1 files changed, 107 insertions, 0 deletions
diff --git a/src/patchWin32Updater.ts b/src/patchWin32Updater.ts
new file mode 100644
index 0000000..2044615
--- /dev/null
+++ b/src/patchWin32Updater.ts
@@ -0,0 +1,107 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { app, autoUpdater } from "electron";
+import { dirname, basename, join } from "path";
+import { readdirSync, existsSync, mkdirSync, writeFileSync } from "fs";
+
+const { setAppUserModelId } = app;
+
+// Apparently requiring Discords updater too early leads into issues,
+// copied this workaround from powerCord
+app.setAppUserModelId = function (id: string) {
+    app.setAppUserModelId = setAppUserModelId;
+
+    setAppUserModelId.call(this, id);
+
+    patchUpdater();
+};
+
+function isNewer($new: string, old: string) {
+    const newParts = $new.slice(4).split(".").map(Number);
+    const oldParts = old.slice(4).split(".").map(Number);
+
+    for (let i = 0; i < oldParts.length; i++) {
+        if (newParts[i] > oldParts[i]) return true;
+        if (newParts[i] < oldParts[i]) return false;
+    }
+    return false;
+}
+
+function patchLatest() {
+    const currentAppPath = dirname(process.execPath);
+    const currentVersion = basename(currentAppPath);
+    const discordPath = join(currentAppPath, "..");
+
+    const latestVersion = readdirSync(discordPath).reduce((prev, curr) => {
+        return (curr.startsWith("app-") && isNewer(curr, prev))
+            ? curr
+            : prev;
+    }, currentVersion as string);
+
+    if (latestVersion === currentVersion) return;
+
+    const app = join(discordPath, latestVersion, "resources", "app");
+    if (existsSync(app)) return;
+
+    console.info("[Vencord] Detected Host Update. Repatching...");
+
+    const patcherPath = join(__dirname, "patcher.js");
+    mkdirSync(app);
+    writeFileSync(join(app, "package.json"), JSON.stringify({
+        name: "discord",
+        main: "index.js"
+    }));
+    writeFileSync(join(app, "index.js"), `require(${JSON.stringify(patcherPath)});`);
+}
+
+// Windows Host Updates install to a new folder app-{HOST_VERSION}, so we
+// need to reinject
+function patchUpdater() {
+    const main = require.main!;
+    const buildInfo = require(join(process.resourcesPath, "build_info.json"));
+
+    try {
+        if (buildInfo?.newUpdater) {
+            const autoStartScript = join(main.filename, "..", "autoStart", "win32.js");
+            const { update } = require(autoStartScript);
+
+            // New Updater Injection
+            require.cache[autoStartScript]!.exports.update = function () {
+                patchLatest();
+                update.apply(this, arguments);
+            };
+        } else {
+            const hostUpdaterScript = join(main.filename, "..", "hostUpdater.js");
+            const { quitAndInstall } = require(hostUpdaterScript);
+
+            // Old Updater Injection
+            require.cache[hostUpdaterScript]!.exports.quitAndInstall = function () {
+                patchLatest();
+                quitAndInstall.apply(this, arguments);
+            };
+        }
+    } catch {
+        // OpenAsar uses electrons autoUpdater on Windows
+        const { quitAndInstall } = autoUpdater;
+        autoUpdater.quitAndInstall = function () {
+            patchLatest();
+            quitAndInstall.call(this);
+        };
+    }
+}