Support discord uri scheme

package.json

@@ -71,6 +71,12 @@
             "package.json",
             "LICENSE"
         ],
+        "protocols": {
+            "name": "Discord",
+            "schemes": [
+                "discord"
+            ]
+        },
         "beforePack": "scripts/build/sandboxFix.js",
         "linux": {
             "icon": "build/icon.icns",
@@ -111,7 +117,8 @@
                 "GenericName": "Internet Messenger",
                 "Type": "Application",
                 "Categories": "Network;InstantMessaging;Chat;",
-                "Keywords": "discord;vencord;electron;chat;"
+                "Keywords": "discord;vencord;electron;chat;",
+                "MimeType": "x-scheme-handler/discord"
             }
         },
         "mac": {

src/main/index.ts

@@ -11,7 +11,7 @@ import { autoUpdater } from "electron-updater";
 
 import { DATA_DIR } from "./constants";
 import { createFirstLaunchTour } from "./firstLaunch";
-import { createWindows, mainWin } from "./mainWindow";
+import { createWindows, restoreVesktop } from "./mainWindow";
 import { registerMediaPermissionsHandler } from "./mediaPermissions";
 import { registerScreenShareHandler } from "./screenShare";
 import { Settings, State } from "./settings";
@@ -27,6 +27,8 @@ if (IS_DEV) {
 process.env.VENCORD_USER_DATA_DIR = DATA_DIR;
 
 function init() {
+    app.setAsDefaultProtocolClient("discord");
+
     const { disableSmoothScroll, hardwareAcceleration } = Settings.store;
 
     const enabledFeatures = app.commandLine.getSwitchValue("enable-features").split(",");
@@ -67,12 +69,7 @@ function init() {
     if (isDeckGameMode) nativeTheme.themeSource = "dark";
 
     app.on("second-instance", (_event, _cmdLine, _cwd, data: any) => {
-        if (data.IS_DEV) app.quit();
-        else if (mainWin) {
-            if (mainWin.isMinimized()) mainWin.restore();
-            if (!mainWin.isVisible()) mainWin.show();
-            mainWin.focus();
-        }
+        data.IS_DEV ? app.quit() : restoreVesktop();
     });
 
     app.whenReady().then(async () => {

src/main/ipc.ts

@@ -18,7 +18,7 @@ import { IpcEvents } from "../shared/IpcEvents";
 import { setBadgeCount } from "./appBadge";
 import { autoStart } from "./autoStart";
 import { VENCORD_FILES_DIR, VENCORD_QUICKCSS_FILE, VENCORD_THEMES_DIR } from "./constants";
-import { mainWin } from "./mainWindow";
+import { loadUrl, mainWin } from "./mainWindow";
 import { Settings, State } from "./settings";
 import { handle, handleSync } from "./utils/ipcWrappers";
 import { PopoutWindows } from "./utils/popout";
@@ -135,6 +135,11 @@ handle(IpcEvents.CLIPBOARD_COPY_IMAGE, async (_, buf: ArrayBuffer, src: string)
     });
 });
 
+handle(IpcEvents.FOUROHFOUR_PAGE_HANDLER, _ => {
+    loadUrl(undefined);
+    console.warn("caught incomplete uri scheme. dumping to main app");
+});
+
 function readCss() {
     return readFile(VENCORD_QUICKCSS_FILE, "utf-8").catch(() => "");
 }

src/main/mainWindow.ts

@@ -455,18 +455,34 @@ function createMainWindow() {
 
     win.webContents.setUserAgent(BrowserUserAgent);
 
-    const subdomain =
-        Settings.store.discordBranch === "canary" || Settings.store.discordBranch === "ptb"
-            ? `${Settings.store.discordBranch}.`
-            : "";
+    let uriFiredDarwin = false;
+    app.on("open-url", (_, url) => {
+        uriFiredDarwin ? restoreVesktop() : loadUrl(url);
+        uriFiredDarwin = true;
+    });
 
-    win.loadURL(`https://${subdomain}discord.com/app`);
+    const uri = process.argv.find(arg => arg.startsWith("discord://"));
+    uriFiredDarwin || loadUrl(uri);
 
     return win;
 }
 
 const runVencordMain = once(() => require(join(VENCORD_FILES_DIR, "vencordDesktopMain.js")));
 
+export function loadUrl(uri: string | undefined) {
+    const branch = Settings.store.discordBranch;
+    const subdomain = branch === "canary" || branch === "ptb" ? `${branch}.` : "";
+    mainWin.loadURL(`https://${subdomain}discord.com/${uri?.replace(RegExp("^discord://[^/]*/?"), "") || "app"}`);
+}
+
+export function restoreVesktop() {
+    if (mainWin) {
+        if (mainWin.isMinimized()) mainWin.restore();
+        if (!mainWin.isVisible()) mainWin.show();
+        mainWin.focus();
+    }
+}
+
 export async function createWindows() {
     const startMinimized = process.argv.includes("--start-minimized");
     const splash = createSplashWindow(startMinimized);

src/preload/index.ts

@@ -24,6 +24,10 @@ const style = document.createElement("style");
 style.id = "vcd-css-core";
 style.textContent = readFileSync(rendererCss, "utf-8");
 
+document.addEventListener("DOMContentLoaded", () => {
+    if (document.title === "Page Not Found | Discord") ipcRenderer.invoke(IpcEvents.FOUROHFOUR_PAGE_HANDLER);
+});
+
 if (document.readyState === "complete") {
     document.documentElement.appendChild(style);
 } else {

src/shared/IpcEvents.ts

@@ -50,5 +50,7 @@ export const enum IpcEvents {
 
     ARRPC_ACTIVITY = "VCD_ARRPC_ACTIVITY",
 
-    CLIPBOARD_COPY_IMAGE = "VCD_CLIPBOARD_COPY_IMAGE"
+    CLIPBOARD_COPY_IMAGE = "VCD_CLIPBOARD_COPY_IMAGE",
+
+    FOUROHFOUR_PAGE_HANDLER = "VCD_404_PAGE_HANDLER"
 }