+# -*- 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 __future__ import with_statement
+
+import os
+import re
+import shutil
+
+class ParseError(Exception):
+ def __str__(self):
+ """ Dirty workaround for Python Unicode handling problems. """
+ return self.message
+
+ def __unicode__(self):
+ """ Dirty workaround for Python Unicode handling problems. """
+ return self.message
+
+class ValidationError(Exception):
+ pass
+
+class NoDublinCore(ValidationError):
+ """There's no DublinCore section, and it's required."""
+ pass
+
+class NoProvider(Exception):
+ """There's no DocProvider specified, and it's needed."""
+ pass
+
+class XMLNamespace(object):
+ '''A handy structure to repsent names in an XML namespace.'''
+
+ def __init__(self, uri):
+ self.uri = uri
+
+ def __call__(self, tag):
+ return '{%s}%s' % (self.uri, tag)
+
+ def __contains__(self, tag):
+ return tag.startswith('{' + str(self) + '}')
+
+ def __repr__(self):
+ return 'XMLNamespace(%r)' % self.uri
+
+ def __str__(self):
+ return '%s' % self.uri
+
+class EmptyNamespace(XMLNamespace):
+ def __init__(self):
+ super(EmptyNamespace, self).__init__('')
+
+ def __call__(self, tag):
+ return tag
+
+# some common namespaces we use
+RDFNS = XMLNamespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
+DCNS = XMLNamespace('http://purl.org/dc/elements/1.1/')
+XINS = XMLNamespace("http://www.w3.org/2001/XInclude")
+XHTMLNS = XMLNamespace("http://www.w3.org/1999/xhtml")
+NCXNS = XMLNamespace("http://www.daisy.org/z3986/2005/ncx/")
+OPFNS = XMLNamespace("http://www.idpf.org/2007/opf")
+
+WLNS = EmptyNamespace()
+
+
+class WLURI(object):
+ """Represents a WL URI. Extracts slug and language from it."""
+ DEFAULT_LANGUAGE = u'pol'
+
+ slug = None
+ language = None
+
+ example = 'http://wolnelektury.pl/katalog/lektura/template/'
+ _re_wl_uri = re.compile('http://wolnelektury.pl/katalog/lektura/'
+ '(?P<slug>[-a-z0-9]+)(/(?P<lang>[a-z]{3}))?/?$')
+
+ def __init__(self, uri=None):
+ if uri is not None:
+ uri = unicode(uri)
+ self.uri = uri
+ match = self._re_wl_uri.match(uri)
+ if not match:
+ raise ValueError('Supplied URI (%s) does not match '
+ 'the WL document URI template.' % uri)
+ self.slug = match.group('slug')
+ self.language = match.group('lang') or self.DEFAULT_LANGUAGE
+
+ @classmethod
+ def from_slug_and_lang(cls, slug, lang):
+ """Contructs an URI from slug and language code.
+
+ >>> WLURI.from_slug_and_lang('a-slug', WLURI.DEFAULT_LANGUAGE).uri
+ u'http://wolnelektury.pl/katalog/lektura/a-slug/'
+ >>> WLURI.from_slug_and_lang('a-slug', 'deu').uri
+ u'http://wolnelektury.pl/katalog/lektura/a-slug/deu/'
+
+ """
+ if lang is None:
+ lang = cls.DEFAULT_LANGUAGE
+ uri = 'http://wolnelektury.pl/katalog/lektura/%s/' % slug
+ if lang is not None and lang != cls.DEFAULT_LANGUAGE:
+ uri += lang + '/'
+ return cls(uri)
+
+ def __unicode__(self):
+ return self.uri
+
+ def __str__(self):
+ return self.uri
+
+ def __eq__(self, other):
+ return self.slug, self.language == other.slug, other.language
+
+ def filename_stem(self):
+ stem = self.slug
+ if self.language != self.DEFAULT_LANGUAGE:
+ stem += '_' + self.language
+ return stem
+
+ def validate_language(self, language):
+ if language != self.language:
+ raise ValidationError("Incorrect language definition in URI")
+
+
+class DocProvider(object):
+ """Base class for a repository of XML files.
+
+ Used for generating joined files, like EPUBs.
+ """
+
+ def by_slug_and_lang(self, slug, lang=None):
+ """Should return a file-like object with a WL document XML."""
+ raise NotImplementedError
+
+ def by_slug(self, slug):
+ """Should return a file-like object with a WL document XML."""
+ return self.by_slug_and_lang(slug)
+
+ def by_uri(self, uri):
+ """Should return a file-like object with a WL document XML."""
