Merge pull request #2 from MBoretto/master

Added Calc Whoami Command. Thanks to @MBoretto 

src/Commands/CalcCommand.php

+<?php
+/*
+ * This file is part of the TelegramBot package.
+ *
+ * (c) Avtandil Kikabidze aka LONGMAN <akalongman@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ * Written by Marco Boretto <marco.bore@gmail.com>
+ */
+namespace Longman\TelegramBot\Commands;
+
+use Longman\TelegramBot\Request;
+use Longman\TelegramBot\Command;
+use Longman\TelegramBot\Entities\Update;
+
+class CalcCommand extends Command
+{
+
+	public function execute() {
+		$update = $this->getUpdate();
+		$message = $this->getMessage();
+
+
+
+		$chat_id = $message->getChat()->getId();
+		$text = $message->getText(true);
+		
+		#$elm = explode(" ",$text);
+		#array_shift($elm);
+     
+	#	$text = trim(implode(" ",$elm));
+		$text = preg_replace('/[^0-9\+\-\*\/\(\) ]/i', '',trim($text));
+		$compute = create_function('', 'return (' . trim($text) . ');' );
+
+
+  		$data = array();
+  		$data['chat_id'] = $chat_id;
+  		$data['text'] = 0 + $compute();
+
+
+		$result = Request::sendMessage($data);
+
+	}
+
+
+}
+

src/Commands/WhoamiCommand.php

+<?php
+/*
+ * This file is part of the TelegramBot package.
+ *
+ * (c) Avtandil Kikabidze aka LONGMAN <akalongman@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ * writteno by Marco Boretto <marco.bore@gmail.com>
+ */
+
+namespace Longman\TelegramBot\Commands;
+
+use Longman\TelegramBot\Request;
+use Longman\TelegramBot\Command;
+use Longman\TelegramBot\Entities\Update;
+
+class WhoamiCommand extends Command
+{
+
+	public function execute() {
+		$update = $this->getUpdate();
+		$message = $this->getMessage();
+
+
+
+		$chat_id = $message->getChat()->getId();
+		$text = $message->getText(true);
+
+		$from = $message->getFrom()->getFirstName().' '.$message->getFrom()->getLastName().' '.$message->getFrom()->getUsername();
+
+  		$data = array();
+  		$data['chat_id'] = $chat_id;
+  		$data['text'] = 'Your name is: ' . $from;
+
+
+		$result = Request::sendMessage($data);
+
+	}
+
+
+}
+