diff --git a/src/pocketmine/network/mcpe/NetworkSession.php b/src/pocketmine/network/mcpe/NetworkSession.php
index 818eb8a7c..391944094 100644
--- a/src/pocketmine/network/mcpe/NetworkSession.php
+++ b/src/pocketmine/network/mcpe/NetworkSession.php
@@ -668,30 +668,28 @@ class NetworkSession{
 				continue;
 			}
 
-			$data = new CommandData();
-			//TODO: commands containing uppercase letters in the name crash 1.9.0 client
-			$data->commandName = strtolower($command->getName());
-			$data->commandDescription = $this->server->getLanguage()->translateString($command->getDescription());
-			$data->flags = 0;
-			$data->permission = 0;
-
-			$parameter = new CommandParameter();
-			$parameter->paramName = "args";
-			$parameter->paramType = AvailableCommandsPacket::ARG_FLAG_VALID | AvailableCommandsPacket::ARG_TYPE_RAWTEXT;
-			$parameter->isOptional = true;
-			$data->overloads[0][0] = $parameter;
-
+			$lname = strtolower($command->getName());
 			$aliases = $command->getAliases();
+			$aliasObj = null;
 			if(!empty($aliases)){
-				if(!in_array($data->commandName, $aliases, true)){
+				if(!in_array($lname, $aliases, true)){
 					//work around a client bug which makes the original name not show when aliases are used
-					$aliases[] = $data->commandName;
+					$aliases[] = $lname;
 				}
-				$data->aliases = new CommandEnum();
-				$data->aliases->enumName = ucfirst($command->getName()) . "Aliases";
-				$data->aliases->enumValues = $aliases;
+				$aliasObj = new CommandEnum(ucfirst($command->getName()) . "Aliases", $aliases);
 			}
 
+			$data = new CommandData(
+				$lname, //TODO: commands containing uppercase letters in the name crash 1.9.0 client
+				$this->server->getLanguage()->translateString($command->getDescription()),
+				0,
+				0,
+				$aliasObj,
+				[
+					[CommandParameter::standard("args", AvailableCommandsPacket::ARG_TYPE_RAWTEXT, true)]
+				]
+			);
+
 			$pk->commandData[$command->getName()] = $data;
 		}
 
diff --git a/src/pocketmine/network/mcpe/protocol/AvailableCommandsPacket.php b/src/pocketmine/network/mcpe/protocol/AvailableCommandsPacket.php
index 587541f11..13f087fee 100644
--- a/src/pocketmine/network/mcpe/protocol/AvailableCommandsPacket.php
+++ b/src/pocketmine/network/mcpe/protocol/AvailableCommandsPacket.php
@@ -129,8 +129,8 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 	 * @throws BinaryDataException
 	 */
 	protected function getEnum(array $enumValueList) : CommandEnum{
-		$retval = new CommandEnum();
-		$retval->enumName = $this->getString();
+		$enumName = $this->getString();
+		$enumValues = [];
 
 		$listSize = count($enumValueList);
 
@@ -140,10 +140,10 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 				throw new BadPacketException("Invalid enum value index $index");
 			}
 			//Get the enum value from the initial pile of mess
-			$retval->enumValues[] = $enumValueList[$index];
+			$enumValues[] = $enumValueList[$index];
 		}
 
-		return $retval;
+		return new CommandEnum($enumName, $enumValues);
 	}
 
 	/**
@@ -151,15 +151,15 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 	 * @throws BinaryDataException
 	 */
 	protected function getSoftEnum() : CommandEnum{
-		$retval = new CommandEnum();
-		$retval->enumName = $this->getString();
+		$enumName = $this->getString();
+		$enumValues = [];
 
 		for($i = 0, $count = $this->getUnsignedVarInt(); $i < $count; ++$i){
 			//Get the enum value from the initial pile of mess
-			$retval->enumValues[] = $this->getString();
+			$enumValues[] = $this->getString();
 		}
 
