First step in restructuring command alias handling

This decouples Command from CommandMap, and moves the burden of tracking registered
aliases to CommandMap. This allows lots of simplification, and also solves a few
weird usage message issues.

- Active (registered) aliases are now tracked via CommandMapEntry
- Commands overriding other commands' aliases now update the original command's registered alias list properly
- Command alias lists now include prefixed aliases
- Prefixed aliases are now included in command data provided to the client
- Server-side /pocketmine:help is now visible on the client
- Permission testing can now provide context that's more relevant to the command invocation - e.g. if a user doesn't have /time set permission, it'll now show a more specific message where previously it would just show that the permission for /time was denied
- User-specified label is now used for permission messages instead of command name - this is more consistent with user expectations
- /help can now see prefixed aliases
- Removed magic alias registration behaviour for VanillaCommand that I don't think anyone expected
- Aliases are now provided to CommandMap via register() parameters, instead of being retrieved from the provided Command
- Command->get/setAliases(), get/setLabel() and getName() are removed
- Command->getName() pushed down to PluginCommand, as it's only useful for CommandExecutors as a command ID and shouldn't be used anywhere else

src/command/ClosureCommand.php

@@ -38,19 +38,17 @@ final class ClosureCommand extends Command{
 	 * @phpstan-param Execute $execute
 	 */
 	public function __construct(
-		string $name,
 		\Closure $execute,
 		array $permissions,
 		Translatable|string $description = "",
 		Translatable|string|null $usageMessage = null,
-		array $aliases = []
 	){
 		Utils::validateCallableSignature(
 			fn(CommandSender $sender, Command $command, string $commandLabel, array $args) : mixed => 1,
 			$execute,
 		);
 		$this->execute = $execute;
-		parent::__construct($name, $description, $usageMessage, $aliases);
+		parent::__construct($description, $usageMessage);
 		$this->setPermissions($permissions);
 	}
 

src/command/Command.php

@@ -33,52 +33,20 @@ use pocketmine\permission\PermissionManager;
 use pocketmine\Server;
 use pocketmine\utils\BroadcastLoggerForwarder;
 use pocketmine\utils\TextFormat;
-use function array_values;
 use function explode;
 use function implode;
 use function str_replace;
 use const PHP_INT_MAX;
 
 abstract class Command{
-
-	private string $name;
-
-	private string $nextLabel;
-	private string $label;
-
-	/**
-	 * @var string[]
-	 * @phpstan-var list<string>
-	 */
-	private array $aliases = [];
-
-	/**
-	 * @var string[]
-	 * @phpstan-var list<string>
-	 */
-	private array $activeAliases = [];
-
-	private ?CommandMap $commandMap = null;
-
-	protected Translatable|string $description = "";
-
-	protected Translatable|string $usageMessage;
-
 	/** @var string[] */
 	private array $permission = [];
 	private Translatable|string|null $permissionMessage = null;
 
-	/**
+	public function __construct(
-	 * @param string[] $aliases
+		private Translatable|string $description = "",
-	 * @phpstan-param list<string> $aliases
+		private Translatable|string|null $usageMessage = null
-	 */
+	){}
-	public function __construct(string $name, Translatable|string $description = "", Translatable|string|null $usageMessage = null, array $aliases = []){
-		$this->name = $name;
-		$this->setLabel($name);
-		$this->setDescription($description);
-		$this->usageMessage = $usageMessage ?? ("/" . $name);
-		$this->setAliases($aliases);
-	}
 
 	/**
 	 * @param string[] $args
@@ -89,10 +57,6 @@ abstract class Command{
 	 */
 	abstract public function execute(CommandSender $sender, string $commandLabel, array $args);
 
-	public function getName() : string{
-		return $this->name;
-	}
-
 	/**
 	 * @return string[]
 	 */
@@ -117,12 +81,17 @@ abstract class Command{
 		$this->setPermissions($permission === null ? [] : explode(";", $permission, limit: PHP_INT_MAX));
 	}
 
-	public function testPermission(CommandSender $target, ?string $permission = null) : bool{
+	/**
+	 * @param string        $context    usually the command name, but may include extra args if useful (e.g. for subcommands)
+	 * @param CommandSender $target     the target to check the permission for
+	 * @param string|null   $permission the permission to check, if null, will check if the target has any of the command's permissions
+	 */
+	public function testPermission(string $context, CommandSender $target, ?string $permission = null) : bool{
 		if($this->testPermissionSilent($target, $permission)){
 			return true;
 		}
 
-		$message = $this->permissionMessage ?? KnownTranslationFactory::pocketmine_command_error_permission($this->name);
+		$message = $this->permissionMessage ?? KnownTranslationFactory::pocketmine_command_error_permission($context);
 		if($message instanceof Translatable){
 			$target->sendMessage($message->prefix(TextFormat::RED));
 		}elseif($message !== ""){
@@ -143,62 +112,6 @@ abstract class Command{
 		return false;
 	}
 
-	public function getLabel() : string{
-		return $this->label;
-	}
-
-	public function setLabel(string $name) : bool{
-		$this->nextLabel = $name;
-		if(!$this->isRegistered()){
-			$this->label = $name;
-
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * Registers the command into a Command map
-	 */
-	public function register(CommandMap $commandMap) : bool{
-		if($this->allowChangesFrom($commandMap)){
-			$this->commandMap = $commandMap;
-
-			return true;
-		}
-
-		return false;
-	}
-
-	public function unregister(CommandMap $commandMap) : bool{
-		if($this->allowChangesFrom($commandMap)){
-			$this->commandMap = null;
-			$this->activeAliases = $this->aliases;
-			$this->label = $this->nextLabel;
-
-			return true;
-		}
-
-		return false;
-	}
-
-	private function allowChangesFrom(CommandMap $commandMap) : bool{
-		return $this->commandMap === null || $this->commandMap === $commandMap;
-	}
-
-	public function isRegistered() : bool{
-		return $this->commandMap !== null;
-	}
-
-	/**
-	 * @return string[]
-	 * @phpstan-return list<string>
-	 */
-	public function getAliases() : array{
-		return $this->activeAliases;
-	}
-
 	public function getPermissionMessage() : Translatable|string|null{
 		return $this->permissionMessage;
 	}
@@ -207,22 +120,10 @@ abstract class Command{
 		return $this->description;
 	}
 
-	public function getUsage() : Translatable|string{
+	public function getUsage() : Translatable|string|null{
 		return $this->usageMessage;
 	}
 
-	/**
-	 * @param string[] $aliases
-	 * @phpstan-param list<string> $aliases
-	 */
-	public function setAliases(array $aliases) : void{
-		$aliases = array_values($aliases); //because plugins can and will pass crap
-		$this->aliases = $aliases;
-		if(!$this->isRegistered()){
-			$this->activeAliases = $aliases;
-		}
-	}
-
 	public function setDescription(Translatable|string $description) : void{
 		$this->description = $description;
 	}
@@ -231,7 +132,7 @@ abstract class Command{
 		$this->permissionMessage = $permissionMessage;
 	}
 
-	public function setUsage(Translatable|string $usage) : void{
+	public function setUsage(Translatable|string|null $usage) : void{
 		$this->usageMessage = $usage;
 	}
 
