Current File : //proc/thread-self/root/usr/lib/calibre/calibre/ebooks/metadata/book/formatter.py
#!/usr/bin/env python3
__license__ = 'GPL v3'
__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
from calibre.ebooks.metadata.book import TOP_LEVEL_IDENTIFIERS, ALL_METADATA_FIELDS
from calibre.utils.formatter import TemplateFormatter
from numbers import Number
class SafeFormat(TemplateFormatter):
def __init__(self):
TemplateFormatter.__init__(self)
def get_value(self, orig_key, args, kwargs):
if not orig_key or isinstance(orig_key, Number):
return ''
key = orig_key = orig_key.lower()
if (key != 'title_sort' and key not in TOP_LEVEL_IDENTIFIERS and
key not in ALL_METADATA_FIELDS):
from calibre.ebooks.metadata.book.base import field_metadata
key = field_metadata.search_term_to_field_key(key)
if key is None or (self.book and
key not in self.book.all_field_keys()):
if hasattr(self.book, orig_key):
key = orig_key
else:
raise ValueError(_('Value: unknown field ') + orig_key)
try:
b = self.book.get_user_metadata(key, False)
except:
b = None
if b and b['datatype'] in {'int', 'float'} and self.book.get(key, None) is None:
v = ''
else:
v = self.book.format_field(key, series_with_index=False)[1]
if v is None:
return ''
if v == '':
return ''
return v
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