server.js

require("dotenv").config();
const express = require("express");
const fetch = require("node-fetch");
const cors = require("cors");

const app = express();
app.use(cors());
app.use(express.json());
const CLIENT_ID = process.env.DISCORD_CLIENT_ID;
const CLIENT_SECRET = process.env.DISCORD_CLIENT_SECRET;
const REDIRECT_URI = process.env.DISCORD_REDIRECT_URI;
app.get("/login", (req, res) => {
  const discordAuthUrl = `https://discord.com/api/oauth2/authorize?client_id=${CLIENT_ID}&redirect_uri=${encodeURIComponent(
    REDIRECT_URI,
  )}&response_type=code&scope=identify`;
  res.redirect(discordAuthUrl);
});
app.get("/callback", async (req, res) => {
  const code = req.query.code;
  if (!code) return res.send("No code provided");

  try {
    const tokenResponse = await fetch("https://discord.com/api/oauth2/token", {
      method: "POST",
      headers: {
        "Content-Type": "application/x-www-form-urlencoded",
      },
      body: new URLSearchParams({
        client_id: CLIENT_ID,
        client_secret: CLIENT_SECRET,
        grant_type: "authorization_code",
        code: code,
        redirect_uri: REDIRECT_URI,
      }),
    });

    const tokenData = await tokenResponse.json();
    const accessToken = tokenData.access_token;
    const userResponse = await fetch("https://discord.com/api/users/@me", {
      headers: {
        Authorization: `Bearer ${accessToken}`,
      },
    });

    const userData = await userResponse.json();
    res.json({
      id: userData.id,
      username: userData.username,
      discriminator: userData.discriminator,
    });
  } catch (err) {
    console.error(err);
    res.status(500).send("Error logging in with Discord");
  }
});
app.get("/", (req, res) => {
  res.send("Discord OAuth2 Server is running");
});
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});