From 10cd48576653f25cb0dcec5b957ebb025399fe39 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexis=20Pi=C3=A9plu?= <alexis@pieplu.ca>
Date: Tue, 10 Sep 2019 14:06:17 -0400
Subject: [PATCH] Implement setMetadata for odt files

1841506
---
 src/calibre/customize/builtins.py  | 11 +++++++-
 src/calibre/ebooks/metadata/odt.py | 40 ++++++++++++++++++++++++------
 2 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/src/calibre/customize/builtins.py b/src/calibre/customize/builtins.py
index 74473cb2a0..53ddfeb059 100644
--- a/src/calibre/customize/builtins.py
+++ b/src/calibre/customize/builtins.py
@@ -578,12 +578,21 @@ class TXTZMetadataWriter(MetadataWriterPlugin):
         from calibre.ebooks.metadata.extz import set_metadata
         set_metadata(stream, mi)
 
+class ODTMetadataWriter(MetadataWriterPlugin):
+
+    name        = 'Set ODT metadata'
+    file_types  = {'odt'}
+    description = _('Set metadata from %s files')%'ODT'
+
+    def set_metadata(self, stream, mi, type):
+        from calibre.ebooks.metadata.odt import set_metadata
+        return set_metadata(stream, mi)
 
 class DocXMetadataWriter(MetadataWriterPlugin):
 
     name        = 'Set DOCX metadata'
     file_types  = {'docx'}
-    description = _('Read metadata from %s files')%'DOCX'
+    description = _('Set metadata from %s files')%'DOCX'
 
     def set_metadata(self, stream, mi, type):
         from calibre.ebooks.metadata.docx import set_metadata
diff --git a/src/calibre/ebooks/metadata/odt.py b/src/calibre/ebooks/metadata/odt.py
index d5c5060ffd..14db202725 100644
--- a/src/calibre/ebooks/metadata/odt.py
+++ b/src/calibre/ebooks/metadata/odt.py
@@ -20,17 +20,18 @@
 #
 from __future__ import absolute_import, division, print_function, unicode_literals
 
-import zipfile, re, io
+import zipfile, re, io, os
 import xml.sax.saxutils
 
 from odf.namespaces import OFFICENS, DCNS, METANS
 from odf.opendocument import load as odLoad
 from odf.draw import Image as odImage, Frame as odFrame
 
-from calibre.ebooks.metadata import MetaInformation, string_to_authors, check_isbn
+from calibre.ebooks.metadata import MetaInformation, string_to_authors, check_isbn, authors_to_string
+
 from calibre.utils.imghdr import identify
 from calibre.utils.date import parse_date
-from calibre.utils.localization import canonicalize_lang
+from calibre.utils.localization import canonicalize_lang, lang_as_iso639_1
 from polyglot.builtins import string_or_bytes
 
 whitespace = re.compile(r'\s+')
@@ -157,16 +158,19 @@ class odfmetaparser(xml.sax.saxutils.XMLGenerator):
     def data(self):
         return normalize(''.join(self._data))
 
-
-def get_metadata(stream, extract_cover=True):
-    zin = zipfile.ZipFile(stream, 'r')
-    odfs = odfmetaparser()
+def get_odf_meta_parsed(stream, mode = 'r', deletefields={}, yieldfields={}, addfields={}):
+    zin = zipfile.ZipFile(stream, mode)
+    odfs = odfmetaparser(deletefields, yieldfields, addfields)
     parser = xml.sax.make_parser()
     parser.setFeature(xml.sax.handler.feature_namespaces, True)
     parser.setFeature(xml.sax.handler.feature_external_ges, False)
     parser.setContentHandler(odfs)
     content = zin.read('meta.xml')
     parser.parse(io.BytesIO(content))
+    return (zin, odfs)
+
+def get_metadata(stream, extract_cover=True):
+    zin, odfs = get_odf_meta_parsed(stream)
     data = odfs.seenfields
     mi = MetaInformation(None, [])
     if 'title' in data:
@@ -220,6 +224,28 @@ def get_metadata(stream, extract_cover=True):
 
     return mi
 
+def get_meta_doc_props(mi):
+    metaFields = {}
+    metaFields[fields.get('title')] = mi.title
+    metaFields[fields.get('creator')] = authors_to_string(mi.authors)
+    if mi.tags:
+        metaFields[fields.get('keyword')] = ', '.join(mi.tags)
+    if mi.comments:
+        metaFields[fields.get('description')] = mi.comments
+    if mi.languages:
+        l = canonicalize_lang(mi.languages[0])
+        metaFields[fields.get('language')] = lang_as_iso639_1(l) or l
+    return metaFields
+
+def set_metadata(stream, mi):
+    from calibre.utils.zipfile import safe_replace
+    metaFields = get_meta_doc_props(mi)
+
+    zin, odfs = get_odf_meta_parsed(stream, addfields=metaFields, deletefields=metaFields)
+    stream.seek(os.SEEK_SET)
+    safe_replace(stream, "meta.xml", io.BytesIO(str(odfs.meta())))
+
+
 
 def read_cover(stream, zin, mi, opfmeta, extract_cover):
     # search for an draw:image in a draw:frame with the name 'opf.cover'