feat: add req handler

app.ts

@@ -1,13 +1,15 @@
 import { App } from "astal/gtk4";
 import style from "./style.scss";
 import windows from "./windows";
-import GLib from "gi://GLib?version=2.0";
+import GLib from "gi://GLib";
+import { reqHandler } from "./handler";
 
 const icons = `${GLib.get_user_config_dir()}/tpanel/assets/icons`;
 
 App.start({
   css: style,
   icons: icons,
+  requestHandler: reqHandler,
   main() {
     windows.map((win) => App.get_monitors().map(win));
   },

handler.ts

@@ -0,0 +1,14 @@
+import { App } from "astal/gtk4";
+import { WINDOW_NAME } from "./widgets/bar";
+
+export const reqHandler = (req: string, res: (res: any) => void) => {
+  switch (req) {
+    case "toggle-bar":
+      const win = App.get_window(WINDOW_NAME);
+      win?.is_visible() ? win.hide() : win?.set_visible(true);
+      break;
+
+    default:
+      res("uknown command");
+  }
+};