Switch from Groups to grouping services based on activity UID

1 files changed, 17 insertions, 0 deletions

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
+