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accounts.js

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  1. #!/usr/bin/env node
  2. /**
  3. * accounts.js — users, auth sessions, API keys, subscription plans.
  4. *
  5. * Zero-dependency JSON-file store for the Viseca Shopper UI bridge.
  6. * Passwords scrypt (random salt, timing-safe compare)
  7. * Web login opaque bearer-ish cookie token; only its SHA-256 is stored
  8. * API keys vsk_<keyid>_<secret>; only SHA-256(secret) is stored
  9. * Plans free / plus / premium → daily message caps (PLANS_JSON overrides)
  10. *
  11. * Files (under DATA_DIR, default ./data):
  12. * accounts.json { version, users: [...] }
  13. * auth-sessions.json { sessions: { <sha256(token)>: { userId, expires } } }
  14. *
  15. * Stores are tiny; every mutation schedules a debounced atomic save
  16. * (tmp file + rename).
  17. */
  19. const fs = require("fs");
  20. const path = require("path");
  21. const crypto = require("crypto");
  23. const DATA_DIR = process.env.ACCOUNTS_DATA_DIR || path.join(__dirname, "data");
  24. const ACCOUNTS_FILE = path.join(DATA_DIR, "accounts.json");
  25. const SESSIONS_FILE = path.join(DATA_DIR, "auth-sessions.json");
  27. const SESSION_COOKIE = "shopper_session";
  28. const SESSION_TTL_MS = 30 * 24 * 60 * 60 * 1000; // 30 days
  29. const PASSWORD_MIN = 8;
  31. /* ---------- subscription plans ---------- */
  33. const DEFAULT_PLANS = {
  34. free: { label: "Free", daily: 10, price: "CHF 0", note: "10 messages / day" },
  35. plus: { label: "Plus", daily: 100, price: "CHF 9/mo", note: "100 messages / day" },
  36. premium: { label: "Premium", daily: 500, price: "CHF 29/mo", note: "500 messages / day (fair use)" },
  37. };
  39. /** PLANS_JSON env merges over the defaults: '{"free":{"daily":2}}' */
  40. function loadPlans() {
  41. const plans = JSON.parse(JSON.stringify(DEFAULT_PLANS));
  42. const raw = process.env.PLANS_JSON;
  43. if (raw) {
  44. try {
  45. const patch = JSON.parse(raw);
  46. for (const [k, v] of Object.entries(patch)) {
  47. plans[k] = Object.assign(plans[k] || { label: k, price: "—", note: "" }, v);
  48. }
  49. } catch (e) {
  50. throw new Error(`PLANS_JSON is not valid JSON: ${e.message}`);
  51. }
  52. }
  53. return plans;
  54. }
  55. const PLANS = loadPlans();
  56. const PLAN_IDS = Object.keys(PLANS);
  58. const REGISTRATION_OPEN = process.env.REGISTRATION_OPEN !== "false";
  60. /** How many child accounts one parent may create. */
  61. const MAX_CHILDREN = 10;
  63. /* ---------- demo account (pitch/testing) ----------
  64. * Credentials are deliberately NOT in the repo. Set DEMO_PASSWORD to control
  65. * them — it is rotated onto the account on every boot when set (change env →
  66. * restart → previously distributed passwords stop working). If unset on first
  67. * seed, a random password is generated and logged once to the server log. */
  69. const DEMO_ENABLED = process.env.DEMO_MODE !== "false";
  70. const DEMO_EMAIL = (process.env.DEMO_EMAIL || "demo@pixerful.com").toLowerCase();
  71. const DEMO_PASSWORD = (process.env.DEMO_PASSWORD || "").trim();
  72. const DEMO_PLAN = process.env.DEMO_PLAN || "plus";
  74. /* ---------- helpers ---------- */
  76. function sha256(s) { return crypto.createHash("sha256").update(s).digest("hex"); }
  77. function b64url(buf) { return Buffer.from(buf).toString("base64url"); }
  78. function newId(prefix) { return `${prefix}_${crypto.randomBytes(4).toString("hex")}`; }
  80. function hashPassword(password) {
  81. const salt = crypto.randomBytes(16).toString("hex");
  82. const hash = crypto.scryptSync(String(password), salt, 32).toString("hex");
  83. return { salt, hash };
  84. }
  86. function verifyPassword(password, salt, hash) {
  87. try {
  88. const candidate = crypto.scryptSync(String(password), salt, 32);
  89. return crypto.timingSafeEqual(candidate, Buffer.from(hash, "hex"));
  90. } catch {
  91. return false;
  92. }
  93. }
  95. function todayKey() {
  96. return new Date().toISOString().slice(0, 10); // UTC day is fine for caps
  97. }
  99. /* ---------- store plumbing ---------- */
  101. let users = [];
  102. let sessions = {}; // sha256(token) -> { userId, expires }
  104. function load() {
  105. fs.mkdirSync(DATA_DIR, { recursive: true });
