X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/fec62da2886e29aa0a9233e13fd9cae0ca6076bf..724310b910f3ec0aeb2a1fbd0189d5f588a00f8f:/librarian/parser.py diff --git a/librarian/parser.py b/librarian/parser.py index afc4f1a..fb2f986 100644 --- a/librarian/parser.py +++ b/librarian/parser.py @@ -3,80 +3,92 @@ # This file is part of Librarian, licensed under GNU Affero GPLv3 or later. # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # -from librarian import ValidationError, NoDublinCore, ParseError -from librarian import RDFNS +from librarian import ValidationError, NoDublinCore, ParseError, NoProvider +from librarian import RDFNS, IOFile from librarian import dcparser from xml.parsers.expat import ExpatError from lxml import etree from lxml.etree import XMLSyntaxError, XSLTApplyError +import os import re from StringIO import StringIO class WLDocument(object): - LINE_SWAP_EXPR = re.compile(r'/\s', re.MULTILINE | re.UNICODE); - - def __init__(self, edoc, parse_dublincore=True): - self.edoc = edoc - - root_elem = edoc.getroot() - - dc_path = './/' + RDFNS('RDF') + LINE_SWAP_EXPR = re.compile(r'/\s', re.MULTILINE | re.UNICODE) + provider = None + + _edoc = None + @property + def edoc(self): + if self._edoc is None: + data = self.source.get_string() + if not isinstance(data, unicode): + data = data.decode('utf-8') + data = data.replace(u'\ufeff', '') + try: + parser = etree.XMLParser(remove_blank_text=False) + self._edoc = etree.parse(StringIO(data.encode('utf-8')), parser) + except (ExpatError, XMLSyntaxError, XSLTApplyError), e: + raise ParseError(e) + return self._edoc + + _rdf_elem = None + @property + def rdf_elem(self): + if self._rdf_elem is None: + dc_path = './/' + RDFNS('RDF') + self._rdf_elem = self.edoc.getroot().find(dc_path) + if self._rdf_elem is None: + raise NoDublinCore('Document has no DublinCore - which is required.') + return self._rdf_elem - if root_elem.tag != 'utwor': + _book_info = None + @property + def book_info(self): + if not self.parse_dublincore: + return None + if self._book_info is None: + self._book_info = dcparser.BookInfo.from_element( + self.rdf_elem, fallbacks=self.meta_fallbacks, strict=self.strict) + return self._book_info + + def __init__(self, iofile, provider=None, + parse_dublincore=True, # shouldn't it be in a subclass? + strict=False, # ? + meta_fallbacks=None # ? + ): + self.source = iofile + self.provider = provider + self.parse_dublincore = parse_dublincore + self.strict = strict + self.meta_fallbacks = meta_fallbacks + if self.edoc.getroot().tag != 'utwor': raise ValidationError("Invalid root element. Found '%s', should be 'utwor'" % root_elem.tag) - if parse_dublincore: - self.rdf_elem = root_elem.find(dc_path) - - if self.rdf_elem is None: - raise NoDublinCore('Document has no DublinCore - which is required.') - - self.book_info = dcparser.BookInfo.from_element(self.rdf_elem) - else: - self.book_info = None + self.book_info @classmethod def from_string(cls, xml, *args, **kwargs): - return cls.from_file(StringIO(xml), *args, **kwargs) + return cls(IOFile.from_string(xml), *args, **kwargs) @classmethod - def from_file(cls, xmlfile, swap_endlines=False, parse_dublincore=True): - - # first, prepare for parsing + def from_file(cls, xmlfile, *args, **kwargs): if isinstance(xmlfile, basestring): - file = open(xmlfile, 'rb') - try: - data = file.read() - finally: - file.close() + iofile = IOFile.from_filename(xmlfile) else: - data = xmlfile.read() - - if not isinstance(data, unicode): - data = data.decode('utf-8') - - data = data.replace(u'\ufeff', '') - - try: - parser = etree.XMLParser(remove_blank_text=False) - tree = etree.parse(StringIO(data.encode('utf-8')), parser) - - if swap_endlines: - cls.swap_endlines(tree) + iofile = IOFile.from_file(xmlfile) + return cls(iofile, *args, **kwargs) - return cls(tree, parse_dublincore=parse_dublincore) - except (ExpatError, XMLSyntaxError, XSLTApplyError), e: - raise ParseError(e) - @classmethod - def swap_endlines(cls, tree): + def swap_endlines(self): + """Converts line breaks in stanzas into
