feat(users): gestione utenti /admin/users con guardie self/ultimo-admin

src/lib/auth.ts

@@ -78,6 +78,36 @@ export function listUsers(db: Database.Database): { id: number; username: string
     { id: number; username: string; role: string }[];
 }
 
+export function countAdmins(db: Database.Database): number {
+  return (db.prepare("SELECT COUNT(*) AS n FROM users WHERE role = 'admin'").get() as { n: number }).n;
+}
+
+export function getUserById(db: Database.Database, id: number): { id: number; username: string; role: string } | null {
+  const row = db.prepare('SELECT id, username, role FROM users WHERE id = ?').get(id) as
+    { id: number; username: string; role: string } | undefined;
+  return row ?? null;
+}
+
+export function updateUserRole(db: Database.Database, id: number, role: Role): void {
+  db.prepare('UPDATE users SET role = ? WHERE id = ?').run(role, id);
+}
+
+export function updateUserPassword(db: Database.Database, id: number, hash: string): void {
+  db.prepare('UPDATE users SET password_hash = ? WHERE id = ?').run(hash, id);
+}
+
+export function deleteUser(db: Database.Database, id: number): void {
+  db.prepare('DELETE FROM users WHERE id = ?').run(id);
+}
+
+export function randomPassword(): string {
+  return randomBytes(9).toString('base64url'); // ~12 caratteri
+}
+
+export function isRole(v: unknown): v is Role {
+  return v === 'admin' || v === 'superuser' || v === 'user';
+}
+
 export function landingFor(role: string): string {
   if (role === 'superuser') return '/admin/content';
   return '/admin';

src/pages/admin/users.astro

@@ -0,0 +1,95 @@
+---
+import Admin from '../../layouts/Admin.astro';
+import { getDb } from '../../lib/db';
+import { listUsers } from '../../lib/auth';
+export const prerender = false;
+const users = listUsers(getDb());
+const me = Astro.locals.user!;
+---
+<Admin title="Utenti">
+  <h1>Utenti</h1>
+
+  <h2>Nuovo utente</h2>
+  <form id="new-user" style="max-width:420px">
+    <input class="afield" name="username" placeholder="Nome utente" required />
+    <input class="afield" name="password" type="text" placeholder="Password (min 8)" required />
+    <select class="afield" name="role">
+      <option value="user">user</option>
+      <option value="superuser">superuser</option>
+      <option value="admin">admin</option>
+    </select>
+    <button class="abtn" type="submit">Crea</button>
+    <span class="form-msg" id="new-msg"></span>
+  </form>
+
+  <h2 style="margin-top:30px">Elenco</h2>
+  <table>
+    <thead><tr><th>Utente</th><th>Ruolo</th><th></th></tr></thead>
+    <tbody>
+      {users.map((u) => (
+        <tr data-id={u.id}>
+          <td>{u.username}{u.id === me.id && ' (tu)'}</td>
+          <td>
+            <select class="role-sel" data-id={u.id}>
+              {['user', 'superuser', 'admin'].map((r) => <option value={r} selected={u.role === r}>{r}</option>)}
+            </select>
+          </td>
+          <td>
+            <button class="abtn" data-reset={u.id}>Reset password</button>
+            {u.id !== me.id && <button class="abtn abtn--danger" data-del={u.id}>Elimina</button>}
+          </td>
+        </tr>
+      ))}
+    </tbody>
+  </table>
+  <p class="form-msg" id="row-msg"></p>
+</Admin>
+
+<script>
+  const rowMsg = document.getElementById('row-msg')!;
+  const show = (el: HTMLElement, text: string, ok = false) => {
+    el.textContent = text;
+    el.className = 'form-msg ' + (ok ? 'form-msg--ok' : 'form-msg--err');
+  };
+
+  document.getElementById('new-user')!.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    const f = e.target as HTMLFormElement;
+    const body = {
+      username: (f.elements.namedItem('username') as HTMLInputElement).value,
+      password: (f.elements.namedItem('password') as HTMLInputElement).value,
+      role: (f.elements.namedItem('role') as HTMLSelectElement).value,
+    };
+    const res = await fetch('/api/admin/users', {
+      method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body),
+    });
+    const msg = document.getElementById('new-msg') as HTMLElement;
+    if (res.ok) { show(msg, 'Creato ✓', true); setTimeout(() => location.reload(), 600); }
+    else show(msg, (await res.json()).error ?? 'Errore');
+  });
+
+  document.querySelectorAll<HTMLSelectElement>('.role-sel').forEach((sel) =>
+    sel.addEventListener('change', async () => {
+      const res = await fetch(`/api/admin/users/${sel.dataset.id}/role`, {
+        method: 'PUT', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ role: sel.value }),
+      });
+      if (res.ok) show(rowMsg, 'Ruolo aggiornato ✓', true);
+      else { show(rowMsg, (await res.json()).error ?? 'Errore'); location.reload(); }
+    }));
+
+  document.querySelectorAll<HTMLButtonElement>('[data-reset]').forEach((b) =>
+    b.addEventListener('click', async () => {
+      if (!confirm('Generare una nuova password per questo utente?')) return;
+      const res = await fetch(`/api/admin/users/${b.dataset.reset}/reset-password`, { method: 'POST' });
+      if (res.ok) { const { password } = await res.json(); prompt('Nuova password (copiala e consegnala ora):', password); }
+      else show(rowMsg, (await res.json()).error ?? 'Errore');
+    }));
+
+  document.querySelectorAll<HTMLButtonElement>('[data-del]').forEach((b) =>
+    b.addEventListener('click', async () => {
+      if (!confirm('Eliminare definitivamente questo utente?')) return;
+      const res = await fetch(`/api/admin/users/${b.dataset.del}`, { method: 'DELETE' });
+      if (res.ok) location.reload();
+      else show(rowMsg, (await res.json()).error ?? 'Errore');
+    }));
+</script>

