Split session daemon from web server

src/server/sessiond.ts

@@ -0,0 +1,28 @@
+import { mkdir, rm } from "node:fs/promises";
+import { dirname } from "node:path";
+import Fastify from "fastify";
+import fastifyWebsocket from "@fastify/websocket";
+import { SessionEventHub } from "./realtime/sessionEventHub.js";
+import { PiSessionService } from "./sessions/piSessionService.js";
+import { registerSessionRoutes } from "./sessions/sessionRoutes.js";
+import { sessiondSocketPath } from "./sessiond/config.js";
+
+const app = Fastify({ logger: true });
+await app.register(fastifyWebsocket);
+
+const eventHub = new SessionEventHub();
+const sessions = new PiSessionService(eventHub);
+await registerSessionRoutes(app, sessions, eventHub);
+
+const port = process.env.PI_WEB_SESSIOND_PORT ? Number(process.env.PI_WEB_SESSIOND_PORT) : undefined;
+const host = process.env.PI_WEB_SESSIOND_HOST ?? "127.0.0.1";
+
+if (port) {
+  await app.listen({ port, host });
+} else {
+  const path = sessiondSocketPath();
+  await mkdir(dirname(path), { recursive: true });
+  await rm(path, { force: true });
+  await app.listen({ path });
+  process.on("exit", () => void rm(path, { force: true }));
+}