@@ -252,8 +153,4 @@ abstract class Command{
 			}
 		}
 	}
-
-	public function __toString() : string{
-		return $this->name;
-	}
 }

src/command/CommandMap.php

@@ -24,13 +24,12 @@ declare(strict_types=1);
 namespace pocketmine\command;
 
 interface CommandMap{
-
 	/**
-	 * @param Command[] $commands
+	 * @param string[] $otherAliases
+	 *
+	 * @phpstan-param list<string> $otherAliases
 	 */
-	public function registerAll(string $fallbackPrefix, array $commands) : void;
+	public function register(string $fallbackPrefix, Command $command, string $preferredAlias, array $otherAliases = []) : CommandMapEntry;
-
-	public function register(string $fallbackPrefix, Command $command, ?string $label = null) : bool;
 
 	public function dispatch(CommandSender $sender, string $cmdLine) : bool;
 

src/command/CommandMapEntry.php

@@ -0,0 +1,48 @@
+<?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;
+
+use pocketmine\lang\Translatable;
+
+final class CommandMapEntry{
+
+	/**
+	 * @param string[]                       $aliases
+	 * @phpstan-param non-empty-list<string> $aliases
+	 */
+	public function __construct(
+		public readonly Command $command,
+		public readonly array $aliases
+	){}
+
+	public function getPreferredAlias() : string{
+		return $this->aliases[0];
+	}
+
+	public function getUsage() : Translatable|string{
+		//TODO: usage messages ought to use user-specified alias, not command preferred
+		//command-preferred is confusing if the user used a different alias
+		return $this->command->getUsage() ?? "/" . $this->getPreferredAlias();
+	}
+}

src/command/FormattedCommandAlias.php

@@ -50,10 +50,9 @@ class FormattedCommandAlias extends Command{
 	 * @param string[] $formatStrings
 	 */
 	public function __construct(
-		string $alias,
 		private array $formatStrings
 	){
-		parent::__construct($alias, KnownTranslationFactory::pocketmine_command_userDefined_description());
+		parent::__construct(KnownTranslationFactory::pocketmine_command_userDefined_description());
 	}
 
 	public function execute(CommandSender $sender, string $commandLabel, array $args){
@@ -95,12 +94,14 @@ class FormattedCommandAlias extends Command{
 				throw new AssumptionFailedError("This should have been checked before construction");
 			}
 
-			if(($target = $commandMap->getCommand($commandLabel)) !== null){
+			if(($target = $commandMap->getEntry($commandLabel)) !== null){
-				$timings = Timings::getCommandDispatchTimings($target->getLabel());
+				//TODO: using labels for command dispatch is problematic - what if the label changes?
+				//maybe this should use command class instead?
+				$timings = Timings::getCommandDispatchTimings($target->getPreferredAlias());
 				$timings->startTiming();
 
 				try{
-					$target->execute($sender, $commandLabel, $commandArgs);
+					$target->command->execute($sender, $commandLabel, $commandArgs);
 				}catch(InvalidCommandSyntaxException $e){
 					$sender->sendMessage($sender->getLanguage()->translate(KnownTranslationFactory::commands_generic_usage($target->getUsage())));
 				}finally{

src/command/PluginCommand.php

@@ -24,17 +24,23 @@ declare(strict_types=1);
 namespace pocketmine\command;
 
 use pocketmine\command\utils\InvalidCommandSyntaxException;
+use pocketmine\lang\Translatable;
 use pocketmine\plugin\Plugin;
 use pocketmine\plugin\PluginOwned;
 
 final class PluginCommand extends Command implements PluginOwned{
 	public function __construct(
-		string $name,
+		private string $name,
 		private Plugin $owner,
-		private CommandExecutor $executor
+		private CommandExecutor $executor,
+		Translatable|string $description = "",
+		Translatable|string|null $usageMessage = null
 	){
-		parent::__construct($name);
+		parent::__construct($description, $usageMessage);
-		$this->usageMessage = "";
+	}
+
+	public function getName() : string{
+		return $this->name;
 	}
 
 	public function execute(CommandSender $sender, string $commandLabel, array $args){
@@ -43,13 +49,11 @@ final class PluginCommand extends Command implements PluginOwned{
 			return false;
 		}
 
-		$success = $this->executor->onCommand($sender, $this, $commandLabel, $args);
+		if(!$this->executor->onCommand($sender, $this, $commandLabel, $args)){
-
-		if(!$success && $this->usageMessage !== ""){
 			throw new InvalidCommandSyntaxException();
 		}
 
-		return $success;
+		return true;
 	}
 
 	public function getOwningPlugin() : Plugin{

src/command/SimpleCommandMap.php

@@ -61,7 +61,6 @@ use pocketmine\command\defaults\TimeCommand;
 use pocketmine\command\defaults\TimingsCommand;
 use pocketmine\command\defaults\TitleCommand;
 use pocketmine\command\defaults\TransferServerCommand;
-use pocketmine\command\defaults\VanillaCommand;
 use pocketmine\command\defaults\VersionCommand;
 use pocketmine\command\defaults\WhitelistCommand;
 use pocketmine\command\defaults\XpCommand;
@@ -70,12 +69,15 @@ use pocketmine\command\utils\InvalidCommandSyntaxException;
 use pocketmine\lang\KnownTranslationFactory;
 use pocketmine\Server;
 use pocketmine\timings\Timings;
+use pocketmine\utils\AssumptionFailedError;
 use pocketmine\utils\TextFormat;
 use pocketmine\utils\Utils;
+use function array_filter;
 use function array_shift;
 use function array_values;
 use function count;
 use function implode;
+use function spl_object_id;
 use function str_contains;
 use function strcasecmp;
 use function strtolower;
@@ -87,122 +89,124 @@ class SimpleCommandMap implements CommandMap{
 	 * @var Command[]
 	 * @phpstan-var array<string, Command>
 	 */
-	protected array $knownCommands = [];
+	protected array $aliasToCommandMap = [];
+
+	/**
+	 * @var CommandMapEntry[]
+	 * @phpstan-var array<int, CommandMapEntry>
+	 */
+	private array $uniqueCommands = [];
 
 	public function __construct(private Server $server){
 		$this->setDefaultCommands();
 	}
 
