<?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.
 *
 * @author Brent R. Matzelle
 * @copyright 2001 - 2003 Brent R. Matzelle
 */
class PHPMailer
{
    // ///////////////////////////////////////////////
    // PUBLIC VARIABLES
    // ///////////////////////////////////////////////

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

    /**
     * Sets the CharSet of the message.
     *
     * @var string
     */
    public $CharSet = 'utf-8';

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

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

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

    /**
     * Sets the From email address for the message.
     *
     * @var string
     */
    public $From = 'robot@kupshop.cz';

    /**
     * Sets the From name of the message.
     *
     * @var string
     */
    public $FromName = '';

    /**
     * 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
     */
    public $Sender = '';

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

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

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

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

    /**
     * Sets the path of the sendmail program.
     *
     * @var string
     */
    public $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
     */
    public $PluginDir = '';

    /**
     *  Holds PHPMailer version.
     *
     * @var string
     */
    public $Version = '1.72';

    /**
     * Sets the email address that a reading confirmation will be sent.
     *
     * @var string
     */
    public $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
     */
    public $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
     */
    public $Host = 'mail.wpj.cz';

    /**
     *  Sets the default SMTP server port.
     *
     * @var int
     */
    public $Port = 587;

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

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

    /**
     *  Sets SMTP username.
     *
     * @var string
     */
    public $Username = 'smtp@wpj.cz';

    /**
     *  Sets SMTP password.
     *
     * @var string
     */
    public $Password = 'smtpwpj';

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

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

    /**#@+
     * @access private
     */
    public $smtp;
    public $to = [];
    public $cc = [];
    public $bcc = [];
    public $ReplyTo = [];
    public $attachment = [];
    public $CustomHeader = [];
    public $message_type = '';
    public $boundary = [];
    public $language = [];
    public $error_count = 0;
    public $LE = "\n";
    /**#@-*/

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

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

    /**
     * Sets Mailer to send message using SMTP.
     */
    public function IsSMTP()
    {
        $this->Mailer = 'smtp';
    }

    /**
     * Sets Mailer to send message using PHP mail() function.
     */
    public function IsMail()
    {
        $this->Mailer = 'mail';
    }

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

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

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

    /**
     * Adds a "To" address.
     *
     * @param string $address
     * @param string $name
     */
    public function AddAddress($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 $name
     */
    public function AddCC($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 $name
     */
    public function AddBCC($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 $name
     */
    public function AddReplyTo($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
     */
    public 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 $Sendmail program.
     *
     * @return bool
     */
    public function SendmailSend($header, $body)
    {
        if ($this->Sender != '') {
            $sendmail = sprintf('%s -oi -f %s -t', $this->Sendmail, $this->Sender);
        } else {
            $sendmail = sprintf('%s -oi -t', $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.
     *
     * @return bool
     */
    public 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.
     *
     * @return bool
     */
    public function SmtpSend($header, $body)
    {
        include_once $this->PluginDir.'class.smtp.php';
        $error = '';
        $bad_rcpt = [];

        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;
            logError(__FILE__, __LINE__, print_r($this->smtp->getError(), true));
            $this->SetError($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;
            logError(__FILE__, __LINE__, print_r($this->smtp->getError(), true));
            $this->SetError($error);
            $this->smtp->Reset();

            return false;
        }

        if (!$this->smtp->Data($header.$body)) {
            $this->SetError($this->Lang('data_not_accepted'));
            logError(__FILE__, __LINE__, print_r($this->smtp->getError(), true));
            $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.
     *
     * @return bool
     */
    public function SmtpConnect()
    {
        if ($this->smtp == null) {
            $this->smtp = new SMTP();
        }

        $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.
     */
    public 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 $lang_path Path to the language file directory
     *
     * @return bool
     */
    public function SetLanguage($lang_type, $lang_path = 'language/')
    {
        if (file_exists($lang_path.'phpmailer.lang-'.$lang_type.'.php')) {
            include $lang_path.'phpmailer.lang-'.$lang_type.'.php';
        } elseif (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.
     *
     * @return string
     */
    public 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.
     *
     * @return string
     */
    public 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.
     *
     * @return string
     */
    public 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.
     */
    public function SetWordWrap()
    {
        if ($this->WordWrap < 1) {
            return;
        }

