From 1cdaf97f20e84ea9cb80e97708f10627e24b6988 Mon Sep 17 00:00:00 2001
From: Dan Williams <dcbw@redhat.com>
Date: Wed, 14 Jun 2006 18:42:44 +0000
Subject: Switch from Groups to grouping services based on activity UID

---
(limited to 'sugar/util.py')

diff --git a/sugar/util.py b/sugar/util.py
index 9c15edb..6f70495 100644
--- a/sugar/util.py
+++ b/sugar/util.py
@@ -19,3 +19,20 @@ def _sha_data(data):
 def unique_id(data = ''):
 	data_string = "%s%s%s" % (time.time(), random.randint(10000, 100000), data)
 	return _stringify_sha(_sha_data(data_string))
+
+
+ACTIVITY_UID_LEN = 40
+
+def is_hex(s):
+	return s.strip(string.hexdigits) == ''	
+
+def validate_activity_uid(uid):
+	"""Validate an activity UID."""
+	if type(uid) != type(""):
+		return False
+	if len(uid) != ACTIVITY_UID_LEN:
+		return False
+	if not is_hex(uid):
+		return False
+	return True
+
--
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