Implemented vanilla /xp command.

src/command/SimpleCommandMap.php

@@ -64,6 +64,7 @@
 use pocketmine\command\defaults\VanillaCommand;
 use pocketmine\command\defaults\VersionCommand;
 use pocketmine\command\defaults\WhitelistCommand;
+use pocketmine\command\defaults\XpCommand;
 use pocketmine\command\utils\CommandStringHelper;
 use pocketmine\command\utils\InvalidCommandSyntaxException;
 use pocketmine\lang\KnownTranslationFactory;
@@ -128,7 +129,8 @@ private function setDefaultCommands() : void{
 			new TitleCommand(),
 			new TransferServerCommand(),
 			new VersionCommand(),
-			new WhitelistCommand()
+			new WhitelistCommand(),
+			new XpCommand(),
 		]);
 	}
 

src/command/defaults/XpCommand.php

@@ -0,0 +1,89 @@
+<?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\CommandSender;
+use pocketmine\command\utils\InvalidCommandSyntaxException;
+use pocketmine\entity\Attribute;
+use pocketmine\lang\KnownTranslationFactory;
+use pocketmine\permission\DefaultPermissionNames;
+use pocketmine\utils\AssumptionFailedError;
+use pocketmine\utils\Limits;
+use pocketmine\utils\TextFormat;
+use function abs;
+use function count;
+use function str_ends_with;
+use function substr;
+
+class XpCommand extends VanillaCommand{
+
+	public function __construct(){
+		parent::__construct(
+			"xp",
+			KnownTranslationFactory::pocketmine_command_xp_description(),
+			KnownTranslationFactory::pocketmine_command_xp_usage()
+		);
+		$this->setPermissions([
+			DefaultPermissionNames::COMMAND_XP_SELF,
+			DefaultPermissionNames::COMMAND_XP_OTHER
+		]);
+	}
+
+	public function execute(CommandSender $sender, string $commandLabel, array $args){
+		if(count($args) < 1){
+			throw new InvalidCommandSyntaxException();
+		}
+
+		$player = $this->fetchPermittedPlayerTarget($sender, $args[1] ?? null, DefaultPermissionNames::COMMAND_XP_SELF, DefaultPermissionNames::COMMAND_XP_OTHER);
+		if($player === null){
+			return true;
+		}
+
+		$xpManager = $player->getXpManager();
+		if(str_ends_with($args[0], "L")){
+			$xpLevelAttr = $player->getAttributeMap()->get(Attribute::EXPERIENCE_LEVEL) ?? throw new AssumptionFailedError();
+			$maxXpLevel = (int) $xpLevelAttr->getMaxValue();
+			$currentXpLevel = $xpManager->getXpLevel();
+			$xpLevels = $this->getInteger($sender, substr($args[0], 0, -1), -$currentXpLevel, $maxXpLevel - $currentXpLevel);
+			if($xpLevels >= 0){
+				$xpManager->addXpLevels($xpLevels, false);
+				$sender->sendMessage(KnownTranslationFactory::commands_xp_success_levels((string) $xpLevels, $player->getName()));
+			}else{
+				$xpLevels = abs($xpLevels);
+				$xpManager->subtractXpLevels($xpLevels);
+				$sender->sendMessage(KnownTranslationFactory::commands_xp_success_negative_levels((string) $xpLevels, $player->getName()));
+			}
+		}else{
+			$xp = $this->getInteger($sender, $args[0], max: Limits::INT32_MAX);
+			if($xp < 0){
+				$sender->sendMessage(KnownTranslationFactory::commands_xp_failure_widthdrawXp()->prefix(TextFormat::RED));
+			}else{
+				$xpManager->addXp($xp, false);
+				$sender->sendMessage(KnownTranslationFactory::commands_xp_success((string) $xp, $player->getName()));
+			}
+		}
+
+		return true;
+	}
+}

src/permission/DefaultPermissionNames.php

@@ -84,6 +84,8 @@ final class DefaultPermissionNames{
 	public const COMMAND_WHITELIST_LIST = "pocketmine.command.whitelist.list";
 	public const COMMAND_WHITELIST_RELOAD = "pocketmine.command.whitelist.reload";
 	public const COMMAND_WHITELIST_REMOVE = "pocketmine.command.whitelist.remove";
+	public const COMMAND_XP_OTHER = "pocketmine.command.xp.other";
+	public const COMMAND_XP_SELF = "pocketmine.command.xp.self";
 	public const GROUP_CONSOLE = "pocketmine.group.console";
 	public const GROUP_OPERATOR = "pocketmine.group.operator";
 	public const GROUP_USER = "pocketmine.group.user";

src/permission/DefaultPermissions.php

@@ -112,5 +112,7 @@ public static function registerCorePermissions() : void{
 		self::registerPermission(new Permission(Names::COMMAND_WHITELIST_LIST, l10n::pocketmine_permission_command_whitelist_list()), [$operatorRoot]);
 		self::registerPermission(new Permission(Names::COMMAND_WHITELIST_RELOAD, l10n::pocketmine_permission_command_whitelist_reload()), [$operatorRoot]);
 		self::registerPermission(new Permission(Names::COMMAND_WHITELIST_REMOVE, l10n::pocketmine_permission_command_whitelist_remove()), [$operatorRoot]);
+		self::registerPermission(new Permission(Names::COMMAND_XP_OTHER, l10n::pocketmine_permission_command_xp_other()), [$operatorRoot]);
+		self::registerPermission(new Permission(Names::COMMAND_XP_SELF, l10n::pocketmine_permission_command_xp_self()), [$operatorRoot]);
 	}
 }