<?php
////////////////////////////////////////////////////
// PHPMailer - PHP email class
//
// Class for sending email using either
// sendmail, PHP mail(), or SMTP.  Methods are
// based upon the standard AspEmail(tm) classes.
//
// Copyright (C) 2001 - 2003  Brent R. Matzelle
//
// License: LGPL, see LICENSE
////////////////////////////////////////////////////

/**
 * PHPMailer - PHP email transport class
 *
 * @package classes
 * @author Brent R. Matzelle
 * @copyright 2001 - 2003 Brent R. Matzelle
 * @version (within Zen Cart) $Id: class.phpmailer.php 14225 2009-08-24 01:04:37Z drbyte $
 * @version Modified for Zen Cart added protocols to enable use with Gmail 2007-09-30 Chuck Redman
 */
/**
 * PHPMailer - PHP email transport class
 *
 * @package classes
 */
class PHPMailer
{
  /////////////////////////////////////////////////
  // PUBLIC VARIABLES
  /////////////////////////////////////////////////

  /**
     * Email priority (1 = High, 3 = Normal, 5 = low).
     * @var int
     */
  var $Priority          = 3;

  /**
     * Sets the CharSet of the message.
     * @var string
     */
  var $CharSet           = "iso-8859-1";

  /**
     * Sets the Content-type of the message.
     * @var string
     */
  var $ContentType        = "text/plain";

  /**
     * Sets the Encoding of the message. Options for this are "8bit",
     * "7bit", "binary", "base64", and "quoted-printable".
     * @var string
     */
  var $Encoding          = "8bit";

  /**
     * Holds the most recent mailer error message.
     * @var string
     */
  var $ErrorInfo         = "";

  /**
     * Sets the From email address for the message.
     * @var string
     */
  var $From               = "root@localhost";

  /**
     * Sets the From name of the message.
     * @var string
     */
  var $FromName           = "Root User";

  /**
     * Sets the Sender email (Return-Path) of the message.  If not empty,
     * will be sent via -f to sendmail or as 'MAIL FROM' in smtp mode.
     * @var string
     */
  var $Sender            = "";

  /**
     * Sets the Subject of the message.
     * @var string
     */
  var $Subject           = "";

  /**
     * Sets the Body of the message.  This can be either an HTML or text body.
     * If HTML then run IsHTML(true).
     * @var string
     */
  var $Body               = "";

  /**
     * Sets the text-only body of the message.  This automatically sets the
     * email to multipart/alternative.  This body can be read by mail
     * clients that do not have HTML email capability such as mutt. Clients
     * that can read HTML will view the normal Body.
     * @var string
     */
  var $AltBody           = "";

  /**
     * Sets word wrapping on the body of the message to a given number of
     * characters.
     * @var int
     */
  var $WordWrap          = 0;

  /**
     * Method to send mail: ("mail", "sendmail", or "smtp").
     * @var string
     */
  var $Mailer            = "mail";

  /**
     * Sets the path of the sendmail program.
     * @var string
     */
  var $Sendmail          = "/usr/sbin/sendmail";

  /**
     * Path to PHPMailer plugins.  This is now only useful if the SMTP class
     * is in a different directory than the PHP include path.
     * @var string
     */
  var $PluginDir         = "";

  /**
     *  Holds PHPMailer version.
     *  @var string
     */
  var $Version           = "1.73";

  /**
     * Sets the email address that a reading confirmation will be sent.
     * @var string
     */
  var $ConfirmReadingTo  = "";

  /**
     *  Sets the hostname to use in Message-Id and Received headers
     *  and as default HELO string. If empty, the value returned
     *  by SERVER_NAME is used or 'localhost.localdomain'.
     *  @var string
     */
  var $Hostname          = "";

  /////////////////////////////////////////////////
  // SMTP VARIABLES
  /////////////////////////////////////////////////

  /**
     *  Sets the SMTP hosts.  All hosts must be separated by a
     *  semicolon.  You can also specify a different port
     *  for each host by using this format: [hostname:port]
     *  (e.g. "smtp1.example.com:25;smtp2.example.com").
     *  Hosts will be tried in order.
     *  @var string
     */
  var $Host        = "localhost";

  /**
     *  Sets the default SMTP server port.
     *  @var int
     */
  var $Port        = 25;

  /**
   *  Sets the SMTP server socket protocol.
   *  @var string
   *  Added for Gmail support CER.
   */
  var $Protocol = '';

  /**
     *  Sets the SMTP HELO of the message (Default is $Hostname).
     *  @var string
     */
  var $Helo        = "";

  /**
     *  Sets SMTP authentication. Utilizes the Username and Password variables.
     *  @var bool
     */
  var $SMTPAuth     = false;

  /**
     *  Sets SMTP username.
     *  @var string
     */
  var $Username     = "";

  /**
     *  Sets SMTP password.
     *  @var string
     */
  var $Password     = "";

  /**
     *  Sets the SMTP server timeout in seconds. This function will not
     *  work with the win32 version.
     *  @var int
     */
  var $Timeout      = 10;

  /**
     *  Sets SMTP class debugging on or off.
     *  @var bool
     */
  var $SMTPDebug    = false;

