Delete server.js
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server.js
421
server.js
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const express = require('express');
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const session = require('express-session');
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const bcrypt = require('bcryptjs');
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const multer = require('multer');
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const rateLimit = require('express-rate-limit');
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const crypto = require('crypto');
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const fs = require('fs');
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const path = require('path');
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const PORT = process.env.PORT || 3210;
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// 127.0.0.1 by default: on a VPS, Nginx fronts this with TLS and is the only
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// thing that should be reachable from outside. On the old local-Windows setup
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// this was 0.0.0.0 for LAN access; set HOST=0.0.0.0 explicitly if you still
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// need that. COOKIE_SECURE should be "true" once you're behind real HTTPS.
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const HOST = process.env.HOST || '127.0.0.1';
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const COOKIE_SECURE = process.env.COOKIE_SECURE === 'true';
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const DATA_FILE = path.join(__dirname, 'data.json');
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const PID_FILE = path.join(__dirname, 'server.pid');
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const FRONTEND_DIST = path.join(__dirname, '..', 'frontend', 'dist');
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const UPLOADS_DIR = path.join(__dirname, 'uploads');
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const AUTH_FILE = path.join(__dirname, 'auth.json');
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const DEFAULT_USERNAME = 'admin';
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const DEFAULT_PASSWORD = 'admin123';
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if (!fs.existsSync(UPLOADS_DIR)) fs.mkdirSync(UPLOADS_DIR, { recursive: true });
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/* --------------------------------- auth ---------------------------------- */
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function loadAuth() {
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if (!fs.existsSync(AUTH_FILE)) {
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const auth = { username: DEFAULT_USERNAME, passwordHash: bcrypt.hashSync(DEFAULT_PASSWORD, 10) };
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fs.writeFileSync(AUTH_FILE, JSON.stringify(auth, null, 2), 'utf8');
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return auth;
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}
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try {
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return JSON.parse(fs.readFileSync(AUTH_FILE, 'utf8'));
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} catch (e) {
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const auth = { username: DEFAULT_USERNAME, passwordHash: bcrypt.hashSync(DEFAULT_PASSWORD, 10) };
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fs.writeFileSync(AUTH_FILE, JSON.stringify(auth, null, 2), 'utf8');
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return auth;
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}
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}
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function saveAuth(auth) {
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fs.writeFileSync(AUTH_FILE, JSON.stringify(auth, null, 2), 'utf8');
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}
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/* ------------------------------ secret / crypto -------------------------- */
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// Used to encrypt the DeepSeek API key (and anything else sensitive) at
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// rest, so it isn't sitting around the filesystem as plain text.
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const SECRET_KEY_FILE = path.join(__dirname, '.secret-key');
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function getSecretKey() {
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if (!fs.existsSync(SECRET_KEY_FILE)) {
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const key = crypto.randomBytes(32);
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fs.writeFileSync(SECRET_KEY_FILE, key.toString('base64'), { encoding: 'utf8', mode: 0o600 });
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return key;
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}
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return Buffer.from(fs.readFileSync(SECRET_KEY_FILE, 'utf8').trim(), 'base64');
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}
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const SECRET_KEY = getSecretKey();
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function encrypt(text) {
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if (!text) return '';
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const iv = crypto.randomBytes(12);
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const cipher = crypto.createCipheriv('aes-256-gcm', SECRET_KEY, iv);
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const encrypted = Buffer.concat([cipher.update(text, 'utf8'), cipher.final()]);
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const tag = cipher.getAuthTag();
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return Buffer.concat([iv, tag, encrypted]).toString('base64');
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}
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function decrypt(b64) {
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if (!b64) return '';
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try {
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const buf = Buffer.from(b64, 'base64');
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const iv = buf.subarray(0, 12);
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const tag = buf.subarray(12, 28);
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const encrypted = buf.subarray(28);
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const decipher = crypto.createDecipheriv('aes-256-gcm', SECRET_KEY, iv);
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decipher.setAuthTag(tag);
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return Buffer.concat([decipher.update(encrypted), decipher.final()]).toString('utf8');
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} catch (e) {
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return '';
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}
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}
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/* --------------------------------- AI config ------------------------------ */
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const AI_CONFIG_FILE = path.join(__dirname, 'ai-config.json');
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// Lets you point this at a different OpenAI-compatible endpoint if needed
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// (e.g. testing against a mock server); defaults to the real DeepSeek API.
