499 lines
21 KiB
JavaScript
499 lines
21 KiB
JavaScript
#!/usr/bin/env node
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'use strict';
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/**
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* WhatsApp MCP Server (JSON-RPC 2.0 over stdio) — Baileys edition.
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*
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* Runs INSIDE the user's per-user container (blueprint §6/§7). Unlike the old
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* whatsapp-web.js server, this one uses `@whiskeysockets/baileys`: a pure-WebSocket
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* WhatsApp multi-device client with **no browser** — so it fits the slim
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* `skald-runtime` image (node, no Chromium) and needs no puppeteer self-healing.
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*
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* ── Interactive login contract (the generic §15 seam) ───────────────────────────
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* A per-user connector that needs an interactive login exposes ONE standard tool,
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* `login_status`, that Skald's login API calls directly (never the agent). It
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* returns a small JSON object the login panel renders:
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*
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* { "state": "connecting" | "need_scan" | "ready" | "logged_out",
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* "qr": "data:image/png;base64,…" // present only while state == need_scan
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* "message": "human-readable line" }
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*
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* The panel polls it; when `state == "ready"` Skald flips the connector's
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* `auth_state` to `ready`. WhatsApp's credential is the persisted session on disk
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* (`./auth/`, under the bind-mounted home → survives a container recreate), not a
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* token — so there is nothing to paste back, only a QR to scan.
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*/
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// Baileys uses the Web Crypto global (`crypto.subtle`), which Node only exposes as
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// `globalThis.crypto` from v20+. The container ships Node 18 (Debian bookworm), so
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// polyfill it from `node:crypto` — without this, the socket dies on connect with
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// "crypto is not defined" and never reaches the QR.
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const nodeCrypto = require('crypto');
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if (!globalThis.crypto) globalThis.crypto = nodeCrypto.webcrypto;
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const fs = require('fs');
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const path = require('path');
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const readline = require('readline');
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const qrcode = require('qrcode');
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let makeWASocket, useMultiFileAuthState, DisconnectReason, fetchLatestBaileysVersion, jidNormalizedUser;
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try {
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const baileys = require('@whiskeysockets/baileys');
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makeWASocket = baileys.default || baileys.makeWASocket;
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useMultiFileAuthState = baileys.useMultiFileAuthState;
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DisconnectReason = baileys.DisconnectReason;
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fetchLatestBaileysVersion = baileys.fetchLatestBaileysVersion;
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jidNormalizedUser = baileys.jidNormalizedUser;
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} catch (e) {
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process.stderr.write(`[whatsapp_mcp] FATAL: baileys not installed (${e.message}). Run npm install.\n`);
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}
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// ── Paths ──────────────────────────────────────────────────────────────────
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// Everything hangs off __dirname (the connector dir inside the container home,
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// `~/.skald/mcp/<name>/`), which is bind-mounted and therefore durable.
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const AUTH_DIR = path.join(__dirname, 'auth'); // multi-file auth state (the "session")
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const MEDIA_DIR = path.join(__dirname, 'media');
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function log(msg) { process.stderr.write(`[whatsapp_mcp] ${msg}\n`); }
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// A silent logger: Baileys requires one, and anything it prints must never reach
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// stdout (that channel is reserved for JSON-RPC framing).
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const silentLogger = (() => {
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const noop = () => {};
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const l = { level: 'silent', trace: noop, debug: noop, info: noop, warn: noop, error: noop, fatal: noop };
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l.child = () => l;
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return l;
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})();
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// ── Connection state ─────────────────────────────────────────────────────────
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// connecting – socket starting or reconnecting
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// need_scan – a QR is available; the user must scan it
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// ready – authenticated and connected; tools operational
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// logged_out – the phone unlinked this device; a fresh QR + scan is required
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let state = 'connecting';
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let sock = null;
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let curQr = null; // latest raw QR string (null once scanned / connected)
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let meJid = null;
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let starting = false;
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// ── Lightweight in-memory store ───────────────────────────────────────────────
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// Baileys keeps no chat/contact store of its own; we build a minimal one from the
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// history-sync event and live upserts. It lives for the process lifetime — enough
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// for "what's going on now", not a full archive.