  /**
     * Prevents the SMTP connection from being closed after each mail
     * sending.  If this is set to true then to close the connection
     * requires an explicit call to SmtpClose().
     * @var bool
     */
  var $SMTPKeepAlive = false;

  /**#@+
  * @access private
  */
  var $smtp            = NULL;
  var $to              = array();
  var $cc              = array();
  var $bcc             = array();
  var $ReplyTo         = array();
  var $attachment      = array();
  var $CustomHeader    = array();
  var $message_type    = "";
  var $boundary        = array();
  var $language        = array();
  var $error_count     = 0;
  var $LE              = "\n";
  /**#@-*/

  /////////////////////////////////////////////////
  // VARIABLE METHODS
  /////////////////////////////////////////////////

  /**
     * Sets message type to HTML.
     * @param bool $bool
     * @return void
     */
  function IsHTML($bool) {
    if($bool == true)
    $this->ContentType = "text/html";
    else
    $this->ContentType = "text/plain";
  }

  /**
     * Sets Mailer to send message using SMTP.
     * @return void
     */
  function IsSMTP() {
    $this->Mailer = "smtp";
  }

  /**
     * Sets Mailer to send message using PHP mail() function.
     * @return void
     */
  function IsMail() {
    $this->Mailer = "mail";
  }

  /**
     * Sets Mailer to send message using the $Sendmail program.
     * @return void
     */
  function IsSendmail() {
    $this->Mailer = "sendmail";
  }

  /**
     * Sets Mailer to send message using the qmail MTA.
     * @return void
     */
  function IsQmail() {
    $this->Sendmail = "/var/qmail/bin/sendmail";
    $this->Mailer = "sendmail";
  }


  /////////////////////////////////////////////////
  // RECIPIENT METHODS
  /////////////////////////////////////////////////

  /**
     * Adds a "To" address.
     * @param string $address
     * @param string $name
     * @return void
     */
  function AddAddress($address, $name = "") {
    $cur = count($this->to);
    $this->to[$cur][0] = trim($address);
    $this->to[$cur][1] = $name;
  }

  /**
     * Adds a "Cc" address. Note: this function works
     * with the SMTP mailer on win32, not with the "mail"
     * mailer.
     * @param string $address
     * @param string $name
     * @return void
    */
  function AddCC($address, $name = "") {
    $cur = count($this->cc);
    $this->cc[$cur][0] = trim($address);
    $this->cc[$cur][1] = $name;
  }

  /**
     * Adds a "Bcc" address. Note: this function works
     * with the SMTP mailer on win32, not with the "mail"
     * mailer.
     * @param string $address
     * @param string $name
     * @return void
     */
  function AddBCC($address, $name = "") {
    $cur = count($this->bcc);
    $this->bcc[$cur][0] = trim($address);
    $this->bcc[$cur][1] = $name;
  }

  /**
     * Adds a "Reply-to" address.
     * @param string $address
     * @param string $name
     * @return void
     */
  function AddReplyTo($address, $name = "") {
    $cur = count($this->ReplyTo);
    $this->ReplyTo[$cur][0] = trim($address);
    $this->ReplyTo[$cur][1] = $name;
  }


  /////////////////////////////////////////////////
  // MAIL SENDING METHODS
  /////////////////////////////////////////////////

  /**
     * Creates message and assigns Mailer. If the message is
     * not sent successfully then it returns false.  Use the ErrorInfo
     * variable to view description of the error.
     * @return bool
     */
  function Send() {
    $header = "";
    $body = "";
    $result = true;

    if((count($this->to) + count($this->cc) + count($this->bcc)) < 1)
    {
      $this->SetError($this->Lang("provide_address"));
      return false;
    }

    // Set whether the message is multipart/alternative
    if(!empty($this->AltBody))
    $this->ContentType = "multipart/alternative";

    $this->error_count = 0; // reset errors
    $this->SetMessageType();
    $header .= $this->CreateHeader();
    $body = $this->CreateBody();

    if($body == "") { return false; }

    // Choose the mailer
    switch($this->Mailer)
    {
      case "sendmail":
      $result = $this->SendmailSend($header, $body);
      break;
      case "mail":
      $result = $this->MailSend($header, $body);
      break;
      case "smtp":
      $result = $this->SmtpSend($header, $body);
      break;
      default:
      $this->SetError($this->Mailer . $this->Lang("mailer_not_supported"));
      $result = false;
      break;
    }

    return $result;
  }

  /**
     * Sends mail using the $Sendmail program.
     * @access private
     * @return bool
     */
  function SendmailSend($header, $body) {
    if ($this->Sender != "")
    $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
    else
    $sendmail = sprintf("%s -oi -t", escapeshellcmd($this->Sendmail));

    if(!@$mail = popen($sendmail, "w"))
    {
      $this->SetError($this->Lang("execute") . $this->Sendmail);
      return false;
    }

    fputs($mail, $header);
    fputs($mail, $body);

