Adding support to persist variables in Redis

back/src/Services/Repository/VoidVariablesRepository.ts

@@ -0,0 +1,14 @@
+import { VariablesRepositoryInterface } from "./VariablesRepositoryInterface";
+
+/**
+ * Mock class in charge of NOT saving/loading variables from the data store
+ */
+export class VoidVariablesRepository implements VariablesRepositoryInterface {
+    loadVariables(roomUrl: string): Promise<{ [key: string]: string }> {
+        return Promise.resolve({});
+    }
+
+    saveVariable(roomUrl: string, key: string, value: string): Promise<number> {
+        return Promise.resolve(0);
+    }
+}