+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from collections import namedtuple
+import os.path
+import optparse
+
+from librarian import DirDocProvider, ParseError
+from librarian.parser import WLDocument
+from librarian.cover import WLCover
+
+
+class Option(object):
+ """Option for optparse. Use it like `optparse.OptionParser.add_option`."""
+ def __init__(self, *names, **options):
+ self.names = names
+ self.options = options
+
+ def add(self, parser):
+ parser.add_option(*self.names, **self.options)
+
+ def name(self):
+ return self.options['dest']
+
+ def value(self, options):
+ return getattr(options, self.name())
+
+
+class Book2Anything(object):
+ """A class for creating book2... scripts.
+
+ Subclass it for any format you want to convert to.
+ """
+ format_name = None # Set format name, like "PDF".
+ ext = None # Set file extension, like "pdf".
+ uses_cover = False # Can it add a cover?
+ cover_optional = True # Only relevant if uses_cover
+ uses_provider = False # Does it need a DocProvider?
+ transform = None # Transform method. Uses WLDocument.as_{ext} by default.
+ parser_options = [] # List of Option objects for additional parser args.
+ transform_options = [] # List of Option objects for additional transform args.
+ transform_flags = [] # List of Option objects for supported transform flags.
+
+
+ @classmethod
+ def run(cls):
+ # Parse commandline arguments
+ usage = """Usage: %%prog [options] SOURCE [SOURCE...]
+ Convert SOURCE files to %s format.""" % cls.format_name
+
+ parser = optparse.OptionParser(usage=usage)
+
+ parser.add_option('-v', '--verbose',
+ action='store_true', dest='verbose', default=False,
+ help='print status messages to stdout')
+ parser.add_option('-d', '--make-dir',
+ action='store_true', dest='make_dir', default=False,
+ help='create a directory for author and put the output file in it')
+ parser.add_option('-o', '--output-file',
+ dest='output_file', metavar='FILE',
+ help='specifies the output file')
+ parser.add_option('-O', '--output-dir',
+ dest='output_dir', metavar='DIR',
+ help='specifies the directory for output')
+ if cls.uses_cover:
+ if cls.cover_optional:
+ parser.add_option('-c', '--with-cover',
+ action='store_true', dest='with_cover', default=False,
+ help='create default cover')
+ parser.add_option('-C', '--image-cache',
+ dest='image_cache', metavar='URL',
+ help='prefix for image download cache' +
+ (' (implies --with-cover)' if cls.cover_optional else ''))
+ for option in cls.parser_options + cls.transform_options + cls.transform_flags:
+ option.add(parser)
+
+ options, input_filenames = parser.parse_args()
+
+ if len(input_filenames) < 1:
+ parser.print_help()
+ return(1)
+
+ # Prepare additional args for parser.
+ parser_args = {}
+ for option in cls.parser_options:
+ parser_args[option.name()] = option.value(options)
+ # Prepare additional args for transform method.
+ transform_args = {}
+ for option in cls.transform_options:
+ transform_args[option.name()] = option.value(options)
+ # Add flags to transform_args, if any.
+ transform_flags = [flag.name() for flag in cls.transform_flags
+ if flag.value(options)]
+ if transform_flags:
+ transform_args['flags'] = transform_flags
+ # Add cover support, if any.
+ if cls.uses_cover:
+ if options.image_cache:
+ transform_args['cover'] = lambda x: WLCover(x, image_cache = options.image_cache)
+ elif not cls.cover_optional or options.with_cover:
+ transform_args['cover'] = WLCover
+
+
+ # Do some real work
+ try:
+ for main_input in input_filenames:
+ if options.verbose:
+ print main_input
+
+ # Where to find input?
+ if cls.uses_provider:
+ path, fname = os.path.realpath(main_input).rsplit('/', 1)
+ provider = DirDocProvider(path)
+ else:
+ provider = None
+
+ # Where to write output?
+ if not (options.output_file or options.output_dir):
+ output_file = os.path.splitext(main_input)[0] + '.' + cls.ext
+ else:
+ output_file = None
+
+ # Do the transformation.
+ doc = WLDocument.from_file(main_input, provider=provider, **parser_args)
+ transform = cls.transform
+ if transform is None:
+ transform = getattr(WLDocument, 'as_%s' % cls.ext)
+ output = transform(doc, **transform_args)
+
+ doc.save_output_file(output,
+ output_file, options.output_dir, options.make_dir, cls.ext)
+
+ except ParseError, e:
+ print '%(file)s:%(name)s:%(message)s' % {
+ 'file': main_input,
+ 'name': e.__class__.__name__,
+ 'message': e
+ }
fnp / librarian.git / commitdiff