    $result = pclose($mail) >> 8 & 0xFF;
    if($result != 0)
    {
      $this->SetError($this->Lang("execute") . $this->Sendmail);
      return false;
    }

    return true;
  }

  /**
     * Sends mail using the PHP mail() function.
     * @access private
     * @return bool
     */
  function MailSend($header, $body) {
    $to = "";
    for($i = 0; $i < count($this->to); $i++)
    {
      if($i != 0) { $to .= ", "; }
      $to .= $this->to[$i][0];
    }

    if ($this->Sender != "" && strlen(ini_get("safe_mode"))< 1)
    {
      $old_from = ini_get("sendmail_from");
      ini_set("sendmail_from", $this->Sender);
      $params = sprintf("-oi -f %s", $this->Sender);
      $rt = @mail($to, $this->EncodeHeader($this->Subject), $body,
      $header, $params);
    }
    else
    $rt = @mail($to, $this->EncodeHeader($this->Subject), $body, $header);

    if (isset($old_from))
    ini_set("sendmail_from", $old_from);

    if(!$rt)
    {
      $this->SetError($this->Lang("instantiate"));
      return false;
    }

    return true;
  }

  /**
     * Sends mail via SMTP using PhpSMTP (Author:
     * Chris Ryan).  Returns bool.  Returns false if there is a
     * bad MAIL FROM, RCPT, or DATA input.
     * @access private
     * @return bool
     */
  function SmtpSend($header, $body) {
    include_once($this->PluginDir . "class.smtp.php");
    $error = "";
    $bad_rcpt = array();

    if(!$this->SmtpConnect())
    return false;

    $smtp_from = ($this->Sender == "") ? $this->From : $this->Sender;
    if(!$this->smtp->Mail($smtp_from))
    {
      $error = $this->Lang("from_failed") . $smtp_from;
      $this->SetError($error);
      $this->smtp->Reset();
      return false;
    }

    // Attempt to send attach all recipients
    for($i = 0; $i < count($this->to); $i++)
    {
      if(!$this->smtp->Recipient($this->to[$i][0]))
      $bad_rcpt[] = $this->to[$i][0];
    }
    for($i = 0; $i < count($this->cc); $i++)
    {
      if(!$this->smtp->Recipient($this->cc[$i][0]))
      $bad_rcpt[] = $this->cc[$i][0];
    }
    for($i = 0; $i < count($this->bcc); $i++)
    {
      if(!$this->smtp->Recipient($this->bcc[$i][0]))
      $bad_rcpt[] = $this->bcc[$i][0];
    }

    if(count($bad_rcpt) > 0) // Create error message
    {
      for($i = 0; $i < count($bad_rcpt); $i++)
      {
        if($i != 0) { $error .= ", "; }
        $error .= $bad_rcpt[$i];
      }
      $error = $this->Lang("recipients_failed") . $error;
      $this->SetError($error);
      $this->smtp->Reset();
      return false;
    }

    if(!$this->smtp->Data($header . $body))
    {
      $this->SetError($this->Lang("data_not_accepted"));
      $this->smtp->Reset();
      return false;
    }
    if($this->SMTPKeepAlive == true)
    $this->smtp->Reset();
    else
    $this->SmtpClose();

    return true;
  }

  /**
     * Initiates a connection to an SMTP server.  Returns false if the
     * operation failed.
     * @access private
     * @return bool
     */
  function SmtpConnect() {
    if($this->smtp == NULL) { $this->smtp = new SMTP(); }

    //Added for Gmail support CER
    $this->smtp->Protocol = $this->Protocol;

    $this->smtp->do_debug = $this->SMTPDebug;
    $hosts = explode(";", $this->Host);
    $index = 0;
    $connection = ($this->smtp->Connected());

    // Retry while there is no connection
    while($index < count($hosts) && $connection == false)
    {
      if(strstr($hosts[$index], ":"))
      list($host, $port) = explode(":", $hosts[$index]);
      else
      {
        $host = $hosts[$index];
        $port = $this->Port;
      }

      if($this->smtp->Connect($host, $port, $this->Timeout))
      {
        if ($this->Helo != '')
        $this->smtp->Hello($this->Helo);
        else
        $this->smtp->Hello($this->ServerHostname());

        if($this->SMTPAuth)
        {
          if(!$this->smtp->Authenticate($this->Username,
          $this->Password))
          {
            $this->SetError($this->Lang("authenticate"));
            $this->smtp->Reset();
            $connection = false;
          }
        }
        $connection = true;
      }
      $index++;
    }
    if(!$connection)
    $this->SetError($this->Lang("connect_host"));

    return $connection;
  }

  /**
     * Closes the active SMTP session if one exists.
     * @return void
     */
  function SmtpClose() {
    if($this->smtp != NULL)
    {
      if($this->smtp->Connected())
      {
        $this->smtp->Quit();
        $this->smtp->Close();
      }
    }
  }

  /**
     * Sets the language for all class error messages.  Returns false
     * if it cannot load the language file.  The default language type
     * is English.
     * @param string $lang_type Type of language (e.g. Portuguese: "br")
     * @param string $lang_path Path to the language file directory
     * @access public
     * @return bool
     */
  function SetLanguage($lang_type, $lang_path = "support/") {
    if(file_exists($lang_path.'phpmailer.lang-'.$lang_type.'.php'))
    include($lang_path.'phpmailer.lang-'.$lang_type.'.php');
    else if(file_exists($lang_path.'phpmailer.lang-en.php'))
    include($lang_path.'phpmailer.lang-en.php');
    else
    {
      $this->SetError("Could not load language file");
      return false;
    }
    $this->language = $PHPMAILER_LANG;

    return true;
  }

  /////////////////////////////////////////////////
  // MESSAGE CREATION METHODS
  /////////////////////////////////////////////////

