Proversity/hide global message (openedx#693)

* ENH: hiding global message behind a flag, global shows all unless microsite is off

common/djangoapps/status/status.py

@@ -3,7 +3,8 @@
 """
 
 import logging
-
+from openedx.core.djangoapps.site_configuration import helpers as configuration_helpers
+from django.conf import settings
 from .models import GlobalStatusMessage
 
 log = logging.getLogger(__name__)
@@ -15,14 +16,16 @@ def get_site_status_msg(course_key):
 
     Caches the message by course.
     """
-    try:
-        # The current() value for GlobalStatusMessage is cached.
-        if not GlobalStatusMessage.current().enabled:
-            return None
+    must_show_message = configuration_helpers.get_value('show_global_message', settings.SHOW_GLOBAL_MESSAGE)
+    if must_show_message:
+        try:
+            # The current() value for GlobalStatusMessage is cached.
+            if not GlobalStatusMessage.current().enabled:
+                return None
 
-        return GlobalStatusMessage.current().full_message(course_key)
-    # Make as general as possible, because something broken here should not
-    # bring down the whole site.
-    except:  # pylint: disable=bare-except
-        log.exception("Error while getting a status message.")
-        return None
+            return GlobalStatusMessage.current().full_message(course_key)
+        # Make as general as possible, because something broken here should not
+        # bring down the whole site.
+        except:  # pylint: disable=bare-except
+            log.exception("Error while getting a GlobalStatusMessage")
+            return None

lms/envs/aws.py

@@ -1147,3 +1147,6 @@
 ########################## Derive Any Derived Settings  #######################
 
 derive_settings(__name__)
+
+########################## Derive Any Derived Settings  #######################
+SHOW_GLOBAL_MESSAGE = ENV_TOKENS.get('SHOW_GLOBAL_MESSAGE', False)

lms/envs/devstack.py

@@ -10,7 +10,7 @@
 MEDIA_ROOT = "/edx/var/edxapp/uploads"
 ORA2_FILEUPLOAD_BACKEND = 'django'
 
-
+SHOW_GLOBAL_MESSAGE = False
 DEBUG = True
 USE_I18N = True
 DEFAULT_TEMPLATE_ENGINE['OPTIONS']['debug'] = True