatabaseHelper.deleteAccount(username)) {
@@ -120,6 +123,44 @@ public final class ServerCommands {
         }
     }
     
+    @Command(label = "permission", 
+            usage = "Usage: permission <add|remove> <username> <permission>", 
+            execution = Command.Execution.CONSOLE)
+    public static class PermissionCommand implements CommandHandler {
+
+        @Override
+        public void execute(List<String> args) {
+            if(args.size() < 3) {
+                CommandHandler.sendMessage(null, "Usage: permission <add|remove> <username> <permission>"); return;
+            }
+            
+            String action = args.get(0);
+            String username = args.get(1);
+            String permission = args.get(2);
+            
+            Account account = DatabaseHelper.getAccountByName(username);
+            if(account == null) {
+                CommandHandler.sendMessage(null, "Account not found."); return;
+            }
+            
+            switch(action) {
+                default:
+                    CommandHandler.sendMessage(null, "Usage: permission <add|remove> <username> <permission>");
+                    return;
+                case "add":
+                    if(account.addPermission(permission)) {
+                        CommandHandler.sendMessage(null, "Permission added."); return;
+                    } else CommandHandler.sendMessage(null, "They already have this permission!");
+                    return;
+                case "remove":
+                    if(account.removePermission(permission)) {
+                        CommandHandler.sendMessage(null, "Permission removed."); return;
+                    } else CommandHandler.sendMessage(null, "They don't have this permission!");
+                    return;
+            }
+        }
+    }
+    
     @Command(label = "help", 
             usage = "Usage: help [command]")
     public static class HelpCommand implements CommandHandler {

src/main/java/emu/grasscutter/game/Account.java

@@ -9,6 +9,8 @@ import emu.grasscutter.utils.Crypto;
 import emu.grasscutter.utils.Utils;
 import dev.morphia.annotations.IndexOptions;
 
+import java.util.List;
+
 @Entity(value = "accounts", noClassnameStored = true)
 public class Account {
 	@Id private String id;
@@ -23,6 +25,7 @@ public class Account {
 	
 	private String token;
 	private String sessionKey; // Session token for dispatch server
+	private List<String> permissions;
 
 	@Deprecated
 	public Account() {}
@@ -85,6 +88,22 @@ public class Account {
 		return this.sessionKey;
 	}
 
+	/**
+	 * The collection of a player's permissions.
+	 */
+	public List<String> getPermissions() {
+		return this.permissions;
+	}
+	
+	public boolean addPermission(String permission) {
+		if(this.permissions.contains(permission)) return false;
+		this.permissions.add(permission); return true;
+	}
+	
+	public boolean removePermission(String permission) {
+		return this.permissions.remove(permission);
+	}
+	
 	// TODO make unique
 	public String generateLoginToken() {
 		this.token = Utils.bytesToHex(Crypto.createSessionKey(32));

src/main/java/emu/grasscutter/game/GenshinPlayer.java

 package emu.grasscutter.game;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
 
 import dev.morphia.annotations.*;
 import emu.grasscutter.GenshinConstants;