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const chats = new Map(); // jid -> { id, name, unread, conversationTimestamp }
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const contacts = new Map(); // jid -> { id, name }
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const messages = new Map(); // jid -> [ { id, fromMe, ts, text, author } ] (capped)
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const MAX_MSGS_PER_CHAT = 200;
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function pushMessage(jid, m) {
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if (!jid) return;
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let arr = messages.get(jid);
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if (!arr) { arr = []; messages.set(jid, arr); }
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arr.push(m);
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if (arr.length > MAX_MSGS_PER_CHAT) arr.splice(0, arr.length - MAX_MSGS_PER_CHAT);
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}
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function contactName(jid) {
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const c = contacts.get(jid);
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if (c && c.name) return c.name;
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const ch = chats.get(jid);
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if (ch && ch.name) return ch.name;
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return jid ? jid.split('@')[0] : 'unknown';
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}
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function textOf(msg) {
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const m = msg.message;
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if (!m) return '';
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return (
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m.conversation ||
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m.extendedTextMessage?.text ||
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m.imageMessage?.caption ||
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m.videoMessage?.caption ||
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m.documentMessage?.caption ||
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(m.imageMessage ? '[image]' : '') ||
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(m.videoMessage ? '[video]' : '') ||
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(m.audioMessage ? '[audio]' : '') ||
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(m.documentMessage ? '[document]' : '') ||
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(m.stickerMessage ? '[sticker]' : '') ||
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''
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);
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}
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// ── WhatsApp socket lifecycle ──────────────────────────────────────────────────
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async function startSock() {
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if (starting) return;
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starting = true;
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try {
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if (!makeWASocket) { state = 'connecting'; return; }
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fs.mkdirSync(AUTH_DIR, { recursive: true });
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const { state: authState, saveCreds } = await useMultiFileAuthState(AUTH_DIR);
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let version;
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try { ({ version } = await fetchLatestBaileysVersion()); } catch (_) { /* baileys default */ }
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sock = makeWASocket({
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version,
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auth: authState,
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logger: silentLogger,
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browser: ['Skald', 'Chrome', '1.0.0'],
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syncFullHistory: false,
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markOnlineOnConnect: false,
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generateHighQualityLinkPreview: false,
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});
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sock.ev.on('creds.update', saveCreds);
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sock.ev.on('connection.update', (u) => {
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const { connection, lastDisconnect, qr } = u;
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if (qr) { curQr = qr; state = 'need_scan'; log('QR ready — awaiting scan'); }
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if (connection === 'open') {
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curQr = null;
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state = 'ready';
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meJid = sock?.user?.id ? jidNormalizedUser(sock.user.id) : null;
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log('connection open — ready');
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}
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if (connection === 'close') {
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const code = lastDisconnect?.error?.output?.statusCode;
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if (code === DisconnectReason.loggedOut) {
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state = 'logged_out';
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curQr = null;
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log('logged out by phone — clearing session');
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try { fs.rmSync(AUTH_DIR, { recursive: true, force: true }); } catch (_) {}
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// Re-init so a fresh QR is produced immediately.
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starting = false;
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setTimeout(() => startSock(), 500);
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} else {
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state = 'connecting';
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log(`connection closed (code ${code ?? '?'}) — reconnecting`);
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starting = false;
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setTimeout(() => startSock(), 1500);
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}
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}
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});
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// Initial history sync: chats, contacts and a batch of messages.
