Refactor proxy codebase

apps/yaak-proxy/lib/rpc.ts

@@ -0,0 +1,24 @@
+import { invoke } from '@tauri-apps/api/core';
+import { listen as tauriListen } from '@tauri-apps/api/event';
+import type { RpcEventSchema, RpcSchema } from '@yaakapp-internal/proxy-lib';
+
+export type Req<K extends keyof RpcSchema> = RpcSchema[K][0];
+export type Res<K extends keyof RpcSchema> = RpcSchema[K][1];
+
+export async function rpc<K extends keyof RpcSchema>(cmd: K, payload: Req<K>): Promise<Res<K>> {
+  return invoke('rpc', { cmd, payload }) as Promise<Res<K>>;
+}
+
+/** Subscribe to a backend event. Returns an unsubscribe function. */
+export function listen<K extends keyof RpcEventSchema>(
+  event: K & string,
+  callback: (payload: RpcEventSchema[K]) => void,
+): () => void {
+  let unsub: (() => void) | null = null;
+  tauriListen<RpcEventSchema[K]>(event, (e) => callback(e.payload))
+    .then((fn) => {
+      unsub = fn;
+    })
+    .catch(console.error);
+  return () => unsub?.();
+}