feat: add user management to admin panel (add, delete, change password)

app/admin/users/actions.ts

@@ -0,0 +1,68 @@
+'use server';
+
+import { prisma } from '@/lib/db';
+import { getSession } from '@/lib/auth';
+import { redirect } from 'next/navigation';
+import { revalidatePath } from 'next/cache';
+import bcrypt from 'bcryptjs';
+
+async function requireAuth() {
+  const session = await getSession();
+  if (!session) redirect('/admin/login');
+}
+
+export async function createUser(formData: FormData) {
+  await requireAuth();
+
+  const username = formData.get('username') as string;
+  const password = formData.get('password') as string;
+  const confirmPassword = formData.get('confirmPassword') as string;
+
+  if (!username || !password) return;
+  if (password !== confirmPassword) return;
+  if (password.length < 6) return;
+
+  const exists = await prisma.user.findUnique({ where: { username } });
+  if (exists) return;
+
+  const hashed = await bcrypt.hash(password, 10);
+  await prisma.user.create({
+    data: { username, password: hashed },
+  });
+
+  revalidatePath('/admin/users');
+}
+
+export async function deleteUser(formData: FormData) {
+  await requireAuth();
+
+  const id = formData.get('id') as string;
+  if (!id) return;
+
+  // En az 1 kullanıcı kalsın
+  const count = await prisma.user.count();
+  if (count <= 1) return;
+
+  await prisma.user.delete({ where: { id } });
+  revalidatePath('/admin/users');
+}
+
+export async function changePassword(formData: FormData) {
+  await requireAuth();
+
+  const userId = formData.get('userId') as string;
+  const newPassword = formData.get('newPassword') as string;
+  const confirmPassword = formData.get('confirmPassword') as string;
+
+  if (!userId || !newPassword) return;
+  if (newPassword !== confirmPassword) return;
+  if (newPassword.length < 6) return;
+
+  const hashed = await bcrypt.hash(newPassword, 10);
+  await prisma.user.update({
+    where: { id: userId },
+    data: { password: hashed },
+  });
+
+  revalidatePath('/admin/users');
+}