  /**
     * Creates recipient headers.
     * @access private
     * @return string
     */
  function AddrAppend($type, $addr) {
    $addr_str = $type . ": ";
    $addr_str .= $this->AddrFormat($addr[0]);
    if(count($addr) > 1)
    {
      for($i = 1; $i < count($addr); $i++)
      $addr_str .= ", " . $this->AddrFormat($addr[$i]);
    }
    $addr_str .= $this->LE;

    return $addr_str;
  }

  /**
     * Formats an address correctly.
     * @access private
     * @return string
     */
  function AddrFormat($addr) {
    if(empty($addr[1]))
    $formatted = $addr[0];
    else
    {
      $formatted = $this->EncodeHeader($addr[1], 'phrase') . " <" .
      $addr[0] . ">";
    }

    return $formatted;
  }

  /**
     * Wraps message for use with mailers that do not
     * automatically perform wrapping and for quoted-printable.
     * Original written by philippe.
     * @access private
     * @return string
     */
  function WrapText($message, $length, $qp_mode = false) {
    $soft_break = ($qp_mode) ? sprintf(" =%s", $this->LE) : $this->LE;

    $message = $this->FixEOL($message);
    if (substr($message, -1) == $this->LE)
    $message = substr($message, 0, -1);

    $line = explode($this->LE, $message);
    $message = "";
    for ($i=0 ;$i < count($line); $i++)
    {
      $line_part = explode(" ", $line[$i]);
      $buf = "";
      for ($e = 0; $e<count($line_part); $e++)
      {
        $word = $line_part[$e];
        if ($qp_mode and (strlen($word) > $length))
        {
          $space_left = $length - strlen($buf) - 1;
          if ($e != 0)
          {
            if ($space_left > 20)
            {
              $len = $space_left;
              if (substr($word, $len - 1, 1) == "=")
              $len--;
              elseif (substr($word, $len - 2, 1) == "=")
              $len -= 2;
              $part = substr($word, 0, $len);
              $word = substr($word, $len);
              $buf .= " " . $part;
              $message .= $buf . sprintf("=%s", $this->LE);
            }
            else
            {
              $message .= $buf . $soft_break;
            }
            $buf = "";
          }
          while (strlen($word) > 0)
          {
            $len = $length;
            if (substr($word, $len - 1, 1) == "=")
            $len--;
            elseif (substr($word, $len - 2, 1) == "=")
            $len -= 2;
            $part = substr($word, 0, $len);
            $word = substr($word, $len);

            if (strlen($word) > 0)
            $message .= $part . sprintf("=%s", $this->LE);
            else
            $buf = $part;
          }
        }
        else
        {
          $buf_o = $buf;
          $buf .= ($e == 0) ? $word : (" " . $word);

          if (strlen($buf) > $length and $buf_o != "")
          {
            $message .= $buf_o . $soft_break;
            $buf = $word;
          }
        }
      }
      $message .= $buf . $this->LE;
    }

    return $message;
  }

  /**
     * Set the body wrapping.
     * @access private
     * @return void
     */
  function SetWordWrap() {
    if($this->WordWrap < 1)
    return;

    switch($this->message_type)
    {
      case "alt":
      // fall through
      case "alt_attachments":
      $this->AltBody = $this->WrapText($this->AltBody, $this->WordWrap);
      break;
      default:
      $this->Body = $this->WrapText($this->Body, $this->WordWrap);
      break;
    }
  }

  /**
     * Assembles message header.
     * @access private
     * @return string
     */
  function CreateHeader() {
    $result = "";

    // Set the boundaries
    $uniq_id = md5(uniqid(time()));
    $this->boundary[1] = "b1_" . $uniq_id;
    $this->boundary[2] = "b2_" . $uniq_id;

    $result .= $this->HeaderLine("Date", $this->RFCDate());
    if($this->Sender == "")
    $result .= $this->HeaderLine("Return-Path", trim($this->From));
    else
    $result .= $this->HeaderLine("Return-Path", trim($this->Sender));

    // To be created automatically by mail()
    if($this->Mailer != "mail")
    {
      if(count($this->to) > 0)
      $result .= $this->AddrAppend("To", $this->to);
      else if (count($this->cc) == 0)
      $result .= $this->HeaderLine("To", "undisclosed-recipients:;");
      if(count($this->cc) > 0)
      $result .= $this->AddrAppend("Cc", $this->cc);
    }

    $from = array();
    $from[0][0] = trim($this->From);
    $from[0][1] = $this->FromName;
    $result .= $this->AddrAppend("From", $from);

    // sendmail and mail() extract Bcc from the header before sending
    if((($this->Mailer == "sendmail") || ($this->Mailer == "mail")) && (count($this->bcc) > 0))
    $result .= $this->AddrAppend("Bcc", $this->bcc);

    if(count($this->ReplyTo) > 0)
    $result .= $this->AddrAppend("Reply-to", $this->ReplyTo);

