X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/ed6b9876b7abff0b2dc6266d6f769c319f358a9c..81101c996edfb9d8aea2fd96b981e393d7198908:/philo/contrib/sobol/utils.py

diff --git a/philo/contrib/sobol/utils.py b/philo/contrib/sobol/utils.py
index 3c5e537..6fd5a49 100644
--- a/philo/contrib/sobol/utils.py
+++ b/philo/contrib/sobol/utils.py
@@ -1,8 +1,9 @@
+from hashlib import sha1
+
 from django.conf import settings
 from django.http import QueryDict
 from django.utils.encoding import smart_str
 from django.utils.http import urlquote_plus, urlquote
-from hashlib import sha1
 
 
 SEARCH_ARG_GET_KEY = 'q'
@@ -11,22 +12,40 @@ HASH_REDIRECT_GET_KEY = 's'
 
 
 def make_redirect_hash(search_arg, url):
+	"""Hashes a redirect for a ``search_arg`` and ``url`` to avoid providing a simple URL spoofing service."""
 	return sha1(smart_str(search_arg + url + settings.SECRET_KEY)).hexdigest()[::2]
 
 
 def check_redirect_hash(hash, search_arg, url):
+	"""Checks whether a hash is valid for a given ``search_arg`` and ``url``."""
 	return hash == make_redirect_hash(search_arg, url)
 
 
 def make_tracking_querydict(search_arg, url):
-	"""
-	Returns a QueryDict instance containing the information necessary
-	for tracking clicks of this url.
-	
-	NOTE: will this kind of initialization handle quoting correctly?
-	"""
+	"""Returns a :class:`QueryDict` instance containing the information necessary for tracking :class:`.Click`\ s on the ``url``."""
 	return QueryDict("%s=%s&%s=%s&%s=%s" % (
 		SEARCH_ARG_GET_KEY, urlquote_plus(search_arg),
  		URL_REDIRECT_GET_KEY, urlquote(url),
 		HASH_REDIRECT_GET_KEY, make_redirect_hash(search_arg, url))
-	)
\ No newline at end of file
+	)
+
+
+class RegistryIterator(object):
+	def __init__(self, registry, iterattr='__iter__', transform=lambda x:x):
+		if not hasattr(registry, iterattr):
+			raise AttributeError("Registry has no attribute %s" % iterattr)
+		self.registry = registry
+		self.iterattr = iterattr
+		self.transform = transform
+	
+	def __iter__(self):
+		return self
+	
+	def next(self):
+		if not hasattr(self, '_iter'):
+			self._iter = getattr(self.registry, self.iterattr)()
+		
+		return self.transform(self._iter.next())
+	
+	def copy(self):
+		return self.__class__(self.registry, self.iterattr, self.transform)
\ No newline at end of file