# Copyright (C) 2001-2006 Python Software Foundation

# Author: Barry Warsaw

# Contact: email-sig@python.org

"""Class representing image/* type MIME documents."""

__all__ = ['MIMEImage']

import imghdr

from email import encoders

from email.mime.nonmultipart import MIMENonMultipart

class MIMEImage(MIMENonMultipart):

    """Class for generating image/* type MIME documents."""

    def __init__(self, _imagedata, _subtype=None,

                 _encoder=encoders.encode_base64, **_params):

        """Create an image/* type MIME document.

        _imagedata is a string containing the raw image data.  If this data

        can be decoded by the standard Python `imghdr' module, then the

        subtype will be automatically included in the Content-Type header.

        Otherwise, you can specify the specific image subtype via the _subtype

        parameter.

        _encoder is a function which will perform the actual encoding for

        transport of the image data.  It takes one argument, which is this

        Image instance.  It should use get_payload() and set_payload() to

        change the payload to the encoded form.  It should also add any

        Content-Transfer-Encoding or other headers to the message as

        necessary.  The default encoding is Base64.

        Any additional keyword arguments are passed to the base class

        constructor, which turns them into parameters on the Content-Type

        header.

        """

        if _subtype is None:

            _subtype = imghdr.what(None, _imagedata)

        if _subtype is None:

            raise TypeError('Could not guess image MIME subtype')

        MIMENonMultipart.__init__(self, 'image', _subtype, **_params)

        self.set_payload(_imagedata)

        _encoder(self)