    // mail() sets the subject itself
    if($this->Mailer != "mail")
    $result .= $this->HeaderLine("Subject", $this->EncodeHeader(trim($this->Subject)));

    $result .= sprintf("Message-ID: <%s@%s>%s", $uniq_id, $this->ServerHostname(), $this->LE);
    $result .= $this->HeaderLine("X-Priority", $this->Priority);
    $result .= $this->HeaderLine("X-Mailer", "PHPMailer [version " . $this->Version . "] via Zen Cart");

    if($this->ConfirmReadingTo != "")
    {
      $result .= $this->HeaderLine("Disposition-Notification-To",
      "<" . trim($this->ConfirmReadingTo) . ">");
    }

    // Add custom headers
    for($index = 0; $index < count($this->CustomHeader); $index++)
    {
      $result .= $this->HeaderLine(trim($this->CustomHeader[$index][0]),
      $this->EncodeHeader(trim($this->CustomHeader[$index][1])));
    }
    $result .= $this->HeaderLine("MIME-Version", "1.0");

    switch($this->message_type)
    {
      case "plain":
      $result .= $this->HeaderLine("Content-Transfer-Encoding", $this->Encoding);
      $result .= sprintf("Content-Type: %s; charset=\"%s\"",
      $this->ContentType, $this->CharSet);
      break;
      case "attachments":
      // fall through
      case "alt_attachments":
      if($this->InlineImageExists())
      {
        $result .= sprintf("Content-Type: %s;%s\ttype=\"text/html\";%s\tboundary=\"%s\"%s",
        "multipart/related", $this->LE, $this->LE,
        $this->boundary[1], $this->LE);
      }
      else
      {
        $result .= $this->HeaderLine("Content-Type", "multipart/mixed;");
        $result .= $this->TextLine("\tboundary=\"" . $this->boundary[1] . '"');
      }
      break;
      case "alt":
      $result .= $this->HeaderLine("Content-Type", "multipart/alternative;");
      $result .= $this->TextLine("\tboundary=\"" . $this->boundary[1] . '"');
      break;
    }

    if($this->Mailer != "mail")
    $result .= $this->LE.$this->LE;

    return $result;
  }

  /**
     * Assembles the message body.  Returns an empty string on failure.
     * @access private
     * @return string
     */
  function CreateBody() {
    $result = "";

    $this->SetWordWrap();

    switch($this->message_type)
    {
      case "alt":
      $result .= $this->GetBoundary($this->boundary[1], "",
      "text/plain", "");
      $result .= $this->EncodeString($this->AltBody, $this->Encoding);
      $result .= $this->LE.$this->LE;
      $result .= $this->GetBoundary($this->boundary[1], "",
      "text/html", "");

      $result .= $this->EncodeString($this->Body, $this->Encoding);
      $result .= $this->LE.$this->LE;

      $result .= $this->EndBoundary($this->boundary[1]);
      break;
      case "plain":
      $result .= $this->EncodeString($this->Body, $this->Encoding);
      break;
      case "attachments":
      $result .= $this->GetBoundary($this->boundary[1], "", "", "");
      $result .= $this->EncodeString($this->Body, $this->Encoding);
      $result .= $this->LE;

      $result .= $this->AttachAll();
      break;
      case "alt_attachments":
      $result .= sprintf("--%s%s", $this->boundary[1], $this->LE);
      $result .= sprintf("Content-Type: %s;%s" .
      "\tboundary=\"%s\"%s",
      "multipart/alternative", $this->LE,
      $this->boundary[2], $this->LE.$this->LE);

      // Create text body
      $result .= $this->GetBoundary($this->boundary[2], "",
      "text/plain", "") . $this->LE;

      $result .= $this->EncodeString($this->AltBody, $this->Encoding);
      $result .= $this->LE.$this->LE;

      // Create the HTML body
      $result .= $this->GetBoundary($this->boundary[2], "",
      "text/html", "") . $this->LE;

      $result .= $this->EncodeString($this->Body, $this->Encoding);
      $result .= $this->LE.$this->LE;

      $result .= $this->EndBoundary($this->boundary[2]);

      $result .= $this->AttachAll();
      break;
    }
    if($this->IsError())
    $result = "";

    return $result;
  }

  /**
     * Returns the start of a message boundary.
     * @access private
     */
  function GetBoundary($boundary, $charSet, $contentType, $encoding) {
    $result = "";
    if($charSet == "") { $charSet = $this->CharSet; }
    if($contentType == "") { $contentType = $this->ContentType; }
    if($encoding == "") { $encoding = $this->Encoding; }

    $result .= $this->TextLine("--" . $boundary);
    $result .= sprintf("Content-Type: %s; charset = \"%s\"",
    $contentType, $charSet);
    $result .= $this->LE;
    $result .= $this->HeaderLine("Content-Transfer-Encoding", $encoding);
    $result .= $this->LE;

    return $result;
  }

  /**
     * Returns the end of a message boundary.
     * @access private
     */
  function EndBoundary($boundary) {
    return $this->LE . "--" . $boundary . "--" . $this->LE;
  }

