<?php
/* ***** BEGIN LICENSE BLOCK *****
 *
 * The contents of this file are subject to Austrian copyright reegulations
 * ("Urheberrecht"); you may not use this file except in compliance with
 * those laws.
 * This contents and any derived work, if it gets distributed in any way,
 * is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
 * either express or implied.
 *
 * The Original Code is KaiRo's E-Mail module.
 *
 * The Initial Developer of the Original Code is
 * KaiRo - Robert Kaiser.
 * Portions created by the Initial Developer are Copyright (C) 2003-2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Robert Kaiser <kairo@kairo.at>
 *
 * ***** END LICENSE BLOCK ***** */

class email {
  // email PHP class
  // class/object for creating a new mail and send it
  //
  // function __construct()
  //   CONSTRUCTOR
  //
  // private $debug_toSingleAddress
  //   address to send mail to in debug mode
  //
  // private $subject
  //   the mail's subject line
  //
  // private $sender
  //   the mail's sender (array; fields see recipients)
  //
  // private $replyto
  //   Reply-to address (array; fields see recipients)
  //
  // private $recipients
  //   array of recipients (To: line)
  //   fields: name - real name
  //           mail - email address
  //
  // private $cc
  //   array of CC recipients (fields like recipients)
  //
  // private $bcc
  //   array of BCC recipients (fields like recipients)
  //
  // private $headers
  //   array containing all additional headers
  //   fields: name - headers name
  //           content - header content
  //
  // private $content_type
  //   the mail's content type (MIME-type) [default: text/plain]
  //
  // private $charset
  //   the mail's charset [default: iso-8859-15]
  //
  // private $mailtext
  //   the main mail body
  //
  // private $attachments
  //   array containing all attachments
  //   fields: name - attachment name
  //           content - attachment content
  //           type - MIME type of that attachment
  //
  // public function setDebugAddress($debug_email)
  //   debug mode: send only to this address
  //
  // public function setSubject($newsubject)
  //   set subject of mail
  //
  // public function setSender($email, [$name])
  //   set sender of mail
  //
  // public function setReplyTo($email, [$name])
  //   set reply-to address
  //
  // public function addRecipient($email, [$name])
  //   add a recipient to the mail
  //
  // public function addCC($email, [$name])
  //   add a CC recipient to the mail
  //
  // public function addBCC($email, [$name])
  //   add a BCC recipient to the mail
  //
  // public function addHeader($hname, [$hcontent])
  //   add a header to the mail
  //
  // public function addHeaderAddress($hname, $email, [$name])
  //   add an address header to the mail, possibly with both name and mail parts
  //
  // public function setCharset($newcharset)
  //   set charset for this mail
  //
  // public function addMailText($textpart)
  //   add some text to the mail
  //
  // public function addAttachment($aname, $acontent, [$atype])
  //   add an attachment to the mail, use given file name, content and MIME type (defaults to application/octet-stream)
  //
  // public function getAddresses([$addrtype])
  //   returns an array of all addresses this mail gets sent to
  //     fields: email, name, addrtype
  //       addrtype is one of to/cc/bcc
  //       the $addrtype parameter is a comma-separated list of such types, default: all of them
  //
  // public function send()
  //   really send the mail
  //
  // private function mimeencode($fieldtext, [$stringescape])
  //   helper function:
  //     encode given field text, ready to be placed into an e-mail MIME header
  //     if the boolean $stringescape is true, make sure this is sent as a single word in RFC2822 context (e.g. for names)
  //     see http://www.ietf.org/rfc/rfc2822.txt for the RFC in question

  private $debug_toSingleAddress = '';
  private $subject;
  private $sender = array();
  private $replyto = array();
  private $recipients = array();
  private $cc = array();
  private $bcc = array();
  private $headers = array();
  private $content_type = 'text/plain';
  private $charset = 'iso-8859-15';
  private $mailtext = '';
  private $attachments = array();

  function __construct() {
    // *** constructor ***
  }

  public function setDebugAddress($debug_email) { $this->debug_toSingleAddress = $debug_email; }

  public function setSubject($newsubject) { $this->subject = $newsubject; }

  public function setSender($email, $name = '') { $this->sender = array('mail' => $email, 'name' => $name); }

  public function setReplyTo($email, $name = '') { $this->replyto = array('mail' => $email, 'name' => $name); }