  106. if (fs.existsSync(ACCOUNTS_FILE)) {
  107. try {
  108. const parsed = JSON.parse(fs.readFileSync(ACCOUNTS_FILE, "utf8"));
  109. users = Array.isArray(parsed.users) ? parsed.users : [];
  110. } catch (e) {
  111. console.error(`[accounts] could not parse ${ACCOUNTS_FILE}: ${e.message}`);
  112. users = [];
  113. }
  114. }
  115. if (fs.existsSync(SESSIONS_FILE)) {
  116. try {
  117. sessions = JSON.parse(fs.readFileSync(SESSIONS_FILE, "utf8")).sessions || {};
  118. } catch {
  119. sessions = {};
  120. }
  121. }
  122. }
  124. function atomicWrite(file, obj) {
  125. const tmp = `${file}.tmp-${process.pid}`;
  126. fs.writeFileSync(tmp, JSON.stringify(obj, null, 2));
  127. fs.renameSync(tmp, file);
  128. }
  130. let saveTimer = null;
  131. function saveSoon() {
  132. if (saveTimer) return;
  133. saveTimer = setTimeout(flushSync, 400);
  134. }
  136. function flushSync() {
  137. if (saveTimer) { clearTimeout(saveTimer); saveTimer = null; }
  138. try {
  139. atomicWrite(ACCOUNTS_FILE, { version: 1, users });
  140. atomicWrite(SESSIONS_FILE, { sessions });
  141. } catch (e) {
  142. console.error(`[accounts] save failed: ${e.message}`);
  143. }
  144. }
  145. const saveNow = flushSync;
  147. /* flush on exit so a pending 400ms debounce cannot lose a final mutation */
  148. process.on("exit", () => { if (saveTimer) flushSync(); });
  150. function findUser(id) { return users.find((u) => u.id === id) || null; }
  151. const findUserById = findUser; // family.js binds this lookup
  152. function childrenOf(parentId) {
  153. return users.filter((u) => u.parentId === parentId).sort((a, b) => a.created - b.created);
  154. }
  155. function findUserByEmail(email) {
  156. const norm = String(email || "").trim().toLowerCase();
  157. return users.find((u) => u.email === norm) || null;
  158. }
  160. class ApiError extends Error {
  161. constructor(status, message, extra) { super(message); this.status = status; this.extra = extra || {}; }
  162. }
  164. /* ---------- registration / login ---------- */
  166. function createUser({ email, password, name }, opts = {}) {
  167. // Public signup can be closed (REGISTRATION_OPEN=false) — a signed-in parent
  168. // creating a child account is always allowed (opts.parental).
  169. if (!opts.parental && !REGISTRATION_OPEN) throw new ApiError(403, "Registration is currently closed.");
  170. const norm = String(email || "").trim().toLowerCase();
  171. if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(norm)) throw new ApiError(400, "Please provide a valid email address.");
  172. if (!password || String(password).length < PASSWORD_MIN) {
  173. throw new ApiError(400, `Password must be at least ${PASSWORD_MIN} characters.`);
  174. }
  175. if (findUserByEmail(norm)) throw new ApiError(409, "An account with this email already exists — sign in instead.");
  176. const { salt, hash } = hashPassword(password);
  177. const id = newId("u");
  178. const user = {
  179. id,
  180. sid: `${id.replace("u_", "")}`, // agent session-key suffix
  181. email: norm,
  182. name: String(name || "").trim().slice(0, 60) || norm.split("@")[0],
  183. salt,
  184. hash,
  185. plan: "free",
  186. created: Date.now(),
  187. usage: {},
  188. apiKeys: [],
  189. parentId: opts.parentId || null, // set ⇒ child account (parental controls)
  190. };
  191. users.push(user);
  192. saveSoon();
  193. return user;
  194. }
  196. /** A signed-in parent creates a managed child account. The child gets a
  197. * normal login but is governed by the parental limits in family.js and can
  198. * never create children of its own. */
  199. function createChildAccount(parentId, { email, password, name }) {
  200. const parent = findUser(parentId);
  201. if (!parent) throw new ApiError(404, "No such parent account.");
  202. if (parent.parentId) throw new ApiError(403, "A child account cannot create its own sub-accounts.");
  203. if (childrenOf(parentId).length >= MAX_CHILDREN) {
  204. throw new ApiError(409, `Family limit reached — at most ${MAX_CHILDREN} children per parent account.`);
  205. }
  206. return createUser({ email, password, name }, { parentId, parental: true });
  207. }
  209. /** Parent removes a child account entirely: user record + live sessions.
