Added new events for network interface handling, close #1232 (#1250)

Added 
- NetworkInterfaceRegisterEvent (cancellable)
- NetworkInterfaceUnregisterEvent
- NetworkInterfaceCrashEvent

src/pocketmine/event/server/NetworkInterfaceCrashEvent.php

@@ -0,0 +1,50 @@
+<?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\event\server;
+
+use pocketmine\network\SourceInterface;
+
+/**
+ * Called when a network interface crashes, with relevant crash information.
+ */
+class NetworkInterfaceCrashEvent extends NetworkInterfaceEvent{
+	public static $handlerList = null;
+
+	/**
+	 * @var \Throwable
+	 */
+	private $exception;
+
+	public function __construct(SourceInterface $interface, \Throwable $throwable){
+		parent::__construct($interface);
+		$this->exception = $throwable;
+	}
+
+	/**
+	 * @return \Throwable
+	 */
+	public function getCrashInformation() : \Throwable{
+		return $this->exception;
+	}
+}

src/pocketmine/event/server/NetworkInterfaceEvent.php

@@ -0,0 +1,45 @@
+<?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\event\server;
+
+use pocketmine\network\SourceInterface;
+
+class NetworkInterfaceEvent extends ServerEvent{
+	/** @var SourceInterface */
+	protected $interface;
+
+	/**
+	 * @param SourceInterface $interface
+	 */
+	public function __construct(SourceInterface $interface){
+		$this->interface = $interface;
+	}
+
+	/**
+	 * @return SourceInterface
+	 */
+	public function getInterface() : SourceInterface{
+		return $this->interface;
+	}
+}

src/pocketmine/event/server/NetworkInterfaceRegisterEvent.php

@@ -0,0 +1,35 @@
+<?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\event\server;
+
+use pocketmine\event\Cancellable;
+use pocketmine\network\SourceInterface;
+
+/**
+ * Called when a network interface is registered into the network, for example the RakLib interface.
+ */
+class NetworkInterfaceRegisterEvent extends NetworkInterfaceEvent implements Cancellable{
+	public static $handlerList = null;
+
+}

src/pocketmine/event/server/NetworkInterfaceUnregisterEvent.php

@@ -0,0 +1,32 @@
+<?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\event\server;
+
+/**
+ * Called when a network interface is unregistered
+ */
+class NetworkInterfaceUnregisterEvent extends NetworkInterfaceEvent{
+	public static $handlerList = null;
+
+}