Genesis

src/api/index.js

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+import fs from 'fs';
+import path from 'path';
+import { execSync } from 'child_process';
+import { fileURLToPath, pathToFileURL } from 'url';
+import express from 'express';
+import cookieParser from 'cookie-parser';
+import { loggerMiddleware } from './middleware/logger.js';
+import env from '../config/env.js';
+import { authMiddleware } from './middleware/auth.js';
+import { ensureConnection } from '../db/client.js';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+async function loadRoutes(app, basePath = '') {
+    const routesDir = path.join(__dirname, 'routes');
+
+    async function walk(dir) {
+        for (const file of fs.readdirSync(dir)) {
+            const fullPath = path.join(dir, file);
+            const stat = fs.statSync(fullPath);
+
+            if (stat.isDirectory()) {
+                await walk(fullPath);
+            } else if (file.endsWith('.js')) {
+                const routeModule = await import(pathToFileURL(fullPath).href);
+                if (routeModule.register) {
+                    routeModule.register(app, basePath);
+                }
+            }
+        }
+    }
+
+    await walk(routesDir);
+}
+
+let server;
+let starting;
+let startedAt;
+
+function corsMiddleware(req, res, next) {
+    const origin = req.headers.origin;
+
+    if (origin && env.corsOrigins.includes(origin)) {
+        res.setHeader('Access-Control-Allow-Origin', origin);
+        res.setHeader('Vary', 'Origin');
+        res.setHeader('Access-Control-Allow-Credentials', 'true');
+        res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
+        res.setHeader('Access-Control-Allow-Methods', 'GET,POST,PUT,PATCH,DELETE,OPTIONS');
+    }
+
+    if (req.method === 'OPTIONS') {
+        return res.sendStatus(204);
+    }
+
+    next();
+}
+
+async function createApi() {
+    const app = express();
+
+    app.use(corsMiddleware);
+    app.use(express.json());
+    app.use(cookieParser());
+    app.use(loggerMiddleware);
+    app.use(authMiddleware);
+
+    if (startedAt) {
+        app.use((req, res, next) => {
+            res.setHeader('X-Server-Started-At', startedAt);
+            next();
+        });
+    }
+
+    await loadRoutes(app, '/api');
+
+    return app;
+}
+
+export async function startApi() {
+    if (server) {
+        return server;
+    }
+    if (starting) {
+        return starting;
+    }
+
+    starting = (async () => {
+        await ensureConnection();
+
+        startedAt = new Date().toISOString();
+        const app = await createApi();
+
+        await new Promise((resolve, reject) => {
+            const instance = app.listen(env.port);
+
+            instance.once('listening', () => {
+                server = instance;
+                console.log(`API listening on port ${env.port}`);
+                resolve();
+            });
+
+            instance.once('error', (err) => {
+                if (err.code === 'EADDRINUSE') {
+                    let detail = '';
+                    try {
+                        const pids = execSync(`lsof -ti :${env.port}`, { encoding: 'utf8' }).trim();
+                        if (pids) detail = ` (PID ${pids.replace(/\n/g, ', ')})`;
+                    } catch {
+                        // lsof unavailable or no match
+                    }
+                    console.error(`Port ${env.port} is already in use${detail}. Check with: lsof -i :${env.port}`);
+                } else {
+                    console.error('Server error:', err.message);
+                }
+                reject(err);
+            });
+        });
+
+        return server;
+    })();
+
+    try {
+        return await starting;
+    } finally {
+        starting = undefined;
+    }
+}
+
+export async function stopApi() {
+    if (!server) return;
+    await new Promise((resolve, reject) => {
+        server.close((err) => (err ? reject(err) : resolve()));
+    });
+    server = undefined;
+}

