Add Role Icons (#574)

* Role Icons

Co-authored-by: Erkin Alp Güney <erkinalp9035@gmail.com> 
*  Cache coherency rules

Co-authored-by: MANIKILLER <manikillrorg@gmail.com>
Co-authored-by: ImAaronFR <96433859+ImAaronFR@users.noreply.github.com>

2 files changed, 106 insertions, 0 deletions

diff --git a/cdn/src/Server.ts b/cdn/src/Server.ts
index cac34a80..b8d71fa9 100644
--- a/cdn/src/Server.ts
+++ b/cdn/src/Server.ts
@@ -2,6 +2,7 @@ import { Server, ServerOptions } from "lambert-server";
 import { Config, initDatabase, registerRoutes } from "@fosscord/util";
 import path from "path";
 import avatarsRoute from "./routes/avatars";
+import iconsRoute from "./routes/role-icons";
 import bodyParser from "body-parser";
 
 export interface CDNServerOptions extends ServerOptions {}
@@ -40,6 +41,9 @@ export class CDNServer extends Server {
 		this.app.use("/icons/", avatarsRoute);
 		this.log("verbose", "[Server] Route /icons registered");
 
+		this.app.use("/role-icons/", iconsRoute);
+		this.log("verbose", "[Server] Route /role-icons registered");
+
 		this.app.use("/emojis/", avatarsRoute);
 		this.log("verbose", "[Server] Route /emojis registered");
 
diff --git a/cdn/src/routes/role-icons.ts b/cdn/src/routes/role-icons.ts
new file mode 100644
index 00000000..1ad1637d
--- /dev/null
+++ b/cdn/src/routes/role-icons.ts
@@ -0,0 +1,102 @@
+import { Router, Response, Request } from "express";
+import { Config, Snowflake } from "@fosscord/util";
+import { storage } from "../util/Storage";
+import FileType from "file-type";
+import { HTTPError } from "lambert-server";
+import crypto from "crypto";
+import { multer } from "../util/multer";
+
+//Role icons ---> avatars.ts modified
+
+// TODO: check premium and animated pfp are allowed in the config
+// TODO: generate different sizes of icon
+// TODO: generate different image types of icon
+// TODO: delete old icons
+
+const STATIC_MIME_TYPES = [
+	"image/png",
+	"image/jpeg",
+	"image/webp",
+	"image/svg+xml",
+	"image/svg",
+];
+const ALLOWED_MIME_TYPES = [...STATIC_MIME_TYPES];
+
+const router = Router();
+
+router.post(
+	"/:role_id",
+	multer.single("file"),
+	async (req: Request, res: Response) => {
+		if (req.headers.signature !== Config.get().security.requestSignature)
+			throw new HTTPError("Invalid request signature");
+		if (!req.file) throw new HTTPError("Missing file");
+		const { buffer, mimetype, size, originalname, fieldname } = req.file;
+		const { role_id } = req.params;
+
+		var hash = crypto
+			.createHash("md5")
+			.update(Snowflake.generate())
+			.digest("hex");
+
+		const type = await FileType.fromBuffer(buffer);
+		if (!type || !ALLOWED_MIME_TYPES.includes(type.mime))
+			throw new HTTPError("Invalid file type");
+
+		const path = `role-icons/${role_id}/${hash}.png`;
+		const endpoint =
+			Config.get().cdn.endpointPublic || "http://localhost:3003";
+
+		await storage.set(path, buffer);
+
+		return res.json({
+			id: hash,
+			content_type: type.mime,
+			size,
+			url: `${endpoint}${req.baseUrl}/${role_id}/${hash}`,
+		});
+	}
+);
+
+router.get("/:role_id", async (req: Request, res: Response) => {
+	var { role_id } = req.params;
+	//role_id = role_id.split(".")[0]; // remove .file extension
+	const path = `role-icons/${role_id}`;
+
+	const file = await storage.get(path);
+	if (!file) throw new HTTPError("not found", 404);
+	const type = await FileType.fromBuffer(file);
+
+	res.set("Content-Type", type?.mime);
+	res.set("Cache-Control", "public, max-age=31536000, must-revalidate");
+
+	return res.send(file);
+});
+
+router.get("/:role_id/:hash", async (req: Request, res: Response) => {
+	var { role_id, hash } = req.params;
+	//hash = hash.split(".")[0]; // remove .file extension
+	const path = `role-icons/${role_id}/${hash}`;
+
+	const file = await storage.get(path);
+	if (!file) throw new HTTPError("not found", 404);
+	const type = await FileType.fromBuffer(file);
+
+	res.set("Content-Type", type?.mime);
+	res.set("Cache-Control", "public, max-age=31536000, must-revalidate");
+
+	return res.send(file);
+});
+
+router.delete("/:role_id/:id", async (req: Request, res: Response) => {
+	if (req.headers.signature !== Config.get().security.requestSignature)
+		throw new HTTPError("Invalid request signature");
+	const { role_id, id } = req.params;
+	const path = `role-icons/${role_id}/${id}`;
+
+	await storage.delete(path);
+
+	return res.send({ success: true });
+});
+
+export default router;