  /**
     * Sets the message type.
     * @access private
     * @return void
     */
  function SetMessageType() {
    if(count($this->attachment) < 1 && strlen($this->AltBody) < 1)
    $this->message_type = "plain";
    else
    {
      if(count($this->attachment) > 0)
      $this->message_type = "attachments";
      if(strlen($this->AltBody) > 0 && count($this->attachment) < 1)
      $this->message_type = "alt";
      if(strlen($this->AltBody) > 0 && count($this->attachment) > 0)
      $this->message_type = "alt_attachments";
    }
  }

  /**
     * Returns a formatted header line.
     * @access private
     * @return string
     */
  function HeaderLine($name, $value) {
    return $name . ": " . $value . $this->LE;
  }

  /**
     * Returns a formatted mail line.
     * @access private
     * @return string
     */
  function TextLine($value) {
    return $value . $this->LE;
  }

  /////////////////////////////////////////////////
  // ATTACHMENT METHODS
  /////////////////////////////////////////////////

  /**
     * Adds an attachment from a path on the filesystem.
     * Returns false if the file could not be found
     * or accessed.
     * @param string $path Path to the attachment.
     * @param string $name Overrides the attachment name.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File extension (MIME) type.
     * @return bool
     */
  function AddAttachment($path, $name = "", $encoding = "base64",
  $type = "application/octet-stream") {
    if(!@is_file($path))
    {
      $this->SetError($this->Lang("file_access") . $path);
      return false;
    }

    $filename = basename($path);
    if($name == "")
    $name = $filename;

    $cur = count($this->attachment);
    $this->attachment[$cur][0] = $path;
    $this->attachment[$cur][1] = $filename;
    $this->attachment[$cur][2] = $name;
    $this->attachment[$cur][3] = $encoding;
    $this->attachment[$cur][4] = $type;
    $this->attachment[$cur][5] = false; // isStringAttachment
    $this->attachment[$cur][6] = "attachment";
    $this->attachment[$cur][7] = 0;

    return true;
  }

  /**
     * Attaches all fs, string, and binary attachments to the message.
     * Returns an empty string on failure.
     * @access private
     * @return string
     */
  function AttachAll() {
    // Return text of body
    $mime = array();

    // Add all attachments
    for($i = 0; $i < count($this->attachment); $i++)
    {
      // Check for string attachment
      $bString = $this->attachment[$i][5];
      if ($bString)
      $string = $this->attachment[$i][0];
      else
      $path = $this->attachment[$i][0];

      $filename    = $this->attachment[$i][1];
      $name        = $this->attachment[$i][2];
      $encoding    = $this->attachment[$i][3];
      $type        = $this->attachment[$i][4];
      $disposition = $this->attachment[$i][6];
      $cid         = $this->attachment[$i][7];

      $mime[] = sprintf("--%s%s", $this->boundary[1], $this->LE);
      $mime[] = sprintf("Content-Type: %s; name=\"%s\"%s", $type, $name, $this->LE);
      $mime[] = sprintf("Content-Transfer-Encoding: %s%s", $encoding, $this->LE);

      if($disposition == "inline")
      $mime[] = sprintf("Content-ID: <%s>%s", $cid, $this->LE);

      $mime[] = sprintf("Content-Disposition: %s; filename=\"%s\"%s",
      $disposition, $name, $this->LE.$this->LE);

      // Encode as string attachment
      if($bString)
      {
        $mime[] = $this->EncodeString($string, $encoding);
        if($this->IsError()) { return ""; }
        $mime[] = $this->LE.$this->LE;
      }
      else
      {
        $mime[] = $this->EncodeFile($path, $encoding);
        if($this->IsError()) { return ""; }
        $mime[] = $this->LE.$this->LE;
      }
    }

    $mime[] = sprintf("--%s--%s", $this->boundary[1], $this->LE);

    return join("", $mime);
  }

  /**
     * Encodes attachment in requested format.  Returns an
     * empty string on failure.
     * @access private
     * @return string
     */
  function EncodeFile ($path, $encoding = "base64") {
    if(!@$fd = fopen($path, "rb"))
    {
      $this->SetError($this->Lang("file_open") . $path);
      return "";
    }
    $magic_quotes = get_magic_quotes_runtime();
    if (function_exists('set_magic_quotes_runtime')) set_magic_quotes_runtime(0);
    $file_buffer = fread($fd, filesize($path));
    $file_buffer = $this->EncodeString($file_buffer, $encoding);
    fclose($fd);
    if (function_exists('set_magic_quotes_runtime')) @set_magic_quotes_runtime($magic_quotes);
    return $file_buffer;
  }

  /**
     * Encodes string to requested format. Returns an
     * empty string on failure.
     * @access private
     * @return string
     */
  function EncodeString ($str, $encoding = "base64") {
    $encoded = "";
    switch(strtolower($encoding)) {
      case "base64":
      // chunk_split is found in PHP >= 3.0.6
      $encoded = chunk_split(base64_encode($str), 76, $this->LE);
      break;
      case "7bit":
      case "8bit":
      $encoded = $this->FixEOL($str);
      if (substr($encoded, -(strlen($this->LE))) != $this->LE)
      $encoded .= $this->LE;
      break;
      case "binary":
      $encoded = $str;
      break;
      case "quoted-printable":
      $encoded = $this->EncodeQP($str);
      break;
      default:
      $this->SetError($this->Lang("encoding") . $encoding);
      break;
    }
    return $encoded;
  }

