Add sponsor logos.

[librarian.git] / librarian / __init__.py

diff --git a/librarian/__init__.py b/librarian/__init__.py
index dd09ce4..9b05fb5 100644 (file)
--- a/librarian/__init__.py
+++ b/librarian/__init__.py
@@ -8,24 +8,38 @@ from __future__ import with_statement
 import os
 import re
 import shutil
+import urllib
 
-class ParseError(Exception):
+
+class UnicodeException(Exception):
     def __str__(self):
         """ Dirty workaround for Python Unicode handling problems. """
-        return self.message
+        return unicode(self).encode('utf-8')
 
     def __unicode__(self):
         """ Dirty workaround for Python Unicode handling problems. """
-        return self.message
+        args = self.args[0] if len(self.args) == 1 else self.args
+        try:
+            message = unicode(args)
+        except UnicodeDecodeError:
+            message = unicode(args, encoding='utf-8', errors='ignore')
+        return message
+
+class ParseError(UnicodeException):
+    pass
 
-class ValidationError(Exception):
+class ValidationError(UnicodeException):
     pass
 
 class NoDublinCore(ValidationError):
     """There's no DublinCore section, and it's required."""
     pass
 
-class NoProvider(Exception):
+class NoProvider(UnicodeException):
+    """There's no DocProvider specified, and it's needed."""
+    pass
+
+class NoSponsorProvider(UnicodeException):
     """There's no DocProvider specified, and it's needed."""
     pass
 
@@ -70,7 +84,7 @@ class WLURI(object):
     slug = None
 
     example = 'http://wolnelektury.pl/katalog/lektura/template/'
-    _re_wl_uri = re.compile('http://wolnelektury.pl/katalog/lektura/'
+    _re_wl_uri = re.compile(r'http://(www\.)?wolnelektury.pl/katalog/lektura/'
             '(?P<slug>[-a-z0-9]+)/?$')
 
     def __init__(self, uri):
@@ -82,8 +96,8 @@ class WLURI(object):
     def strict(cls, uri):
         match = cls._re_wl_uri.match(uri)
         if not match:
-            raise ValueError('Supplied URI (%s) does not match '
-                'the template: %s.' % (uri, cls._re_wl_uri))
+            raise ValidationError(u'Invalid URI (%s). Should match: %s' % (
+                        uri, cls._re_wl_uri.pattern))
         return cls(uri)
 
     @classmethod
@@ -134,6 +148,26 @@ class DirDocProvider(DocProvider):
         fname = slug + '.xml'
         return open(os.path.join(self.dir, fname))
 
+class SponsorProvider(object):
+    class NoLogo(UnicodeException): pass
+
+    def by_name(self, name):
+        raise NotImplementedError
+
+class DirSponsorProvider(SponsorProvider):
+    exts = ["png", "jpg", "jpeg", "gif"]
+
+    def __init__(self, dir_):
+        self.dir = dir_
+
+    def by_name(self, name):
+        base = name.replace("/", "_")
+        fnames = ["%s.%s" % (base, ext) for ext in self.exts]
+        for fname in fnames:
+            fpath = os.path.join(self.dir, fname)
+            if os.path.exists(fpath):
+                return OutputFile.from_filename(fpath)
+        raise self.NoLogo('Missing sponsor logo: "%s.[%s]"' % (base, ",".join(self.exts)))
 
 import lxml.etree as etree
 import dcparser
@@ -264,3 +298,8 @@ class OutputFile(object):
         if not os.path.isdir(dirname):
             os.makedirs(dirname)
         shutil.copy(self.get_filename(), path)
+
+
+class URLOpener(urllib.FancyURLopener):
+    version = 'FNP Librarian (http://github.com/fnp/librarian)'
+urllib._urlopener = URLOpener()