feat (login page): add a sign in / log in page

lib/auth.ts

@@ -0,0 +1,46 @@
+import NextAuth from "next-auth";
+import Credentials from "next-auth/providers/credentials";
+import bcrypt from "bcryptjs";
+import { prisma } from "@/lib/prisma";
+
+export const { handlers, signIn, signOut, auth } = NextAuth({
+    providers: [
+        Credentials({
+            credentials: {
+                email: { label: "Email", type: "email" },
+                password: { label: "Mot de passe", type: "password" },
+            },
+            async authorize(credentials) {
+                if (!credentials?.email || !credentials?.password) return null;
+
+                const user = await prisma.user.findUnique({
+                    where: { email: credentials.email as string },
+                });
+
+                if (!user) return null;
+
+                const valid = await bcrypt.compare(
+                    credentials.password as string,
+                    user.password
+                );
+
+                if (!valid) return null;
+
+                return { id: user.id, email: user.email, name: user.name };
+            },
+        }),
+    ],
+    callbacks: {
+        async session({ session, token }) {
+            return session;
+        },
+        async jwt({ token, user }) {
+            if (user) token.id = user.id;
+            return token;
+        },
+    },
+    pages: {
+        signIn: "/",
+    },
+    session: { strategy: "jwt" },
+});