Magix sanity.

src/main/java/emu/grasscutter/command/commands/SetWorldLevelCommand.java

@@ -0,0 +1,39 @@
+package emu.grasscutter.command.commands;
+
+import emu.grasscutter.command.Command;
+import emu.grasscutter.command.CommandHandler;
+import emu.grasscutter.game.GenshinPlayer;
+import emu.grasscutter.game.props.PlayerProperty;
+
+import java.util.List;
+
+@Command(label = "setworldlevel", usage = "setworldlevel <level>",
+        description = "Sets your world level (Relog to see proper effects)",
+        aliases = {"setworldlvl"}, permission = "player.setworldlevel")
+public final class SetWorldLevelCommand implements CommandHandler {
+
+    @Override
+    public void execute(GenshinPlayer sender, List<String> args) {
+        if (sender == null) {
+            CommandHandler.sendMessage(null, "Run this command in-game.");
+            return; // TODO: set player's world level from console or other players
+        }
+
+        if (args.size() < 1) {
+            CommandHandler.sendMessage(sender, "Usage: setworldlevel <level>");
+            return;
+        }
+
+        try {
+            int level = Integer.parseInt(args.get(0));
+
+            // Set in both world and player props
+            sender.getWorld().setWorldLevel(level);
+            sender.setProperty(PlayerProperty.PROP_PLAYER_WORLD_LEVEL, level);
+
+            sender.dropMessage("World level set to " + level + ".");
+        } catch (NumberFormatException ignored) {
+            CommandHandler.sendMessage(null, "Invalid world level.");
+        }
+    }
+}