  public function addRecipient($email, $name = '') {
    $this->recipients[] = array('mail' => $email, 'name' => $name);
  }

  public function addCC($email, $name = '') {
    $this->cc[] = array('mail' => $email, 'name' => $name);
  }

  public function addBCC($email, $name = '') {
    $this->bcc[] = array('mail' => $email, 'name' => $name);
  }

  public function addHeader($hname, $hcontent = '') {
    $this->headers[] = array('name' => $hname, 'content' => $hcontent);
  }

  public function addHeaderAddress($hname, $email, $name = '') {
    if (strlen($name)) { $hcontent = $this->mimeencode($name, true).' <'.$email.'>'; }
    else { $hcontent = $email; }
    $this->headers[] = array('name' => $hname, 'content' => $hcontent);
  }

  public function setCharset($newcharset) { $this->charset = $newcharset; }

  public function addMailText($textpart) { $this->mailtext .= $textpart; }

  public function addAttachment($aname, $acontent, $atype = 'application/octet-stream') {
    $this->attachments[] = array('name' => $aname, 'content' => $acontent, 'type' => $atype);
  }

  public function getAddresses($addrtype = null) {
    // returns all addresses this mail gets sent to
    if (!is_array($addrtype)) {
      if (strlen($addrtype)) { $addrtype = explode(',', strtolower($addrtype)); }
      else { $addrtype = array('to','cc','bcc'); }
    }
    $mailaddresses = array();

    if (in_array('to', $addrtype)) {
      foreach ($this->recipients as $address) {
        if (strlen(@$address['mail'])) {
          $mailaddresses[] = array('mail'=>$address['mail'],
                                   'name'=>strlen($address['name'])?$address['name']:'',
                                   'addrtype'=>'to');
        }
      }
    }
    if (in_array('cc', $addrtype)) {
      foreach ($this->cc as $address) {
        if (strlen(@$address['mail'])) {
          $mailaddresses[] = array('mail'=>$address['mail'],
                                   'name'=>strlen($address['name'])?$address['name']:'',
                                   'addrtype'=>'cc');
        }
      }
    }
    if (in_array('bcc', $addrtype)) {
      foreach ($this->bcc as $address) {
        if (strlen(@$address['mail'])) {
          $mailaddresses[] = array('mail'=>$address['mail'],
                                   'name'=>strlen($address['name'])?$address['name']:'',
                                   'addrtype'=>'bcc');
        }
      }
    }

