From d87f1752126ecc0ebac006520b70334abe4c1cab Mon Sep 17 00:00:00 2001
From: Amit Haridas <amit.wh@gmail.com>
Date: Mon, 8 Jun 2026 06:27:13 +0530
Subject: [PATCH] feat(renderer): add updater store mirroring main process
 state

---
 src/renderer/lib/updater-store.ts    | 42 ++++++++++++++++++++++
 tests/unit/lib/updater-store.test.ts | 52 ++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 src/renderer/lib/updater-store.ts
 create mode 100644 tests/unit/lib/updater-store.test.ts

diff --git a/src/renderer/lib/updater-store.ts b/src/renderer/lib/updater-store.ts
new file mode 100644
index 0000000..4b3e60b
--- /dev/null
+++ b/src/renderer/lib/updater-store.ts
@@ -0,0 +1,42 @@
+import { create } from 'zustand';
+import { ipc } from '@/lib/ipc';
+
+type State = 'idle' | 'checking' | 'available' | 'downloading' | 'ready' | 'error';
+
+interface UpdaterState {
+  state: State;
+  version: string | null;
+  percent: number;
+  lastCheckAt: number;
+  applyStatus: (s: { state: State; version?: string; percent?: number; code?: string }) => void;
+  check: () => Promise<void>;
+  install: () => void;
+}
+
+const DEBOUNCE_MS = 60_000;
+
+export const useUpdaterStore = create<UpdaterState>((set, get) => ({
+  state: 'idle',
+  version: null,
+  percent: 0,
+  lastCheckAt: 0,
+  applyStatus: (s) =>
+    set({
+      state: s.state,
+      version: s.version ?? get().version,
+      percent: s.percent ?? get().percent,
+    }),
+  check: async () => {
+    if (Date.now() - get().lastCheckAt < DEBOUNCE_MS) return;
+    set({ lastCheckAt: Date.now() });
+    await ipc.updater.check();
+  },
+  install: () => ipc.updater.install(),
+}));
+
+// Subscribe to live updates from main
+if (typeof window !== 'undefined' && (window as any).electronAPI?.updater?.onStatus) {
+  (window as any).electronAPI.updater.onStatus((payload: any) => {
+    useUpdaterStore.getState().applyStatus(payload);
+  });
+}
diff --git a/tests/unit/lib/updater-store.test.ts b/tests/unit/lib/updater-store.test.ts
new file mode 100644
index 0000000..87d14f4
--- /dev/null
+++ b/tests/unit/lib/updater-store.test.ts
@@ -0,0 +1,52 @@
+import { describe, expect, test, beforeEach, vi } from 'vitest';
+
+vi.mock('@/lib/ipc', () => ({
+  ipc: {
+    updater: {
+      check: vi.fn(),
+      install: vi.fn(),
+      getState: vi.fn().mockResolvedValue({ state: 'idle' }),
+    },
+  },
+}));
+
+import { useUpdaterStore } from '@/lib/updater-store';
+import { ipc } from '@/lib/ipc';
+
+beforeEach(() => {
+  useUpdaterStore.setState({
+    state: 'idle',
+    version: null,
+    percent: 0,
+    lastCheckAt: 0,
+  });
+  vi.clearAllMocks();
+});
+
+describe('useUpdaterStore', () => {
+  test('initial state is idle', () => {
+    expect(useUpdaterStore.getState().state).toBe('idle');
+  });
+
+  test('applyStatus updates state from incoming event', () => {
+    useUpdaterStore.getState().applyStatus({ state: 'available', version: '5.0.2' });
+    expect(useUpdaterStore.getState().state).toBe('available');
+    expect(useUpdaterStore.getState().version).toBe('5.0.2');
+  });
+
+  test('check() debounces within 60s', async () => {
+    useUpdaterStore.setState({ lastCheckAt: Date.now() });
+    await useUpdaterStore.getState().check();
+    expect(ipc.updater.check).not.toHaveBeenCalled();
+  });
+
+  test('check() invokes ipc.updater.check when not debounced', async () => {
+    await useUpdaterStore.getState().check();
+    expect(ipc.updater.check).toHaveBeenCalled();
+  });
+
+  test('install() invokes ipc.updater.install', () => {
+    useUpdaterStore.getState().install();
+    expect(ipc.updater.install).toHaveBeenCalled();
+  });
+});