mime.php

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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003  Richard Heyes                                |
// | Copyright (c) 2003-2005  The PHP Group                                |
// | All rights reserved.                                                  |
// |                                                                       |
// | Redistribution and use in source and binary forms, with or without    |
// | modification, are permitted provided that the following conditions    |
// | are met:                                                              |
// |                                                                       |
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// |   notice, this list of conditions and the following disclaimer.       |
// | o Redistributions in binary form must reproduce the above copyright   |
// |   notice, this list of conditions and the following disclaimer in the |
// |   documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote      |
// |   products derived from this software without specific prior written  |
// |   permission.                                                         |
// |                                                                       |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     |
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// |                                                                       |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <[e-mail]>                           |
// |         Tomas V.V.Cox <[e-mail]> (port to PEAR)                |
// +-----------------------------------------------------------------------+
//
// $Id: mime.php,v 1.39 2005/06/13 21:24:16 cipri Exp $

require_once(PEAR_DIR.'PEAR.php');
require_once(PEAR_DIR.'Mail/mimePart.php');

/**
 * Mime mail composer class. Can handle: text and html bodies, embedded html
 * images and attachments.
 * Documentation and examples of this class are avaible here:
 * http://pear.php.net/manual/
 *
 * @notes This class is based on HTML Mime Mail class from
 *   Richard Heyes <[e-mail]> which was based also
 *   in the mime_mail.class by Tobias Ratschiller <[e-mail]> and
 *   Sascha Schumann <[e-mail]>
 *
 * @author   Richard Heyes <[e-mail]>
 * @author   Tomas V.V.Cox <[e-mail]>
 * @package  Mail
 * @access   public
 */
class Mail_mime
{
    /**
     * Contains the plain text part of the email
     * @var string
     */
    var $_txtbody;
    /**
     * Contains the html part of the email
     * @var string
     */
    var $_htmlbody;
    /**
     * contains the mime encoded text
     * @var string
     */
    var $_mime;
    /**
     * contains the multipart content
     * @var string
     */
    var $_multipart;
    /**
     * list of the attached images
     * @var array
     */
    var $_html_images = array();
    /**
     * list of the attachements
     * @var array
     */
    var $_parts = array();
    /**
     * Build parameters
     * @var array
     */
    var $_build_params = array();
    /**
     * Headers for the mail
     * @var array
     */
    var $_headers = array();
    /**
     * End Of Line sequence (for serialize)
     * @var string
     */
    var $_eol;


    /**
     * Constructor function
     *
     * @access public
     */
    function Mail_mime($crlf = "\r\n")
    {
        $this->_setEOL($crlf);
        $this->_build_params = array(
                                     'text_encoding' => '7bit',
                                     'html_encoding' => '7bit',
//                                    'html_encoding' => 'quoted-printable',
                                     '7bit_wrap'     => 4096,
                                     'html_charset'  => 'ISO-8859-1',
                                     'text_charset'  => 'ISO-8859-1',
                                     'head_charset'  => 'ISO-8859-1'
                                    );
    }

    /**
     * Wakeup (unserialize) - re-sets EOL constant
     *
     * @access private
     */
    function __wakeup()
    {
        $this->_setEOL($this->_eol);
    }

    /**
     * Accessor function to set the body text. Body text is used if
     * it's not an html mail being sent or else is used to fill the
     * text/plain part that emails clients who don't support
     * html should show.
     *
     * @param  string  $data   Either a string or
     *                         the file name with the contents
     * @param  bool    $isfile If true the first param should be treated
     *                         as a file name, else as a string (default)
     * @param  bool    $append If true the text or file is appended to
     *                         the existing body, else the old body is
     *                         overwritten
     * @return mixed   true on success or PEAR_Error object
     * @access public
     */
    function setTXTBody($data, $isfile = false, $append = false)
    {
        if (!$isfile) {
            if (!$append) {
                $this->_txtbody = $data;
            } else {
                $this->_txtbody .= $data;
            }
        } else {
            $cont = $this->_file2str($data);
            if (PEAR::isError($cont)) {
                return $cont;
            }
            if (!$append) {
                $this->_txtbody = $cont;
            } else {
                $this->_txtbody .= $cont;
            }
        }
        return true;
    }

