Add authentication endpoints & refactor

client/controllers/authentication.ts

@@ -0,0 +1,100 @@
+import express from 'express';
+import ip from 'ip';
+import DiscordOauth2 from 'discord-oauth2';
+import { ssl } from '../server';
+import * as dotenv from 'dotenv';
+
+dotenv.config();
+
+const router = express.Router();
+const oauth = new DiscordOauth2();
+
+var clientId = process.env.OAUTH_CLIENT_ID;
+var clientSecret = process.env.OAUTH_CLIENT_SECRET;
+var customRedirectUrl = process.env.OAUTH_REDIRECT_URI;
+var scopes = "identify email guilds";
+
+router.get('/login', (req, res) => {
+    if(!variablesIsSet(res))
+        return;
+
+    var redirect = `${ssl}://${ip.address()}/oauth`
+
+    if(customRedirectUrl && customRedirectUrl != "default")
+        redirect = `${customRedirectUrl}/oauth`
+
+    res.redirect(`https://discordapp.com/api/oauth2/authorize?client_id=${clientId}&scope=${scopes.replace(' ', '+')}&response_type=code&redirect_uri=${redirect}`);
+});
+
+router.get('/oauth', async (_req: any, res: express.Response) => {
+    if(!variablesIsSet(res))
+        return;
+
+    var options = {
+        url: 'https://discord.com/api/oauth2/token',
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded'
+        },
+        body: new URLSearchParams({
+          'client_id': clientId!,
+          'client_secret': clientSecret!,
+          'grant_type': 'client_credentials',
+          'code': _req.query.code,
+          'redirect_uri': `${ssl}://${ip.address()}`,
+          'scope': scopes
+        })
+      }
+      
+      var response = await fetch('https://discord.com/api/oauth2/token', options)
+      .then((response) => {
+        return response.json();
+      });
+
+      res.send(response);
+});
+
+router.get('/userinfo', async (req, res) => {
+    const token = req.headers.authorization;
+
+    if(token == null || token == undefined)
+        return res.sendStatus(401);
+
+    var cleanToken = token.replace('Bearer ', '');
+
+    const user = await oauth.getUser(cleanToken);
+    
+    res.send(user);
+});
+
+router.get('/guilds', async (req, res) => {
+    const token = req.headers.authorization;
+
+    if(token == null || token == undefined)
+        return res.sendStatus(401);
+
+    var cleanToken = token.replace('Bearer ', '');
+
+    const guilds = await oauth.getUserGuilds(cleanToken);
+    
+    res.send(guilds);
+});
+
+function variablesIsSet(response: any): boolean {
+    let errorText = "Invalid configuration. Please check your environment variables.";
+
+    if(clientId == undefined || clientSecret == undefined) {
+        response.send(errorText);
+
+        return false;
+    }
+    
+    if(clientId.length < 5 && clientSecret.length < 5) {
+        response.send(errorText);
+        return false;
+    }
+
+    return true;
+}
+
+export default router;