 	private function setDefaultCommands() : void{
-		$this->registerAll("pocketmine", [
+		$pmPrefix = "pocketmine";
-			new BanCommand(),
+		$this->register($pmPrefix, new BanCommand(), "ban");
-			new BanIpCommand(),
+		$this->register($pmPrefix, new BanIpCommand(), "ban-ip");
-			new BanListCommand(),
+		$this->register($pmPrefix, new BanListCommand(), "banlist");
-			new ClearCommand(),
+		$this->register($pmPrefix, new ClearCommand(), "clear");
-			new DefaultGamemodeCommand(),
+		$this->register($pmPrefix, new DefaultGamemodeCommand(), "defaultgamemode");
-			new DeopCommand(),
+		$this->register($pmPrefix, new DeopCommand(), "deop");
-			new DifficultyCommand(),
+		$this->register($pmPrefix, new DifficultyCommand(), "difficulty");
-			new DumpMemoryCommand(),
+		$this->register($pmPrefix, new DumpMemoryCommand(), "dumpmemory");
-			new EffectCommand(),
+		$this->register($pmPrefix, new EffectCommand(), "effect");
-			new EnchantCommand(),
+		$this->register($pmPrefix, new EnchantCommand(), "enchant");
-			new GamemodeCommand(),
+		$this->register($pmPrefix, new GamemodeCommand(), "gamemode");
-			new GarbageCollectorCommand(),
+		$this->register($pmPrefix, new GarbageCollectorCommand(), "gc");
-			new GiveCommand(),
+		$this->register($pmPrefix, new GiveCommand(), "give");
-			new HelpCommand(),
+		$this->register($pmPrefix, new HelpCommand(), "help", ["?"]);
-			new KickCommand(),
+		$this->register($pmPrefix, new KickCommand(), "kick");
-			new KillCommand(),
+		$this->register($pmPrefix, new KillCommand(), "kill", ["suicide"]);
-			new ListCommand(),
+		$this->register($pmPrefix, new ListCommand(), "list");
-			new MeCommand(),
+		$this->register($pmPrefix, new MeCommand(), "me");
-			new OpCommand(),
+		$this->register($pmPrefix, new OpCommand(), "op");
-			new PardonCommand(),
+		$this->register($pmPrefix, new PardonCommand(), "pardon", ["unban"]);
-			new PardonIpCommand(),
+		$this->register($pmPrefix, new PardonIpCommand(), "pardon-ip", ["unban-ip"]);
-			new ParticleCommand(),
+		$this->register($pmPrefix, new ParticleCommand(), "particle");
-			new PluginsCommand(),
+		$this->register($pmPrefix, new PluginsCommand(), "plugins", ["pl"]);
-			new SaveCommand(),
+		$this->register($pmPrefix, new SaveCommand(), "save-all");
-			new SaveOffCommand(),
+		$this->register($pmPrefix, new SaveOffCommand(), "save-off");
-			new SaveOnCommand(),
+		$this->register($pmPrefix, new SaveOnCommand(), "save-on");
-			new SayCommand(),
+		$this->register($pmPrefix, new SayCommand(), "say");
-			new SeedCommand(),
+		$this->register($pmPrefix, new SeedCommand(), "seed");
-			new SetWorldSpawnCommand(),
+		$this->register($pmPrefix, new SetWorldSpawnCommand(), "setworldspawn");
-			new SpawnpointCommand(),
+		$this->register($pmPrefix, new SpawnpointCommand(), "spawnpoint");
-			new StatusCommand(),
+		$this->register($pmPrefix, new StatusCommand(), "status");
-			new StopCommand(),
+		$this->register($pmPrefix, new StopCommand(), "stop");
-			new TeleportCommand(),
+		$this->register($pmPrefix, new TeleportCommand(), "tp", ["teleport"]);
-			new TellCommand(),
+		$this->register($pmPrefix, new TellCommand(), "tell", ["w", "msg"]);
-			new TimeCommand(),
+		$this->register($pmPrefix, new TimeCommand(), "time");
-			new TimingsCommand(),
+		$this->register($pmPrefix, new TimingsCommand(), "timings");
-			new TitleCommand(),
+		$this->register($pmPrefix, new TitleCommand(), "title");
-			new TransferServerCommand(),
+		$this->register($pmPrefix, new TransferServerCommand(), "transferserver");
-			new VersionCommand(),
+		$this->register($pmPrefix, new VersionCommand(), "version", ["ver", "about"]);
-			new WhitelistCommand(),
+		$this->register($pmPrefix, new WhitelistCommand(), "whitelist");
-			new XpCommand(),
+		$this->register($pmPrefix, new XpCommand(), "xp");
-		]);
 	}
 
-	public function registerAll(string $fallbackPrefix, array $commands) : void{
+	public function register(string $fallbackPrefix, Command $command, string $preferredAlias, array $otherAliases = []) : CommandMapEntry{
-		foreach($commands as $command){
-			$this->register($fallbackPrefix, $command);
-		}
-	}
-
-	public function register(string $fallbackPrefix, Command $command, ?string $label = null) : bool{
 		if(count($command->getPermissions()) === 0){
 			throw new \InvalidArgumentException("Commands must have a permission set");
 		}
 
-		if($label === null){
+		$preferredAlias = trim($preferredAlias);
-			$label = $command->getLabel();
-		}
-		$label = trim($label);
 		$fallbackPrefix = strtolower(trim($fallbackPrefix));
 
-		$registered = $this->registerAlias($command, false, $fallbackPrefix, $label);
+		$registeredAliases = [];
+		//primary labels take precedence over any existing registrations
+		$this->mapAlias($preferredAlias, $command, $registeredAliases);
+		$this->mapAlias($fallbackPrefix . ":" . $preferredAlias, $command, $registeredAliases);
 
-		$aliases = $command->getAliases();
+		foreach($otherAliases as $alias){
-		foreach($aliases as $index => $alias){
+			$this->mapAlias($fallbackPrefix . ":" . $alias, $command, $registeredAliases);
-			if(!$this->registerAlias($command, true, $fallbackPrefix, $alias)){
+			if(!isset($this->aliasToCommandMap[$alias])){
-				unset($aliases[$index]);
+				$this->mapAlias($alias, $command, $registeredAliases);
 			}
 		}
-		$command->setAliases(array_values($aliases));
 
-		if(!$registered){
+		$entry = new CommandMapEntry($command, $registeredAliases);
-			$command->setLabel($fallbackPrefix . ":" . $label);
+		$this->uniqueCommands[spl_object_id($command)] = $entry;
+
+		return $entry;
 	}
 
-		$command->register($this);
+	/**
+	 * @param string[] &$registeredAliases
+	 * @phpstan-param list<string> &$registeredAliases
+	 * @phpstan-param-out non-empty-list<string> $registeredAliases
+	 */
+	private function mapAlias(string $alias, Command $command, array &$registeredAliases) : void{
+		$this->unmapAlias($alias);
+		$this->aliasToCommandMap[$alias] = $command;
+		$registeredAliases[] = $alias;
+	}
 
-		return $registered;
+	private function unmapAlias(string $alias) : void{
+		$oldCommand = $this->aliasToCommandMap[$alias] ?? null;
+		if($oldCommand !== null){
+			unset($this->aliasToCommandMap[$alias]);
+			$oldCommandKey = spl_object_id($oldCommand);
+			$oldCommandEntry = $this->uniqueCommands[$oldCommandKey];
+			$filteredAliases = array_values(array_filter($oldCommandEntry->aliases, fn(string $oldAlias) => $oldAlias !== $alias));
+			if(count($filteredAliases) > 0){
+				$this->uniqueCommands[$oldCommandKey] = new CommandMapEntry($oldCommand, $filteredAliases);
+			}else{
+				unset($this->uniqueCommands[$oldCommandKey]);
+			}
+		}
 	}
 
 	public function unregister(Command $command) : bool{
-		foreach(Utils::promoteKeys($this->knownCommands) as $lbl => $cmd){
+		$entry = $this->uniqueCommands[spl_object_id($command)] ?? null;
-			if($cmd === $command){
+		if($entry !== null){
-				unset($this->knownCommands[$lbl]);
+			unset($this->uniqueCommands[spl_object_id($command)]);
+			foreach($entry->aliases as $alias){
+				unset($this->aliasToCommandMap[$alias]);
 			}
 		}
 