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const DEEPSEEK_API_BASE = process.env.DEEPSEEK_API_BASE || 'https://api.deepseek.com';
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function loadAiConfig() {
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try {
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const raw = JSON.parse(fs.readFileSync(AI_CONFIG_FILE, 'utf8'));
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return { apiKey: decrypt(raw.apiKeyEnc || '') };
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} catch (e) {
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return { apiKey: '' };
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}
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}
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function saveAiConfig(apiKey) {
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fs.writeFileSync(AI_CONFIG_FILE, JSON.stringify({ apiKeyEnc: encrypt(apiKey) }, null, 2), 'utf8');
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}
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const REGION_LABELS = {
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africa: 'Africa', middle_east: 'Middle East', australia: 'Australia/Oceania',
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europe: 'Europe', sea: 'Southeast Asia', other: 'Other',
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};
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function buildCustomerContext(c) {
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const lines = [];
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lines.push(`Company: ${c.company || '(unknown / not on file)'}`);
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if (c.contact) lines.push(`Contact person: ${c.contact}`);
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const place = [c.country, REGION_LABELS[c.region]].filter(Boolean).join(', ');
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if (place) lines.push(`Location: ${place}`);
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if (c.productLines && c.productLines.length) lines.push(`Product interest: ${c.productLines.join(', ')}`);
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if (c.intendedModel || c.intendedQty) {
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lines.push(`Specific model interest: ${c.intendedModel || '(model unspecified)'}${c.intendedQty ? `, quantity: ${c.intendedQty}` : ''}`);
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}
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if (c.lastContact) lines.push(`Last contact date: ${c.lastContact}`);
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if (c.notes) lines.push(`Background research on this customer: ${c.notes}`);
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if (c.tags) lines.push(`Additional remarks: ${c.tags}`);
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if (c.isVip) lines.push('This is a VIP / priority customer — extra attentive tone.');
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if (c.hasOrdered) lines.push('This customer has already placed an order before — this follow-up is with an existing buyer, not a cold lead.');
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return lines.join('\n');
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}
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async function callDeepSeek(apiKey, messages) {
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const resp = await fetch(`${DEEPSEEK_API_BASE}/chat/completions`, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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Authorization: `Bearer ${apiKey}`,
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},
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body: JSON.stringify({
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model: 'deepseek-v4-flash',
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messages,
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temperature: 0.7,
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max_tokens: 600,
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}),
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});
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if (!resp.ok) {
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const errText = await resp.text().catch(() => '');
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throw new Error(`DeepSeek API error ${resp.status}: ${errText.slice(0, 200)}`);
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}
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const data = await resp.json();
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const content = data.choices && data.choices[0] && data.choices[0].message && data.choices[0].message.content;
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if (!content) throw new Error('DeepSeek API returned an empty response');
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return content;
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}
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/* ------------------------------ data file ------------------------------ */
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function readData() {
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try {
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return JSON.parse(fs.readFileSync(DATA_FILE, 'utf8'));
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} catch (e) {
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return {};
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}
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}
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function writeData(data) {
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// write to a temp file then rename, avoids corrupting data.json if the
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// process is killed mid-write
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const tmp = DATA_FILE + '.tmp';
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fs.writeFileSync(tmp, JSON.stringify(data, null, 2), 'utf8');
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fs.renameSync(tmp, DATA_FILE);
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}
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// only allow simple ids (our customer ids are like "c_169..._ab12c"),
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// this keeps the upload path from ever escaping the uploads/ folder
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function safeId(id) {
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return /^[A-Za-z0-9_-]+$/.test(id) ? id : null;
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}
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/* --------------------------------- app ---------------------------------- */
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const app = express();
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// behind Nginx, Express needs this to read X-Forwarded-* correctly —
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// otherwise req.ip is always Nginx's own address (breaks rate limiting)
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// and the "secure" cookie flag can't tell the request was HTTPS.
