From fe1450cba0cc808dd843f327c4383930a78effca Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 26 Jan 2021 12:30:28 +0100
Subject: helper: move mimewrap() to the only place where it is called

---
 alot/helper.py | 116 ---------------------------------------------------------
 1 file changed, 116 deletions(-)

(limited to 'alot/helper.py')

diff --git a/alot/helper.py b/alot/helper.py
index 4283faea..0664f71e 100644
--- a/alot/helper.py
+++ b/alot/helper.py
@@ -10,10 +10,6 @@ import os
 import re
 import shlex
 import email
-from email.mime.audio import MIMEAudio
-from email.mime.base import MIMEBase
-from email.mime.image import MIMEImage
-from email.mime.text import MIMEText
 
 import magic
 
@@ -163,118 +159,6 @@ def guess_mimetype(blob):
         mimetype = magictype
     return mimetype
 
-
-def guess_encoding(blob):
-    """
-    uses file magic to determine the encoding of the given data blob.
-
-    :param blob: file content as read by file.read()
-    :type blob: data
-    :returns: encoding
-    :rtype: str
-    """
-    # this is a bit of a hack to support different versions of python magic.
-    # Hopefully at some point this will no longer be necessary
-    #
-    # the version with open() is the bindings shipped with the file source from
-    # http://darwinsys.com/file/ - this is what is used by the python-magic
-    # package on Debian/Ubuntu.  However it is not available on pypi/via pip.
-    #
-    # the version with from_buffer() is available at
-    # https://github.com/ahupp/python-magic and directly installable via pip.
-    #
-    # for more detail see https://github.com/pazz/alot/pull/588
-    if hasattr(magic, 'open'):
-        m = magic.open(magic.MAGIC_MIME_ENCODING)
-        m.load()
-        return m.buffer(blob)
-    elif hasattr(magic, 'from_buffer'):
-        m = magic.Magic(mime_encoding=True)
-        return m.from_buffer(blob)
-    else:
-        raise Exception('Unknown magic API')
-
-
-def libmagic_version_at_least(version):
-    """
-    checks if the libmagic library installed is more recent than a given
-    version.
-
-    :param version: minimum version expected in the form XYY (i.e. 5.14 -> 514)
-                    with XYY >= 513
-    """
-    if hasattr(magic, 'open'):
-        magic_wrapper = magic._libraries['magic']
-    elif hasattr(magic, 'from_buffer'):
-        magic_wrapper = magic.libmagic
-    else:
-        raise Exception('Unknown magic API')
-
-    if not hasattr(magic_wrapper, 'magic_version'):
-        # The magic_version function has been introduced in libmagic 5.13,
-        # if it's not present, we can't guess right, so let's assume False
-        return False
-
-    # Depending on the libmagic/ctypes version, magic_version is a function or
-    # a callable:
-    if callable(magic_wrapper.magic_version):
-        return magic_wrapper.magic_version() >= version
-
-    return magic_wrapper.magic_version >= version
-
-
-# TODO: make this work on blobs, not paths
-def mimewrap(path, filename=None, ctype=None):
-    """Take the contents of the given path and wrap them into an email MIME
-    part according to the content type.  The content type is auto detected from
-    the actual file contents and the file name if it is not given.
-
-    :param path: the path to the file contents
-    :type path: str
-    :param filename: the file name to use in the generated MIME part
-    :type filename: str or None
-    :param ctype: the content type of the file contents in path
-    :type ctype: str or None
-    :returns: the message MIME part storing the data from path
-    :rtype: subclasses of email.mime.base.MIMEBase
-    """
-
-    with open(path, 'rb') as f:
-        content = f.read()
-    if not ctype:
-        ctype = guess_mimetype(content)
-        # libmagic < 5.12 incorrectly detects excel/powerpoint files as
-        # 'application/msword' (see #179 and #186 in libmagic bugtracker)
-        # This is a workaround, based on file extension, useful as long
-        # as distributions still ship libmagic 5.11.
-        if (ctype == 'application/msword' and
-                not libmagic_version_at_least(513)):
-            mimetype, _ = mimetypes.guess_type(path)
-            if mimetype:
-                ctype = mimetype
-
-    maintype, subtype = ctype.split('/', 1)
-    if maintype == 'text':
-        part = MIMEText(content.decode(guess_encoding(content), 'replace'),
-                        _subtype=subtype,
-                        _charset='utf-8')
-    elif maintype == 'image':
-        part = MIMEImage(content, _subtype=subtype)
-    elif maintype == 'audio':
-        part = MIMEAudio(content, _subtype=subtype)
-    else:
-        part = MIMEBase(maintype, subtype)
-        part.set_payload(content)
-        # Encode the payload using Base64
-        email.encoders.encode_base64(part)
-    # Set the filename parameter
-    if not filename:
-        filename = os.path.basename(path)
-    part.add_header('Content-Disposition', 'attachment',
-                    filename=filename)
-    return part
-
-
 def shell_quote(text):
     """Escape the given text for passing it to the shell for interpretation.
     The resulting string will be parsed into one "word" (in the sense used in
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