tags.""" # only swap inside stanzas - for elem in tree.iter('strofa'): + for elem in self.edoc.iter('strofa'): for child in list(elem): if child.tail: - chunks = cls.LINE_SWAP_EXPR.split(child.tail) + chunks = self.LINE_SWAP_EXPR.split(child.tail) ins_index = elem.index(child) + 1 while len(chunks) > 1: ins = etree.Element('br') @@ -84,13 +96,22 @@ class WLDocument(object): elem.insert(ins_index, ins) child.tail = chunks.pop(0) if elem.text: - chunks = cls.LINE_SWAP_EXPR.split(elem.text) + chunks = self.LINE_SWAP_EXPR.split(elem.text) while len(chunks) > 1: ins = etree.Element('br') ins.tail = chunks.pop() elem.insert(0, ins) elem.text = chunks.pop(0) + def parts(self): + if self.book_info is None: + raise NoDublinCore('No Dublin Core in document.') + if self.book_info.parts and self.provider is None: + raise NoProvider('No document provider supplied.') + for part_uri in self.book_info.parts: + yield self.from_file(self.provider.by_uri(part_uri), + provider=self.provider) + def chunk(self, path): # convert the path to XPath expr = self.path_to_xpath(path) @@ -137,7 +158,7 @@ class WLDocument(object): xpath = self.path_to_xpath(key) node = self.edoc.xpath(xpath)[0] repl = etree.fromstring(u"<%s>%s" %(node.tag, data, node.tag) ) - node.getparent().replace(node, repl); + node.getparent().replace(node, repl) except Exception, e: unmerged.append( repr( (key, xpath, e) ) ) @@ -152,3 +173,66 @@ class WLDocument(object): node.clear() node.tag = 'span' node.tail = tail + + def editors(self): + """Returns a set of all editors for book and its children. + + :returns: set of dcparser.Person objects + """ + if self.book_info is None: + raise NoDublinCore('No Dublin Core in document.') + persons = set(self.book_info.editors + + self.book_info.technical_editors) + for child in self.parts(): + persons.update(child.editors()) + if None in persons: + persons.remove(None) + return persons + + # Converters + + def as_html(self, *args, **kwargs): + from librarian import pyhtml as html + return html.transform(self, *args, **kwargs) + + def as_text(self, *args, **kwargs): + from librarian import text + return text.transform(self, *args, **kwargs) + + def as_epub(self, *args, **kwargs): + from librarian import epub + return epub.transform(self, *args, **kwargs) + + def as_pdf(self, *args, **kwargs): + from librarian import pypdf + return pypdf.EduModulePDFFormat(self).build(*args, **kwargs) + + def as_mobi(self, *args, **kwargs): + from librarian import mobi + return mobi.transform(self, *args, **kwargs) + + def as_fb2(self, *args, **kwargs): + from librarian import fb2 + return fb2.transform(self, *args, **kwargs) + + def as_cover(self, cover_class=None, *args, **kwargs): + if cover_class is None: + from librarian.styles.wolnelektury.cover import WLCover + cover_class = WLCover + return cover_class(self.book_info, *args, **kwargs).output_file() + + def save_output_file(self, output_file, output_path=None, + output_dir_path=None, make_author_dir=False, ext=None): + if output_dir_path: + save_path = output_dir_path + if make_author_dir: + save_path = os.path.join(save_path, + unicode(self.book_info.author).encode('utf-8')) + save_path = os.path.join(save_path, + self.book_info.uri.slug) + if ext: + save_path += '.%s' % ext + else: + save_path = output_path + + output_file.save_as(save_path)