add publication dates, last change date

[prawokultury.git] / prawokultury / helpers.py

diff --git a/prawokultury/helpers.py b/prawokultury/helpers.py
index aa8e3dd..5877e0b 100644 (file)
--- a/prawokultury/helpers.py
+++ b/prawokultury/helpers.py
@@ -2,6 +2,7 @@
 # This file is part of PrawoKultury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+from django.conf import settings
 from textile import Textile
 
 
@@ -22,7 +23,6 @@ def textile_restricted_pl(text):
                         text, rel='nofollow')
 
 
-
 class LazyUGettextLazy():
     """You can use it to internationalize strings in settings.
 
@@ -40,3 +40,27 @@ class LazyUGettextLazy():
             LazyUGettextLazy._ = staticmethod(ugettext_lazy)
             LazyUGettextLazy.real = True
         return unicode(self._(self.text))
+
+
+class AppSettings(object):
+    """Allows specyfying custom settings for an app, with default values.
+
+    Just subclass, set some properties and instantiate with a prefix.
+    Getting a SETTING from an instance will check for prefix_SETTING
+    in project settings if set, else take the default. The value will be
+    then filtered through _more_SETTING method, if there is one.
+
+    """
+    def __init__(self, prefix):
+        self._prefix = prefix
+
+    def __getattribute__(self, name):
+        if name.startswith('_'):
+            return object.__getattribute__(self, name)
+        value = getattr(settings,
+                         "%s_%s" % (self._prefix, name),
+                         object.__getattribute__(self, name))
+        more = "_more_%s" % name
+        if hasattr(self, more):
+            value = getattr(self, more)(value)
+        return value