add main to renderer command API

src/main/arrpc.ts

@@ -5,9 +5,9 @@
  */
 
 import Server from "arrpc";
-import { IpcEvents } from "shared/IpcEvents";
+import { IpcCommands } from "shared/IpcEvents";
 
-import { mainWin } from "./mainWindow";
+import { sendRendererCommand } from "./ipcCommands";
 import { Settings } from "./settings";
 
 let server: any;
@@ -19,16 +19,12 @@ export async function initArRPC() {
 
     try {
         server = await new Server();
-        server.on("activity", (data: any) => mainWin.webContents.send(IpcEvents.ARRPC_ACTIVITY, JSON.stringify(data)));
-        server.on("invite", (invite: string, callback: (valid: boolean) => void) => {
+        server.on("activity", (data: any) => sendRendererCommand(IpcCommands.RPC_ACTIVITY, JSON.stringify(data)));
+        server.on("invite", async (invite: string, callback: (valid: boolean) => void) => {
             invite = String(invite);
             if (!inviteCodeRegex.test(invite)) return callback(false);
 
-            mainWin.webContents
-                // Safety: Result of JSON.stringify should always be safe to equal
-                // Also, just to be super super safe, invite is regex validated above
-                .executeJavaScript(`Vesktop.openInviteModal(${JSON.stringify(invite)})`)
-                .then(callback);
+            await sendRendererCommand(IpcCommands.RPC_INVITE, invite).then(callback);
         });
     } catch (e) {
         console.error("Failed to start arRPC server", e);

src/main/index.ts

@@ -23,6 +23,8 @@ if (IS_DEV) {
     autoUpdater.checkForUpdatesAndNotify();
 }
 
+console.log("Vesktop v" + app.getVersion());
+
 // Make the Vencord files use our DATA_DIR
 process.env.VENCORD_USER_DATA_DIR = DATA_DIR;
 

src/main/ipcCommands.ts

@@ -0,0 +1,56 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0
+ * Vesktop, a desktop app aiming to give you a snappier Discord Experience
+ * Copyright (c) 2023 Vendicated and Vencord contributors
+ */
+
+import { randomUUID } from "crypto";
+import { ipcMain } from "electron";
+import { IpcEvents } from "shared/IpcEvents";
+
+import { mainWin } from "./mainWindow";
+
+const resolvers = new Map<string, Record<"resolve" | "reject", (data: any) => void>>();
+
+export interface IpcMessage {
+    nonce: string;
+    message: string;
+    data?: any;
+}
+
+export interface IpcResponse {
+    nonce: string;
+    ok: boolean;
+    data?: any;
+}
+
+/**
+ * Sends a message to the renderer process and waits for a response.
+ * `data` must be serializable as it will be sent over IPC.
+ *
+ * You must add a handler for the message in the renderer process.
+ */
+export function sendRendererCommand<T = any>(message: string, data?: any) {
+    const nonce = randomUUID();
+
+    const promise = new Promise<T>((resolve, reject) => {
+        resolvers.set(nonce, { resolve, reject });
+    });
+
+    mainWin.webContents.send(IpcEvents.IPC_COMMAND, { nonce, message, data });
+
+    return promise;
+}
+
+ipcMain.on(IpcEvents.IPC_COMMAND, (_event, { nonce, ok, data }: IpcResponse) => {
+    const resolver = resolvers.get(nonce);
+    if (!resolver) throw new Error(`Unknown message: ${nonce}`);
+
+    if (ok) {
+        resolver.resolve(data);
+    } else {
+        resolver.reject(data);
+    }
+
+    resolvers.delete(nonce);
+});

src/main/mainWindow.ts

@@ -18,7 +18,7 @@ import {
 } from "electron";
 import { rm } from "fs/promises";
 import { join } from "path";
-import { IpcEvents } from "shared/IpcEvents";
+import { IpcCommands, IpcEvents } from "shared/IpcEvents";
 import { isTruthy } from "shared/utils/guards";
 import { once } from "shared/utils/once";
 import type { SettingsStore } from "shared/utils/SettingsStore";
@@ -36,6 +36,7 @@ import {
     MIN_WIDTH,
     VENCORD_FILES_DIR
 } from "./constants";
+import { sendRendererCommand } from "./ipcCommands";
 import { Settings, State, VencordSettings } from "./settings";
 import { createSplashWindow } from "./splash";
 import { makeLinksOpenExternally } from "./utils/makeLinksOpenExternally";
@@ -198,9 +199,7 @@ function initMenuBar(win: BrowserWindow) {
                       label: "Settings",
                       accelerator: "CmdOrCtrl+,",
                       async click() {
-                          mainWin.webContents.executeJavaScript(
-                              "Vencord.Webpack.Common.SettingsRouter.open('My Account')"
-                          );
+                          sendRendererCommand(IpcCommands.NAVIGATE_SETTINGS);
                       }
                   },
                   {
@@ -366,7 +365,7 @@ function initSettingsListeners(win: BrowserWindow) {
 }
 
 async function initSpellCheckLanguages(win: BrowserWindow, languages?: string[]) {
-    languages ??= await win.webContents.executeJavaScript("[...new Set(navigator.languages)]").catch(() => []);
+    languages ??= await sendRendererCommand(IpcCommands.GET_LANGUAGES);
     if (!languages) return;
 
     const ses = session.defaultSession;