Feat: Added /discord/:id endpoint to allow connection to UniCS Discord Bot.

src/controllers/DiscordController.ts

@@ -2,7 +2,11 @@ import { NextFunction, Request } from 'express';
 import { inject, injectable } from 'tsyringe';
 import { AuthenticatedResponse } from '../routes/middleware/getUser';
 import DiscordService from '../services/DiscordService';
-import { HttpCode } from '../util/errors';
+import { APIError, HttpCode } from '../util/errors';
+
+enum GetUserError {
+	UserNotFound = 'User not found',
+}
 
 @injectable()
 export class DiscordController {
@@ -12,6 +16,17 @@ export class DiscordController {
 		this.discordService = discordService;
 	}
 
+	public async getDiscordUser(req: Request & { params: { id: string } }, res: AuthenticatedResponse, next: NextFunction): Promise<void> {
+		try {
+			if (!req.params.id) throw new APIError(HttpCode.NotFound, GetUserError.UserNotFound);
+			const link = await this.discordService.fetch(req.params.id);
+			if (!link) throw new APIError(HttpCode.NotFound, GetUserError.UserNotFound);
+			res.json(link);
+		} catch (error) {
+			next(error);
+		}
+	}
+
 	public async getOAuth2AuthorizeURL(req: Request, res: AuthenticatedResponse, next: NextFunction): Promise<void> {
 		try {
 			const url = await this.discordService.generateAuthorizeURL(res.locals.user.id);

src/routes/UserRoutes.ts

@@ -1,7 +1,7 @@
 import { Router } from 'express';
 import { UserController } from '../controllers/UserController';
 import { inject, injectable } from 'tsyringe';
-import { getUser, isVerified, uploadImg } from './middleware';
+import { getUser, isAdmin, isVerified, uploadImg } from './middleware';
 import { TokenType } from '../util/auth';
 import { DiscordController } from '../controllers/DiscordController';
 import { getRatelimiter, RateLimiter } from '../util/ratelimits';
@@ -33,6 +33,8 @@ export class UserRoutes {
 
 		router.get('/users/:id', getUser(TokenType.Auth), isVerified, this.userController.getUser.bind(this.userController));
 
+		router.get('/users/discord/:id', getUser(TokenType.Auth), isAdmin, this.discordController.getDiscordUser.bind(this.discordController));
+
 		router.get('/users/@me/notes', getUser(TokenType.Auth), isVerified, this.userController.getNotes.bind(this.userController));
 
 		router.put('/users/@me/notes/:id', getUser(TokenType.Auth), isVerified, this.userController.createNote.bind(this.userController));

src/services/DiscordService.ts

@@ -41,6 +41,20 @@ export default class DiscordService {
 		});
 	}
 
+	public async fetch(discordID: string) {
+		return getConnection().transaction(async entityManager => {
+			const link = await entityManager.findOne(DiscordLink, {
+				where: [
+					{ discordID }
+				],
+				relations: [
+					'user'
+				]
+			});
+			return link;
+		});
+	}
+
 	public generateOAuth2State(userID: string) {
 		const hmac = createHmac('sha256', getConfig().discord.oauth2Secret)
 			.update(userID)