-		$command->unregister($this);
-
-		return true;
-	}
-
-	private function registerAlias(Command $command, bool $isAlias, string $fallbackPrefix, string $label) : bool{
-		$this->knownCommands[$fallbackPrefix . ":" . $label] = $command;
-		if(($command instanceof VanillaCommand || $isAlias) && isset($this->knownCommands[$label])){
-			return false;
-		}
-
-		if(isset($this->knownCommands[$label]) && $this->knownCommands[$label]->getLabel() === $label){
-			return false;
-		}
-
-		if(!$isAlias){
-			$command->setLabel($label);
-		}
-
-		$this->knownCommands[$label] = $command;
-
 		return true;
 	}
 
@@ -210,13 +214,15 @@ class SimpleCommandMap implements CommandMap{
 		$args = CommandStringHelper::parseQuoteAware($commandLine);
 
 		$sentCommandLabel = array_shift($args);
-		if($sentCommandLabel !== null && ($target = $this->getCommand($sentCommandLabel)) !== null){
+		if($sentCommandLabel !== null && ($target = $this->getEntry($sentCommandLabel)) !== null){
-			$timings = Timings::getCommandDispatchTimings($target->getLabel());
+			//TODO: using labels for command dispatch is problematic - what if the label changes?
+			//maybe this should use command class instead?
+			$timings = Timings::getCommandDispatchTimings($target->getPreferredAlias());
 			$timings->startTiming();
 
 			try{
-				if($target->testPermission($sender)){
+				if($target->command->testPermission($sentCommandLabel, $sender)){
-					$target->execute($sender, $sentCommandLabel, $args);
+					$target->command->execute($sender, $sentCommandLabel, $args);
 				}
 			}catch(InvalidCommandSyntaxException $e){
 				$sender->sendMessage($sender->getLanguage()->translate(KnownTranslationFactory::commands_generic_usage($target->getUsage())));
@@ -231,23 +237,36 @@ class SimpleCommandMap implements CommandMap{
 	}
 
 	public function clearCommands() : void{
-		foreach($this->knownCommands as $command){
+		$this->aliasToCommandMap = [];
-			$command->unregister($this);
+		$this->uniqueCommands = [];
-		}
-		$this->knownCommands = [];
 		$this->setDefaultCommands();
 	}
 
 	public function getCommand(string $name) : ?Command{
-		return $this->knownCommands[$name] ?? null;
+		return $this->aliasToCommandMap[$name] ?? null;
 	}
 
 	/**
 	 * @return Command[]
 	 * @phpstan-return array<string, Command>
 	 */
-	public function getCommands() : array{
+	public function getAliasToCommandMap() : array{
-		return $this->knownCommands;
+		return $this->aliasToCommandMap;
+	}
+
+	/**
+	 * @return CommandMapEntry[]
+	 * @phpstan-return array<int, CommandMapEntry>
+	 */
+	public function getUniqueCommands() : array{
+		return $this->uniqueCommands;
+	}
+
+	public function getEntry(string $name) : ?CommandMapEntry{
+		$command = $this->getCommand($name);
+		return $command !== null ?
+			$this->uniqueCommands[spl_object_id($command)] ?? throw new AssumptionFailedError("This should never be unset") :
+			null;
 	}
 
 	public function registerServerAliases() : void{
@@ -289,12 +308,13 @@ class SimpleCommandMap implements CommandMap{
 
 			//These registered commands have absolute priority
 			$lowerAlias = strtolower($alias);
+			$this->unmapAlias($lowerAlias);
 			if(count($targets) > 0){
-				$this->knownCommands[$lowerAlias] = new FormattedCommandAlias($lowerAlias, $targets);
+				$aliasInstance = new FormattedCommandAlias($targets);
-			}else{
+				$registeredAliases = [];
-				unset($this->knownCommands[$lowerAlias]);
+				$this->mapAlias($lowerAlias, $aliasInstance, $registeredAliases);
-			}
+				$this->uniqueCommands[spl_object_id($aliasInstance)] = new CommandMapEntry($aliasInstance, $registeredAliases);
-
+			}
 		}
 	}
 }

src/command/defaults/BanCommand.php

@@ -37,7 +37,6 @@ class BanCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"ban",
 			KnownTranslationFactory::pocketmine_command_ban_player_description(),
 			KnownTranslationFactory::commands_ban_usage()
 		);

src/command/defaults/BanIpCommand.php

@@ -38,7 +38,6 @@ class BanIpCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"ban-ip",
 			KnownTranslationFactory::pocketmine_command_ban_ip_description(),
 			KnownTranslationFactory::commands_banip_usage()
 		);

src/command/defaults/BanListCommand.php

@@ -39,7 +39,6 @@ class BanListCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"banlist",
 			KnownTranslationFactory::pocketmine_command_banlist_description(),
 			KnownTranslationFactory::commands_banlist_usage()
 		);

src/command/defaults/ClearCommand.php

@@ -41,7 +41,6 @@ class ClearCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"clear",
 			KnownTranslationFactory::pocketmine_command_clear_description(),
 			KnownTranslationFactory::pocketmine_command_clear_usage()
 		);
@@ -53,7 +52,7 @@ class ClearCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$target = $this->fetchPermittedPlayerTarget($sender, $args[0] ?? null, DefaultPermissionNames::COMMAND_CLEAR_SELF, DefaultPermissionNames::COMMAND_CLEAR_OTHER);
+		$target = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0] ?? null, DefaultPermissionNames::COMMAND_CLEAR_SELF, DefaultPermissionNames::COMMAND_CLEAR_OTHER);
 		if($target === null){
 			return true;
 		}

src/command/defaults/DefaultGamemodeCommand.php

@@ -35,7 +35,6 @@ class DefaultGamemodeCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"defaultgamemode",
 			KnownTranslationFactory::pocketmine_command_defaultgamemode_description(),
 			KnownTranslationFactory::commands_defaultgamemode_usage()
 		);

src/command/defaults/DeopCommand.php

@@ -37,7 +37,6 @@ class DeopCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"deop",
 			KnownTranslationFactory::pocketmine_command_deop_description(),
 			KnownTranslationFactory::commands_deop_usage()
 		);

src/command/defaults/DifficultyCommand.php

@@ -36,7 +36,6 @@ class DifficultyCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"difficulty",
 			KnownTranslationFactory::pocketmine_command_difficulty_description(),
 			KnownTranslationFactory::commands_difficulty_usage()
 		);

src/command/defaults/DumpMemoryCommand.php

@@ -33,7 +33,6 @@ class DumpMemoryCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"dumpmemory",
 			KnownTranslationFactory::pocketmine_command_dumpmemory_description(),
 			"/dumpmemory [path]"
 		);

src/command/defaults/EffectCommand.php

@@ -38,7 +38,6 @@ class EffectCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"effect",
 			KnownTranslationFactory::pocketmine_command_effect_description(),
 			KnownTranslationFactory::commands_effect_usage()
 		);
@@ -53,7 +52,7 @@ class EffectCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$player = $this->fetchPermittedPlayerTarget($sender, $args[0], DefaultPermissionNames::COMMAND_EFFECT_SELF, DefaultPermissionNames::COMMAND_EFFECT_OTHER);
+		$player = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0], DefaultPermissionNames::COMMAND_EFFECT_SELF, DefaultPermissionNames::COMMAND_EFFECT_OTHER);
 		if($player === null){
 			return true;
 		}

