Moved console-specific stuff to its own namespace

this stuff has different functionality than everything else in the
command namespace (specifically console handling), so it doesn't belong
in here.

I know that this will probably break some plugins, but I don't care,
because plugins shouldn't have been abusing ConsoleCommandSender in the
first place.

src/console/CommandReader.php

@@ -0,0 +1,80 @@
+<?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\console;
+
+use function fclose;
+use function fgets;
+use function fopen;
+use function is_resource;
+use function stream_select;
+use function trim;
+use function usleep;
+
+final class CommandReader{
+	/** @var resource */
+	private $stdin;
+
+	public function __construct(){
+		$this->initStdin();
+	}
+
+	private function initStdin() : void{
+		if(is_resource($this->stdin)){
+			fclose($this->stdin);
+		}
+
+		$this->stdin = fopen("php://stdin", "r");
+	}
+
+	/**
+	 * Reads a line from the console and adds it to the buffer. This method may block the thread.
+	 */
+	public function readLine() : ?string{
+		if(!is_resource($this->stdin)){
+			$this->initStdin();
+		}
+
+		$r = [$this->stdin];
+		$w = $e = null;
+		if(($count = stream_select($r, $w, $e, 0, 200000)) === 0){ //nothing changed in 200000 microseconds
+			return null;
+		}elseif($count === false){ //stream error
+			$this->initStdin();
+		}
+
+		if(($raw = fgets($this->stdin)) === false){ //broken pipe or EOF
+			$this->initStdin();
+			usleep(200000); //prevent CPU waste if it's end of pipe
+			return null; //loop back round
+		}
+
+		$line = trim($raw);
+
+		return $line !== "" ? $line : null;
+	}
+
+	public function __destruct(){
+		fclose($this->stdin);
+	}
+}

src/console/CommandReaderThread.php

@@ -0,0 +1,82 @@
+<?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\console;
+
+use pocketmine\snooze\SleeperNotifier;
+use pocketmine\thread\Thread;
+use pocketmine\thread\ThreadException;
+use function microtime;
+use function preg_replace;
+use function usleep;
+
+final class CommandReaderThread extends Thread{
+	private \Threaded $buffer;
+	private ?SleeperNotifier $notifier;
+
+	public bool $shutdown = false;
+
+	public function __construct(\Threaded $buffer, ?SleeperNotifier $notifier = null){
+		$this->buffer = $buffer;
+		$this->notifier = $notifier;
+	}
+
+	public function shutdown() : void{
+		$this->shutdown = true;
+	}
+
+	public function quit() : void{
+		$wait = microtime(true) + 0.5;
+		while(microtime(true) < $wait){
+			if($this->isRunning()){
+				usleep(100000);
+			}else{
+				parent::quit();
+				return;
+			}
+		}
+
+		throw new ThreadException("CommandReader is stuck in a blocking STDIN read");
+	}
+
+	protected function onRun() : void{
+		$buffer = $this->buffer;
+		$notifier = $this->notifier;
+
+		$reader = new CommandReader();
+		while(!$this->shutdown){
+			$line = $reader->readLine();
+
+			if($line !== null){
+				$buffer[] = preg_replace("#\\x1b\\x5b([^\\x1b]*\\x7e|[\\x40-\\x50])#", "", $line);
+				if($notifier !== null){
+					$notifier->wakeupSleeper();
+				}
+			}
+		}
+	}
+
+	public function getThreadName() : string{
+		return "Console";
+	}
+}

src/console/ConsoleCommandSender.php

@@ -0,0 +1,91 @@
+<?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\console;
+
+use pocketmine\command\CommandSender;
+use pocketmine\lang\Language;
+use pocketmine\lang\TranslationContainer;
+use pocketmine\permission\DefaultPermissions;
+use pocketmine\permission\PermissibleBase;
+use pocketmine\permission\PermissibleDelegateTrait;
+use pocketmine\Server;
+use function explode;
+use function trim;
+use const PHP_INT_MAX;
+
+class ConsoleCommandSender implements CommandSender{
+	use PermissibleDelegateTrait;
+
+	/** @var Server */
+	private $server;
+	/** @var int|null */
+	protected $lineHeight = null;
+	/** @var Language */
+	private $language;
+
+	public function __construct(Server $server, Language $language){
+		$this->server = $server;
+		$this->perm = new PermissibleBase([DefaultPermissions::ROOT_CONSOLE => true]);
+		$this->language = $language;
+	}
+
+	public function getServer() : Server{
+		return $this->server;
+	}
+
+	public function getLanguage() : Language{
+		return $this->language;
+	}
+
+	/**
+	 * @param TranslationContainer|string $message
+	 */
+	public function sendMessage($message) : void{
+		$server = $this->getServer();
+		if($message instanceof TranslationContainer){
+			$message = $this->getLanguage()->translate($message);
+		}else{
+			$message = $this->getLanguage()->translateString($message);
+		}
+
+		foreach(explode("\n", trim($message)) as $line){
+			$server->getLogger()->info($line);
+		}
+	}
+
+	public function getName() : string{
+		return "CONSOLE";
+	}
+
+	public function getScreenLineHeight() : int{
+		return $this->lineHeight ?? PHP_INT_MAX;
+	}
+
+	public function setScreenLineHeight(?int $height) : void{
+		if($height !== null and $height < 1){
+			throw new \InvalidArgumentException("Line height must be at least 1");
+		}
+		$this->lineHeight = $height;
+	}
+}