  210. * Family limits/ledger for the child are dropped by the caller (family.js). */
  211. function deleteChildAccount(parentId, childId) {
  212. const child = findUser(childId);
  213. if (!child || child.parentId !== parentId) throw new ApiError(404, "No such child account in your family.");
  214. users = users.filter((u) => u.id !== childId);
  215. let purged = 0;
  216. for (const [h, s] of Object.entries(sessions)) {
  217. if (s && s.userId === childId) { delete sessions[h]; purged += 1; }
  218. }
  219. saveSoon();
  220. return { purgedSessions: purged };
  221. }
  223. function verifyLogin(email, password) {
  224. const user = findUserByEmail(email);
  225. if (!user || !verifyPassword(password, user.salt, user.hash)) return null;
  226. return user;
  227. }
  229. /* ---------- web session cookies ---------- */
  231. function createSession(userId) {
  232. const token = b64url(crypto.randomBytes(32));
  233. sessions[sha256(token)] = { userId, expires: Date.now() + SESSION_TTL_MS };
  234. saveSoon();
  235. return token;
  236. }
  238. function destroySession(token) {
  239. if (token && sessions[sha256(token)]) { delete sessions[sha256(token)]; saveSoon(); }
  240. }
  242. function pruneSessions() {
  243. const now = Date.now();
  244. let dirty = false;
  245. for (const [h, s] of Object.entries(sessions)) {
  246. if (!s || s.expires < now) { delete sessions[h]; dirty = true; }
  247. }
  248. if (dirty) saveSoon();
  249. }
  251. function userBySessionToken(token) {
  252. if (!token) return null;
  253. const rec = sessions[sha256(token)];
  254. if (!rec || rec.expires < Date.now()) return null;
  255. return findUser(rec.userId);
  256. }
  258. function parseCookies(header) {
  259. const out = {};
  260. String(header || "").split(";").forEach((part) => {
  261. const i = part.indexOf("=");
  262. if (i > 0) {
  263. try { out[part.slice(0, i).trim()] = decodeURIComponent(part.slice(i + 1).trim()); }
  264. catch { out[part.slice(0, i).trim()] = part.slice(i + 1).trim(); }
  265. }
  266. });
  267. return out;
  268. }
  270. /* SameSite=None over https so the session also works when the site is embedded
  271. * in an iframe (Lax cookies are never sent from cross-site frames — the bug that
  272. * made iframe logins bounce straight back to the gate); plain-http LAN access
  273. * keeps Lax (None requires Secure). */
  274. function sessionCookieHeader(token, secure) {
  275. const site = secure ? "SameSite=None; Secure" : "SameSite=Lax";
  276. return `${SESSION_COOKIE}=${token}; Path=/; HttpOnly; ${site}; Max-Age=${Math.floor(SESSION_TTL_MS / 1000)}`;
  277. }
  278. function clearedSessionCookieHeader(secure) {
  279. const site = secure ? "SameSite=None; Secure" : "SameSite=Lax";
  280. return `${SESSION_COOKIE}=; Path=/; HttpOnly; ${site}; Max-Age=0`;
  281. }
  283. /* ---------- API keys (external surfaces: ChatGPT, Claude, OpenClaw) ---------- */
  285. function createApiKey(userId, name) {
  286. const user = findUser(userId);
  287. if (!user) throw new ApiError(404, "No such user.");
  288. const keyId = crypto.randomBytes(4).toString("hex");
  289. const secret = b64url(crypto.randomBytes(24));
  290. const rec = { id: keyId, name: String(name || "").trim().slice(0, 40) || "api key", hash: sha256(secret), created: Date.now(), lastUsed: null, revoked: false };
  291. user.apiKeys.push(rec);
  292. saveSoon();
  293. return { key: `vsk_${keyId}_${secret}`, record: rec };
