feat: initialize project structure with Next.js, Prisma, and Tailwind CSS setup

lib/auth.ts

@@ -0,0 +1,60 @@
+import { NextAuthOptions } from 'next-auth';
+import CredentialsProvider from 'next-auth/providers/credentials';
+import { prisma } from './prisma';
+import bcrypt from 'bcryptjs';
+
+export const authOptions: NextAuthOptions = {
+  providers: [
+    CredentialsProvider({
+      name: 'credentials',
+      credentials: {
+        email: { label: 'Email', type: 'email' },
+        password: { label: 'Password', type: 'password' },
+      },
+      async authorize(credentials) {
+        if (!credentials?.email || !credentials?.password) {
+          return null;
+        }
+        const user = await prisma.user.findUnique({
+          where: { email: credentials.email },
+        });
+        if (!user) {
+          return null;
+        }
+        const isPasswordValid = await bcrypt.compare(
+          credentials.password,
+          user.password,
+        );
+        if (!isPasswordValid) {
+          return null;
+        }
+        return {
+          id: user.id.toString(),
+          email: user.email,
+          role: user.role,
+        };
+      },
+    }),
+  ],
+  session: {
+    strategy: 'jwt',
+  },
+  callbacks: {
+    async jwt({ token, user }) {
+      if (user) {
+        token.role = user.role;
+      }
+      return token;
+    },
+    async session({ session, token }) {
+      if (token) {
+        session.user.id = token.sub!;
+        session.user.role = token.role as string;
+      }
+      return session;
+    },
+  },
+  pages: {
+    signIn: '/login',
+  },
+};

lib/prisma.ts

@@ -0,0 +1,9 @@
+import { PrismaClient } from '@prisma/client';
+
+const globalForPrisma = globalThis as unknown as {
+  prisma: PrismaClient | undefined;
+};
+
+export const prisma = globalForPrisma.prisma ?? new PrismaClient();
+
+if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma;

lib/utils.ts

@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}