Add fake update feature

Author: faassen

CHANGELOG.md

@@ -11,6 +11,9 @@ release date when you use `npm version` (see `README.md`).
 
 - Add a timestamp to messages.
 
+- Add a `fake-update` endpoint to the backend. This can be used to send fake
+  delta-chat client generated updates. There is no UI yet.
+
 ## [0.15.1][] - 2022-07-04
 
 ### Fixed

backend/app.ts

@@ -69,13 +69,22 @@ export function createFrontend(
       color: instance.color,
     });
   });
-  app.post<{}, {}>("/clear", (req, res) => {
+  app.post<{}, { status: string }>("/clear", (req, res) => {
     instances.clear();
     res.json({
       status: "ok",
     });
   });
 
+  app.post<any, { status: string }>("/fake-update", (req, res) => {
+    const instanceId = Array.from(instances.instances.keys())[0];
+    const instance = instances.instances.get(instanceId);
+    instance?.webXdc.sendUpdate({ payload: req.body }, "fake update");
+    res.json({
+      status: "ok",
+    });
+  });
+
   app.ws("/webxdc-message", (ws, req) => {
     instances.onMessage((message) => {
       ws.send(JSON.stringify(message));