start of react migration

electron-ui/src/main/preload.ts

@@ -0,0 +1,32 @@
+// Disable no-unused-vars, broken for spread args
+/* eslint no-unused-vars: off */
+import { contextBridge, ipcRenderer, IpcRendererEvent } from 'electron';
+
+export type Channels = 'ipc-example';
+
+const electronHandler = {
+  ipcRenderer: {
+    sendMessage(channel: Channels, ...args: unknown[]) {
+      ipcRenderer.send(channel, ...args);
+    },
+    on(channel: Channels, func: (...args: unknown[]) => void) {
+      const subscription = (_event: IpcRendererEvent, ...args: unknown[]) =>
+        func(...args);
+      ipcRenderer.on(channel, subscription);
+
+      return () => {
+        ipcRenderer.removeListener(channel, subscription);
+      };
+    },
+    once(channel: Channels, func: (...args: unknown[]) => void) {
+      ipcRenderer.once(channel, (_event, ...args) => func(...args));
+    },
+
+    loadAudioBuffer: (filePath: string) =>
+      ipcRenderer.invoke('load-audio-buffer', filePath),
+  },
+};
+
+contextBridge.exposeInMainWorld('electron', electronHandler);
+
+export type ElectronHandler = typeof electronHandler;