<?php

include_once 'class.phpmailer.php';

include_once 'class.smtp.php';

include_once '../config.php';

include_once '../settings.php';

include_once '../utils.php';

class MailController {

    protected $default_params = array(

          'debug_level' => 1,

          'attachments' => array(),

      );

    function __construct() {

        //SMTP needs accurate times, and the PHP time zone MUST be set

        //This should be done in your php.ini, but this is how to do it if you don't have access to that

        date_default_timezone_set('Etc/UTC');

    }

    function isLocalRequest() {

        return $_SERVER['SERVER_ADDR'] == $_SERVER['REMOTE_ADDR']; 

    }

    public function run() {

        $method = $_SERVER['REQUEST_METHOD'];

        if ($method == "GET"){

          $this->doGet();

        } else if ($method == "POST") {

          $this->doPost();

        } else {

            error_log("request method '" . $method . "' is not supported");

        }

    }

    protected function doGet() {

    }

    // Example parameters: 

    // $params = array(

    //   'smtp_server' => 'smtp.qq.com',         //14.18.245.164

    //   'smtp_secure' => 'tls',                 //optional

    //   'smtp_port' => 465,                     //optional

    //   'smtp_user' => 'ivincentwang@qq.com',

    //   'smtp_pass' => "XXXXXXXXX",

    //   'from_addr' => 'ivincentwang@qq.com',

    //   'from_name' => 'Vincent Wang',

    //   'cc_addr' => 'vincent@easyio.com',      //optional

    //   'cc_name' => 'Vincent Wang',            //optional

    //   'to_addr' => 'linsong.qizi@gmail.com',

    //   'to_name' => 'Linsong Qizi',

    //   'subject' => 'PHPMailer GMail SMTP test',

    //   'content' => "hello test",

    //   'attachments' => array('composer.json', 'class.smtp.php') // optional

    // );

    // NOTE: if manul test in browser, need to comment out the local request

    // check below, otherwise, you will always be redirected

    protected function doPost() {

        if (!$this->isLocalRequest())

        {

            $url = "http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];

            header('Location: ' . $url, 302)

            die();

        }

        $params = array_merge($this->default_params, $_POST);

        //validate input

        $required_keys = array('smtp_server', 'from_addr', 'to_addr', 'subject');

        foreach($required_keys as $key) {

          if (empty($params[$key])) {

            die("ERROR : missing parameter '" . $key . "'");

          }

        }

        if (!empty($params['attachments'])) {

          $attachments = explode(',', $params['attachments']);

          $params['attachments'] = $attachments;

        }

        $to_addrs = explode(',', $params['to_addr']);

        $params['to_addr'] = $to_addrs;

        if (!empty($params['to_name']))

        {

          $to_names = explode(',', $params['to_name']);

          $params['to_name'] = $to_names;

        }

        if (!empty($params['cc_addr']))

        {

          $cc_addrs = explode(',', $params['cc_addr']);

          $params['cc_addr'] = $cc_addrs;

        }

        if (!empty($params['cc_name']))

        {

          $cc_names = explode(',', $params['cc_name']);

          $params['cc_name'] = $cc_names;

        }

        $this->sendMail($params);

        exit();

    }

    protected function setupTlsTunnel($mail) {

      $conf = new INIFile;

      if ($conf->load("/mnt/tls_tunnel/tls_tunnel.conf")) {

        $conf->setValue(NULL, 'remote_host', $mail->Host);

        $conf->setValue(NULL, 'remote_port', $mail->Port);

        $mail->Host = $conf->value(NULL, 'local_host', '127.0.0.1');

        $mail->Port = intval($conf->value(NULL, 'local_port', '3333'));

        $conf->save();

        $pid = rtrim(file_get_contents("/var/run/tls_tunnel.pid"));

        execCmd('kill -HUP ' . $pid)

      }

    }

    protected function sendMail($params) {

        //Create a new PHPMailer instance

        $mail = new PHPMailer;

        //Tell PHPMailer to use SMTP

        $mail->isSMTP();

        //Enable SMTP debugging

        // 0 = off (for production use)

        // 1 = client messages

        // 2 = client and server messages

        $mail->SMTPDebug = $params['debug_level'];

        //Enable auto TLS or not, by default disable it

        if (!empty($params['auto_tls']))

          $mail->SMTPAutoTLS = ($params['auto_tls'] == 'true' || $params['auto_tls'] == '1');

        else

          $mail->SMTPAutoTLS = false;

        //Ask for HTML-friendly debug output

        $mail->Debugoutput = 'html';

        //Set the hostname of the mail server

        $mail->Host = $params['smtp_server'];

        // use

        // $mail->Host = gethostbyname('smtp.gmail.com');

        // if your network does not support SMTP over IPv6

        //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission

        if (!empty($params['smtp_port']))

          $mail->Port = $params['smtp_port'];

