Studio support for cohorted courseware

TNL-652

cms/djangoapps/contentstore/utils.py

@@ -179,6 +179,36 @@ def is_currently_visible_to_students(xblock):
     return True
 
 
+def has_children_visible_to_specific_content_groups(xblock):
+    """
+    Returns True if this xblock has children that are limited to specific content groups.
+    Note that this method is not recursive (it does not check grandchildren).
+    """
+    if not xblock.has_children:
+        return False
+
+    for child in xblock.get_children():
+        if is_visible_to_specific_content_groups(child):
+            return True
+
+    return False
+
+
+def is_visible_to_specific_content_groups(xblock):
+    """
+    Returns True if this xblock has visibility limited to specific content groups.
+    """
+    if not xblock.group_access:
+        return False
+    for __, value in xblock.group_access.iteritems():
+        # value should be a list of group IDs. If it is an empty list or None, the xblock is visible
+        # to all groups in that particular partition. So if value is a truthy value, the xblock is
+        # restricted in some way.
+        if value:
+            return True
+    return False
+
+
 def find_release_date_source(xblock):
     """
     Finds the ancestor of xblock that set its release date.