server side WIP - saving encrypted note now works, changing terminology of "encrypted note" to "protected note"

services/request_context.js

@@ -0,0 +1,25 @@
+"use strict";
+
+const protected_session = require('./protected_session');
+
+module.exports = function(req) {
+    const browserId = req.headers['x-browser-id'];
+
+    function isProtectedSessionAvailable() {
+        return protected_session.isProtectedSessionAvailable(req);
+    }
+
+    function getDataKey() {
+        if (!isProtectedSessionAvailable()) {
+            throw new Error("Protected session is not available");
+        }
+
+        return protected_session.getDataKey(req);
+    }
+
+    return {
+        browserId,
+        isProtectedSessionAvailable,
+        getDataKey
+    };
+};