:construction: auto update

2 files changed, 82 insertions, 0 deletions

diff --git a/util/src/util/AutoUpdate.ts b/util/src/util/AutoUpdate.ts
new file mode 100644
index 00000000..a2ce73c2
--- /dev/null
+++ b/util/src/util/AutoUpdate.ts
@@ -0,0 +1,80 @@
+import "missing-native-js-functions";
+import fetch from "node-fetch";
+import readline from "readline";
+import fs from "fs/promises";
+import path from "path";
+
+const rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout,
+});
+
+export function enableAutoUpdate(opts: {
+	checkInterval: number | boolean;
+	packageJsonLink: string;
+	path: string;
+	downloadUrl: string;
+	downloadType?: "zip";
+}) {
+	if (!opts.checkInterval) return;
+	var interval = 1000 * 60 * 60 * 24;
+	if (typeof opts.checkInterval === "number") opts.checkInterval = 1000 * interval;
+
+	const i = setInterval(async () => {
+		const currentVersion = await getCurrentVersion(opts.path);
+		const latestVersion = await getLatestVersion(opts.packageJsonLink);
+		if (currentVersion !== latestVersion) {
+			clearInterval(i);
+			console.log(`[Auto Update] Current version (${currentVersion}) is out of date, updating ...`);
+			await download(opts.downloadUrl, opts.path);
+		}
+	}, interval);
+	setImmediate(async () => {
+		const currentVersion = await getCurrentVersion(opts.path);
+		const latestVersion = await getLatestVersion(opts.packageJsonLink);
+		if (currentVersion !== latestVersion) {
+			rl.question(
+				`[Auto Update] Current version (${currentVersion}) is out of date, would you like to update? (yes/no)`,
+				(answer) => {
+					if (answer.toBoolean()) {
+						console.log(`[Auto update] updating ...`);
+						download(opts.downloadUrl, opts.path);
+					} else {
+					}
+				}
+			);
+		}
+	});
+}
+
+async function download(url: string, dir: string) {
+	try {
+		// TODO: use file stream instead of buffer (to prevent crash because of high memory usage for big files)
+		// TODO check file hash
+		const response = await fetch(url);
+		const buffer = await response.buffer();
+		const tempDir = await fs.mkdtemp("fosscord");
+		fs.writeFile(path.join(tempDir, "Fosscord.zip"), buffer);
+	} catch (error) {
+		console.error(`[Auto Update] download failed`, error);
+	}
+}
+
+async function getCurrentVersion(dir: string) {
+	try {
+		const content = await fs.readFile(path.join(dir, "package.json"), { encoding: "utf8" });
+		return JSON.parse(content).version;
+	} catch (error) {
+		throw new Error("[Auto update] couldn't get current version in " + dir);
+	}
+}
+
+async function getLatestVersion(url: string) {
+	try {
+		const response = await fetch(url);
+		const content = await response.json();
+		return content.version;
+	} catch (error) {
+		throw new Error("[Auto update] check failed for " + url);
+	}
+}
diff --git a/util/src/util/Config.ts b/util/src/util/Config.ts
index 09a42564..ec1efc6c 100644
--- a/util/src/util/Config.ts
+++ b/util/src/util/Config.ts
@@ -99,6 +99,7 @@ export interface DefaultOptions {
 		};
 	};
 	security: {
+		autoUpdate: boolean | number;
 		requestSignature: string;
 		jwtSecret: string;
 		forwadedFor: string | null; // header to get the real user ip address
@@ -230,6 +231,7 @@ export const DefaultOptions: DefaultOptions = {
 		},
 	},
 	security: {
+		autoUpdate: true,
 		requestSignature: crypto.randomBytes(32).toString("base64"),
 		jwtSecret: crypto.randomBytes(256).toString("base64"),
 		forwadedFor: null,