# 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, *, policy=None, **_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, policy=policy,
 **_params)
 self.set_payload(_imagedata)
 _encoder(self)