-		return $retval;
+		return new CommandEnum($enumName, $enumValues);
 	}
 
 	/**
@@ -167,11 +167,12 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 	 * @param string[]    $enumValueMap
 	 */
 	protected function putEnum(CommandEnum $enum, array $enumValueMap) : void{
-		$this->putString($enum->enumName);
+		$this->putString($enum->getName());
 
-		$this->putUnsignedVarInt(count($enum->enumValues));
+		$values = $enum->getValues();
+		$this->putUnsignedVarInt(count($values));
 		$listSize = count($enumValueMap);
-		foreach($enum->enumValues as $value){
+		foreach($values as $value){
 			$index = $enumValueMap[$value] ?? -1;
 			if($index === -1){
 				throw new \InvalidStateException("Enum value '$value' not found");
@@ -181,10 +182,11 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 	}
 
 	protected function putSoftEnum(CommandEnum $enum) : void{
-		$this->putString($enum->enumName);
+		$this->putString($enum->getName());
 
-		$this->putUnsignedVarInt(count($enum->enumValues));
-		foreach($enum->enumValues as $value){
+		$values = $enum->getValues();
+		$this->putUnsignedVarInt(count($values));
+		foreach($values as $value){
 			$this->putString($value);
 		}
 	}
@@ -224,12 +226,12 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 	 * @throws BinaryDataException
 	 */
 	protected function getCommandData(array $enums, array $postfixes) : CommandData{
-		$retval = new CommandData();
-		$retval->commandName = $this->getString();
-		$retval->commandDescription = $this->getString();
-		$retval->flags = $this->getByte();
-		$retval->permission = $this->getByte();
-		$retval->aliases = $enums[$this->getLInt()] ?? null;
+		$name = $this->getString();
+		$description = $this->getString();
+		$flags = $this->getByte();
+		$permission = $this->getByte();
+		$aliases = $enums[$this->getLInt()] ?? null;
+		$overloads = [];
 
 		for($overloadIndex = 0, $overloadCount = $this->getUnsignedVarInt(); $overloadIndex < $overloadCount; ++$overloadIndex){
 			for($paramIndex = 0, $paramCount = $this->getUnsignedVarInt(); $paramIndex < $paramCount; ++$paramIndex){
@@ -243,23 +245,23 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 					$index = ($parameter->paramType & 0xffff);
 					$parameter->enum = $enums[$index] ?? null;
 					if($parameter->enum === null){
-						throw new BadPacketException("deserializing $retval->commandName parameter $parameter->paramName: expected enum at $index, but got none");
+						throw new BadPacketException("deserializing $name parameter $parameter->paramName: expected enum at $index, but got none");
 					}
 				}elseif($parameter->paramType & self::ARG_FLAG_POSTFIX){
 					$index = ($parameter->paramType & 0xffff);
 					$parameter->postfix = $postfixes[$index] ?? null;
 					if($parameter->postfix === null){
-						throw new BadPacketException("deserializing $retval->commandName parameter $parameter->paramName: expected postfix at $index, but got none");
+						throw new BadPacketException("deserializing $name parameter $parameter->paramName: expected postfix at $index, but got none");
 					}
 				}elseif(($parameter->paramType & self::ARG_FLAG_VALID) === 0){
-					throw new BadPacketException("deserializing $retval->commandName parameter $parameter->paramName: Invalid parameter type 0x" . dechex($parameter->paramType));
+					throw new BadPacketException("deserializing $name parameter $parameter->paramName: Invalid parameter type 0x" . dechex($parameter->paramType));
 				}
 
-				$retval->overloads[$overloadIndex][$paramIndex] = $parameter;
+				$overloads[$overloadIndex][$paramIndex] = $parameter;
 			}
 		}
 
-		return $retval;
+		return new CommandData($name, $description, $flags, $permission, $aliases, $overloads);
 	}
 
