Implement login

index.js

@@ -1,28 +1,75 @@
 const express = require("express");
+const cookieParser = require('cookie-parser')
 const discord = require("discord.js");
 const Auth = require("discord-oauth2");
 const crypto = require('crypto');
 const config = require("./config.json");
 
-const client = new discord.Client();
+const client = new discord.Client({
+    ws: {
+        intents: [
+            'GUILDS'
+        ]
+    }
+});
 const app = express();
 const auth = new Auth({
     clientId: config.cid,
     clientSecret: config.secret
 });
 
+app.use(cookieParser());
+
 app.get("/login", (req, res) => {
     var state = crypto.randomBytes(64).toString('hex');
     res.cookie("state", state);
     res.redirect(auth.generateAuthUrl({
         scope: ["connections", "identify"],
-        state
+        state,
+        redirectUri: "http://localhost:8080/callback"
     }));
 });
 
-app.get("/callback", (req, res) => {
+app.get("/callback", async (req, res) => {
+    const { code, state } = req.query;
+    if(state !== req.cookies.state) return res.status(400).send("Wrong state");
+    try {
+        var token = await auth.tokenRequest({
+            code,
+            scope: [ "connections", "identify" ],
+            grantType: "authorization_code",
+            redirectUri: "http://localhost:8080/callback"
+        });
+    } catch(e) {
+        return res.status(403).send("Invalid code");
+    }
+    var connections = await auth.getUserConnections(token.access_token);
+    var reddit = connections.filter(val => val.type === "reddit");
+    if(!reddit) return res.send("No reddit connection");
+    reddit = reddit[0];
+    var user = await auth.getUser(token.access_token);
 
+    try {
+        var guild = await client.guilds.fetch(config.guild);
+    } catch(e) {
+        return res.status(500).send("Guild not found");
+    }
+    try {
+        var member = await guild.members.fetch(user.id);
+    } catch(e) {
+        return res.status(403).send("Member not found");
+    }
+    try {
+        await member.setNickname("u/" + reddit.name);
+    } catch(e) {
+        console.log(e);
+        return res.status(500).send("Missing nickname permission");
+    }
+    res.send("Done");
 });
 
+client.login(config.token);
 
-client.login(config.token);
+app.listen(8080, () => {
+    console.log("http://localhost:8080/login");
+})

package.json

@@ -10,6 +10,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "cookie-parser": "^1.4.5",
     "discord-oauth2": "^2.3.0",
     "discord.js": "^12.3.1",
     "express": "^4.17.1"