vpython
diff --git a/‎src/db_translate.py‎
Lines changed: 49 additions & 0 deletions b/‎src/db_translate.py‎
Lines changed: 49 additions & 0 deletions
diff --git a/‎src/mongo_models.py‎
Lines changed: 7 additions & 1 deletion b/‎src/mongo_models.py‎
Lines changed: 7 additions & 1 deletion
@@ -72,6 +72,21 @@ def delete_program(self, program_obj):
     def set_datetime(self, obj, dt):
         pass
 
+    @abc.abstractmethod
+    def count_users(self):
+        """Return the current number of User records."""
+        pass
+
+    @abc.abstractmethod
+    def get_setting(self, key):
+        """Return the value string for the given setting key, or None if not set."""
+        pass
+
+    @abc.abstractmethod
+    def set_setting(self, key, value):
+        """Persist value string for the given setting key (upsert)."""
+        pass
+
 
 class NDB_DBGlue(DBGlue):
 
@@ -138,6 +153,22 @@ def delete_program(self, program_obj):
     def set_datetime(self, obj, dt):
         obj.datetime = dt
 
+    def count_users(self):
+        return ndb_models.User.query().count()
+
+    def get_setting(self, key):
+        setting = ndb_models.ndb.Key('Setting', key).get()
+        if not setting or setting.value == 'NOT SET':
+            return None
+        return setting.value
+
+    def set_setting(self, key, value):
+        setting = ndb_models.ndb.Key('Setting', key).get()
+        if not setting:
+            setting = ndb_models.Setting(id=key)
+        setting.value = value
+        setting.put()
+
 
 class MONGO_DBGlue(DBGlue):
 
@@ -216,6 +247,24 @@ def delete_program(self, program_obj):
     def set_datetime(self, obj, dt):
         obj.date_time = dt
 
+    def count_users(self):
+        return self.client.gldb['User'].count_documents({})
+
+    def get_setting(self, key):
+        setting = mongo_models.Setting.find({"key": key}).first_or_none()
+        if not setting or setting.value == 'NOT SET':
+            return None
+        return setting.value
+
+    def set_setting(self, key, value):
+        setting = mongo_models.Setting.find({"key": key}).first_or_none()
+        if setting is None:
+            setting = mongo_models.Setting(key=key, value=value)
+        else:
+            setting.value = value
+        setting.save()
+
+
 def setupDB():
     """ If MONGO_URL is set, use MongoDB, otherwise use NDB """
     if MONGO_URL:
 
@@ -10,7 +10,7 @@
 def init_client(MONGO_URL):
     # Wrap the app in middleware.
     client =  MongoClient(MONGO_URL)
-    init_bunnet(database=client.gldb, document_models=[User, Folder, Program])
+    init_bunnet(database=client.gldb, document_models=[User, Folder, Program, Setting])
     return client
 
 class User(Document):
@@ -55,3 +55,9 @@ def datetime(self):
     def datetime(self, value):
         self.date_time = value
 
+
+class Setting(Document):
+    """Key-value settings store"""
+    key: Indexed(str, unique=True)
+    value: str = 'NOT SET'
+