src/command/defaults/EnchantCommand.php

@@ -36,7 +36,6 @@ class EnchantCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"enchant",
 			KnownTranslationFactory::pocketmine_command_enchant_description(),
 			KnownTranslationFactory::commands_enchant_usage()
 		);
@@ -51,7 +50,7 @@ class EnchantCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$player = $this->fetchPermittedPlayerTarget($sender, $args[0], DefaultPermissionNames::COMMAND_ENCHANT_SELF, DefaultPermissionNames::COMMAND_ENCHANT_OTHER);
+		$player = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0], DefaultPermissionNames::COMMAND_ENCHANT_SELF, DefaultPermissionNames::COMMAND_ENCHANT_OTHER);
 		if($player === null){
 			return true;
 		}

src/command/defaults/GamemodeCommand.php

@@ -35,7 +35,6 @@ class GamemodeCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"gamemode",
 			KnownTranslationFactory::pocketmine_command_gamemode_description(),
 			KnownTranslationFactory::commands_gamemode_usage()
 		);
@@ -56,7 +55,7 @@ class GamemodeCommand extends VanillaCommand{
 			return true;
 		}
 
-		$target = $this->fetchPermittedPlayerTarget($sender, $args[1] ?? null, DefaultPermissionNames::COMMAND_GAMEMODE_SELF, DefaultPermissionNames::COMMAND_GAMEMODE_OTHER);
+		$target = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[1] ?? null, DefaultPermissionNames::COMMAND_GAMEMODE_SELF, DefaultPermissionNames::COMMAND_GAMEMODE_OTHER);
 		if($target === null){
 			return true;
 		}

src/command/defaults/GarbageCollectorCommand.php

@@ -36,7 +36,6 @@ class GarbageCollectorCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"gc",
 			KnownTranslationFactory::pocketmine_command_gc_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_GC);

src/command/defaults/GiveCommand.php

@@ -43,7 +43,6 @@ class GiveCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"give",
 			KnownTranslationFactory::pocketmine_command_give_description(),
 			KnownTranslationFactory::pocketmine_command_give_usage()
 		);
@@ -58,7 +57,7 @@ class GiveCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$player = $this->fetchPermittedPlayerTarget($sender, $args[0], DefaultPermissionNames::COMMAND_GIVE_SELF, DefaultPermissionNames::COMMAND_GIVE_OTHER);
+		$player = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0], DefaultPermissionNames::COMMAND_GIVE_SELF, DefaultPermissionNames::COMMAND_GIVE_OTHER);
 		if($player === null){
 			return true;
 		}

src/command/defaults/HelpCommand.php

@@ -47,10 +47,8 @@ class HelpCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"help",
 			KnownTranslationFactory::pocketmine_command_help_description(),
-			KnownTranslationFactory::commands_help_usage(),
+			KnownTranslationFactory::commands_help_usage()
-			["?"]
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_HELP);
 	}
@@ -72,11 +70,13 @@ class HelpCommand extends VanillaCommand{
 
 		$pageHeight = $sender->getScreenLineHeight();
 
+		//TODO: maybe inject this in the constructor instead of assuming the server's command map?
+		$commandMap = $sender->getServer()->getCommandMap();
 		if($commandName === ""){
 			$commands = [];
-			foreach($sender->getServer()->getCommandMap()->getCommands() as $command){
+			foreach($commandMap->getUniqueCommands() as $commandEntry){
-				if($command->testPermissionSilent($sender)){
+				if($commandEntry->command->testPermissionSilent($sender)){
-					$commands[$command->getLabel()] = $command;
+					$commands[$commandEntry->getPreferredAlias()] = $commandEntry;
 				}
 			}
 			ksort($commands, SORT_NATURAL | SORT_FLAG_CASE);
@@ -88,31 +88,31 @@ class HelpCommand extends VanillaCommand{
 			$sender->sendMessage(KnownTranslationFactory::commands_help_header((string) $pageNumber, (string) count($commands)));
 			$lang = $sender->getLanguage();
 			if(isset($commands[$pageNumber - 1])){
-				foreach($commands[$pageNumber - 1] as $command){
+				foreach($commands[$pageNumber - 1] as $commandEntry){
-					$description = $command->getDescription();
+					$description = $commandEntry->command->getDescription();
 					$descriptionString = $description instanceof Translatable ? $lang->translate($description) : $description;
-					$sender->sendMessage(TextFormat::DARK_GREEN . "/" . $command->getLabel() . ": " . TextFormat::RESET . $descriptionString);
+					$sender->sendMessage(TextFormat::DARK_GREEN . "/" . $commandEntry->getPreferredAlias() . ": " . TextFormat::RESET . $descriptionString);
 				}
 			}
 
 			return true;
 		}else{
-			if(($cmd = $sender->getServer()->getCommandMap()->getCommand(strtolower($commandName))) instanceof Command){
+			if(($commandEntry = $commandMap->getEntry(strtolower($commandName))) !== null){
-				if($cmd->testPermissionSilent($sender)){
+				if($commandEntry->command->testPermissionSilent($sender)){
 					$lang = $sender->getLanguage();
-					$description = $cmd->getDescription();
+					$description = $commandEntry->command->getDescription();
 					$descriptionString = $description instanceof Translatable ? $lang->translate($description) : $description;
-					$sender->sendMessage(KnownTranslationFactory::pocketmine_command_help_specificCommand_header($cmd->getLabel())
+					$sender->sendMessage(KnownTranslationFactory::pocketmine_command_help_specificCommand_header($commandEntry->getPreferredAlias())
 						->format(TextFormat::YELLOW . "--------- " . TextFormat::RESET, TextFormat::YELLOW . " ---------"));
 					$sender->sendMessage(KnownTranslationFactory::pocketmine_command_help_specificCommand_description(TextFormat::RESET . $descriptionString)
 						->prefix(TextFormat::GOLD));
 
-					$usage = $cmd->getUsage();
+					$usage = $commandEntry->getUsage();
 					$usageString = $usage instanceof Translatable ? $lang->translate($usage) : $usage;
 					$sender->sendMessage(KnownTranslationFactory::pocketmine_command_help_specificCommand_usage(TextFormat::RESET . implode("\n" . TextFormat::RESET, explode("\n", $usageString, limit: PHP_INT_MAX)))
 						->prefix(TextFormat::GOLD));
 
