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EPUB metadata: When there are multiple <dc:date> tags use the one with the earliest date as the published date

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Kovid Goyal 2012-08-31 19:40:09 +05:30
parent f59ac23c9c
commit 2292991006
1 changed files with 39 additions and 2 deletions
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41
src/calibre/ebooks/metadata/opf2.py
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@ -510,6 +510,7 @@ class OPF(object): # {{{
tags_path = XPath('descendant::*[re:match(name(), "subject", "i")]')
isbn_path = XPath('descendant::*[re:match(name(), "identifier", "i") and '+
'(re:match(@scheme, "isbn", "i") or re:match(@opf:scheme, "isbn", "i"))]')
pubdate_path = XPath('descendant::*[re:match(name(), "date", "i")]')
raster_cover_path = XPath('descendant::*[re:match(name(), "meta", "i") and ' +
're:match(@name, "cover", "i") and @content]')
identifier_path = XPath('descendant::*[re:match(name(), "identifier", "i")]')
@ -538,8 +539,6 @@ class OPF(object): # {{{
formatter=float, none_is=1)
title_sort = TitleSortField('title_sort', is_dc=False)
rating = MetadataField('rating', is_dc=False, formatter=float)
pubdate = MetadataField('date', formatter=parse_date,
renderer=isoformat)
publication_type = MetadataField('publication_type', is_dc=False)
timestamp = MetadataField('timestamp', is_dc=False,
formatter=parse_date, renderer=isoformat)
@ -852,6 +851,44 @@ def fset(self, val):
return property(fget=fget, fset=fset)
@dynamic_property
def pubdate(self):
def fget(self):
ans = None
for match in self.pubdate_path(self.metadata):
try:
val = parse_date(etree.tostring(match, encoding=unicode,
method='text', with_tail=False).strip())
except:
continue
if ans is None or val < ans:
ans = val
return ans
def fset(self, val):
least_val = least_elem = None
for match in self.pubdate_path(self.metadata):
try:
cval = parse_date(etree.tostring(match, encoding=unicode,
method='text', with_tail=False).strip())
except:
match.getparent().remove(match)
else:
if not val:
match.getparent().remove(match)
if least_val is None or cval < least_val:
least_val, least_elem = cval, match
if val:
if least_val is None:
least_elem = self.create_metadata_element('date')
least_elem.attrib.clear()
least_elem.text = isoformat(val)
return property(fget=fget, fset=fset)
@dynamic_property
def isbn(self):