 	/**
@@ -268,13 +270,13 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 	 * @param int[]       $postfixIndexes
 	 */
 	protected function putCommandData(CommandData $data, array $enumIndexes, array $postfixIndexes) : void{
-		$this->putString($data->commandName);
-		$this->putString($data->commandDescription);
+		$this->putString($data->name);
+		$this->putString($data->description);
 		$this->putByte($data->flags);
 		$this->putByte($data->permission);
 
 		if($data->aliases !== null){
-			$this->putLInt($enumIndexes[$data->aliases->enumName] ?? -1);
+			$this->putLInt($enumIndexes[$data->aliases->getName()] ?? -1);
 		}else{
 			$this->putLInt(-1);
 		}
@@ -287,7 +289,7 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 				$this->putString($parameter->paramName);
 
 				if($parameter->enum !== null){
-					$type = self::ARG_FLAG_ENUM | self::ARG_FLAG_VALID | ($enumIndexes[$parameter->enum->enumName] ?? -1);
+					$type = self::ARG_FLAG_ENUM | self::ARG_FLAG_VALID | ($enumIndexes[$parameter->enum->getName()] ?? -1);
 				}elseif($parameter->postfix !== null){
 					$key = $postfixIndexes[$parameter->postfix] ?? -1;
 					if($key === -1){
@@ -353,15 +355,18 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 		$enumIndexes = [];
 		/** @var CommandEnum[] $enums */
 		$enums = [];
+
+		$addEnumFn = static function(CommandEnum $enum) use(&$enums, &$enumIndexes, &$enumValueIndexes){
+			if(!isset($enumIndexes[$enum->getName()])){
+				$enums[$enumIndexes[$enum->getName()] = count($enumIndexes)] = $enum;
+			}
+			foreach($enum->getValues() as $str){
+				$enumValueIndexes[$str] = $enumValueIndexes[$str] ?? count($enumValueIndexes); //latest index
+			}
+		};
 		foreach($this->commandData as $commandData){
 			if($commandData->aliases !== null){
-				if(!isset($enumIndexes[$commandData->aliases->enumName])){
-					$enums[$enumIndexes[$commandData->aliases->enumName] = count($enumIndexes)] = $commandData->aliases;
-				}
-
-				foreach($commandData->aliases->enumValues as $str){
-					$enumValueIndexes[$str] = $enumValueIndexes[$str] ?? count($enumValueIndexes); //latest index
-				}
+				$addEnumFn($commandData->aliases);
 			}
 
 			foreach($commandData->overloads as $overload){
@@ -371,12 +376,7 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 				 */
 				foreach($overload as $parameter){
 					if($parameter->enum !== null){
-						if(!isset($enumIndexes[$parameter->enum->enumName])){
-							$enums[$enumIndexes[$parameter->enum->enumName] = count($enumIndexes)] = $parameter->enum;
-						}
-						foreach($parameter->enum->enumValues as $str){
-							$enumValueIndexes[$str] = $enumValueIndexes[$str] ?? count($enumValueIndexes);
-						}
+						$addEnumFn($parameter->enum);
 					}
 
 					if($parameter->postfix !== null){
diff --git a/src/pocketmine/network/mcpe/protocol/types/CommandData.php b/src/pocketmine/network/mcpe/protocol/types/CommandData.php
index cf98b90fc..95bab2253 100644
--- a/src/pocketmine/network/mcpe/protocol/types/CommandData.php
+++ b/src/pocketmine/network/mcpe/protocol/types/CommandData.php
@@ -25,9 +25,9 @@ namespace pocketmine\network\mcpe\protocol\types;
 
 class CommandData{
 	/** @var string */
-	public $commandName;
+	public $name;
 	/** @var string */
-	public $commandDescription;
+	public $description;
 	/** @var int */
 	public $flags;
 	/** @var int */
@@ -37,4 +37,67 @@ class CommandData{
 	/** @var CommandParameter[][] */
 	public $overloads = [];
 
