feat: add json output for daemon lifecycle

src/cli/daemon-cli/response.ts

@@ -0,0 +1,43 @@
+import { Writable } from "node:stream";
+
+import type { GatewayService } from "../../daemon/service.js";
+import { defaultRuntime } from "../../runtime.js";
+
+export type DaemonAction = "install" | "uninstall" | "start" | "stop" | "restart";
+
+export type DaemonActionResponse = {
+  ok: boolean;
+  action: DaemonAction;
+  result?: string;
+  message?: string;
+  error?: string;
+  hints?: string[];
+  warnings?: string[];
+  service?: {
+    label: string;
+    loaded: boolean;
+    loadedText: string;
+    notLoadedText: string;
+  };
+};
+
+export function emitDaemonActionJson(payload: DaemonActionResponse) {
+  defaultRuntime.log(JSON.stringify(payload, null, 2));
+}
+
+export function buildDaemonServiceSnapshot(service: GatewayService, loaded: boolean) {
+  return {
+    label: service.label,
+    loaded,
+    loadedText: service.loadedText,
+    notLoadedText: service.notLoadedText,
+  };
+}
+
+export function createNullWriter(): Writable {
+  return new Writable({
+    write(_chunk, _encoding, callback) {
+      callback();
+    },
+  });
+}