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Various tweaks to the way smart_update works

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Kovid Goyal 2010-09-12 12:08:18 -06:00
parent 1db3f30ec9
commit db54abd2b6
1 changed files with 21 additions and 13 deletions
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34
src/calibre/ebooks/metadata/book/base.py
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@ -202,12 +202,12 @@ class Metadata(object):
def smart_update(self, other, replace_metadata=False):
'''
Merge the information in C{other} into self. In case of conflicts, the information
in C{other} takes precedence, unless the information in other is NULL.
Merge the information in `other` into self. In case of conflicts, the information
in `other` takes precedence, unless the information in `other` is NULL.
'''
def copy_not_none(dest, src, attr):
v = getattr(src, attr, None)
if v is not None:
if v not in (None, NULL_VALUES.get(attr, None)):
setattr(dest, attr, copy.deepcopy(v))
if other.title and other.title != _('Unknown'):
@ -216,32 +216,38 @@ class Metadata(object):
self.title_sort = other.title_sort
if other.authors and other.authors[0] != _('Unknown'):
self.authors = other.authors
self.authors = list(other.authors)
if hasattr(other, 'author_sort_map'):
self.author_sort_map = other.author_sort_map
self.author_sort_map = dict(other.author_sort_map)
if hasattr(other, 'author_sort'):
self.author_sort = other.author_sort
if replace_metadata:
SPECIAL_FIELDS = frozenset(['lpath', 'size', 'comments'])
for attr in COPYABLE_METADATA_FIELDS:
setattr(self, attr, getattr(other, attr, 1.0 if \
attr == 'series_index' else None))
self.tags = other.tags
self.cover_data = getattr(other, 'cover_data', '')
self.cover_data = getattr(other, 'cover_data',
NULL_VALUES['cover_data'])
self.set_all_user_metadata(other.get_all_user_metadata(make_copy=True))
copy_not_none(self, other, 'lpath')
copy_not_none(self, other, 'size')
copy_not_none(self, other, 'comments')
for x in SPECIAL_FIELDS:
copy_not_none(self, other, x)
# language is handled below
else:
for attr in COPYABLE_METADATA_FIELDS:
if hasattr(other, attr):
copy_not_none(self, other, attr)
val = getattr(other, attr)
if val is not None:
setattr(self, attr, copy.deepcopy(val))
if other.tags:
self.tags += list(set(self.tags + other.tags))
# Case-insensitive but case preserving merging
lotags = [t.lower() for t in other.tags]
lstags = [t.lower() for t in self.tags]
ot, st = map(frozenset, (lotags, lstags))
for t in st.interection(ot):
sidx = lstags.index(t)
oidx = lotags.index(t)
self.tags[sidx] = other.tags[oidx]
self.tags += [t for t in other.tags if t.lower() in ot-st]
if getattr(other, 'cover_data', False):
other_cover = other.cover_data[-1]
self_cover = self.cover_data[-1] if self.cover_data else ''
@ -262,6 +268,7 @@ class Metadata(object):
other_comments = ''
if len(other_comments.strip()) > len(my_comments.strip()):
self.comments = other_comments
other_lang = getattr(other, 'language', None)
if other_lang and other_lang.lower() != 'und':
self.language = other_lang
@ -383,3 +390,4 @@ class Metadata(object):
return bool(self.title or self.author or self.comments or self.tags)
# }}}