zbateson / mail-mime-parser

     * $this->contentPart.  Adds the current contentPart below the newly created

     * alternative part.

     */

    private function createAlternativeContentPart()

    {

        $altPart = $this->mimePartFactory->newMimePart();

        $contentPart = $this->contentPart;

        $this->setMimeHeaderBoundaryOnPart($altPart, 'multipart/alternative');

        $this->removePart($contentPart);

        $contentPart->setParent($altPart);

        $this->contentPart = null;

        $altPart->setParent($this);

        $this->addPart($altPart, 0);

        $this->addPart($contentPart, 0);

    }

    /**

     * Copies Content-Type, Content-Disposition and Content-Transfer-Encoding

     * 

     * @param string $body

     */

    public function createSignaturePart($body)

    {

        $signedPart = $this->signedSignaturePart;

        if ($signedPart === null) {

            $signedPart = $this->mimePartFactory->newMimePart();

            $signedPart->setParent($this);

            $this->addPart($signedPart);

            $this->signedSignaturePart = $signedPart;

        }

        $signedPart->setRawHeader(

            'Content-Type',

            $this->getHeaderParameter('Content-Type', 'protocol')

        );

        $signedPart->setContent($body);

    }

    /**

     * Loops over parts of this message and sets the content-transfer-encoding