src/api/middleware/auth.js

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+import jwt from 'jsonwebtoken';
+import env from '../../config/env.js';
+import * as db from '../../db/googleAuth.js';
+import { meJson } from '../routes/auth/meJson.js';
+
+const userCache = new Map();
+const USER_CACHE_TTL = 10 * 60 * 1000;
+
+export function getCachedUser(id) {
+    const cached = userCache.get(id);
+    if (cached && cached.expiresAt > Date.now()) {
+        return cached.user;
+    }
+    userCache.delete(id);
+    return null;
+}
+
+export function setCachedUser(id, user) {
+    userCache.set(id, { user, expiresAt: Date.now() + USER_CACHE_TTL });
+    if (userCache.size > 1000) {
+        const now = Date.now();
+        for (const [k, v] of userCache) {
+            if (v.expiresAt <= now) userCache.delete(k);
+        }
+    }
+}
+
+export function clearCachedUser(id) {
+    userCache.delete(id);
+}
+
+function authMeJson(res, req, status, body) {
+    if (req.path === '/api/auth/me') {
+        return meJson(res, status, body);
+    }
+    return res.status(status).json(body);
+}
+
+export const authMiddleware = async (req, res, next) => {
+    if (req.path === '/' || req.path === '/api/auth/login' || req.path === '/api/auth/logout' || req.path === '/api/health') {
+        return next();
+    }
+
+    if (req.path.startsWith('/@') || req.path.startsWith('/node_modules') || req.path.startsWith('/src') || req.path === '/favicon.ico') {
+        return next();
+    }
+
+    const token = req.cookies.token;
+    if (!token) return authMeJson(res, req, 401, { error: 'Unauthorized' });
+
+    try {
+        const decoded = jwt.verify(token, env.jwtSecret);
+
+        let user = getCachedUser(decoded.id);
+        if (!user) {
+            user = db.getAllowedEmailById(decoded.id);
+            if (user) setCachedUser(decoded.id, user);
+        }
+        if (!user) {
+            return authMeJson(res, req, 403, { error: 'User is no longer authorized' });
+        }
+
+        req.user = {
+            id: user.id,
+            email: user.email,
+            ...(decoded.picture && { picture: decoded.picture }),
+        };
+
+        const now = Math.floor(Date.now() / 1000);
+        if (decoded.exp - now < 2 * 60 * 60) {
+            const { iat, exp, ...payload } = decoded;
+            const newToken = jwt.sign(payload, env.jwtSecret, { expiresIn: '1d' });
+            res.cookie('token', newToken, {
+                httpOnly: true,
+                secure: true,
+                sameSite: 'strict',
+                maxAge: 24 * 60 * 60 * 1000,
+            });
+        }
+
+        next();
+    } catch {
+        return authMeJson(res, req, 401, { error: 'Invalid token' });
+    }
+};

src/api/middleware/logger.js

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+import chalk from 'chalk';
+
+export const loggerMiddleware = (req, res, next) => {
+  const start = Date.now();
+  res.on('finish', () => {
+    const duration = Date.now() - start;
+    const method = chalk.bold.blue(req.method.padEnd(7));
+    const url = req.originalUrl;
+    let status = res.statusCode;
+    
+    if (status >= 500) status = chalk.red(status);
+    else if (status >= 400) status = chalk.yellow(status);
+    else if (status >= 300) status = chalk.cyan(status);
+    else status = chalk.green(status);
+
+    console.log(`${method} ${url} ${status} ${chalk.gray(`(${duration}ms)`)}`);
+  });
+  next();
+};

src/api/routes/auth/login.js

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+import jwt from 'jsonwebtoken';
+import { OAuth2Client } from 'google-auth-library';
+import env from '../../../config/env.js';
+import * as db from '../../../db/googleAuth.js';
+
+const googleClient = new OAuth2Client(env.googleClientId);
+
+/**
+ * Registers the login route (Google SSO → JWT cookie session).
+ * @param {import('express').Application} app - Express app
+ * @param {string} [basePath=''] - Optional URL prefix for all routes in this module
+ */
+export function register(app, basePath = '') {
+    /**
+     * @route POST /auth/login
+     * @description Verifies a Google ID token, checks allowlist, and sets an HTTP-only `token` cookie.
+     * @body {string} idToken - Google ID token from Google Identity Services
+     * @returns {Object} 200 - `{ message, user }` with `{ id, email, picture? }` in `user`
+     * @returns {Object} 400 - Missing token or Google client not configured
+     * @returns {Object} 401 - Invalid Google token
+     * @returns {Object} 403 - Email not on allowlist
+     * @returns {Object} 500 - Server error
+     */
+    app.post(`${basePath}/auth/login`, async (req, res) => {
+        try {
+            const { idToken } = req.body;
+            if (!idToken) {
+                return res.status(400).json({ error: 'idToken is required' });
+            }
+
+            if (!env.googleClientId) {
+                return res.status(400).json({ error: 'GOOGLE_CLIENT_ID is not configured' });
+            }
+
+            const ticket = await googleClient.verifyIdToken({
+                idToken,
+                audience: env.googleClientId,
+            });
+            const payload = ticket.getPayload();
+            const email = payload?.email?.toLowerCase();
+
+            if (!email || !payload.email_verified) {
+                return res.status(401).json({ error: 'Invalid Google account' });
+            }
+
+            const allowed = db.getAllowedEmail(email);
+            if (!allowed) {
+                return res.status(403).json({ error: 'Email is not authorized' });
+            }
+
+            const user = {
+                id: allowed.id,
+                email: allowed.email,
+                ...(payload.picture && { picture: payload.picture }),
+            };
+            const token = jwt.sign(user, env.jwtSecret, { expiresIn: '1d' });
+
+            res.cookie('token', token, {
+                httpOnly: true,
+                secure: true,
+                sameSite: 'strict',
+                maxAge: 24 * 60 * 60 * 1000,
+            });
+
+            res.status(200).json({ message: 'Login successful', user });
+        } catch (error) {
+            res.status(401).json({ error: 'Invalid Google token' });
+        }
+    });
+}

