1 files changed, 86 insertions, 0 deletions
diff --git a/src/ipcMain/updater/http.ts b/src/ipcMain/updater/http.ts
new file mode 100644
index 0000000..5b3f0ff
--- /dev/null
+++ b/src/ipcMain/updater/http.ts
@@ -0,0 +1,86 @@
+/*
+ * 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 { ipcMain } from "electron";
+import { writeFile } from "fs/promises";
+import { join } from "path";
+
+import gitHash from "~git-hash";
+import gitRemote from "~git-remote";
+
+import { VENCORD_USER_AGENT } from "../../utils/constants";
+import IpcEvents from "../../utils/IpcEvents";
+import { get } from "../simpleGet";
+import { calculateHashes, serializeErrors } from "./common";
+
+const API_BASE = `https://api.github.com/repos/${gitRemote}`;
+let PendingUpdates = [] as [string, Buffer][];
+
+async function githubGet(endpoint: string) {
+    return get(API_BASE + endpoint, {
+        headers: {
+            Accept: "application/vnd.github+json",
+            // "All API requests MUST include a valid User-Agent header.
+            // Requests with no User-Agent header will be rejected."
+            "User-Agent": VENCORD_USER_AGENT,
+            // todo: perhaps add support for (optional) api token?
+            // unauthorised rate limit is 60 reqs/h
+            // https://github.com/settings/tokens/new?description=Vencord%20Updater
+        }
+    });
+}
+
+async function calculateGitChanges() {
+    const res = await githubGet(`/compare/${gitHash}...HEAD`);
+
+    const data = JSON.parse(res.toString("utf-8"));
+    return data.commits.map(c => ({
+        // github api only sends the long sha
+        hash: c.sha.slice(0, 7),
+        author: c.author.login,
+        message: c.commit.message
+    }));
+}
+
+async function fetchUpdates() {
+    const release = await githubGet("/releases/latest");
+
+    const data = JSON.parse(release.toString());
+    const hash = data.name.slice(data.name.lastIndexOf(" ") + 1);
+    if (hash === gitHash)
+        return true;
+
+    await Promise.all(data.assets.map(async ({ name, browser_download_url }) => {
+        if (["patcher.js", "preload.js", "renderer.js"].some(s => name.startsWith(s))) {
+            PendingUpdates.push([name, await get(browser_download_url)]);
+        }
+    }));
+    return true;
+}
+
+async function applyUpdates() {
+    await Promise.all(PendingUpdates.map(([name, data]) => writeFile(join(__dirname, name), data)));
+    PendingUpdates = [];
+    return true;
+}
+
+ipcMain.handle(IpcEvents.GET_HASHES, serializeErrors(calculateHashes));
+ipcMain.handle(IpcEvents.GET_REPO, serializeErrors(() => `https://github.com/${gitRemote}`));
+ipcMain.handle(IpcEvents.GET_UPDATES, serializeErrors(calculateGitChanges));
+ipcMain.handle(IpcEvents.UPDATE, serializeErrors(fetchUpdates));
+ipcMain.handle(IpcEvents.BUILD, serializeErrors(applyUpdates));