    return $mailaddresses;
  }

  public function send() {
    global $util;
    $mtxt = '';
    $hdrs = 'MIME-Version: 1.0'."\n";
    $subj = $this->mimeencode($this->subject);
    if (strlen($this->sender['name'])) {
      $hdrs .= 'From: '.$this->mimeencode($this->sender['name'], true).' <'.$this->sender['mail'].'>'."\n";
    }
    else { $hdrs .= 'From: '.$this->sender['mail']."\n"; }
    if (count($this->replyto)) {
      if (strlen($this->replyto['name'])) {
        $hdrs .= 'Reply-to: '.$this->mimeencode($this->replyto['name'], true).' <'.$this->replyto['mail'].'>'."\n";
      }
      else { $hdrs .= 'Reply-to: '.$this->replyto['mail']."\n"; }
    }
    if (count($this->recipients)) {
      $recpt = '';
      foreach ($this->recipients as $address) {
        if (strlen(@$address['mail'])) {
          if (strlen($address['name'])) { $recpt .= $this->mimeencode($address['name'], true).' <'.$address['mail'].'>,'; }
          else { $recpt .= $address['mail'].','; }
        }
      }
      $recpt = preg_replace('/,$/', '', $recpt);
    }
    if (!strlen($recpt)) {
      return null;
    }
    if (count($this->cc)) {
      $adrs = '';
      foreach ($this->cc as $address) {
        if (strlen($address['name'])) { $adrs .= $this->mimeencode($address['name'], true).' <'.$address['mail'].'>,'; }
        else { $adrs .= $address['mail'].','; }
      }
      $adrs = preg_replace('/,$/', '', $adrs);
      $hdrs .= (strlen($this->debug_toSingleAddress)?'X-Real-':'').'Cc: '.$adrs."\n";
    }
    if (count($this->bcc)) {
      $adrs = '';
      foreach ($this->bcc as $address) {
        if (strlen($address['name'])) { $adrs .= $this->mimeencode($address['name'], true).' <'.$address['mail'].'>,'; }
        else { $adrs .= $address['mail'].','; }
      }
      $adrs = preg_replace('/,$/', '', $adrs);
      $hdrs .= (strlen($this->debug_toSingleAddress)?'X-Real-':'').'Bcc: '.$adrs."\n";
    }
    if (count($this->headers)) {
      foreach ($this->headers as $header) {
        $hdrs .= $header['name'].': '.$header['content']."\n";
      }
    }
    if (count($this->attachments)) {
      // create random boundary, 20 chars, always beginning with KaiRo ;-)
      $boundary = 'KaiRo';
      for ($i = 1; $i <= 15; $i++)	{
        $r = rand(0, 61);
        if ($r < 10) { $boundary .= chr($r + 48); }
        elseif ($r < 36) { $boundary .= chr($r + 55); }
        elseif ($r < 62) { $boundary .= chr($r + 61); }
      }
      $hdrs .= 'Content-Type: multipart/mixed; boundary="'.$boundary.'";'."\n";
      $hdrs .= 'Content-Transfer-Encoding: 7bit'."\n";
      $mtxt .= 'This part of the E-mail should never be seen. If'."\n";
      $mtxt .= 'you are reading this, consider upgrading your e-mail'."\n";
      $mtxt .= 'client to a MIME-compatible client.'."\n";
      $mtxt .= "\n".'--'.$boundary."\n";
      if (preg_match('|^text/|', $this->content_type)) {
        $mtxt .= 'Content-Type: '.$this->content_type.'; charset="'.$this->charset.'"'."\n";
      }
      else {
        $mtxt .= 'Content-Type: '.$this->content_type."\n";
      }
      $mtxt .= 'Content-Transfer-Encoding: 8bit'."\n\n";
    }
    else {
      if (preg_match('|^text/|', $this->content_type)) {
        $hdrs .= 'Content-Type: '.$this->content_type.'; charset="'.$this->charset.'"'."\n";
      }
      else {
        $hdrs .= 'Content-Type: '.$this->content_type."\n";
      }
      $hdrs .= 'Content-Transfer-Encoding: 8bit'."\n";
    }
    $mtxt .= stripslashes($this->mailtext);
    if (count($this->attachments)) {
      foreach ($this->attachments as $attach) {
        $mtxt .= "\n".'--'.$boundary."\n";
        $mtxt .= 'Content-Type: '.$attach['type'].'; name="'.$attach['name'].'";'."\n";
        if (preg_match('/^(text|message)\//', $attach['type'])) {
          $mtxt .= 'Content-Transfer-Encoding: 8bit'."\n";
          $mtxt .= 'Content-Disposition: attachment'."\n\n";
          $mtxt .= $attach['content'];
          $mtxt .= "\n";
        }
        else {
          $mtxt .= 'Content-Transfer-Encoding: base64'."\n";
          $mtxt .= 'Content-Disposition: attachment'."\n\n";
          $mtxt .= rtrim(chunk_split(base64_encode($attach['content']), 76)); ;
          $mtxt .= "\n";
        }
      }
      $mtxt .= '--'.$boundary.'--'."\n";
    }

    if (strlen($this->debug_toSingleAddress)) {
      $hdrs .= 'X-Real-To: '.$recpt."\n";
      $recpt = $this->debug_toSingleAddress;
    }

    //print('Subject: '.$util->htmlify($subj).'<br>'."\n");
    //print('To: '.$util->htmlify($recpt).'<br>'."\n");
    //print(nl2br($util->htmlify($hdrs)));
    //print(nl2br($util->htmlify($mtxt)));
    return mail($recpt, $subj, $mtxt, $hdrs);
  }

  private function mimeencode($fieldtext, $stringescape = false) {
    $mText = imap_8bit($fieldtext);
    $is_qpformat = ($mText != $fieldtext);
    if ($stringescape && preg_match('/[^\w !#$%&\'*+\/=?^`{|}~-]/', $mText)) {
      // if needed, make this a quoted-string instead of an atom (to speak in RFC2822 language)
      $mText = '"'.strtr($mText, array('"' => '\"', '\\' => '\\\\')).'"';
    }
    if ($is_qpformat) {
      $mText = strtr($mText, array('_' => '=5F', ' ' => '_', '?' => '=3F'));
      $mText = '=?'.strtoupper($this->charset).'?Q?'.$mText.'?=';
    }
  return $mText;
  }
}
?>