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app.set('trust proxy', 1);
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app.use(express.json({ limit: '10mb' }));
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app.use(session({
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secret: crypto.randomBytes(32).toString('hex'),
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resave: false,
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saveUninitialized: false,
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cookie: {
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httpOnly: true,
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sameSite: 'lax',
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secure: COOKIE_SECURE,
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maxAge: 30 * 24 * 60 * 60 * 1000, // 30 days
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},
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}));
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function requireAuth(req, res, next) {
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if (req.session && req.session.authed) return next();
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res.status(401).json({ error: 'not authenticated' });
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}
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const loginLimiter = rateLimit({
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windowMs: 15 * 60 * 1000,
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max: 5,
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standardHeaders: true,
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legacyHeaders: false,
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message: { error: 'too many login attempts, please try again in a few minutes' },
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});
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/* -------------------------------- auth api ------------------------------- */
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app.post('/api/auth/login', loginLimiter, (req, res) => {
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const body = req.body || {};
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const username = body.username || '';
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const password = body.password || '';
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const auth = loadAuth();
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if (username === auth.username && bcrypt.compareSync(password, auth.passwordHash)) {
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req.session.authed = true;
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req.session.username = username;
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return res.json({ ok: true, username });
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}
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res.status(401).json({ error: 'invalid credentials' });
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});
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app.post('/api/auth/logout', (req, res) => {
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if (req.session) {
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req.session.destroy(() => res.json({ ok: true }));
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} else {
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res.json({ ok: true });
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}
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});
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app.get('/api/auth/check', (req, res) => {
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const authed = !!(req.session && req.session.authed);
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res.json({ authed, username: authed ? req.session.username : null });
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});
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app.post('/api/auth/change-password', requireAuth, (req, res) => {
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const body = req.body || {};
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const currentPassword = body.currentPassword || '';
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const newPassword = body.newPassword || '';
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const auth = loadAuth();
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if (!bcrypt.compareSync(currentPassword, auth.passwordHash)) {
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return res.status(400).json({ error: 'current password is incorrect' });
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}
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if (newPassword.length < 4) {
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return res.status(400).json({ error: 'new password is too short' });
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}
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auth.passwordHash = bcrypt.hashSync(newPassword, 10);
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saveAuth(auth);
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res.json({ ok: true });
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});
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/* ------------------------------ storage api ------------------------------ */
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app.get('/api/storage/:key', requireAuth, (req, res) => {
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const data = readData();
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const key = req.params.key;
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if (!(key in data)) return res.status(404).json({ error: 'not found' });
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res.json({ value: data[key] });
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});
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app.put('/api/storage/:key', requireAuth, (req, res) => {
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const data = readData();
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data[req.params.key] = req.body.value;
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writeData(data);
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res.json({ ok: true });
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});
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/* --------------------------------- ai api --------------------------------- */
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app.get('/api/ai-config', requireAuth, (req, res) => {
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const cfg = loadAiConfig();
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res.json({ hasKey: !!cfg.apiKey });
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});
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app.put('/api/ai-config', requireAuth, (req, res) => {
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const apiKey = ((req.body && req.body.apiKey) || '').trim();
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if (!apiKey) return res.status(400).json({ error: 'apiKey is required' });
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saveAiConfig(apiKey);
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res.json({ ok: true });
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});
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app.delete('/api/ai-config', requireAuth, (req, res) => {
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try { fs.unlinkSync(AI_CONFIG_FILE); } catch (e) {}
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res.json({ ok: true });
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});
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app.post('/api/ai-config/test', requireAuth, async (req, res) => {
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const cfg = loadAiConfig();
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if (!cfg.apiKey) return res.status(400).json({ error: 'no API key configured' });
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try {
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const content = await callDeepSeek(cfg.apiKey, [{ role: 'user', content: 'Reply with exactly: OK' }]);
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res.json({ ok: true, reply: content.trim() });
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} catch (e) {
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res.status(400).json({ error: e.message });
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}
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});
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const aiLimiter = rateLimit({
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windowMs: 10 * 60 * 1000,
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max: 30,
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standardHeaders: true,
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legacyHeaders: false,
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message: { error: 'too many AI requests, please slow down' },
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});
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app.post('/api/ai/draft', requireAuth, aiLimiter, async (req, res) => {
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const body = req.body || {};
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const customerId = body.customerId;