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sock.ev.on('messaging-history.set', ({ chats: hc, contacts: hcs, messages: hm }) => {
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for (const c of hc || []) {
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chats.set(c.id, {
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id: c.id,
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name: c.name || c.subject || null,
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unread: c.unreadCount || 0,
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conversationTimestamp: Number(c.conversationTimestamp) || 0,
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});
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}
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for (const c of hcs || []) {
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contacts.set(c.id, { id: c.id, name: c.name || c.notify || c.verifiedName || null });
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}
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for (const m of hm || []) ingestMessage(m, false);
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});
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sock.ev.on('chats.upsert', (cs) => {
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for (const c of cs) chats.set(c.id, {
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id: c.id, name: c.name || c.subject || null,
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unread: c.unreadCount || 0,
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conversationTimestamp: Number(c.conversationTimestamp) || 0,
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});
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});
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sock.ev.on('contacts.upsert', (cs) => {
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for (const c of cs) contacts.set(c.id, { id: c.id, name: c.name || c.notify || c.verifiedName || null });
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});
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sock.ev.on('contacts.update', (cs) => {
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for (const c of cs) {
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const prev = contacts.get(c.id) || { id: c.id };
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contacts.set(c.id, { ...prev, name: c.name || c.notify || prev.name || null });
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}
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});
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sock.ev.on('messages.upsert', ({ messages: ms, type }) => {
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for (const m of ms) ingestMessage(m, type === 'notify');
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});
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} catch (e) {
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log(`startSock error: ${e.message}`);
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state = 'connecting';
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} finally {
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starting = false;
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}
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}
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function ingestMessage(m, live) {
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try {
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const jid = m.key?.remoteJid;
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if (!jid || jid === 'status@broadcast') return;
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const text = textOf(m);
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pushMessage(jid, {
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id: m.key?.id,
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fromMe: !!m.key?.fromMe,
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ts: Number(m.messageTimestamp) || 0,
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text,
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author: m.key?.participant || (m.key?.fromMe ? meJid : jid),
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});
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if (live && !chats.has(jid)) {
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chats.set(jid, { id: jid, name: m.pushName || null, unread: 0, conversationTimestamp: Number(m.messageTimestamp) || 0 });
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} else if (live) {
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const ch = chats.get(jid);
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ch.conversationTimestamp = Number(m.messageTimestamp) || ch.conversationTimestamp;
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if (m.pushName && !ch.name) ch.name = m.pushName;
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}
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} catch (_) {}
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}
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// ── Helpers ────────────────────────────────────────────────────────────────────
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// Turn a plain phone number or a chat id into a WhatsApp jid.
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function toJid(chat_id, number) {
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if (chat_id && chat_id.includes('@')) return chat_id;
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const raw = (chat_id || number || '').replace(/[^0-9]/g, '');
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if (!raw) return null;
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return `${raw}@s.whatsapp.net`;
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}
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function requireReady() {
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if (state !== 'ready') {
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throw new Error(`WhatsApp is not connected (state: ${state}). ` +
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(state === 'need_scan' || state === 'logged_out'
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? 'Open the connector in Skald and scan the QR code to sign in.'
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: 'It is still connecting — try again in a few seconds.'));
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}
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}
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// ── Tools: interactive login (the §15 generic contract) ─────────────────────────
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async function toolLoginStatus() {
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let qrDataUrl = null;
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if (state === 'need_scan' && curQr) {
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try { qrDataUrl = await qrcode.toDataURL(curQr, { width: 320, margin: 2 }); } catch (_) {}
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}
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const message = {
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connecting: 'Connecting to WhatsApp…',
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need_scan: 'Scan this QR code: WhatsApp → Settings → Linked Devices → Link a Device.',
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ready: 'WhatsApp is connected.',
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logged_out: 'This device was unlinked. Scan the new QR code to sign in again.',
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}[state] || state;
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// Returned as a JSON string in a text content part; the login API parses it.
