Implement default avatars #979

package-lock.json

@@ -45,7 +45,6 @@
 				"probe-image-size": "^7.2.3",
 				"proxy-agent": "^5.0.0",
 				"reflect-metadata": "^0.1.13",
-				"sqlite3": "*",
 				"ts-node": "^10.9.1",
 				"tslib": "^2.4.1",
 				"typeorm": "^0.3.10",

src/cdn/routes/embed.ts

@@ -0,0 +1,67 @@
+/*
+	Fosscord: A FOSS re-implementation and extension of the Discord.com backend.
+	Copyright (C) 2023 Fosscord and Fosscord Contributors
+	
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero 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 Affero General Public License for more details.
+	
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { Request, Response, Router } from "express";
+import FileType from "file-type";
+import fs from "fs/promises";
+import { HTTPError } from "lambert-server";
+import { join } from "path";
+
+const defaultAvatarHashMap = new Map([
+	["0", "1f0bfc0865d324c2587920a7d80c609b"],
+	["1", "c09a43a372ba81e3018c3151d4ed4773"],
+	["2", "7c8f476123d28d103efe381543274c25"],
+	["3", "6f26ddd1bf59740c536d2274bb834a05"],
+	["4", "3c6ccb83716d1e4fb91d3082f6b21d77"],
+	["5", "4c1b599b1ef5b9f1874fdb9933f3e03b"],
+]);
+
+const router = Router();
+
+async function getFile(path: string) {
+	try {
+		return fs.readFile(path);
+	} catch (error) {
+		try {
+			const files = await fs.readdir(path);
+			if (!files.length) return null;
+			return fs.readFile(join(path, files[0]));
+		} catch (error) {
+			return null;
+		}
+	}
+}
+
+router.get("/avatars/:id", async (req: Request, res: Response) => {
+	let { id } = req.params;
+	id = id.split(".")[0]; // remove .file extension
+	const hash = defaultAvatarHashMap.get(id);
+	if (!hash) throw new HTTPError("not found", 404);
+	const path = join(process.cwd(), "assets", "public", `${hash}.png`);
+
+	const file = await getFile(path);
+	if (!file) throw new HTTPError("not found", 404);
+	const type = await FileType.fromBuffer(file);
+
+	res.set("Content-Type", type?.mime);
+	res.set("Cache-Control", "public, max-age=31536000");
+
+	return res.send(file);
+});
+
+export default router;