feat: Main to renderer store synchronization

Patches are send in one direction only, from the main to the renderer,
so all actions have to go through the context bridge and the renderer
IPC to modify the store in the renderer. This makes the store in the
main process a single source of truth, which simplifies debugging and
state persistence.

The store in the renderer is connected to redux devtools for inspection,
but playing back the state in the devtools won't change the sotre in
main process.

1 files changed, 32 insertions, 34 deletions

diff --git a/packages/main/src/index.ts b/packages/main/src/index.ts
index cd04276..dbe6890 100644
--- a/packages/main/src/index.ts
+++ b/packages/main/src/index.ts
@@ -1,8 +1,18 @@
 import { app, BrowserWindow } from 'electron';
+import { getSnapshot, onPatch } from 'mobx-state-tree';
 import { join } from 'path';
-import { RendererIpcMessage } from '@sophie/shared';
+import {
+  MainToRendererIpcMessage,
+  RendererToMainIpcMessage,
+} from '@sophie/shared';
 import { URL } from 'url';
 
+import {
+  installDevToolsExtensions,
+  openDevToolsWhenReady,
+} from './devTools';
+import { rootStore } from './stores/RootStore';
+
 const isSingleInstance = app.requestSingleInstanceLock();
 const isDevelopment = import.meta.env.MODE === 'development';
 
@@ -14,62 +24,46 @@ if (!isSingleInstance) {
 app.enableSandbox();
 
 if (isDevelopment) {
-  app.whenReady().then(async () => {
-    const {
-      default: installExtension,
-      MOBX_DEVTOOLS,
-      REACT_DEVELOPER_TOOLS,
-    } = await import('electron-devtools-installer');
-    installExtension(
-      [
-        MOBX_DEVTOOLS,
-        REACT_DEVELOPER_TOOLS,
-      ],
-      {
-        forceDownload: false,
-        loadExtensionOptions: {
-          allowFileAccess: true,
-        },
-      },
-    );
-  }).catch((err) => {
-    console.error('Failed to install devtools extension', err);
-  });
+  installDevToolsExtensions(app);
 }
 
 let mainWindow: BrowserWindow | null = null;
 
+const store = rootStore.create({
+  shared: {
+    clickCount: 1,
+  },
+});
+
 function createWindow(): Promise<void> {
   mainWindow = new BrowserWindow({
     show: false,
+    autoHideMenuBar: true,
     webPreferences: {
       nativeWindowOpen: true,
       webviewTag: false,
       sandbox: true,
       preload: join(__dirname, '../../preload/dist/index.cjs'),
-    }
+    },
   });
 
-  const { webContents } = mainWindow;
-
-  // See https://github.com/MarshallOfSound/electron-devtools-installer/issues/195#issuecomment-998872878
   if (isDevelopment) {
-    webContents.once('dom-ready', () => {
-      webContents.once('devtools-opened', () => {
-        mainWindow?.focus();
-      });
-      webContents.openDevTools();
-    });
+    openDevToolsWhenReady(mainWindow);
   }
 
   mainWindow.on('ready-to-show', () => {
     mainWindow?.show();
   });
 
+  const { webContents } = mainWindow;
+
   webContents.on('ipc-message', (_event, channel, ...args) => {
     switch (channel) {
-      case RendererIpcMessage.ButtonClicked:
-        console.log('Button clicked');
+      case RendererToMainIpcMessage.SharedStoreSnapshotRequest:
+        webContents.send(MainToRendererIpcMessage.SharedStoreSnapshot, getSnapshot(store.shared));
+        break;
+      case RendererToMainIpcMessage.ButtonClick:
+        store.buttonClick();
         break;
       default:
         console.warn('Unknown IPC message:', channel, args);
@@ -77,6 +71,10 @@ function createWindow(): Promise<void> {
     }
   });
 
+  onPatch(store.shared, (patch) => {
+    webContents.send(MainToRendererIpcMessage.SharedStorePatch, patch);
+  });
+
   const pageUrl = (isDevelopment && import.meta.env.VITE_DEV_SERVER_URL !== undefined)
     ? import.meta.env.VITE_DEV_SERVER_URL
     : new URL('../renderer/dist/index.html', `file://${__dirname}`).toString();