    /**
     * Adds a html part to the mail
     *
     * @param  string  $data   Either a string or the file name with the
     *                         contents
     * @param  bool    $isfile If true the first param should be treated
     *                         as a file name, else as a string (default)
     * @return mixed   true on success or PEAR_Error object
     * @access public
     */
    function setHTMLBody($data, $isfile = false)
    {
        if (!$isfile) {
            $this->_htmlbody = $data;
        } else {
            $cont = $this->_file2str($data);
            if (PEAR::isError($cont)) {
                return $cont;
            }
            $this->_htmlbody = $cont;
        }

        return true;
    }

    /**
     * Adds an image to the list of embedded images.
     *
     * @param  string  $file       The image file name OR image data itself
     * @param  string  $c_type     The content type
     * @param  string  $name       The filename of the image.
     *                             Only use if $file is the image data
     * @param  bool    $isfilename Whether $file is a filename or not
     *                             Defaults to true
     * @return mixed   true on success or PEAR_Error object
     * @access public
     */
    function addHTMLImage($file, $c_type='application/octet-stream',
                          $name = '', $isfilename = true)
    {
        $filedata = ($isfilename === true) ? $this->_file2str($file)
                                           : $file;
        if ($isfilename === true) {
            $filename = ($name == '' ? basename($file) : basename($name));
        } else {
            $filename = basename($name);
        }
        if (PEAR::isError($filedata)) {
            return $filedata;
        }
        $this->_html_images[] = array(
                                      'body'   => $filedata,
                                      'name'   => $filename,
                                      'c_type' => $c_type,
                                      'cid'    => md5(uniqid(time()))
                                     );
        return true;
    }

    /**
     * Adds a file to the list of attachments.
     *
     * @param  string  $file       The file name of the file to attach
     *                             OR the file data itself
     * @param  string  $c_type     The content type
     * @param  string  $name       The filename of the attachment
     *                             Only use if $file is the file data
     * @param  bool    $isFilename Whether $file is a filename or not
     *                             Defaults to true
     * @return mixed true on success or PEAR_Error object
     * @access public
     */
    function addAttachment($file, $c_type = 'application/octet-stream',
                           $name = '', $isfilename = true,
                           $encoding = 'base64')
    {
        $filedata = ($isfilename === true) ? $this->_file2str($file)
                                           : $file;
        if ($isfilename === true) {
            // Force the name the user supplied, otherwise use $file
            $filename = (!empty($name)) ? $name : $file;
        } else {
            $filename = $name;
        }
        if (empty($filename)) {
            return PEAR::raiseError(
              'The supplied filename for the attachment can\'t be empty'
            );
        }
        $filename = basename($filename);
        if (PEAR::isError($filedata)) {
            return $filedata;
        }

        $this->_parts[] = array(
                                'body'     => $filedata,
                                'name'     => $filename,
                                'c_type'   => $c_type,
                                'encoding' => $encoding
                               );
        return true;
    }

    /**
     * Get the contents of the given file name as string
     *
     * @param  string  $file_name  path of file to process
     * @return string  contents of $file_name
     * @access private
     */
    function &_file2str($file_name)
    {
        if (!is_readable($file_name)) {
            return PEAR::raiseError('File is not readable ' . $file_name);
        }
        if (!$fd = fopen($file_name, 'rb')) {
            return PEAR::raiseError('Could not open ' . $file_name);
        }
        $filesize = filesize($file_name);
        if ($filesize == 0){
            $cont =  "";
        }else{
            $cont = fread($fd, $filesize);
        }
        fclose($fd);
        return $cont;
    }

    /**
     * Adds a text subpart to the mimePart object and
     * returns it during the build process.
     *
     * @param mixed    The object to add the part to, or
     *                 null if a new object is to be created.
     * @param string   The text to add.
     * @return object  The text mimePart object
     * @access private
     */
    function &_addTextPart(&$obj, $text)
    {
        $params['content_type'] = 'text/plain';
        $params['encoding']     = $this->_build_params['text_encoding'];
        $params['charset']      = $this->_build_params['text_charset'];
        if (is_object($obj)) {
            return $obj->addSubpart($text, $params);
        } else {
            return new Mail_mimePart($text, $params);
        }
    }

    /**
     * Adds a html subpart to the mimePart object and
     * returns it during the build process.
     *
     * @param  mixed   The object to add the part to, or
     *                 null if a new object is to be created.
     * @return object  The html mimePart object
     * @access private
     */
    function &_addHtmlPart(&$obj)
    {
        $params['content_type'] = 'text/html';
        $params['encoding']     = $this->_build_params['html_encoding'];
        $params['charset']      = $this->_build_params['html_charset'];
        if (is_object($obj)) {
            return $obj->addSubpart($this->_htmlbody, $params);
        } else {
            return new Mail_mimePart($this->_htmlbody, $params);
        }
    }

    /**
     * Creates a new mimePart object, using multipart/mixed as
     * the initial content-type and returns it during the
     * build process.
     *
     * @return object  The multipart/mixed mimePart object
     * @access private
     */
    function &_addMixedPart()
    {
        $params['content_type'] = 'multipart/mixed';
        return new Mail_mimePart('', $params);
    }