feat: add ipcRenderer.invoke() (#18449)

lib/browser/api/ipc-main.ts

@@ -1,8 +1,40 @@
 import { EventEmitter } from 'events'
+import { IpcMainInvokeEvent } from 'electron'
 
-const emitter = new EventEmitter()
+class IpcMain extends EventEmitter {
+  private _invokeHandlers: Map<string, (e: IpcMainInvokeEvent, ...args: any[]) => void> = new Map();
+
+  handle: Electron.IpcMain['handle'] = (method, fn) => {
+    if (this._invokeHandlers.has(method)) {
+      throw new Error(`Attempted to register a second handler for '${method}'`)
+    }
+    if (typeof fn !== 'function') {
+      throw new Error(`Expected handler to be a function, but found type '${typeof fn}'`)
+    }
+    this._invokeHandlers.set(method, async (e, ...args) => {
+      try {
+        (e as any)._reply(await Promise.resolve(fn(e, ...args)))
+      } catch (err) {
+        (e as any)._throw(err)
+      }
+    })
+  }
+
+  handleOnce: Electron.IpcMain['handleOnce'] = (method, fn) => {
+    this.handle(method, (e, ...args) => {
+      this.removeHandler(method)
+      return fn(e, ...args)
+    })
+  }
+
+  removeHandler (method: string) {
+    this._invokeHandlers.delete(method)
+  }
+}
+
+const ipcMain = new IpcMain()
 
 // Do not throw exception when channel name is "error".
-emitter.on('error', () => {})
+ipcMain.on('error', () => {})
 
-export default emitter
+export default ipcMain