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

    /**
     * Assembles message header.
     *
     * @return string
     */
    public 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', $this->to);
            } elseif (count($this->cc) == 0) {
                $result .= $this->HeaderLine('To', 'undisclosed-recipients:;');
            }
            if (count($this->cc) > 0) {
                $result .= $this->AddrAppend('Cc', $this->cc);
            }
        }

        $from = [];
        $from[0][0] = trim($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.']');

        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.
     *
     * @return string
     */
    public 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;
        }

        return $result;
    }

    /**
     * Returns the start of a message boundary.
     */
    public 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.
     */
    public function EndBoundary($boundary)
    {
        return $this->LE.'--'.$boundary.'--'.$this->LE;
    }

    /**
     * Sets the message type.
     */
    public 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.
     *
     * @return string
     */
    public function HeaderLine($name, $value)
    {
        return $name.': '.$value.$this->LE;
    }

    /**
     * Returns a formatted mail line.
     *
     * @return string
     */
    public 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 $type     file extension (MIME) type
     *
     * @return bool
     */
    public function AddAttachment($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.
     *
     * @return string
     */
    public function AttachAll()
    {
        // Return text of body
        $mime = [];

        // 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.
     *
     * @return string
     */
    public function EncodeFile($path, $encoding = 'base64')
    {
        if (!@$fd = fopen($path, 'rb')) {
            $this->SetError($this->Lang('file_open').$path);

            return '';
        }
        $file_buffer = fread($fd, filesize($path));
        $file_buffer = $this->EncodeString($file_buffer, $encoding);
        fclose($fd);

        return $file_buffer;
    }

    /**
     * Encodes string to requested format. Returns an
     * empty string on failure.
     *
     * @return string
     */
    public 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.
     *
     * @return string
     */
    public 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
                // no break
            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.
     *
     * @return string
     */
    public 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.
     *
     * @return string
     */
    public function EncodeQ($str, $position = 'text')
    {
        // There should not be any EOL in the string
        $pattern = '';
        $encoded = str_replace(["\r", "\n"], '', $str);
        switch (strtolower($position)) {
            case 'phrase':
                // RFC 2047 section 5.3
                $pattern = '^A-Za-z0-9!*+\/ -';
                break;
                /*
                 * RFC 2047 section 5.2.
                 * Build $pattern without including delimiters and []
                 */
                /* @noinspection PhpMissingBreakStatementInspection */
            case 'comment':
                $pattern = '\(\)"';
                /* Intentional fall through */
                // no break
            case 'text':
            default:
                // RFC 2047 section 5.1
                // Replace every high ascii, control, =, ? and _ characters
                $pattern = '\000-\011\013\014\016-\037\075\077\137\177-\377'.$pattern;
                break;
        }
        $matches = [];
        if (preg_match_all("/[{$pattern}]/", $encoded, $matches)) {
            // If the string contains an '=', make sure it's the first thing we replace
            // so as to avoid double-encoding
            $eqkey = array_search('=', $matches[0], true);
            if (false !== $eqkey) {
                unset($matches[0][$eqkey]);
                array_unshift($matches[0], '=');
            }
            foreach (array_unique($matches[0]) as $char) {
                $encoded = str_replace($char, '='.sprintf('%02X', ord($char)), $encoded);
            }
        }

        // Replace spaces with _ (more readable than =20)
        // RFC 2047 section 4.2(2)
        return str_replace(' ', '_', $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 $type     file extension (MIME) type
     */
    public function AddStringAttachment($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 $type     file extension (MIME) type
     *
     * @return bool
     */
    public function AddEmbeddedImage($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;
    }

    /**
     * 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 $string   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 $filename overrides the attachment name
     * @param string $encoding file encoding (see $Encoding)
     * @param string $type     file extension (MIME) type
     *
     * @return bool
     */
    public function AddEmbeddedString($string, $cid, $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; // isStringAttachment
        $this->attachment[$cur][6] = 'inline';
        $this->attachment[$cur][7] = $cid;

        return true;
    }

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

        return $result;
    }

    /**
     * Extract image attachments from HTML content (data URIs).
     */
    public function ExtractInlineImages()
    {
        global $cfg;