+	/**
+	 * @param string               $name
+	 * @param string               $description
+	 * @param int                  $flags
+	 * @param int                  $permission
+	 * @param CommandEnum|null     $aliases
+	 * @param CommandParameter[][] $overloads
+	 */
+	public function __construct(string $name, string $description, int $flags, int $permission, ?CommandEnum $aliases, array $overloads){
+		(function(array ...$overloads){
+			foreach($overloads as $overload){
+				(function(CommandParameter ...$parameters){})(...$overload);
+			}
+		})(...$overloads);
+		$this->name = $name;
+		$this->description = $description;
+		$this->flags = $flags;
+		$this->permission = $permission;
+		$this->aliases = $aliases;
+		$this->overloads = $overloads;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getName() : string{
+		return $this->name;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getDescription() : string{
+		return $this->description;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getFlags() : int{
+		return $this->flags;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getPermission() : int{
+		return $this->permission;
+	}
+
+	/**
+	 * @return CommandEnum|null
+	 */
+	public function getAliases() : ?CommandEnum{
+		return $this->aliases;
+	}
+
+	/**
+	 * @return CommandParameter[][]
+	 */
+	public function getOverloads() : array{
+		return $this->overloads;
+	}
 }
diff --git a/src/pocketmine/network/mcpe/protocol/types/CommandEnum.php b/src/pocketmine/network/mcpe/protocol/types/CommandEnum.php
index e6621c7a4..02597e90e 100644
--- a/src/pocketmine/network/mcpe/protocol/types/CommandEnum.php
+++ b/src/pocketmine/network/mcpe/protocol/types/CommandEnum.php
@@ -25,8 +25,30 @@ namespace pocketmine\network\mcpe\protocol\types;
 
 class CommandEnum{
 	/** @var string */
-	public $enumName;
+	private $enumName;
 	/** @var string[] */
-	public $enumValues = [];
+	private $enumValues = [];
 
+	/**
+	 * @param string   $enumName
+	 * @param string[] $enumValues
+	 */
+	public function __construct(string $enumName, array $enumValues){
+		$this->enumName = $enumName;
+		$this->enumValues = $enumValues;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getName() : string{
+		return $this->enumName;
+	}
+
+	/**
+	 * @return string[]
+	 */
+	public function getValues() : array{
+		return $this->enumValues;
+	}
 }
diff --git a/src/pocketmine/network/mcpe/protocol/types/CommandParameter.php b/src/pocketmine/network/mcpe/protocol/types/CommandParameter.php
index 2c26ac9bf..d19c7b9a8 100644
--- a/src/pocketmine/network/mcpe/protocol/types/CommandParameter.php
+++ b/src/pocketmine/network/mcpe/protocol/types/CommandParameter.php
@@ -23,6 +23,8 @@ declare(strict_types=1);
 
 namespace pocketmine\network\mcpe\protocol\types;
 
+use pocketmine\network\mcpe\protocol\AvailableCommandsPacket;
+
 class CommandParameter{
 	/** @var string */
 	public $paramName;
@@ -36,4 +38,29 @@ class CommandParameter{
 	public $enum;
 	/** @var string|null */
 	public $postfix;
+
+	private static function baseline(string $name, int $type, bool $optional) : self{
+		$result = new self;
+		$result->paramName = $name;
+		$result->paramType = $type;
+		$result->isOptional = $optional;
+		return $result;
+	}
+
+	public static function standard(string $name, int $type, bool $optional = false) : self{
+		return self::baseline($name, AvailableCommandsPacket::ARG_FLAG_VALID | $type, $optional);
+	}
+
+	public static function postfixed(string $name, string $postfix, bool $optional = false) : self{
+		$result = self::baseline($name, AvailableCommandsPacket::ARG_FLAG_POSTFIX, $optional);
+		$result->postfix = $postfix;
+		return $result;
+	}
+
+	public static function enum(string $name, CommandEnum $enum, int $flags, bool $optional = false) : self{
+		$result = self::baseline($name, AvailableCommandsPacket::ARG_FLAG_ENUM | AvailableCommandsPacket::ARG_FLAG_VALID, $optional);
+		$result->enum = $enum;
+		$result->byte1 = $flags;
+		return $result;
+	}
 }