  /**
     * Encode a header string to best of Q, B, quoted or none.
     * @access private
     * @return string
     */
  function EncodeHeader ($str, $position = 'text') {
    $x = 0;

    switch (strtolower($position)) {
      case 'phrase':
      if (!preg_match('/[\200-\377]/', $str)) {
        // Can't use addslashes as we don't know what value has magic_quotes_sybase.
        $encoded = addcslashes($str, "\0..\37\177\\\"");

        if (($str == $encoded) && !preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str))
        return ($encoded);
        else
        return ("\"$encoded\"");
      }
      $x = preg_match_all('/[^\040\041\043-\133\135-\176]/', $str, $matches);
      break;
      case 'comment':
      $x = preg_match_all('/[()"]/', $str, $matches);
      // Fall-through
      case 'text':
      default:
      $x += preg_match_all('/[\000-\010\013\014\016-\037\177-\377]/', $str, $matches);
      break;
    }

    if ($x == 0)
    return ($str);

    $maxlen = 75 - 7 - strlen($this->CharSet);
    // Try to select the encoding which should produce the shortest output
    if (strlen($str)/3 < $x) {
      $encoding = 'B';
      $encoded = base64_encode($str);
      $maxlen -= $maxlen % 4;
      $encoded = trim(chunk_split($encoded, $maxlen, "\n"));
    } else {
      $encoding = 'Q';
      $encoded = $this->EncodeQ($str, $position);
      $encoded = $this->WrapText($encoded, $maxlen, true);
      $encoded = str_replace("=".$this->LE, "\n", trim($encoded));
    }

    $encoded = preg_replace('/^(.*)$/m', " =?".$this->CharSet."?$encoding?\\1?=", $encoded);
    $encoded = trim(str_replace("\n", $this->LE, $encoded));

    return $encoded;
  }

  /**
     * Encode string to quoted-printable.
     * @access private
     * @return string
     */
  function EncodeQP ($str) {
    $encoded = $this->FixEOL($str);
    if (substr($encoded, -(strlen($this->LE))) != $this->LE)
    $encoded .= $this->LE;

    // Replace every high ascii, control and = characters
    $encoded = preg_replace('/([\000-\010\013\014\016-\037\075\177-\377])/e',
    "'='.sprintf('%02X', ord('\\1'))", $encoded);
    // Replace every spaces and tabs when it's the last character on a line
    $encoded = preg_replace("/([\011\040])".$this->LE."/e",
    "'='.sprintf('%02X', ord('\\1')).'".$this->LE."'", $encoded);

    // Maximum line length of 76 characters before CRLF (74 + space + '=')
    $encoded = $this->WrapText($encoded, 74, true);

    return $encoded;
  }

  /**
     * Encode string to q encoding.
     * @access private
     * @return string
     */
  function EncodeQ ($str, $position = "text") {
    // There should not be any EOL in the string
    $encoded = preg_replace("[\r\n]", "", $str);

    switch (strtolower($position)) {
      case "phrase":
      $encoded = preg_replace("/([^A-Za-z0-9!*+\/ -])/e", "'='.sprintf('%02X', ord('\\1'))", $encoded);
      break;
      case "comment":
      $encoded = preg_replace("/([\(\)\"])/e", "'='.sprintf('%02X', ord('\\1'))", $encoded);
      case "text":
      default:
      // Replace every high ascii, control =, ? and _ characters
      $encoded = preg_replace('/([\000-\011\013\014\016-\037\075\077\137\177-\377])/e',
      "'='.sprintf('%02X', ord('\\1'))", $encoded);
      break;
    }

    // Replace every spaces to _ (more readable than =20)
    $encoded = str_replace(" ", "_", $encoded);

    return $encoded;
  }

  /**
     * Adds a string or binary attachment (non-filesystem) to the list.
     * This method can be used to attach ascii or binary data,
     * such as a BLOB record from a database.
     * @param string $string String attachment data.
     * @param string $filename Name of the attachment.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File extension (MIME) type.
     * @return void
     */
  function AddStringAttachment($string, $filename, $encoding = "base64",
  $type = "application/octet-stream") {
    // Append to $attachment array
    $cur = count($this->attachment);
    $this->attachment[$cur][0] = $string;
    $this->attachment[$cur][1] = $filename;
    $this->attachment[$cur][2] = $filename;
    $this->attachment[$cur][3] = $encoding;
    $this->attachment[$cur][4] = $type;
    $this->attachment[$cur][5] = true; // isString
    $this->attachment[$cur][6] = "attachment";
    $this->attachment[$cur][7] = 0;
  }

  /**
     * Adds an embedded attachment.  This can include images, sounds, and
     * just about any other document.  Make sure to set the $type to an
     * image type.  For JPEG images use "image/jpeg" and for GIF images
     * use "image/gif".
     * @param string $path Path to the attachment.
     * @param string $cid Content ID of the attachment.  Use this to identify
     *        the Id for accessing the image in an HTML form.
     * @param string $name Overrides the attachment name.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File extension (MIME) type.
     * @return bool
     */
  function AddEmbeddedImage($path, $cid, $name = "", $encoding = "base64",
  $type = "application/octet-stream") {

    if(!@is_file($path))
    {
      $this->SetError($this->Lang("file_access") . $path);
      return false;
    }

