75 lines
3.0 KiB
TypeScript
75 lines
3.0 KiB
TypeScript
import type Database from 'better-sqlite3';
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import bcrypt from 'bcryptjs';
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import { randomBytes } from 'node:crypto';
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export const SESSION_COOKIE = 'session';
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const SESSION_DAYS = 7;
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export type Role = 'admin' | 'superuser' | 'user';
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export function hashPassword(plain: string): string {
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return bcrypt.hashSync(plain, 12);
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}
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export function verifyPassword(plain: string, hash: string): boolean {
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return bcrypt.compareSync(plain, hash);
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}
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export function createUser(db: Database.Database, username: string, password: string, role: Role = 'admin'): number {
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const res = db.prepare('INSERT INTO users (username, password_hash, role) VALUES (?, ?, ?)')
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.run(username, hashPassword(password), role);
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return Number(res.lastInsertRowid);
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}
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export function login(db: Database.Database, username: string, password: string): string | null {
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const user = db.prepare('SELECT * FROM users WHERE username = ?').get(username) as
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| { id: number; password_hash: string } | undefined;
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if (!user || !verifyPassword(password, user.password_hash)) return null;
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const token = randomBytes(32).toString('hex');
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db.prepare(
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`INSERT INTO sessions (token, user_id, expires_at) VALUES (?, ?, datetime('now', '+${SESSION_DAYS} days'))`
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).run(token, user.id);
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return token;
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}
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export function getSessionUser(db: Database.Database, token: string): { id: number; username: string; role: string } | null {
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const row = db.prepare(
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`SELECT s.token, s.expires_at, u.id, u.username, u.role
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FROM sessions s JOIN users u ON u.id = s.user_id WHERE s.token = ?`
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).get(token) as { token: string; expires_at: string; id: number; username: string; role: string } | undefined;
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if (!row) return null;
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if (row.expires_at <= new Date().toISOString().slice(0, 19).replace('T', ' ')) {
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db.prepare('DELETE FROM sessions WHERE token = ?').run(token);
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return null;
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}
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return { id: row.id, username: row.username, role: row.role };
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}
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export function logout(db: Database.Database, token: string): void {
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db.prepare('DELETE FROM sessions WHERE token = ?').run(token);
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}
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// Autorizzazione per prefisso di rotta. L'admin passa sempre; per gli altri, la prima regola
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// che matcha decide; se nessuna regola matcha la rotta è "blog/upload/logout" → consentita a
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// qualsiasi loggato (il middleware protegge solo /admin e /api/admin, quindi qui arrivano solo
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// utenti già autenticati).
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const RULES: [RegExp, Role[]][] = [
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[/^\/admin\/users(\/|$)/, ['admin']],
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[/^\/api\/admin\/users(\/|$)/, ['admin']],
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[/^\/admin\/content(\/|$)/, ['admin', 'superuser']],
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[/^\/api\/admin\/content(\/|$)/, ['admin', 'superuser']],
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];
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export function canAccessAdminPath(role: string, pathname: string): boolean {
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if (role === 'admin') return true;
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for (const [re, roles] of RULES) {
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if (re.test(pathname)) return roles.includes(role as Role);
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}
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return true; // blog, upload, logout, showtags: tutti i loggati
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}
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export function landingFor(role: string): string {
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if (role === 'superuser') return '/admin/content';
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return '/admin';
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}
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