--- a/app/soc/logic/cleaning.py	Thu Sep 03 12:46:07 2009 +0530
+++ b/app/soc/logic/cleaning.py	Fri Sep 04 22:35:13 2009 +0200
@@ -791,3 +791,28 @@
   if not has_access(rights, access_level, scope_path, prefix):
     self._errors[field] = ErrorList([DEF_NO_RIGHTS_FOR_ACL_MSG])
     del self.cleaned_data[field]
+
+
+def str2set(string_field):
+  """Clean method for cleaning comma separated strings.
+
+  Obtains the comma separated string from the form and returns it as
+  a set of strings.
+  """
+
+  def wrapper(self):
+    """Decorator wrapper method.
+    """
+    cleaned_data = self.cleaned_data
+
+    string_data = cleaned_data.get(string_field)
+
+    list_data = []
+    for string in string_data.split(','):
+      string_strip = string.strip()
+      if string_strip and string_strip not in list_data:
+        list_data.append(string_strip)
+
+    return list_data
+
+  return wrapper