#!/usr/bin/env python3
# Copyright (C) 2006-2007 Søren Roug, European Environment Agency
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# Contributor(s):
#

# This script lists the content of the manifest.xml file

import zipfile
from xml.sax import make_parser,handler
from xml.sax.xmlreader import InputSource
import io

MANIFESTNS="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0"

# -----------------------------------------------------------------------------
#
# ODFMANIFESTHANDLER
#
# -----------------------------------------------------------------------------


class ODFManifestHandler(handler.ContentHandler):
    """ The ODFManifestHandler parses a manifest file and produces a list of
        content """

    def __init__(self):
        self.manifest = {}

        # Tags
        # FIXME: Also handle encryption data
        self.elements = {
        (MANIFESTNS, 'file-entry'): (self.s_file_entry, self.donothing),
        }

    def handle_starttag(self, tag, method, attrs):
        method(tag,attrs)

    def handle_endtag(self, tag, method):
        method(tag)

    def startElementNS(self, tag, qname, attrs):
        method = self.elements.get(tag, (None, None))[0]
        if method:
            self.handle_starttag(tag, method, attrs)
        else:
            self.unknown_starttag(tag,attrs)

    def endElementNS(self, tag, qname):
        method = self.elements.get(tag, (None, None))[1]
        if method:
            self.handle_endtag(tag, method)
        else:
            self.unknown_endtag(tag)

    def unknown_starttag(self, tag, attrs):
        pass

    def unknown_endtag(self, tag):
        pass

    def donothing(self, tag, attrs=None):
        pass

    def s_file_entry(self, tag, attrs):
        m = attrs.get((MANIFESTNS, 'media-type'),"application/octet-stream")
        p = attrs.get((MANIFESTNS, 'full-path'))
        self.manifest[p] = {'media-type':m, 'full-path':p}


# -----------------------------------------------------------------------------
#
# Reading the file
#
# -----------------------------------------------------------------------------

def manifestlist(manifestxml):
    odhandler = ODFManifestHandler()
    parser = make_parser()
    parser.setFeature(handler.feature_namespaces, 1)
    parser.setContentHandler(odhandler)
    parser.setErrorHandler(handler.ErrorHandler())

    inpsrc = InputSource()
    inpsrc.setByteStream(io.BytesIO(manifestxml))
    parser.setFeature(handler.feature_external_ges, False)  # Changed by Kovid to ignore external DTDs
    parser.parse(inpsrc)

    return odhandler.manifest


def odfmanifest(odtfile):
    z = zipfile.ZipFile(odtfile)
    manifest = z.read('META-INF/manifest.xml')
    z.close()
    return manifestlist(manifest)


if __name__ == "__main__":
    import sys
    result = odfmanifest(sys.argv[1])
    for file in result.values():
        print("%-40s %-40s" % (file['media-type'], file['full-path']))