-					$aliases = $cmd->getAliases();
+					$aliases = $commandEntry->aliases;
 					sort($aliases, SORT_NATURAL);
 					$sender->sendMessage(KnownTranslationFactory::pocketmine_command_help_specificCommand_aliases(TextFormat::RESET . implode(", ", $aliases))
 						->prefix(TextFormat::GOLD));

src/command/defaults/KickCommand.php

@@ -39,7 +39,6 @@ class KickCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"kick",
 			KnownTranslationFactory::pocketmine_command_kick_description(),
 			KnownTranslationFactory::commands_kick_usage()
 		);

src/command/defaults/KillCommand.php

@@ -35,10 +35,8 @@ class KillCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"kill",
 			KnownTranslationFactory::pocketmine_command_kill_description(),
-			KnownTranslationFactory::pocketmine_command_kill_usage(),
+			KnownTranslationFactory::pocketmine_command_kill_usage()
-			["suicide"]
 		);
 		$this->setPermissions([DefaultPermissionNames::COMMAND_KILL_SELF, DefaultPermissionNames::COMMAND_KILL_OTHER]);
 	}
@@ -48,7 +46,7 @@ class KillCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$player = $this->fetchPermittedPlayerTarget($sender, $args[0] ?? null, DefaultPermissionNames::COMMAND_KILL_SELF, DefaultPermissionNames::COMMAND_KILL_OTHER);
+		$player = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0] ?? null, DefaultPermissionNames::COMMAND_KILL_SELF, DefaultPermissionNames::COMMAND_KILL_OTHER);
 		if($player === null){
 			return true;
 		}

src/command/defaults/ListCommand.php

@@ -38,7 +38,6 @@ class ListCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"list",
 			KnownTranslationFactory::pocketmine_command_list_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_LIST);

src/command/defaults/MeCommand.php

@@ -36,7 +36,6 @@ class MeCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"me",
 			KnownTranslationFactory::pocketmine_command_me_description(),
 			KnownTranslationFactory::commands_me_usage()
 		);

src/command/defaults/OpCommand.php

@@ -37,7 +37,6 @@ class OpCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"op",
 			KnownTranslationFactory::pocketmine_command_op_description(),
 			KnownTranslationFactory::commands_op_usage()
 		);

src/command/defaults/PardonCommand.php

@@ -34,10 +34,8 @@ class PardonCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"pardon",
 			KnownTranslationFactory::pocketmine_command_unban_player_description(),
-			KnownTranslationFactory::commands_unban_usage(),
+			KnownTranslationFactory::commands_unban_usage()
-			["unban"]
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_UNBAN_PLAYER);
 	}

src/command/defaults/PardonIpCommand.php

@@ -35,10 +35,8 @@ class PardonIpCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"pardon-ip",
 			KnownTranslationFactory::pocketmine_command_unban_ip_description(),
-			KnownTranslationFactory::commands_unbanip_usage(),
+			KnownTranslationFactory::commands_unbanip_usage()
-			["unban-ip"]
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_UNBAN_IP);
 	}

src/command/defaults/ParticleCommand.php

@@ -76,7 +76,6 @@ class ParticleCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"particle",
 			KnownTranslationFactory::pocketmine_command_particle_description(),
 			KnownTranslationFactory::pocketmine_command_particle_usage()
 		);

src/command/defaults/PluginsCommand.php

@@ -38,10 +38,8 @@ class PluginsCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"plugins",
 			KnownTranslationFactory::pocketmine_command_plugins_description(),
-			null,
+			null
-			["pl"]
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_PLUGINS);
 	}

src/command/defaults/SaveCommand.php

@@ -34,7 +34,6 @@ class SaveCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"save-all",
 			KnownTranslationFactory::pocketmine_command_save_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_SAVE_PERFORM);

src/command/defaults/SaveOffCommand.php

@@ -32,7 +32,6 @@ class SaveOffCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"save-off",
 			KnownTranslationFactory::pocketmine_command_saveoff_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_SAVE_DISABLE);

src/command/defaults/SaveOnCommand.php

@@ -32,7 +32,6 @@ class SaveOnCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"save-on",
 			KnownTranslationFactory::pocketmine_command_saveon_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_SAVE_ENABLE);

src/command/defaults/SayCommand.php

@@ -37,7 +37,6 @@ class SayCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"say",
 			KnownTranslationFactory::pocketmine_command_say_description(),
 			KnownTranslationFactory::commands_say_usage()
 		);

src/command/defaults/SeedCommand.php

@@ -32,7 +32,6 @@ class SeedCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"seed",
 			KnownTranslationFactory::pocketmine_command_seed_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_SEED);

src/command/defaults/SetWorldSpawnCommand.php

@@ -38,7 +38,6 @@ class SetWorldSpawnCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"setworldspawn",
 			KnownTranslationFactory::pocketmine_command_setworldspawn_description(),
 			KnownTranslationFactory::commands_setworldspawn_usage()
 		);

src/command/defaults/SpawnpointCommand.php

@@ -38,7 +38,6 @@ class SpawnpointCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"spawnpoint",
 			KnownTranslationFactory::pocketmine_command_spawnpoint_description(),
 			KnownTranslationFactory::commands_spawnpoint_usage()
 		);
@@ -49,7 +48,7 @@ class SpawnpointCommand extends VanillaCommand{
 	}
 
 	public function execute(CommandSender $sender, string $commandLabel, array $args){
-		$target = $this->fetchPermittedPlayerTarget($sender, $args[0] ?? null, DefaultPermissionNames::COMMAND_SPAWNPOINT_SELF, DefaultPermissionNames::COMMAND_SPAWNPOINT_OTHER);
+		$target = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0] ?? null, DefaultPermissionNames::COMMAND_SPAWNPOINT_SELF, DefaultPermissionNames::COMMAND_SPAWNPOINT_OTHER);
 		if($target === null){
 			return true;
 		}

src/command/defaults/StatusCommand.php

@@ -38,7 +38,6 @@ class StatusCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"status",
 			KnownTranslationFactory::pocketmine_command_status_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_STATUS);

src/command/defaults/StopCommand.php

@@ -32,7 +32,6 @@ class StopCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"stop",
 			KnownTranslationFactory::pocketmine_command_stop_description()
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_STOP);

src/command/defaults/TeleportCommand.php

@@ -41,10 +41,8 @@ class TeleportCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"tp",
 			KnownTranslationFactory::pocketmine_command_tp_description(),
-			KnownTranslationFactory::commands_tp_usage(),
+			KnownTranslationFactory::commands_tp_usage()
-			["teleport"]
 		);
 		$this->setPermissions([
 			DefaultPermissionNames::COMMAND_TELEPORT_SELF,
@@ -77,7 +75,7 @@ class TeleportCommand extends VanillaCommand{
 				throw new InvalidCommandSyntaxException();
 		}
 
