X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/5938bc78f11ebad067eae86f51b4f5243003f946..f8442984a021793164661a54ec84ae9caaf9862b:/librarian/__init__.py

diff --git a/librarian/__init__.py b/librarian/__init__.py
index 8977c30..5b6981d 100644
--- a/librarian/__init__.py
+++ b/librarian/__init__.py
@@ -3,8 +3,16 @@
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+import os
+
 class ParseError(Exception):
-    pass
+    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
@@ -42,9 +50,38 @@ 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
 
@@ -99,3 +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)
+