        $body = $this->Body;
        $offset = 0;
        $list = [];

        // get domain for the Content-ID, must be the same as in Mail_Mime::get()
        if (preg_match('#@([0-9a-zA-Z\-\.]+)#', $this->From, $matches)) {
            $domain = $matches[1];
        } else {
            $domain = 'localhost';
        }

        $regexp = '# src=[\'"](data:(image/[a-z]+);base64,([a-z0-9+/=\r\n ]+))([\'"])#i';
        if (preg_match_all($regexp, $body, $matches, PREG_OFFSET_CAPTURE)) {
            foreach ($matches[1] as $idx => $m) {
                $data = preg_replace('/\r\n/', '', $matches[3][$idx][0]);
                $data = base64_decode($data);

                if (empty($data)) {
                    continue;
                }

                $hash = md5($data).'@'.$domain;
                $mime_type = $matches[2][$idx][0];
                $name = getVal($hash, $list);

                // add the image to the MIME message
                if (!$name) {
                    $ext = preg_replace('#^[^/]+/#', '', $mime_type);
                    $name = substr($hash, 0, 8).'.'.$ext;
                    $list[$hash] = $name;

                    if (!$this->AddEmbeddedString($data, $hash, $name, 'base64', $mime_type)) {
                        continue;
                    }
                }

                $hash = 'cid:'.$hash;
                $body = substr_replace($body, $hash, $m[1] + $offset, strlen($m[0]));
                $offset += strlen($hash) - strlen($m[0]);
            }
        }

        $offset = 0;
        $regexp = '#<img[^>]*data-url-image[^>]*src=[\'"]([^\'"]+)[\'"]#i';
        if (preg_match_all($regexp, $body, $matches, PREG_OFFSET_CAPTURE)) {
            foreach ($matches[1] as $idx => $m) {
                $parts = parse_url($matches[1][$idx][0]);
                $path = realpath($cfg['Path']['smarty_tpl']['templates'].'../'.$parts['path']);

                if (empty($path)) {
                    continue;
                }

                $extension = pathinfo($path, PATHINFO_EXTENSION);
                $mime_type = '';
                switch (strtolower($extension)) {
                    case 'gif':
                        $mime_type = 'image/gif';
                        break;
                    case 'jpg':
                    case 'jpeg':
                        $mime_type = 'image/jpeg';
                        break;
                    case 'png':
                        $mime_type = 'image/png';
                        break;
                    default:
                        break;
                }

                $hash = md5($path).'@'.$domain;
                $name = getVal($hash, $list);

                // add the image to the MIME message
                if (!$name) {
                    $name = substr($hash, 0, 8).'.'.$extension;
                    $list[$hash] = $name;

                    if (!$this->AddEmbeddedImage($path, $hash, $name, 'base64', $mime_type)) {
                        continue;
                    }
                }

                $hash = 'cid:'.$hash;
                $body = substr_replace($body, $hash, $m[1] + $offset, strlen($m[0]));
                $offset += strlen($hash) - strlen($m[0]);
            }
        }

        $this->Body = $body;
    }

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

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

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

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

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

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

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

    /**
     * Clears all custom headers.  Returns void.
     */
    public function ClearCustomHeaders()
    {
        $this->CustomHeader = [];
    }

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

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

    /**
     * Returns the proper RFC 822 formatted date.
     *
     * @return string
     */
    public 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.
     */
    public 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.
     *
     * @return string
     */
    public 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.
     *
     * @return string
     */
    public function Lang($key)
    {
        return $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
     */
    public function IsError()
    {
        return $this->error_count > 0;
    }

    /**
     * Changes every end of line from CR or LF to CRLF.
     *
     * @return string
     */
    public 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.
     */
    public function AddCustomHeader($custom_header)
    {
        $this->CustomHeader[] = explode(':', $custom_header, 2);
    }
}