+ wluri = WLURI(uri)
+ return self.by_slug_and_lang(wluri.slug, wluri.language)
+
+
+class DirDocProvider(DocProvider):
+ """ Serve docs from a directory of files in form <slug>.xml """
+
+ def __init__(self, dir_):
+ self.dir = dir_
+ self.files = {}
+ return super(DirDocProvider, self).__init__()
+
+ def by_slug_and_lang(self, slug, lang=None):
+ fname = WLURI.from_slug_and_lang(slug, lang).filename_stem() + '.xml'
+ return open(os.path.join(self.dir, fname))
+
+
+import lxml.etree as etree
+import dcparser
+
+DEFAULT_BOOKINFO = dcparser.BookInfo(
+ { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'},
+ { DCNS('creator'): [u'Some, Author'],
+ DCNS('title'): [u'Some Title'],
+ DCNS('subject.period'): [u'Unknown'],
+ DCNS('subject.type'): [u'Unknown'],
+ DCNS('subject.genre'): [u'Unknown'],
+ DCNS('date'): ['1970-01-01'],
+ DCNS('language'): [WLURI.DEFAULT_LANGUAGE],
+ # DCNS('date'): [creation_date],
+ DCNS('publisher'): [u"Fundacja Nowoczesna Polska"],
+ DCNS('description'):
+ [u"""Publikacja zrealizowana w ramach projektu
+ Wolne Lektury (http://wolnelektury.pl). Reprodukcja cyfrowa
+ wykonana przez Bibliotekę Narodową z egzemplarza
+ pochodzącego ze zbiorów BN."""],
+ DCNS('identifier.url'): [WLURI.example],
+ DCNS('rights'):
+ [u"Domena publiczna - zm. [OPIS STANU PRAWNEGO TEKSTU]"] })
+
+def xinclude_forURI(uri):
+ e = etree.Element(XINS("include"))
+ e.set("href", uri)
+ return etree.tostring(e, encoding=unicode)
+
+def wrap_text(ocrtext, creation_date, bookinfo=DEFAULT_BOOKINFO):
+ """Wrap the text within the minimal XML structure with a DC template."""
+ bookinfo.created_at = creation_date
+
+ dcstring = etree.tostring(bookinfo.to_etree(), \
+ method='xml', encoding=unicode, pretty_print=True)
+
+ return u'<utwor>\n' + dcstring + u'\n<plain-text>\n' + ocrtext + \
+ u'\n</plain-text>\n</utwor>'
+
+
+def serialize_raw(element):
+ b = u'' + (element.text or '')
+
+ for child in element.iterchildren():
+ e = etree.tostring(child, method='xml', encoding=unicode,
+ pretty_print=True)
+ b += e
+
+ return b
+
+SERIALIZERS = {
+ 'raw': serialize_raw,
+}
+
+def serialize_children(element, format='raw'):
+ return SERIALIZERS[format](element)
+
+def get_resource(path):
+ return os.path.join(os.path.dirname(__file__), path)
+
+
+class OutputFile(object):
+ """Represents a file returned by one of the converters."""
+
+ _string = None
+ _filename = None
+
+ def __del__(self):
+ if self._filename:
+ os.unlink(self._filename)
+
+ def __nonzero__(self):
+ return self._string is not None or self._filename is not None
+
+ @classmethod
+ def from_string(cls, string):
+ """Converter returns contents of a file as a string."""
+
+ instance = cls()
+ instance._string = string
+ return instance
+
+ @classmethod
+ def from_filename(cls, filename):
+ """Converter returns contents of a file as a named file."""
+
+ instance = cls()
+ instance._filename = filename
+ return instance
+
+ def get_string(self):
+ """Get file's contents as a string."""
+
+ if self._filename is not None:
+ with open(self._filename) as f:
+ return f.read()
+ else:
+ return self._string
+
+ def get_file(self):
+ """Get file as a file-like object."""
+
+ if self._string is not None:
+ from StringIO import StringIO
+ return StringIO(self._string)
+ elif self._filename is not None:
+ return open(self._filename)
+
+ def get_filename(self):
+ """Get file as a fs path."""
+
+ if self._filename is not None:
+ return self._filename
+ elif self._string is not None:
+ from tempfile import NamedTemporaryFile
+ temp = NamedTemporaryFile(prefix='librarian-', delete=False)
+ temp.write(self._string)
+ temp.close()
+ self._filename = temp.name
+ return self._filename
+ else:
+ return None
+
+ def save_as(self, path):
+ """Save file to a path. Create directories, if necessary."""
+
+ dirname = os.path.dirname(os.path.abspath(path))
+ if not os.path.isdir(dirname):
+ os.makedirs(dirname)
+ shutil.copy(self.get_filename(), path)
fnp / librarian.git / blobdiff