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const channel = body.channel;
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if (!customerId || !['email', 'whatsapp'].includes(channel)) {
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return res.status(400).json({ error: 'invalid request' });
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}
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const cfg = loadAiConfig();
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if (!cfg.apiKey) return res.status(400).json({ error: 'DeepSeek API key not configured' });
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const data = readData();
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let customers = [];
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try { customers = JSON.parse(data['crm:customers'] || '[]'); } catch (e) {}
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const customer = customers.find((c) => c.id === customerId);
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if (!customer) return res.status(404).json({ error: 'customer not found' });
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const context = buildCustomerContext(customer);
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const systemPrompt = 'You are a sales assistant helping a B2B export salesperson at a Chinese power-equipment company (UPS systems, rectifiers, solar inverters, battery storage) write natural, professional follow-up outreach to overseas customers. Always write in English. Never sound like a generic template, reference specifics from the customer info given. Output only the requested content, with no meta-commentary, explanations, or markdown formatting.';
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const userPrompt = channel === 'email'
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? `Customer info:\n${context}\n\nWrite a short, warm but professional follow-up email to this customer. Respond in EXACTLY this format with no extra text:\nSUBJECT: <subject line>\nBODY:\n<email body, 3-5 short paragraphs max, sign off with "[Your name]">`
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: `Customer info:\n${context}\n\nWrite a short, casual WhatsApp message to check in with this customer (2-4 sentences, friendly tone, no formal greeting like "Dear", a light emoji is fine if it feels natural). Respond with ONLY the message text, nothing else.`;
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try {
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const content = await callDeepSeek(cfg.apiKey, [
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{ role: 'system', content: systemPrompt },
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{ role: 'user', content: userPrompt },
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]);
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if (channel === 'email') {
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const subjectMatch = content.match(/SUBJECT:\s*(.+)/i);
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const bodyMatch = content.match(/BODY:\s*([\s\S]*)/i);
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res.json({
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subject: subjectMatch ? subjectMatch[1].trim() : 'Following up',
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body: bodyMatch ? bodyMatch[1].trim() : content.trim(),
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});
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} else {
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res.json({ body: content.trim() });
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}
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} catch (e) {
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res.status(502).json({ error: e.message });
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}
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});
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/* ------------------------- communication attachments ------------------------- */
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const upload = multer({
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storage: multer.diskStorage({
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destination: (req, file, cb) => {
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const cid = safeId(req.params.customerId);
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if (!cid) return cb(new Error('invalid customer id'));
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const dir = path.join(UPLOADS_DIR, cid);
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fs.mkdirSync(dir, { recursive: true });
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cb(null, dir);
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},
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filename: (req, file, cb) => {
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const ts = Date.now();
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const rand = Math.random().toString(36).slice(2, 8);
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const ext = path.extname(file.originalname).slice(0, 10);
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cb(null, `${ts}_${rand}${ext}`);
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},
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}),
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limits: { fileSize: 25 * 1024 * 1024 }, // 25MB per file
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});
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app.post('/api/uploads/:customerId', requireAuth, (req, res) => {
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if (!safeId(req.params.customerId)) return res.status(400).json({ error: 'invalid customer id' });
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upload.single('file')(req, res, (err) => {
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if (err) return res.status(400).json({ error: err.message });
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if (!req.file) return res.status(400).json({ error: 'no file received' });
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res.json({ fileName: req.file.filename, originalName: req.file.originalname, size: req.file.size });
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});
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});
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app.delete('/api/uploads/:customerId/:fileName', requireAuth, (req, res) => {
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const cid = safeId(req.params.customerId);
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const fname = req.params.fileName;
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const isSafeFile = fname && !fname.includes('..') && !fname.includes('/') && !fname.includes('\\');
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if (!cid || !isSafeFile) return res.status(400).json({ error: 'invalid request' });
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fs.unlink(path.join(UPLOADS_DIR, cid, fname), () => {
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// a missing file is also treated as success, so clicking delete twice never errors
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res.json({ ok: true });
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});
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});
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app.use('/uploads', requireAuth, express.static(UPLOADS_DIR));
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app.use(express.static(FRONTEND_DIST));
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app.get('*', (req, res) => {
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res.sendFile(path.join(FRONTEND_DIST, 'index.html'));
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});
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/* ------------------------------- bootstrap ------------------------------ */
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loadAuth(); // make sure auth.json exists with default credentials on first run
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fs.writeFileSync(PID_FILE, String(process.pid), 'utf8');
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process.on('exit', () => {
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try { fs.unlinkSync(PID_FILE); } catch (e) {}
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});
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process.on('SIGINT', () => process.exit(0));
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process.on('SIGTERM', () => process.exit(0));
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const server = app.listen(PORT, HOST, () => {
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console.log(`[customer-crm] running at http://${HOST}:${PORT}`);
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});
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server.on('error', (e) => {
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if (e.code === 'EADDRINUSE') {
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console.log('[customer-crm] another instance is already running on this port, exiting.');
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try { fs.unlinkSync(PID_FILE); } catch (err) {}
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process.exit(0);
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}
|
||||
throw e;
|
||||
});
|
||||
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Reference in New Issue