feat: add auth using next-auth and discord provider

.env.example

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+NEXT_PUBLIC_API_URL=http://localhost:3000
+
+NEXTAUTH_URL=http://localhost:3000
+NEXTAUTH_SECRET=
+
+DISCORD_CLIENT_ID=
+DISCORD_CLIENT_SECRET=

.eslintrc.json

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+{
+	"extends": ["next/core-web-vitals", "next/typescript"]
+}

.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# env files (can opt-in for committing if needed)
+.env
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

README.md

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+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

next.config.ts

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+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+	/* config options here */
+};
+
+export default nextConfig;

package.json

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+{
+	"name": "client",
+	"version": "0.1.0",
+	"private": true,
+	"scripts": {
+		"dev": "next dev --turbopack",
+		"build": "next build",
+		"start": "next start",
+		"lint": "next lint"
+	},
+	"dependencies": {
+		"jsonwebtoken": "^9.0.2",
+		"next": "15.0.3",
+		"next-auth": "^4.24.10",
+		"react": "19.0.0-rc-66855b96-20241106",
+		"react-dom": "19.0.0-rc-66855b96-20241106"
+	},
+	"devDependencies": {
+		"@types/jsonwebtoken": "^9.0.7",
+		"@types/node": "^20",
+		"@types/react": "^18",
+		"@types/react-dom": "^18",
+		"eslint": "^8",
+		"eslint-config-next": "15.0.3",
+		"postcss": "^8",
+		"tailwindcss": "^3.4.1",
+		"typescript": "^5"
+	}
+}

postcss.config.mjs

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+/** @type {import('postcss-load-config').Config} */
+const config = {
+	plugins: {
+		tailwindcss: {},
+	},
+};
+
+export default config;

src/app/api/auth/[...nextauth]/route.ts

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+import NextAuth from "next-auth";
+import DiscordProvider from "next-auth/providers/discord";
+import jwt from "jsonwebtoken";
+
+const handler = NextAuth({
+	providers: [
+		DiscordProvider({
+			clientId: process.env.DISCORD_CLIENT_ID!,
+			clientSecret: process.env.DISCORD_CLIENT_SECRET!,
+		}),
+	],
+	secret: process.env.NEXTAUTH_SECRET,
+	session: {
+		strategy: "jwt",
+	},
+	callbacks: {
+		async jwt({ token, account, user }) {
+			if (account) {
+				token.accessToken = jwt.sign(
+					{
+						userId: user?.id,
+						provider: account.provider,
+						timestamp: Date.now(),
+					},
+					process.env.NEXTAUTH_SECRET!,
+					{ expiresIn: "1h" }
+				);
+			}
+			return token;
+		},
+		async session({ session, token }) {
+			console.log(token);
+			// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+			// @ts-ignore
+			session.accessToken = token.accessToken;
+			return session;
+		},
+	},
+});
+export { handler as GET, handler as POST };

src/app/auth/page.tsx

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+"use client"
+import { signIn, signOut, useSession } from "next-auth/react";
+
+const LoginPage = () => {
+	const { data: session } = useSession();
+
+	return (
+		<div
+			style={{
+				display: "flex",
+				flexDirection: "column",
+				alignItems: "center",
+				marginTop: "50px",
+			}}
+		>
+			<h1>NextAuth Login</h1>
+			{!session ? (
+				<div>
+					<p>You are not signed in.</p>
+					<button
+						style={{
+							padding: "10px 20px",
+							backgroundColor: "#7289DA",
+							color: "white",
+							border: "none",
+							borderRadius: "5px",
+							cursor: "pointer",
+						}}
+						onClick={() => signIn("discord")} // Modifier selon votre provider
+					>
+						Sign in with Discord
+					</button>
+				</div>
+			) : (
+				<div>
+					<p>Welcome, {session.user?.name || "User"}!</p>
+					<button
+						style={{
+							padding: "10px 20px",
+							backgroundColor: "red",
+							color: "white",
+							border: "none",
+							borderRadius: "5px",
+							cursor: "pointer",
+						}}
+						onClick={() => signOut()}
+					>
+						Sign out
+					</button>
+				</div>
+			)}
+		</div>
+	);
+};
+
+export default LoginPage;