-		$subject = $this->fetchPermittedPlayerTarget($sender, $subjectName, DefaultPermissionNames::COMMAND_TELEPORT_SELF, DefaultPermissionNames::COMMAND_TELEPORT_OTHER);
+		$subject = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $subjectName, DefaultPermissionNames::COMMAND_TELEPORT_SELF, DefaultPermissionNames::COMMAND_TELEPORT_OTHER);
 		if($subject === null){
 			return true;
 		}

src/command/defaults/TellCommand.php

@@ -38,10 +38,8 @@ class TellCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"tell",
 			KnownTranslationFactory::pocketmine_command_tell_description(),
-			KnownTranslationFactory::commands_message_usage(),
+			KnownTranslationFactory::commands_message_usage()
-			["w", "msg"]
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_TELL);
 	}

src/command/defaults/TimeCommand.php

@@ -36,7 +36,6 @@ class TimeCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"time",
 			KnownTranslationFactory::pocketmine_command_time_description(),
 			KnownTranslationFactory::pocketmine_command_time_usage()
 		);
@@ -53,9 +52,10 @@ class TimeCommand extends VanillaCommand{
 		if(count($args) < 1){
 			throw new InvalidCommandSyntaxException();
 		}
+		$testPermissionCtx = $commandLabel . " " . $args[0];
 
 		if($args[0] === "start"){
-			if(!$this->testPermission($sender, DefaultPermissionNames::COMMAND_TIME_START)){
+			if(!$this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_TIME_START)){
 				return true;
 			}
 			foreach($sender->getServer()->getWorldManager()->getWorlds() as $world){
@@ -64,7 +64,7 @@ class TimeCommand extends VanillaCommand{
 			Command::broadcastCommandMessage($sender, "Restarted the time");
 			return true;
 		}elseif($args[0] === "stop"){
-			if(!$this->testPermission($sender, DefaultPermissionNames::COMMAND_TIME_STOP)){
+			if(!$this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_TIME_STOP)){
 				return true;
 			}
 			foreach($sender->getServer()->getWorldManager()->getWorlds() as $world){
@@ -73,7 +73,7 @@ class TimeCommand extends VanillaCommand{
 			Command::broadcastCommandMessage($sender, "Stopped the time");
 			return true;
 		}elseif($args[0] === "query"){
-			if(!$this->testPermission($sender, DefaultPermissionNames::COMMAND_TIME_QUERY)){
+			if(!$this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_TIME_QUERY)){
 				return true;
 			}
 			if($sender instanceof Player){
@@ -90,7 +90,7 @@ class TimeCommand extends VanillaCommand{
 		}
 
 		if($args[0] === "set"){
-			if(!$this->testPermission($sender, DefaultPermissionNames::COMMAND_TIME_SET)){
+			if(!$this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_TIME_SET)){
 				return true;
 			}
 
@@ -123,7 +123,7 @@ class TimeCommand extends VanillaCommand{
 			}
 			Command::broadcastCommandMessage($sender, KnownTranslationFactory::commands_time_set((string) $value));
 		}elseif($args[0] === "add"){
-			if(!$this->testPermission($sender, DefaultPermissionNames::COMMAND_TIME_ADD)){
+			if(!$this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_TIME_ADD)){
 				return true;
 			}
 

src/command/defaults/TimingsCommand.php

@@ -62,7 +62,6 @@ class TimingsCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"timings",
 			KnownTranslationFactory::pocketmine_command_timings_description(),
 			KnownTranslationFactory::pocketmine_command_timings_usage()
 		);

src/command/defaults/TitleCommand.php

@@ -35,7 +35,6 @@ class TitleCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"title",
 			KnownTranslationFactory::pocketmine_command_title_description(),
 			KnownTranslationFactory::commands_title_usage()
 		);
@@ -50,7 +49,7 @@ class TitleCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$player = $this->fetchPermittedPlayerTarget($sender, $args[0], DefaultPermissionNames::COMMAND_TITLE_SELF, DefaultPermissionNames::COMMAND_TITLE_OTHER);
+		$player = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[0], DefaultPermissionNames::COMMAND_TITLE_SELF, DefaultPermissionNames::COMMAND_TITLE_OTHER);
 		if($player === null){
 			return true;
 		}

src/command/defaults/TransferServerCommand.php

@@ -34,7 +34,6 @@ class TransferServerCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"transferserver",
 			KnownTranslationFactory::pocketmine_command_transferserver_description(),
 			KnownTranslationFactory::pocketmine_command_transferserver_usage()
 		);

src/command/defaults/VanillaCommand.php

@@ -36,7 +36,13 @@ abstract class VanillaCommand extends Command{
 	public const MAX_COORD = 30000000;
 	public const MIN_COORD = -30000000;
 
-	protected function fetchPermittedPlayerTarget(CommandSender $sender, ?string $target, string $selfPermission, string $otherPermission) : ?Player{
+	protected function fetchPermittedPlayerTarget(
+		string $testPermissionContext,
+		CommandSender $sender,
+		?string $target,
+		string $selfPermission,
+		string $otherPermission
+	) : ?Player{
 		if($target !== null){
 			$player = $sender->getServer()->getPlayerByPrefix($target);
 		}elseif($sender instanceof Player){
@@ -49,9 +55,12 @@ abstract class VanillaCommand extends Command{
 			$sender->sendMessage(KnownTranslationFactory::commands_generic_player_notFound()->prefix(TextFormat::RED));
 			return null;
 		}
+		//TODO: using loud testPermission here will generate misleading messages
+		//e.g. if the sender has self permission and tries to use the command on another player, it will give them a
+		//generic message saying that they don't have permission to use the command, which is not correct
 		if(
-			($player === $sender && $this->testPermission($sender, $selfPermission)) ||
+			($player === $sender && $this->testPermission($testPermissionContext, $sender, $selfPermission)) ||
-			($player !== $sender && $this->testPermission($sender, $otherPermission))
+			($player !== $sender && $this->testPermission($testPermissionContext, $sender, $otherPermission))
 		){
 			return $player;
 		}

src/command/defaults/VersionCommand.php

@@ -42,10 +42,8 @@ class VersionCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"version",
 			KnownTranslationFactory::pocketmine_command_version_description(),
-			KnownTranslationFactory::pocketmine_command_version_usage(),
+			KnownTranslationFactory::pocketmine_command_version_usage()
-			["ver", "about"]
 		);
 		$this->setPermission(DefaultPermissionNames::COMMAND_VERSION);
 	}

src/command/defaults/WhitelistCommand.php

@@ -41,7 +41,6 @@ class WhitelistCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"whitelist",
 			KnownTranslationFactory::pocketmine_command_whitelist_description(),
 			KnownTranslationFactory::commands_whitelist_usage()
 		);
@@ -56,10 +55,14 @@ class WhitelistCommand extends VanillaCommand{
 	}
 
 	public function execute(CommandSender $sender, string $commandLabel, array $args){
+		if(count($args) === 0){
+			throw new InvalidCommandSyntaxException();
+		}
+		$testPermissionCtx = $commandLabel . " " . $args[0];
 		if(count($args) === 1){
 			switch(strtolower($args[0])){
 				case "reload":
-					if($this->testPermission($sender, DefaultPermissionNames::COMMAND_WHITELIST_RELOAD)){
+					if($this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_WHITELIST_RELOAD)){
 						$server = $sender->getServer();
 						$server->getWhitelisted()->reload();
 						if($server->hasWhitelist()){
@@ -70,7 +73,7 @@ class WhitelistCommand extends VanillaCommand{
 
 					return true;
 				case "on":
-					if($this->testPermission($sender, DefaultPermissionNames::COMMAND_WHITELIST_ENABLE)){
+					if($this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_WHITELIST_ENABLE)){
 						$server = $sender->getServer();
 						$server->getConfigGroup()->setConfigBool(ServerProperties::WHITELIST, true);
 						$this->kickNonWhitelistedPlayers($server);
@@ -79,14 +82,14 @@ class WhitelistCommand extends VanillaCommand{
 
