add dc:audiences

[librarian.git] / librarian / __init__.py

diff --git a/librarian/__init__.py b/librarian/__init__.py
index 10c3766..5b6981d 100644 (file)
--- a/librarian/__init__.py
+++ b/librarian/__init__.py
@@ -1,16 +1,18 @@
 # -*- 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.  
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+import os
+
 class ParseError(Exception):
-    
-    def __init__(self, cause, message=None):
-        self.cause = cause
-        try:
-            self.message = message or self.cause.message
-        except:
-            self.message = "No message."
+    def __str__(self):
+        """ Dirty workaround for Python Unicode handling problems. """
+        return self.message.message
+
+    def __unicode__(self):
+        """ Dirty workaround for Python Unicode handling problems. """
+        return self.message.message
 
 class ValidationError(Exception):
     pass
@@ -28,7 +30,7 @@ class XMLNamespace(object):
         return '{%s}%s' % (self.uri, tag)
 
     def __contains__(self, tag):
-        return tag.startswith('{'+str(self)+'}')
+        return tag.startswith('{' + str(self) + '}')
 
     def __repr__(self):
         return 'XMLNamespace(%r)' % self.uri
@@ -48,14 +50,43 @@ 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 DocProvider(object):
+    """ Base class for a repository of XML files.
+        Used for generating joined files, like EPUBs
+    """
+
+    def by_slug(self, slug):
+        raise NotImplemented
+
+    def __getitem__(self, slug):
+        return self.by_slug(slug)
+
+    def by_uri(self, uri):
+        return self.by_slug(uri.rsplit('/', 1)[1])
+
+
+class DirDocProvider(DocProvider):
+    """ Serve docs from a directory of files in form <slug>.xml """
+
+    def __init__(self, dir):
+        self.dir = dir
+        self.files = {}
+
+    def by_slug(self, slug):
+        return open(os.path.join(self.dir, '%s.xml' % slug))
+
+
 import lxml.etree as etree
 import dcparser
 
 DEFAULT_BOOKINFO = dcparser.BookInfo(
-        { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'},\
+        { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'}, \
         { DCNS('creator'): [u'Some, Author'],
           DCNS('title'): [u'Some Title'],
           DCNS('subject.period'): [u'Unknown'],
@@ -75,18 +106,18 @@ DEFAULT_BOOKINFO = dcparser.BookInfo(
             [u"Domena publiczna - zm. [OPIS STANU PRAWNEGO TEKSTU]"] })
 
 def xinclude_forURI(uri):
-    e = etree.Element( XINS("include") )
+    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(),\
+
+    dcstring = etree.tostring(bookinfo.to_etree(), \
         method='xml', encoding=unicode, pretty_print=True)
 
-    return u'<utwor>\n' + dcstring + u'\n<plain-text>\n' + ocrtext +\
+    return u'<utwor>\n' + dcstring + u'\n<plain-text>\n' + ocrtext + \
         u'\n</plain-text>\n</utwor>';
 
 
@@ -105,3 +136,7 @@ SERIALIZERS = {
 
 def serialize_children(element, format='raw'):
     return SERIALIZERS[format](element)
+
+def get_resource(path):
+    return os.path.join(os.path.dirname(__file__), path)
+