subman-nextjs/auth.ts

import NextAuth from 'next-auth';
import { authConfig } from './auth.config';
import Credentials from 'next-auth/providers/credentials';
import { z } from 'zod';
import prisma from 'app/lib/db';
import bcrypt from 'bcrypt';

export type User = {
	id: number,
	email: string,
	password: string
}

async function getUser(email: string): Promise<User | undefined> {
	try {
		const user = await prisma.user.findFirst({
			where: {
				email
			}
		})
		return user
	} catch (error) {
		throw new Error("failed to fetch user")
	}
}



export const { auth, signIn, signOut } = NextAuth({
	...authConfig,
	providers: [Credentials({
		async authorize(credentials) {
			const parsedCredentials = z
				.object({ email: z.string().email(), password: z.string().min(6) })
				.safeParse(credentials);

			console.log(`parsed credentials: ${JSON.stringify(parsedCredentials)}`)

			if (parsedCredentials.success) {
				const { email, password } = parsedCredentials.data;
				const user = await getUser(email);
				console.log(`USER:${user}`)
				if (!user) return null;
				console.log(`checking string "·${password}" against hash "${user.password}"`)
				const passwordsMatch = await bcrypt.compare(password, user.password);

				if (passwordsMatch) {
					console.log("passwords match!")
					return user
				};
			}

			console.log('Invalid credentials');
			return null;
		},
	})],
});