        //Set the encryption system to use - ssl (deprecated) or tls

        if (!empty($params['smtp_secure']))

        {

          $this->setupTlsTunnel($mail);

          // never set SMTPSecure 

          // $mail->SMTPSecure = $params['smtp_secure'];

        }

        //Whether to use SMTP authentication

        $mail->SMTPAuth = !empty($params['smtp_user']) && !empty($params['smtp_pass']);

        //Username to use for SMTP authentication - use full email address for gmail

        $mail->Username = $params['smtp_user'];

        //Password to use for SMTP authentication

        $mail->Password = $params['smtp_pass'];

        //Set who the message is to be sent from

        $mail->setFrom($params['from_addr'], $params['from_name']);

        //Set cc data

        if (!empty($params['cc_addr'])) {

          foreach($params['cc_addr'] as $index => $addr)

            $mail->addCC($addr, arrayGet($params['cc_name'], $index, ''));

        }

        //Set an alternative reply-to address

        $mail->addReplyTo($params['from_addr'], $params['from_name']);

        //Set who the message is to be sent to

        foreach($params['to_addr'] as $index => $addr) {

          $mail->addAddress($addr, arrayGet($params['to_name'], $index, ''));

        }

        //Set the subject line

        $mail->Subject = $params['subject'];

        //Read an HTML message body from an external file, convert referenced images to embedded,

        //convert HTML into a basic plain-text alternative body

        //$mail->sgHTML(file_get_contents('contents.html'), dirname(__FILE__));

        $mail->sgHTML($params['content']);

        $mail->Body = preg_replace('/\r\n/', '<br>', $mail->Body);

        //Add Attachments

        foreach($params['attachments'] as $path) {

          $path = trim($path, "\r\n\t ");

          //check if the path is relative path

          if (!startsWith($path, '/')) {

            $rootPath = $_SERVER['DOCUMENT_ROOT'];

            $path = build_file_path($rootPath, $path);

          }

          if (!file_exists($path)) {

            echo 'file "' . $path . '" does not exist, skip it ' . "\n";

            continue;

          }

          $mail->addAttachment($path);

        }

        //send the message, check for errors

        if (!$mail->send()) {

            echo "ERROR : " . $mail->ErrorInfo;

            http_response_code(503);

        } else {

            echo "SUCCESS";

        }

    }

}

$controller = new MailController();

$controller->run();

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>

  <head>

    <eta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title><?php echo Config::$webPageTitle ?> Mail </title>

    <link rel="stylesheet" href="../../css/bootstrap.min.css" media="screen" />

  </head>

  <body>

    <div class="container">

      <div class="row">

        <div class="page-header"><h1>Mail SMTP Server Settings</h1></div>

        <div class="alert alert-info">

          <p>To send email by mail_controller, you need to send it a POST request from the <strong>*SAME*</strong> host.</p>

        </div>

        <h3>Gmail SMTP Setting:</h3>

        <dl class='dl-horizontal'>

          <dt>SMTP Server: </dt>

          <dd>smtp.gmail.com</dd>

          <dt>SMTP Port:</dt>

          <dd><strong>5</strong> (for secure, recommended)</dd>

          <dd> (for nonsecure)</dd>

        </dl>

        <div class="alert alert-info">

          <h4>NOTE</h4>

          If you can not send email successfully by Gmail SMTP server, there are two things you need to check: 

          <ul>

            <li>Make sure the option 'Access for less secure apps' has been turned on. <strong><a href="https://support.google.com/accounts/answer/6010255?hl=en">Here</a></strong> is how to change it.</li>

            <li>If you enabled 2-Step-Verification, then you will need to generate an App password and use it instead of your password. <strong><a href="https://support.google.com/accounts/answer/185833">Here</a></strong> is how to do it.</li>

          </ul>

        </div>

        <h3>Yahoo! Mail SMTP Setting:</h3>

        <dl class='dl-horizontal'>

          <dt>SMTP Server: </dt>

          <dd>smtp.mail.yahoo.com</dd>

          <dt>SMTP Port:</dt>

          <dd><strong>5</strong> (for secure, recommended)</dd>

          <dd> (for nonsecure)</dd>

        </dl>

        <div class="alert alert-info">

          <h4>NOTE</h4>

          If you can not send email successfully by Yahoo! mail SMTP server, there are two things you need to check: 

          <ul>

            <li>If you don't enable 2-Step-Verification, then make sure the option 'Allow apps that use less secure sign in' has been turned on. <strong><a href="https://help.yahoo.com/kb/account/SLN27791.html">Here</a> </strong> is how to do it.</li>

            <li>If you enabled 2-Step-Verification, then you will need to generate an App password and use it as 'smtp_pass' instead of your password. <strong><a href="https://help.yahoo.com/kb/SLN15241.html">Here</a></strong> is how to do it.</li>

          </ul>

        </div>

      </div>

    </div>

  </body>

</html>