New file, utility routines.

LDP/lampadas/Lampadas/cmf_types/utils.py

@@ -0,0 +1,37 @@
+#!/usr/bin/python
+
+import string
+
+LABEL_ORDER = ['folder contents', 'contents', 'view', 'edit', 'local roles', 'properties', 'state']
+
+def unique_options(a_sequence):
+    """Eliminates duplicate items in manage_options tuples,
+       and canonicalizes their order."""
+
+    # Turn the tuple of dictionaries into a single dictionary
+    # indexed by the uppercased label.
+    a_list = list(a_sequence)
+    dict = {}
+    for action in a_list:
+        label = action['label']
+        dict[string.upper(label)] = action
+
+    # Move the dictionary items into the result set
+    # in the same order as they appear in LABEL_ORDER.
+    results = []
+    for label in LABEL_ORDER:
+        uc_label = string.upper(label)
+        if dict.has_key(uc_label):
+            results.append(dict[uc_label])
+            del dict[uc_label]
+
+    # Append any remaining items to the result set.
+    for key in dict.keys():
+        item = dict[key]
+        results.append(item)
+
+    # Turn it back into a tuple before returning.
+    results = tuple(results)
+    print 'results: ', results
+    return results
+