    $filename = basename($path);
    if($name == "")
    $name = $filename;

    // Append to $attachment array
    $cur = count($this->attachment);
    $this->attachment[$cur][0] = $path;
    $this->attachment[$cur][1] = $filename;
    $this->attachment[$cur][2] = $name;
    $this->attachment[$cur][3] = $encoding;
    $this->attachment[$cur][4] = $type;
    $this->attachment[$cur][5] = false; // isStringAttachment
    $this->attachment[$cur][6] = "inline";
    $this->attachment[$cur][7] = $cid;

    return true;
  }

  /**
     * Returns true if an inline attachment is present.
     * @access private
     * @return bool
     */
  function InlineImageExists() {
    $result = false;
    for($i = 0; $i < count($this->attachment); $i++)
    {
      if($this->attachment[$i][6] == "inline")
      {
        $result = true;
        break;
      }
    }

    return $result;
  }

  /////////////////////////////////////////////////
  // MESSAGE RESET METHODS
  /////////////////////////////////////////////////

  /**
     * Clears all recipients assigned in the TO array.  Returns void.
     * @return void
     */
  function ClearAddresses() {
    $this->to = array();
  }

  /**
     * Clears all recipients assigned in the CC array.  Returns void.
     * @return void
     */
  function ClearCCs() {
    $this->cc = array();
  }

  /**
     * Clears all recipients assigned in the BCC array.  Returns void.
     * @return void
     */
  function ClearBCCs() {
    $this->bcc = array();
  }

  /**
     * Clears all recipients assigned in the ReplyTo array.  Returns void.
     * @return void
     */
  function ClearReplyTos() {
    $this->ReplyTo = array();
  }

  /**
     * Clears all recipients assigned in the TO, CC and BCC
     * array.  Returns void.
     * @return void
     */
  function ClearAllRecipients() {
    $this->to = array();
    $this->cc = array();
    $this->bcc = array();
  }

  /**
     * Clears all previously set filesystem, string, and binary
     * attachments.  Returns void.
     * @return void
     */
  function ClearAttachments() {
    $this->attachment = array();
  }

  /**
     * Clears all custom headers.  Returns void.
     * @return void
     */
  function ClearCustomHeaders() {
    $this->CustomHeader = array();
  }


  /////////////////////////////////////////////////
  // MISCELLANEOUS METHODS
  /////////////////////////////////////////////////

  /**
     * Adds the error message to the error container.
     * Returns void.
     * @access private
     * @return void
     */
  function SetError($msg) {
    $this->error_count++;
    $this->ErrorInfo = $msg;
  }

  /**
     * Returns the proper RFC 822 formatted date.
     * @access private
     * @return string
     */
  function RFCDate() {
    $tz = date("Z");
    $tzs = ($tz < 0) ? "-" : "+";
    $tz = abs($tz);
    $tz = ($tz/3600)*100 + ($tz%3600)/60;
    $result = sprintf("%s %s%04d", date("D, j M Y H:i:s"), $tzs, $tz);

    return $result;
  }

  /**
     * Returns the appropriate server variable.  Should work with both
     * PHP 4.1.0+ as well as older versions.  Returns an empty string
     * if nothing is found.
     * @access private
     * @return mixed
     */
  function ServerVar($varName) {
    global $HTTP_SERVER_VARS;
    global $HTTP_ENV_VARS;

    if(!isset($_SERVER))
    {
      $_SERVER = $HTTP_SERVER_VARS;
      if(!isset($_SERVER["REMOTE_ADDR"]))
      $_SERVER = $HTTP_ENV_VARS; // must be Apache
    }

    if(isset($_SERVER[$varName]))
    return $_SERVER[$varName];
    else
    return "";
  }

  /**
     * Returns the server hostname or 'localhost.localdomain' if unknown.
     * @access private
     * @return string
     */
  function ServerHostname() {
    if ($this->Hostname != "")
    $result = $this->Hostname;
    elseif ($this->ServerVar('SERVER_NAME') != "")
    $result = $this->ServerVar('SERVER_NAME');
    else
    $result = "localhost.localdomain";

    return $result;
  }

  /**
     * Returns a message in the appropriate language.
     * @access private
     * @return string
     */
  function Lang($key) {
    if(count($this->language) < 1)
    $this->SetLanguage("en"); // set the default language

    if(isset($this->language[$key]))
    return $this->language[$key];
    else
    return "Language string failed to load: " . $key;
  }

  /**
     * Returns true if an error occurred.
     * @return bool
     */
  function IsError() {
    return ($this->error_count > 0);
  }

  /**
     * Changes every end of line from CR or LF to CRLF.
     * @access private
     * @return string
     */
  function FixEOL($str) {
    $str = str_replace("\r\n", "\n", $str);
    $str = str_replace("\r", "\n", $str);
    $str = str_replace("\n", $this->LE, $str);
    return $str;
  }

  /**
     * Adds a custom header.
     * @return void
     */
  function AddCustomHeader($custom_header) {
    $this->CustomHeader[] = explode(":", $custom_header, 2);
  }
}

