DifficultyCommand.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\command\defaults;
 
use pocketmine\command\Command;
use pocketmine\command\CommandSender;
use pocketmine\command\utils\InvalidCommandSyntaxException;
use pocketmine\lang\KnownTranslationFactory;
use pocketmine\permission\DefaultPermissionNames;
use pocketmine\ServerProperties;
use pocketmine\world\World;
use function count;
 
class DifficultyCommand extends VanillaCommand{
 
    public function __construct(){
        parent::__construct(
            "difficulty",
            KnownTranslationFactory::pocketmine_command_difficulty_description(),
            KnownTranslationFactory::commands_difficulty_usage()
        );
        $this->setPermission(DefaultPermissionNames::COMMAND_DIFFICULTY);
    }
 
    public function execute(CommandSender $sender, string $commandLabel, array $args){
        if(count($args) !== 1){
            throw new InvalidCommandSyntaxException();
        }
 
        $difficulty = World::getDifficultyFromString($args[0]);
 
        if($sender->getServer()->isHardcore()){
            $difficulty = World::DIFFICULTY_HARD;
        }
 
        if($difficulty !== -1){
            $sender->getServer()->getConfigGroup()->setConfigInt(ServerProperties::DIFFICULTY, $difficulty);
 
            //TODO: add per-world support
            foreach($sender->getServer()->getWorldManager()->getWorlds() as $world){
                $world->setDifficulty($difficulty);
            }
 
            Command::broadcastCommandMessage($sender, KnownTranslationFactory::commands_difficulty_success((string) $difficulty));
        }else{
            throw new InvalidCommandSyntaxException();
        }
 
        return true;
    }
}