src/pages/api/admin/users/[id]/index.ts

@@ -0,0 +1,19 @@
+import type { APIRoute } from 'astro';
+import { getDb } from '../../../../../lib/db';
+import { getUserById, deleteUser, countAdmins } from '../../../../../lib/auth';
+export const prerender = false;
+
+const json = (status: number, body: object) =>
+  new Response(JSON.stringify(body), { status, headers: { 'Content-Type': 'application/json' } });
+
+export const DELETE: APIRoute = ({ params, locals }) => {
+  const id = Number(params.id);
+  const target = getUserById(getDb(), id);
+  if (!target) return json(404, { error: 'Utente inesistente.' });
+  if (id === locals.user!.id) return json(400, { error: 'Non puoi eliminare te stesso.' });
+  if (target.role === 'admin' && countAdmins(getDb()) <= 1) {
+    return json(400, { error: 'Deve restare almeno un admin.' });
+  }
+  deleteUser(getDb(), id);
+  return json(200, { ok: true });
+};

src/pages/api/admin/users/[id]/reset-password.ts

@@ -0,0 +1,16 @@
+import type { APIRoute } from 'astro';
+import { getDb } from '../../../../../lib/db';
+import { getUserById, updateUserPassword, hashPassword, randomPassword } from '../../../../../lib/auth';
+export const prerender = false;
+
+const json = (status: number, body: object) =>
+  new Response(JSON.stringify(body), { status, headers: { 'Content-Type': 'application/json' } });
+
+export const POST: APIRoute = ({ params }) => {
+  const id = Number(params.id);
+  if (!getUserById(getDb(), id)) return json(404, { error: 'Utente inesistente.' });
+  const password = randomPassword();
+  updateUserPassword(getDb(), id, hashPassword(password));
+  // La password in chiaro è restituita UNA sola volta: l'admin la copia e la consegna.
+  return json(200, { password });
+};