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return JSON.stringify({ state, qr: qrDataUrl, message });
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}
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async function toolStatus() {
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const s = await toolLoginStatus();
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const { state: st, message } = JSON.parse(s);
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const chatCount = chats.size;
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return `WhatsApp status: ${st.toUpperCase()}\n${message}` +
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(st === 'ready' ? `\nKnown chats: ${chatCount}` : '');
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}
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async function toolLogout() {
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try { if (sock) await sock.logout(); } catch (_) {}
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try { fs.rmSync(AUTH_DIR, { recursive: true, force: true }); } catch (_) {}
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chats.clear(); contacts.clear(); messages.clear();
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curQr = null; state = 'connecting'; starting = false; meJid = null;
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setTimeout(() => startSock(), 500);
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return 'Logged out and cleared the session. A new QR code will be generated — open the connector in Skald and scan it.';
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}
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// ── Tools: messaging ────────────────────────────────────────────────────────────
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async function toolListChats(args) {
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requireReady();
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const max = Math.min(Math.max(1, args.max_chats || 20), 50);
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const list = [...chats.values()]
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.sort((a, b) => (b.conversationTimestamp || 0) - (a.conversationTimestamp || 0))
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.slice(0, max);
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if (!list.length) return 'No chats known yet. History may still be syncing — try again in a few seconds.';
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const lines = [`Recent WhatsApp chats (${list.length}):`];
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for (const c of list) {
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const kind = c.id.endsWith('@g.us') ? '[group]' : '[chat]';
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const unread = c.unread ? ` (${c.unread} unread)` : '';
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lines.push(`- ${c.name || contactName(c.id)} ${kind}${unread} | ID: ${c.id}`);
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}
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return lines.join('\n');
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}
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async function toolGetMessages(args) {
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requireReady();
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const jid = toJid(args.chat_id, args.number);
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if (!jid) return 'Error: provide chat_id or number.';
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const limit = Math.min(Math.max(1, args.limit || 20), 100);
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const offset = Math.max(0, args.offset || 0);
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const arr = (messages.get(jid) || []).slice().sort((a, b) => (a.ts || 0) - (b.ts || 0));
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if (!arr.length) return `No messages buffered for ${contactName(jid)} (${jid}). Only messages seen since sign-in are available.`;
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const end = arr.length - offset;
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const slice = arr.slice(Math.max(0, end - limit), Math.max(0, end));
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const lines = [`Messages with ${contactName(jid)} (${jid}):`];
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for (const m of slice) {
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const who = m.fromMe ? 'me' : (jid.endsWith('@g.us') ? contactName(m.author) : contactName(jid));
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const when = m.ts ? new Date(m.ts * 1000).toISOString().replace('T', ' ').slice(0, 16) : '';
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lines.push(`[${when}] ${who}: ${m.text}`);
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}
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return lines.join('\n');
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}
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async function toolSendMessage(args) {
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requireReady();
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const jid = toJid(args.chat_id, args.number);
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if (!jid) return 'Error: provide chat_id or number.';
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if (!args.message) return 'Error: message is required.';
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await sock.sendMessage(jid, { text: String(args.message) });
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return `Message sent to ${contactName(jid)} (${jid}).`;
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}
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async function toolSearchContacts(args) {
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requireReady();
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const q = String(args.query || '').toLowerCase();
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if (!q) return 'Error: query is required.';
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const max = Math.min(Math.max(1, args.max_results || 20), 50);
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const seen = new Set();
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const out = [];
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for (const c of contacts.values()) {
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if (out.length >= max) break;
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const name = c.name || '';
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if (name.toLowerCase().includes(q) || c.id.includes(q)) {
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if (seen.has(c.id)) continue;
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seen.add(c.id);
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out.push(`- ${name || contactName(c.id)} | ID: ${c.id}`);
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}
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}
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if (!out.length) return `No contacts found matching "${args.query}".`;
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return [`Contacts matching "${args.query}" (${out.length}):`, ...out].join('\n');
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}
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// ── MCP tool definitions ────────────────────────────────────────────────────────
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const TOOLS = [
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{
