MCP server at POST /mcp (official SDK, stateless Streamable HTTP) (#11)

src/mesh/fake-bridge.ts

@@ -0,0 +1,80 @@
+import { create, toBinary } from '@bufbuild/protobuf';
+import * as P from '@meshtastic/protobufs';
+import * as net from 'node:net';
+import type { AddressInfo } from 'node:net';
+import { frame } from './codec.js';
+
+/** In-process TCP stand-in for the meshtastic-serial-bridge; hands out accepted sockets. */
+export function startBridge(
+  onSocket?: (s: net.Socket) => void,
+): Promise<{ port: number; sockets: net.Socket[]; close: () => void }> {
+  const sockets: net.Socket[] = [];
+  const server = net.createServer((socket) => {
+    onSocket?.(socket); // attached at accept time, before any data can arrive
+    sockets.push(socket);
+  });
+  return new Promise((resolve) => {
+    server.listen(0, '127.0.0.1', () => {
+      resolve({
+        port: (server.address() as AddressInfo).port,
+        sockets,
+        close: () => server.close(),
+      });
+    });
+  });
+}
+
+export async function waitFor(
+  cond: () => boolean | Promise<boolean>,
+  timeoutMs = 5000,
+): Promise<void> {
+  const t0 = Date.now();
+  while (!(await cond())) {
+    if (Date.now() - t0 > timeoutMs) throw new Error('timed out waiting');
+    await new Promise((r) => setTimeout(r, 10));
+  }
+}
+
+/** Plain-object NodeInfo fields (init shape, not the runtime message type) accepted by nodeInfoFrame. */
+export interface NodeInfoFields {
+  user?: {
+    id?: string;
+    longName?: string;
+    shortName?: string;
+    hwModel?: number;
+  };
+  position?: { latitudeI?: number; longitudeI?: number; altitude?: number };
+  lastHeard?: number;
+  deviceMetrics?: { batteryLevel?: number };
+}
+
+export function nodeInfoFrame(
+  num: number,
+  fields?: NodeInfoFields,
+): Uint8Array {
+  const ni = create(P.Mesh.NodeInfoSchema, { num, ...fields });
+  return frame(
+    toBinary(
+      P.Mesh.FromRadioSchema,
+      create(P.Mesh.FromRadioSchema, {
+        payloadVariant: { case: 'nodeInfo', value: ni },
+      }),
+    ),
+  );
+}
+
+export const KAMIL_NUM = 123456789;
+
+export function kamilNodeInfo(): NodeInfoFields {
+  return {
+    user: {
+      id: '!kamil',
+      longName: 'Kamil SP8MK/P',
+      shortName: 'KK',
+      hwModel: P.Mesh.HardwareModel.TBEAM,
+    },
+    position: { latitudeI: 521049637, longitudeI: 209833152, altitude: 123 },
+    lastHeard: 1758000000,
+    deviceMetrics: { batteryLevel: 87 },
+  };
+}