src/app/components/FetchWithSession.tsx

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+import { useSession } from "next-auth/react";
+import { useEffect, useState } from "react";
+
+const FetchWithSession = () => {
+	const { data: session, status } = useSession(); // Récupère la session utilisateur
+	const [data, setData] = useState(null);
+	const [error, setError] = useState(null);
+
+	useEffect(() => {
+		const fetchData = async () => {
+			if (status === "authenticated" && session) {
+				try {
+					const response = await fetch(
+						`${process.env.NEXT_PUBLIC_API_URL}/`,
+						{
+							method: "GET",
+							headers: {
+								"Content-Type": "application/json",
+								// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+								// @ts-ignore
+								Authorization: `Bearer ${session.accessToken}`, // Exemple : inclure un token JWT si nécessaire
+							},
+						}
+					);
+
+					if (!response.ok) {
+						throw new Error("Failed to fetch data");
+					}
+
+					const result = await response.json();
+					setData(result);
+				} catch (err) {
+					// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+					// @ts-ignore
+					setError(err.message);
+				}
+			}
+		};
+
+		fetchData();
+	}, [status, session]);
+
+	if (status === "loading") {
+		return <div>Loading...</div>;
+	}
+
+	if (status === "unauthenticated") {
+		return <div>You must log in to access this data.</div>;
+	}
+
+	return (
+		<div>
+			{error && <p>Error: {error}</p>}
+			{data ? (
+				<pre>{JSON.stringify(data, null, 2)}</pre>
+			) : (
+				<p>Fetching data...</p>
+			)}
+		</div>
+	);
+};
+
+export default FetchWithSession;

src/app/components/SessionProviderWrapper.tsx

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+"use client"; // Indique que ce composant est un Client Component
+
+import { SessionProvider } from "next-auth/react";
+
+export default function SessionProviderWrapper({
+	children,
+}: {
+	children: React.ReactNode;
+}) {
+	return <SessionProvider>{children}</SessionProvider>;
+}

src/app/globals.css

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+:root {
+  --background: #ffffff;
+  --foreground: #171717;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --background: #0a0a0a;
+    --foreground: #ededed;
+  }
+}
+
+body {
+  color: var(--foreground);
+  background: var(--background);
+  font-family: Arial, Helvetica, sans-serif;
+}

src/app/layout.tsx

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+import SessionProviderWrapper from "./components/SessionProviderWrapper";
+import "./globals.css";
+
+export default function RootLayout({
+	children,
+}: {
+	children: React.ReactNode;
+}) {
+	return (
+		<html lang="en">
+			<body>
+				<SessionProviderWrapper>{children}</SessionProviderWrapper>
+			</body>
+		</html>
+	);
+}

src/app/page.tsx

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+"use client";
+import { useSession } from "next-auth/react";
+import FetchWithSession from "./components/FetchWithSession";
+
+export default function Home() {
+	const { data } = useSession(); // Récupère la session
+
+	console.log(data);
+
+	return (
+		<>
+			<h1>Home</h1>
+			<FetchWithSession />
+		</>
+	);
+}

tailwind.config.ts

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+import type { Config } from "tailwindcss";
+
+export default {
+	content: [
+		"./src/pages/**/*.{js,ts,jsx,tsx,mdx}",
+		"./src/components/**/*.{js,ts,jsx,tsx,mdx}",
+		"./src/app/**/*.{js,ts,jsx,tsx,mdx}",
+	],
+	theme: {
+		extend: {
+			colors: {
+				background: "var(--background)",
+				foreground: "var(--foreground)",
+			},
+		},
+	},
+	plugins: [],
+} satisfies Config;

tsconfig.json

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+{
+	"compilerOptions": {
+		"target": "ES2017",
+		"lib": ["dom", "dom.iterable", "esnext"],
+		"allowJs": true,
+		"skipLibCheck": true,
+		"strict": true,
+		"noEmit": true,
+		"esModuleInterop": true,
+		"module": "esnext",
+		"moduleResolution": "bundler",
+		"resolveJsonModule": true,
+		"isolatedModules": true,
+		"jsx": "preserve",
+		"incremental": true,
+		"plugins": [
+			{
+				"name": "next"
+			}
+		],
+		"paths": {
+			"@/*": ["./src/*"]
+		}
+	},
+	"include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+	"exclude": ["node_modules"]
+}