src/pages/api/admin/users/[id]/role.ts

@@ -0,0 +1,21 @@
+import type { APIRoute } from 'astro';
+import { getDb } from '../../../../../lib/db';
+import { getUserById, updateUserRole, countAdmins, isRole } from '../../../../../lib/auth';
+export const prerender = false;
+
+const json = (status: number, body: object) =>
+  new Response(JSON.stringify(body), { status, headers: { 'Content-Type': 'application/json' } });
+
+export const PUT: APIRoute = async ({ params, request }) => {
+  const id = Number(params.id);
+  const target = getUserById(getDb(), id);
+  if (!target) return json(404, { error: 'Utente inesistente.' });
+  let data: { role?: unknown };
+  try { data = await request.json(); } catch { return json(400, { error: 'Dati non validi.' }); }
+  if (!isRole(data.role)) return json(400, { error: 'Ruolo non valido.' });
+  if (target.role === 'admin' && data.role !== 'admin' && countAdmins(getDb()) <= 1) {
+    return json(400, { error: 'Deve restare almeno un admin.' });
+  }
+  updateUserRole(getDb(), id, data.role);
+  return json(200, { ok: true });
+};

src/pages/api/admin/users/index.ts

@@ -0,0 +1,26 @@
+import type { APIRoute } from 'astro';
+import { getDb } from '../../../../lib/db';
+import { createUser, listUsers, isRole } from '../../../../lib/auth';
+export const prerender = false;
+
+const json = (status: number, body: object) =>
+  new Response(JSON.stringify(body), { status, headers: { 'Content-Type': 'application/json' } });
+
+export const GET: APIRoute = () => json(200, { users: listUsers(getDb()) });
+
+export const POST: APIRoute = async ({ request }) => {
+  let data: { username?: unknown; password?: unknown; role?: unknown };
+  try { data = await request.json(); } catch { return json(400, { error: 'Dati non validi.' }); }
+  const username = String(data.username ?? '').trim();
+  const password = String(data.password ?? '');
+  if (username.length < 2) return json(400, { error: 'Nome utente troppo corto.' });
+  if (password.length < 8) return json(400, { error: 'Password troppo corta (min 8).' });
+  if (!isRole(data.role)) return json(400, { error: 'Ruolo non valido.' });
+  try {
+    const id = createUser(getDb(), username, password, data.role);
+    return json(201, { id });
+  } catch (err: any) {
+    if (String(err?.message).includes('UNIQUE')) return json(400, { error: 'Nome utente già esistente.' });
+    throw err;
+  }
+};

tests/users.test.ts

@@ -0,0 +1,49 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import type Database from 'better-sqlite3';
+import { createDb } from '../src/lib/db';
+import {
+  createUser, countAdmins, getUserById, updateUserRole,
+  updateUserPassword, deleteUser, randomPassword, isRole, hashPassword, verifyPassword,
+} from '../src/lib/auth';
+
+let db: Database.Database;
+beforeEach(() => { db = createDb(':memory:'); });
+
+describe('gestione utenti', () => {
+  it('countAdmins conta i soli admin', () => {
+    createUser(db, 'a1', 'segreta123', 'admin');
+    createUser(db, 's1', 'segreta123', 'superuser');
+    expect(countAdmins(db)).toBe(1);
+  });
+
+  it('updateUserRole e getUserById', () => {
+    const id = createUser(db, 'u1', 'segreta123', 'user');
+    updateUserRole(db, id, 'superuser');
+    expect(getUserById(db, id)!.role).toBe('superuser');
+  });
+
+  it('updateUserPassword cambia l’hash', () => {
+    const id = createUser(db, 'u2', 'vecchia123', 'user');
+    updateUserPassword(db, id, hashPassword('nuova12345'));
+    const hash = (db.prepare('SELECT password_hash AS h FROM users WHERE id = ?').get(id) as { h: string }).h;
+    expect(verifyPassword('nuova12345', hash)).toBe(true);
+  });
+
+  it('deleteUser rimuove', () => {
+    const id = createUser(db, 'u3', 'segreta123', 'user');
+    deleteUser(db, id);
+    expect(getUserById(db, id)).toBeNull();
+  });
+
+  it('randomPassword genera almeno 12 caratteri', () => {
+    expect(randomPassword().length).toBeGreaterThanOrEqual(12);
+  });
+
+  it('isRole valida i ruoli', () => {
+    expect(isRole('admin')).toBe(true);
+    expect(isRole('superuser')).toBe(true);
+    expect(isRole('user')).toBe(true);
+    expect(isRole('editor')).toBe(false);
+    expect(isRole(3)).toBe(false);
+  });
+});