  294. }
  296. function userByApiKey(rawKey) {
  297. const m = /^vsk_([0-9a-f]{8})_([A-Za-z0-9_-]+)$/.exec(String(rawKey || "").trim());
  298. if (!m) return null;
  299. const [, keyId, secret] = m;
  300. for (const user of users) {
  301. const rec = (user.apiKeys || []).find((k) => k.id === keyId && !k.revoked);
  302. if (rec && crypto.timingSafeEqual(Buffer.from(rec.hash, "hex"), Buffer.from(sha256(secret), "hex"))) {
  303. rec.lastUsed = Date.now();
  304. saveSoon();
  305. return { user, key: rec };
  306. }
  307. }
  308. return null;
  309. }
  311. function revokeApiKey(userId, keyId) {
  312. const user = findUser(userId);
  313. const rec = user && (user.apiKeys || []).find((k) => k.id === keyId && !k.revoked);
  314. if (!rec) return false;
  315. rec.revoked = true;
  316. saveSoon();
  317. return true;
  318. }
  320. /* ---------- plans & usage ---------- */
  322. function setPlan(userId, plan) {
  323. const user = findUser(userId);
  324. if (!user) throw new ApiError(404, "No such user.");
  325. if (!PLANS[plan]) throw new ApiError(400, `Unknown plan '${plan}'. Choose one of: ${PLAN_IDS.join(", ")}.`);
  326. user.plan = plan;
  327. saveSoon();
  328. return user;
  329. }
  331. /** First-run onboarding: mark the welcome wizard as done so it never opens
  332. * again (idempotent — any exit path from the wizard calls this once). */
  333. function markOnboarded(userId) {
  334. const user = findUser(userId);
  335. if (!user) throw new ApiError(404, "No such user.");
  336. if (!user.onboardedAt) user.onboardedAt = Date.now();
  337. saveSoon();
  338. return user;
  339. }
  341. /** Count one message against the plan's daily cap. */
  342. function countMessage(userId) {
  343. const user = findUser(userId);
  344. if (!user) throw new ApiError(401, "Not signed in.");
  345. const plan = PLANS[user.plan] || PLANS.free;
  346. const today = todayKey();
  347. if (user.usage[today] === undefined) {
  348. user.usage = { [today]: 0 }; // drop old days
  349. }
  350. if (user.unlimited) {
  351. user.usage[today] += 1; // tracked for display only — never capped
  352. saveSoon();
  353. return { ok: true, used: user.usage[today], limit: null, plan };
  354. }
  355. if (user.usage[today] >= plan.daily) {
  356. return { ok: false, used: user.usage[today], limit: plan.daily, plan };
  357. }
  358. user.usage[today] += 1;
  359. saveSoon();
  360. return { ok: true, used: user.usage[today], limit: plan.daily, plan };
  361. }
  363. function usageInfo(user) {
  364. const plan = PLANS[user.plan] || PLANS.free;
  365. const used = user.usage[todayKey()] || 0;
  366. if (user.unlimited) {
  367. return { plan: user.plan, planLabel: plan.label, used, limit: null, remaining: null };
  368. }
  369. return { plan: user.plan, planLabel: plan.label, used, limit: plan.daily, remaining: Math.max(0, plan.daily - used) };
  370. }
  372. /** Seed (once) and keep the demo account in shape. Returns null when demo
  373. * mode is disabled. Password: DEMO_PASSWORD env wins and is force-rotated on
  374. * every boot; otherwise a random one is generated on first seed and logged
  375. * once. The seeded API key's full value is logged once too. */
  376. function ensureDemoAccount() {
  377. if (!DEMO_ENABLED) return null;
  378. if (!PLANS[DEMO_PLAN]) throw new Error(`DEMO_PLAN '${DEMO_PLAN}' is not a known plan.`);
  379. let user = findUserByEmail(DEMO_EMAIL);
  380. const created = !user;
