Grasscutter/src/main/java/emu/grasscutter/command/commands/DropCommand.java

package emu.grasscutter.command.commands;

import emu.grasscutter.Grasscutter;
import emu.grasscutter.command.Command;
import emu.grasscutter.command.CommandHandler;
import emu.grasscutter.data.GameData;
import emu.grasscutter.data.def.ItemData;
import emu.grasscutter.game.entity.EntityItem;
import emu.grasscutter.game.player.Player;
import emu.grasscutter.utils.Position;

import java.util.List;

import static emu.grasscutter.utils.Language.translate;

@Command(label = "drop", usage = "drop <itemId|itemName> [amount]",
        description = "Drops an item near you", aliases = {"d", "dropitem"}, permission = "server.drop")
public final class DropCommand implements CommandHandler {

    @Override
    public void execute(Player sender, Player targetPlayer, List<String> args) {
        if (targetPlayer == null) {
            CommandHandler.sendMessage(null, translate("commands.execution.need_target"));
            return;
        }
        
        int item = 0;
        int amount = 1;

        switch (args.size()) {
            case 2:
                try {
                    amount = Integer.parseInt(args.get(1));
                } catch (NumberFormatException ignored) {
                    CommandHandler.sendMessage(sender, translate("commands.generic.invalid.amount"));
                    return;
                }  // Slightly cheeky here: no break, so it falls through to initialize the first argument too
            case 1:
                try {
                    item = Integer.parseInt(args.get(0));
                } catch (NumberFormatException ignored) {
                    CommandHandler.sendMessage(sender, translate("commands.generic.invalid.itemId"));
                    return;
                }
                break;
            default:
                CommandHandler.sendMessage(sender, translate("commands.drop.command_usage"));
                return;
        }

        ItemData itemData = GameData.getItemDataMap().get(item);
        if (itemData == null) {
            CommandHandler.sendMessage(sender, translate("commands.generic.invalid.itemId"));
            return;
        }
        if (itemData.isEquip()) {
            float range = (5f + (.1f * amount));
            for (int i = 0; i < amount; i++) {
                Position pos = targetPlayer.getPos().clone().addX((float) (Math.random() * range) - (range / 2)).addY(3f).addZ((float) (Math.random() * range) - (range / 2));
                EntityItem entity = new EntityItem(targetPlayer.getScene(), targetPlayer, itemData, pos, 1);
                targetPlayer.getScene().addEntity(entity);
            }
        } else {
            EntityItem entity = new EntityItem(targetPlayer.getScene(), targetPlayer, itemData, targetPlayer.getPos().clone().addY(3f), amount);
            targetPlayer.getScene().addEntity(entity);
        }
        CommandHandler.sendMessage(sender, translate("commands.drop.success", Integer.toString(amount), Integer.toString(item)));
    }
}