Part.php

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<?php
#require_once 'Zend/Mime.php';

class Zend_Mime_Part
{

    public $type = Zend_Mime::TYPE_OCTETSTREAM;

    public $encoding = Zend_Mime::ENCODING_8BIT;

    public $id;

    public $disposition;

    public $filename;

    public $description;

    public $charset;

    public $boundary;

    public $location;

    public $language;

    protected $_content;

    protected $_isStream = false;

    public function __construct($content)
    {
        $this->_content = $content;
        if (is_resource($content)) {
            $this->_isStream = true;
        }
    }

    public function isStream()
    {
        return $this->_isStream;
    }

    public function getEncodedStream()
    {
        if (!$this->_isStream) {
            #require_once 'Zend/Mime/Exception.php';
            throw new Zend_Mime_Exception(
                'Attempt to get a stream from a string part'
            );
        }

        //stream_filter_remove(); // ??? is that right?
        switch ($this->encoding) {
            case Zend_Mime::ENCODING_QUOTEDPRINTABLE:
                $filter = stream_filter_append(
                    $this->_content,
                    'convert.quoted-printable-encode',
                    STREAM_FILTER_READ,
                    array(
                        'line-length'      => 76,
                        'line-break-chars' => Zend_Mime::LINEEND
                    )
                );
                if (!is_resource($filter)) {
                    #require_once 'Zend/Mime/Exception.php';
                    throw new Zend_Mime_Exception(
                        'Failed to append quoted-printable filter'
                    );
                }
                break;

            case Zend_Mime::ENCODING_BASE64:
                $filter = stream_filter_append(
                    $this->_content,
                    'convert.base64-encode',
                    STREAM_FILTER_READ,
                    array(
                        'line-length'      => 76,
                        'line-break-chars' => Zend_Mime::LINEEND
                    )
                );
                if (!is_resource($filter)) {
                    #require_once 'Zend/Mime/Exception.php';
                    throw new Zend_Mime_Exception(
                        'Failed to append base64 filter'
                    );
                }
                break;

            default:
        }

        return $this->_content;
    }

    public function getContent($EOL = Zend_Mime::LINEEND)
    {
        if ($this->_isStream) {
            return stream_get_contents($this->getEncodedStream());
        } else {
            return Zend_Mime::encode($this->_content, $this->encoding, $EOL);
        }
    }

    public function getRawContent()
    {
        if ($this->_isStream) {
            return stream_get_contents($this->_content);
        } else {
            return $this->_content;
        }
    }

    public function getHeadersArray($EOL = Zend_Mime::LINEEND)
    {
        $headers = array();

        $contentType = $this->type;
        if ($this->charset) {
            $contentType .= '; charset=' . $this->charset;
        }

        if ($this->boundary) {
            $contentType .= ';' . $EOL
                            . " boundary=\"" . $this->boundary . '"';
        }

        $headers[] = array(
            'Content-Type',
            $contentType
        );

        if ($this->encoding) {
            $headers[] = array(
                'Content-Transfer-Encoding',
                $this->encoding
            );
        }

        if ($this->id) {
            $headers[] = array(
                'Content-ID',
                '<' . $this->id . '>'
            );
        }

        if ($this->disposition) {
            $disposition = $this->disposition;
            if ($this->filename) {
                $disposition .= '; filename="' . $this->filename . '"';
            }
            $headers[] = array(
                'Content-Disposition',
                $disposition
            );
        }

        if ($this->description) {
            $headers[] = array(
                'Content-Description',
                $this->description
            );
        }

        if ($this->location) {
            $headers[] = array(
                'Content-Location',
                $this->location
            );
        }

        if ($this->language) {
            $headers[] = array(
                'Content-Language',
                $this->language
            );
        }

        return $headers;
    }

    public function getHeaders($EOL = Zend_Mime::LINEEND)
    {
        $res = '';
        foreach ($this->getHeadersArray($EOL) as $header) {
            $res .= $header[0] . ': ' . $header[1] . $EOL;
        }

        return $res;
    }
}