Added epub write support

ebook_converter/ebooks/epub/__init__.py

@@ -0,0 +1,49 @@
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+__license__   = 'GPL v3'
+__copyright__ = '2008, Kovid Goyal kovid@kovidgoyal.net'
+__docformat__ = 'restructuredtext en'
+
+'''
+Conversion to EPUB.
+'''
+from calibre.utils.zipfile import ZipFile, ZIP_STORED
+
+
+def rules(stylesheets):
+    for s in stylesheets:
+        if hasattr(s, 'cssText'):
+            for r in s:
+                if r.type == r.STYLE_RULE:
+                    yield r
+
+
+def simple_container_xml(opf_path, extra_entries=''):
+    return '''\
+<?xml version="1.0"?>
+<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
+   <rootfiles>
+      <rootfile full-path="{0}" media-type="application/oebps-package+xml"/>
+      {extra_entries}
+   </rootfiles>
+</container>
+    '''.format(opf_path, extra_entries=extra_entries)
+
+
+def initialize_container(path_to_container, opf_name='metadata.opf',
+        extra_entries=[]):
+    '''
+    Create an empty EPUB document, with a default skeleton.
+    '''
+    rootfiles = ''
+    for path, mimetype, _ in extra_entries:
+        rootfiles += '<rootfile full-path="{0}" media-type="{1}"/>'.format(
+                path, mimetype)
+    CONTAINER = simple_container_xml(opf_name, rootfiles).encode('utf-8')
+    zf = ZipFile(path_to_container, 'w')
+    zf.writestr('mimetype', b'application/epub+zip', compression=ZIP_STORED)
+    zf.writestr('META-INF/', b'', 0o755)
+    zf.writestr('META-INF/container.xml', CONTAINER)
+    for path, _, data in extra_entries:
+        zf.writestr(path, data)
+    return zf