 					return true;
 				case "off":
-					if($this->testPermission($sender, DefaultPermissionNames::COMMAND_WHITELIST_DISABLE)){
+					if($this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_WHITELIST_DISABLE)){
 						$sender->getServer()->getConfigGroup()->setConfigBool(ServerProperties::WHITELIST, false);
 						Command::broadcastCommandMessage($sender, KnownTranslationFactory::commands_whitelist_disabled());
 					}
 
 					return true;
 				case "list":
-					if($this->testPermission($sender, DefaultPermissionNames::COMMAND_WHITELIST_LIST)){
+					if($this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_WHITELIST_LIST)){
 						$entries = $sender->getServer()->getWhitelisted()->getAll(true);
 						sort($entries, SORT_STRING);
 						$result = implode(", ", $entries);
@@ -112,14 +115,14 @@ class WhitelistCommand extends VanillaCommand{
 			}
 			switch(strtolower($args[0])){
 				case "add":
-					if($this->testPermission($sender, DefaultPermissionNames::COMMAND_WHITELIST_ADD)){
+					if($this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_WHITELIST_ADD)){
 						$sender->getServer()->addWhitelist($args[1]);
 						Command::broadcastCommandMessage($sender, KnownTranslationFactory::commands_whitelist_add_success($args[1]));
 					}
 
 					return true;
 				case "remove":
-					if($this->testPermission($sender, DefaultPermissionNames::COMMAND_WHITELIST_REMOVE)){
+					if($this->testPermission($testPermissionCtx, $sender, DefaultPermissionNames::COMMAND_WHITELIST_REMOVE)){
 						$server = $sender->getServer();
 						$server->removeWhitelist($args[1]);
 						if(!$server->isWhitelisted($args[1])){

src/command/defaults/XpCommand.php

@@ -40,7 +40,6 @@ class XpCommand extends VanillaCommand{
 
 	public function __construct(){
 		parent::__construct(
-			"xp",
 			KnownTranslationFactory::pocketmine_command_xp_description(),
 			KnownTranslationFactory::pocketmine_command_xp_usage()
 		);
@@ -55,7 +54,7 @@ class XpCommand extends VanillaCommand{
 			throw new InvalidCommandSyntaxException();
 		}
 
-		$player = $this->fetchPermittedPlayerTarget($sender, $args[1] ?? null, DefaultPermissionNames::COMMAND_XP_SELF, DefaultPermissionNames::COMMAND_XP_OTHER);
+		$player = $this->fetchPermittedPlayerTarget($commandLabel, $sender, $args[1] ?? null, DefaultPermissionNames::COMMAND_XP_SELF, DefaultPermissionNames::COMMAND_XP_OTHER);
 		if($player === null){
 			return true;
 		}

src/network/mcpe/NetworkSession.php

@@ -117,13 +117,14 @@ use pocketmine\world\format\io\GlobalItemDataHandlers;
 use pocketmine\world\Position;
 use pocketmine\world\World;
 use pocketmine\YmlServerProperties;
+use function array_filter;
 use function array_map;
+use function array_values;
 use function base64_encode;
 use function bin2hex;
 use function count;
 use function get_class;
 use function implode;
-use function in_array;
 use function is_string;
 use function json_encode;
 use function ord;
@@ -1088,23 +1089,23 @@ class NetworkSession{
 
 	public function syncAvailableCommands() : void{
 		$commandData = [];
-		foreach($this->server->getCommandMap()->getCommands() as $command){
+		foreach($this->server->getCommandMap()->getUniqueCommands() as $commandEntry){
-			if(isset($commandData[$command->getLabel()]) || $command->getLabel() === "help" || !$command->testPermissionSilent($this->player)){
+			if(!$commandEntry->command->testPermissionSilent($this->player)){
 				continue;
 			}
 
-			$lname = strtolower($command->getLabel());
+			//the client doesn't like it when we override /help
-			$aliases = $command->getAliases();
+			$aliases = array_values(array_filter($commandEntry->aliases, fn(string $alias) => $alias !== "help" && $alias !== "?"));
-			$aliasObj = null;
+			if(count($aliases) === 0){
-			if(count($aliases) > 0){
+				continue;
-				if(!in_array($lname, $aliases, true)){
-					//work around a client bug which makes the original name not show when aliases are used
-					$aliases[] = $lname;
-				}
-				$aliasObj = new CommandEnum(ucfirst($command->getLabel()) . "Aliases", $aliases);
 			}
+			$firstNetworkAlias = $aliases[0];
+			//use filtered aliases for command name discovery - this allows /help to still be shown as /pocketmine:help
+			//on the client without conflicting with the client's built-in /help command
+			$lname = strtolower($firstNetworkAlias);
+			$aliasObj = new CommandEnum(ucfirst($firstNetworkAlias) . "Aliases", $aliases);
 
-			$description = $command->getDescription();
+			$description = $commandEntry->command->getDescription();
 			$data = new CommandData(
 				$lname, //TODO: commands containing uppercase letters in the name crash 1.9.0 client
 				$description instanceof Translatable ? $this->player->getLanguage()->translate($description) : $description,
@@ -1117,7 +1118,7 @@ class NetworkSession{
 				chainedSubCommandData: []
 			);
 
-			$commandData[$command->getLabel()] = $data;
+			$commandData[] = $data;
 		}
 
 		$this->sendDataPacket(AvailableCommandsPacket::create($commandData, [], [], []));

src/plugin/PluginBase.php

@@ -34,7 +34,6 @@ use pocketmine\utils\Config;
 use pocketmine\utils\Utils;
 use Symfony\Component\Filesystem\Path;
 use function copy;
-use function count;
 use function dirname;
 use function file_exists;
 use function fopen;
@@ -146,23 +145,12 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 	 * Registers commands declared in the plugin manifest
 	 */
 	private function registerYamlCommands() : void{
-		$pluginCmds = [];
-
 		foreach(Utils::stringifyKeys($this->description->getCommands()) as $key => $data){
 			if(str_contains($key, ":")){
 				$this->logger->error($this->server->getLanguage()->translate(KnownTranslationFactory::pocketmine_plugin_commandError($key, $this->description->getFullName(), ":")));
 				continue;
 			}
 
-			$newCmd = new PluginCommand($key, $this, $this);
-			if(($description = $data->getDescription()) !== null){
-				$newCmd->setDescription($description);
-			}
-
-			if(($usageMessage = $data->getUsageMessage()) !== null){
-				$newCmd->setUsage($usageMessage);
-			}
-
 			$aliasList = [];
 			foreach($data->getAliases() as $alias){
 				if(str_contains($alias, ":")){
@@ -172,7 +160,13 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 				$aliasList[] = $alias;
 			}
 
-			$newCmd->setAliases($aliasList);
+			$newCmd = new PluginCommand(
+				$key,
+				$this,
+				$this,
+				$data->getDescription() ?? "",
+				$data->getUsageMessage() ?? ""
+			);
 
 			$newCmd->setPermission($data->getPermission());
 
@@ -180,11 +174,7 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 				$newCmd->setPermissionMessage($permissionDeniedMessage);
 			}
 
-			$pluginCmds[] = $newCmd;
+			$this->server->getCommandMap()->register($this->description->getName(), $newCmd, $key, $aliasList);
-		}
-
-		if(count($pluginCmds) > 0){
-			$this->server->getCommandMap()->registerAll($this->description->getName(), $pluginCmds);
 		}
 	}