<?php
/**
 * PHP Server Monitor
 * Monitor your servers and websites.
 *
 * This file is part of PHP Server Monitor.
 * PHP Server Monitor is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PHP Server Monitor is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PHP Server Monitor.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @package     phpservermon
 * @author      Tim Zandbergen <Tim@Xervion.nl>
 * @copyright   Copyright (c) 2008-2018 Pepijn Over <pep@mailbox.org>
 * @license     http://www.gnu.org/licenses/gpl.txt GNU GPL v3
 * @version     Release: @package_version@
 * @link        http://www.phpservermonitor.org/
 **/

namespace psm\Txtmsg;

class Twilio extends Core {

	/**
	* Send sms using the Twilio API
	* https://www.twilio.com/docs/sms/api#send-an-sms-with-the-sms-api
	* @var string $message
	* @var array $this->recipients
	* @var string $recipient
	* @var string $this->username
	* @var string $this->password
	* @var string $this->originator
	* @var int $success
	* @var string $error
	* @return int or string
	*/
	public function sendSMS($message) {
		$success = 1;
		$error = '';

		foreach($this->recipients as $recipient) {
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_URL, "https://api.twilio.com/2010-04-01/Accounts/".$this->username."/Messages.json");
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_POSTFIELDS, "From=".urlencode($this->originator)."&Body=".urlencode($message)."&To=".urlencode($recipient));
			curl_setopt($ch, CURLOPT_POST, 1);
			curl_setopt($ch, CURLOPT_USERPWD, $this->username . ":" . $this->password);

			$headers = array();
			$headers[] = "Content-Type: application/x-www-form-urlencoded";
			curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

			$result = curl_exec($ch);
			curl_close($ch);

		 	// When the result string starts with {"code": there is a problem
			if (strpos($result, "{\"code\":") === 0) {
				$error = $result;
				$success = 0;
			}
		}
		if($success == 1){
			return 1;
		}
		return $error;
	}
}