  381. let generatedPassword = null;
  382. let rotated = false;
  383. if (created) {
  384. const pw = DEMO_PASSWORD || crypto.randomBytes(12).toString("base64url");
  385. if (!DEMO_PASSWORD) generatedPassword = pw;
  386. user = createUser({ email: DEMO_EMAIL, password: pw, name: "Demo Shopper" });
  387. } else if (DEMO_PASSWORD) {
  388. if (DEMO_PASSWORD.length >= PASSWORD_MIN) {
  389. const { salt, hash } = hashPassword(DEMO_PASSWORD);
  390. user.salt = salt;
  391. user.hash = hash;
  392. rotated = true;
  393. } else {
  394. console.warn(`[accounts] DEMO_PASSWORD ignored — must be at least ${PASSWORD_MIN} characters.`);
  395. }
  396. }
  397. user.demo = true;
  398. user.plan = DEMO_PLAN;
  399. let seeded = null;
  400. if (created) {
  401. seeded = createApiKey(user.id, "demo seed");
  402. console.log(`[accounts] demo account ready: ${DEMO_EMAIL} · plan ${DEMO_PLAN}${seeded ? ` · seeded API key: ${seeded.key}` : ""}`);
  403. if (generatedPassword) console.log(`[accounts] demo password (shown once — share privately): ${generatedPassword}`);
  404. } else if (rotated) {
  405. console.log(`[accounts] demo password rotated to the DEMO_PASSWORD env value.`);
  406. }
  407. saveSoon();
  408. return { created, user, apiKey: seeded ? seeded.key : null };
  409. }
  411. /** Optional always-on demo guest with no message cap: DUMMY_EMAIL/DUMMY_PASSWORD
  412. * env seed it at boot (created once; unlimited flag re-asserted every boot).
  413. * Returns null when DUMMY_EMAIL is unset. */
  414. function ensureDummyAccount() {
  415. const email = (process.env.DUMMY_EMAIL || "").trim().toLowerCase();
  416. if (!email) return null;
  417. const password = (process.env.DUMMY_PASSWORD || "").trim();
  418. let user = findUserByEmail(email);
  419. if (!user) {
  420. if (password.length < PASSWORD_MIN) {
  421. console.warn(`[accounts] DUMMY_EMAIL set but DUMMY_PASSWORD missing/too short — dummy account not created.`);
  422. return null;
  423. }
  424. user = createUser({ email, password, name: "Demo Guest" });
  425. console.log(`[accounts] dummy account ready: ${email} (unlimited)`);
  426. }
  427. user.unlimited = true;
  428. saveSoon();
  429. return user;
  430. }
  432. /** Safe projection of a user for the client. */
  433. function publicUser(user) {
  434. return {
  435. id: user.id,
  436. email: user.email,
  437. name: user.name,
  438. plan: user.plan,
  439. planLabel: (PLANS[user.plan] || PLANS.free).label,
  440. isDemo: Boolean(user.demo),
  441. onboarded: Boolean(user.onboardedAt), // false ⇒ client shows the first-run wizard
  442. parentId: user.parentId || null,
  443. usage: usageInfo(user),
  444. created: user.created,
  445. apiKeys: (user.apiKeys || [])
  446. .filter((k) => !k.revoked)
  447. .map((k) => ({ id: k.id, name: k.name, created: k.created, lastUsed: k.lastUsed, masked: `vsk_${k.id}_…` })),
  448. };
  449. }
  451. module.exports = {
  452. ApiError,
  453. PLANS, PLAN_IDS, REGISTRATION_OPEN, MAX_CHILDREN,
  454. SESSION_COOKIE,
  455. load, pruneSessions, ensureDemoAccount, ensureDummyAccount,
  456. createUser, createChildAccount, deleteChildAccount, childrenOf, findUserById, findUserByEmail, verifyLogin,
  457. createSession, destroySession, userBySessionToken,
  458. parseCookies, sessionCookieHeader, clearedSessionCookieHeader,
  459. createApiKey, userByApiKey, revokeApiKey,
  460. setPlan, markOnboarded, countMessage, usageInfo, publicUser,
  461. };