X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/f33381c4b0468544123ff05295033da7cc4bf61f..a7133c06fd9738c11a2bf60b4fc09365d15da1d7:/librarian/parser.py?ds=sidebyside

diff --git a/librarian/parser.py b/librarian/parser.py
index 341eaf8..f02b64c 100644
--- a/librarian/parser.py
+++ b/librarian/parser.py
@@ -3,73 +3,114 @@
 # 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, preserve_lines=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', '')
-
-        if swap_endlines:
-            sub = u'<br/>'
-            if preserve_lines:
-                sub += u'\n'
-            data = cls.LINE_SWAP_EXPR.sub(sub, data)
-
-        try:
-            parser = etree.XMLParser(remove_blank_text=False)
-            return cls(etree.parse(StringIO(data), parser), parse_dublincore=parse_dublincore)
-        except (ExpatError, XMLSyntaxError, XSLTApplyError), e:
-            raise ParseError(e)
+            iofile = IOFile.from_file(xmlfile)
+        return cls(iofile, *args, **kwargs)
+
+
+    def swap_endlines(self):
+        """Converts line breaks in stanzas into <br/> tags."""
+        # only swap inside stanzas
+        for elem in self.edoc.iter('strofa'):
+            for child in list(elem):
+                if child.tail:
+                    chunks = self.LINE_SWAP_EXPR.split(child.tail)
+                    ins_index = elem.index(child) + 1
+                    while len(chunks) > 1:
+                        ins = etree.Element('br')
+                        ins.tail = chunks.pop()
+                        elem.insert(ins_index, ins)
+                    child.tail = chunks.pop(0)
+            if 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
@@ -117,7 +158,7 @@ class WLDocument(object):
                 xpath = self.path_to_xpath(key)
                 node = self.edoc.xpath(xpath)[0]
                 repl = etree.fromstring(u"<%s>%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) ) )
 
@@ -132,3 +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 pdf
+        return pdf.transform(self, *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.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)