src/api/routes/auth/logout.js

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+import jwt from 'jsonwebtoken';
+import env from '../../../config/env.js';
+import { clearCachedUser } from '../../middleware/auth.js';
+
+/**
+ * Registers the logout route (clears session cookie).
+ * @param {import('express').Application} app - Express app
+ * @param {string} [basePath=''] - Optional URL prefix for all routes in this module
+ */
+export function register(app, basePath = '') {
+    /**
+     * @route POST /auth/logout
+     * @description Clears the HTTP-only `token` cookie set at login.
+     * @returns {Object} 200 - `{ message }` confirming logout
+     */
+    app.post(`${basePath}/auth/logout`, (req, res) => {
+        const token = req.cookies.token;
+        if (token) {
+            try {
+                const decoded = jwt.verify(token, env.jwtSecret, { ignoreExpiration: true });
+                if (decoded?.id) {
+                    clearCachedUser(decoded.id);
+                }
+            } catch {
+                // Ignore errors during cache clearing on logout
+            }
+        }
+
+        res.clearCookie('token', {
+            httpOnly: true,
+            secure: true,
+            sameSite: 'strict',
+        });
+        res.status(200).json({ message: 'Logged out successfully' });
+    });
+}

src/api/routes/auth/me.js

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+import { meJson } from './meJson.js';
+
+/**
+ * Registers the current-user route (requires prior auth middleware populating `req.user`).
+ * @param {import('express').Application} app - Express app
+ * @param {string} [basePath=''] - Optional URL prefix for all routes in this module
+ */
+export function register(app, basePath = '') {
+    /**
+     * @route GET /auth/me
+     * @description Returns the authenticated user from `req.user` and the Google client ID.
+     * @returns {Object} 200 - `{ user: { id, email, picture? }, googleClientId }`
+     */
+    app.get(`${basePath}/auth/me`, (req, res) => {
+        const { id, email, picture } = req.user;
+        const user = { id, email, ...(picture && { picture }) };
+        meJson(res, 200, { user });
+    });
+}

src/api/routes/auth/meJson.js

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+import env from '../../../config/env.js';
+
+export function meJson(res, status, body) {
+    return res.status(status).json({ ...body, googleClientId: env.googleClientId });
+}

src/api/routes/health.js

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+import { ensureConnection } from '../../db/client.js';
+
+/**
+ * Registers a database connectivity health check route.
+ * @param {import('express').Application} app - Express app
+ * @param {string} [basePath=''] - Optional URL prefix for all routes in this module
+ */
+export function register(app, basePath = '') {
+    /**
+     * @route GET /health
+     * @description Verifies the database client can establish a connection.
+     * @returns {Object} 200 - `{ ok: true }` when the database is reachable
+     * @returns {Object} 503 - `{ ok: false, error }` when the check fails
+     */
+    app.get(`${basePath}/health`, async (_request, response) => {
+        try {
+            await ensureConnection();
+            response.status(200).json({ ok: true });
+        } catch (error) {
+            response.status(503).json({ ok: false, error: error.message });
+        }
+    });
+}