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

@@ -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(",");
@@ -112,6 +114,12 @@ async function bootstrap() {
     }
 }
 
+// MacOS only event
+export var darwinURL: string | undefined;
+app.on("open-url", (_, url) => {
+    darwinURL = url;
+});
+
 app.on("window-all-closed", () => {
     if (process.platform !== "darwin") app.quit();
 });

src/main/mainWindow.ts

@@ -36,6 +36,7 @@ import {
     MIN_WIDTH,
     VENCORD_FILES_DIR
 } from "./constants";
+import { darwinURL } from "./index";
 import { Settings, State, VencordSettings } from "./settings";
 import { createSplashWindow } from "./splash";
 import { makeLinksOpenExternally } from "./utils/makeLinksOpenExternally";
@@ -455,18 +456,20 @@ function createMainWindow() {
 
     win.webContents.setUserAgent(BrowserUserAgent);
 
-    const subdomain =
-        Settings.store.discordBranch === "canary" || Settings.store.discordBranch === "ptb"
-            ? `${Settings.store.discordBranch}.`
-            : "";
-
-    win.loadURL(`https://${subdomain}discord.com/app`);
+    // if the open-url event is fired (in index.ts) while starting up, darwinURL will be set. If not fall back to checking the process args (which Windows and Linux use for URI calling.)
+    loadUrl(darwinURL || process.argv.find(arg => arg.startsWith("discord://")));
 
     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 ? new URL(uri).pathname.slice(1) || "app" : "app"}`);
+}
+
 export async function createWindows() {
     const startMinimized = process.argv.includes("--start-minimized");
     const splash = createSplashWindow(startMinimized);
@@ -499,5 +502,13 @@ export async function createWindows() {
         });
     });
 
+    mainWin.webContents.on("did-navigate", (_, url: string, responseCode: number) => {
+        // check url to ensure app doesn't loop
+        if (new URL(url).pathname !== `/app` && responseCode >= 300) {
+            loadUrl(undefined);
+            console.warn(`Caught bad page response: ${responseCode}, dumping to main app`);
+        }
+    });
+
     initArRPC();
 }