mirror of
https://github.com/gryf/ebook-converter.git
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gryf
0f9792df36
Here is the first batch of modules, which are needed for converting several formats to LRF. Some of the logic has been change, more cleanups will follow.
47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
#!/usr/bin/env python2
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# vim:fileencoding=utf-8
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from __future__ import absolute_import, division, print_function, unicode_literals
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__license__ = 'GPL v3'
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__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
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from ebook_converter.ebooks.metadata.book import TOP_LEVEL_IDENTIFIERS, ALL_METADATA_FIELDS
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from ebook_converter.utils.formatter import TemplateFormatter
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class SafeFormat(TemplateFormatter):
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def __init__(self):
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TemplateFormatter.__init__(self)
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def get_value(self, orig_key, args, kwargs):
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if not orig_key:
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return ''
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key = orig_key = orig_key.lower()
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if (key != 'title_sort' and key not in TOP_LEVEL_IDENTIFIERS and
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key not in ALL_METADATA_FIELDS):
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from ebook_converter.ebooks.metadata.book.base import field_metadata
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key = field_metadata.search_term_to_field_key(key)
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if key is None or (self.book and
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key not in self.book.all_field_keys()):
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if hasattr(self.book, orig_key):
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key = orig_key
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else:
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raise ValueError(_('Value: unknown field ') + orig_key)
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try:
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b = self.book.get_user_metadata(key, False)
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except:
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b = None
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if b and b['datatype'] in {'int', 'float'} and self.book.get(key, None) is None:
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v = ''
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else:
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v = self.book.format_field(key, series_with_index=False)[1]
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if v is None:
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return ''
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if v == '':
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return ''
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return v
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