Create named wrapper for database

nullboard.html

@@ -1237,6 +1237,52 @@
       }
    }
 
+   class NamespacedDatabase extends Database {
+      constructor(namespace, database)
+      {
+         super();
+         this.database = database
+         this.namespace = namespace;
+      }
+
+      deprefix(key)
+      {
+         if (key.startsWith(this.namespace + "."))
+            return key.slice(this.namespace.length + 1);
+         return key;
+      }
+
+      prefix(key)
+      {
+         return this.namespace + "." + key;
+      }
+
+      get(key) {
+         var k = this.prefix(key);
+         return this.database.get(k);
+      }
+
+      set(key, value)
+      {
+         var k = this.prefix(key);
+         return this.database.set(k, value);
+      }
+
+      del(key)
+      {
+         var k = this.prefix(key);
+         return this.database.del(k);
+      }
+
+      forEach(foo)
+      {
+         this.database.forEach((key) => {
+            var k = this.deprefix(key);
+            foo(k);
+         });
+      }
+   }
+
    class Local extends Database {
       constructor()
       {
@@ -1275,7 +1321,7 @@
       }
    }
 
-   globalStorage = new Local();
+   globalStorage = new NamespacedDatabase("4", new Local());
 
 	/*
 	 *	poor man's error handling -- $fixme