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name: 'login_status',
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description: 'Interactive-login status for this connector (used by the Skald login panel). Returns a JSON object {state, qr, message}: state is connecting|need_scan|ready|logged_out; qr is a data-URL PNG present only while a scan is needed. Safe to poll.',
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inputSchema: { type: 'object', properties: {} },
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},
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{
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name: 'status',
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description: 'WhatsApp connection status as a short human-readable report. Call this first when another WhatsApp tool fails.',
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inputSchema: { type: 'object', properties: {} },
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},
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{
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name: 'logout',
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description: 'Log out of WhatsApp: end the session, clear the stored credentials, and generate a fresh QR code to link a (possibly different) phone. After calling, the user must scan the new QR in the Skald connector page.',
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inputSchema: { type: 'object', properties: {} },
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},
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{
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name: 'list_chats',
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description: 'List recent WhatsApp chats (contacts and groups) with name, ID and unread count. Only chats seen since sign-in / history sync are known.',
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inputSchema: {
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type: 'object',
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properties: { max_chats: { type: 'integer', description: 'Max chats to return (default 20, max 50).' } },
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},
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},
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{
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name: 'get_messages',
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description: 'Get buffered messages from a chat. Identify it with EITHER chat_id (from list_chats) OR a phone number with country code for an individual contact. Only messages seen since sign-in are available (no deep history).',
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inputSchema: {
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type: 'object',
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properties: {
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chat_id: { type: 'string', description: 'Chat ID, e.g. "39XXXXXXXXXX@s.whatsapp.net" or "…@g.us".' },
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number: { type: 'string', description: 'Alternative to chat_id: phone number with country code (e.g. "393331234567"). Ignored if chat_id is given.' },
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limit: { type: 'integer', description: 'Number of messages (default 20, max 100).' },
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offset: { type: 'integer', description: 'Skip this many of the most recent messages (default 0).' },
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},
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},
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},
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{
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name: 'send_message',
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description: 'Send a WhatsApp text message. Identify the recipient with EITHER chat_id (from list_chats, use for groups) OR a phone number with country code for an individual contact.',
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inputSchema: {
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type: 'object',
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properties: {
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chat_id: { type: 'string', description: 'Chat ID to send to (use for groups).' },
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number: { type: 'string', description: 'Alternative to chat_id: phone number with country code. Ignored if chat_id is given.' },
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message: { type: 'string', description: 'The text to send.' },
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},
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required: ['message'],
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},
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},
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{
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name: 'search_contacts',
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description: 'Search known WhatsApp contacts by name or number. Use to find a contact ID to message.',
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inputSchema: {
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type: 'object',
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properties: {
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query: { type: 'string', description: 'Name or partial name/number (case-insensitive).' },
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max_results: { type: 'integer', description: 'Max contacts to return (default 20, max 50).' },
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},
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required: ['query'],
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},
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},
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];
|
||
|
||
// ── JSON-RPC framing ─────────────────────────────────────────────────────────
|
||
|
||
function okResponse(id, result) { return JSON.stringify({ jsonrpc: '2.0', id, result }); }
|
||
function textResult(id, text, isError = false) {
|
||
const result = { content: [{ type: 'text', text }] };
|
||
if (isError) result.isError = true;
|
||
return JSON.stringify({ jsonrpc: '2.0', id, result });
|
||
}
|
||
|
||
async function handleRequest(msg) {
|
||
const { method, id, params } = msg;
|
||
|
||
if (method === 'initialize') {
|
||
return okResponse(id, {
|
||
protocolVersion: '2024-11-05',
|
||
capabilities: { tools: {} },
|
||
serverInfo: { name: 'whatsapp', version: '2.0.0' },
|
||
});
|
||
}
|
||
if (method === 'notifications/initialized') return null;
|
||
if (method === 'tools/list') return okResponse(id, { tools: TOOLS });
|
||
|
||
if (method === 'tools/call') {
|
||
const toolName = params?.name || '';
|
||
const toolArgs = params?.arguments || {};
|
||
let text;
|
||
try {
|
||
switch (toolName) {
|
||
case 'login_status': text = await toolLoginStatus(); break;
|
||
case 'status': text = await toolStatus(); break;
|
||
case 'logout': text = await toolLogout(); break;
|
||
case 'list_chats': text = await toolListChats(toolArgs); break;
|
||
case 'get_messages': text = await toolGetMessages(toolArgs); break;
|
||
case 'send_message': text = await toolSendMessage(toolArgs); break;
|
||
case 'search_contacts': text = await toolSearchContacts(toolArgs); break;
|
||
default:
|
||
return textResult(id, `Unknown tool: ${toolName}`, true);
|
||
}
|
||
} catch (e) {
|
||
log(`tool '${toolName}' error: ${e.message}`);
|
||
return textResult(id, `Error: ${e.message}`, true);
|
||
}
|
||
const isErr = typeof text === 'string' && text.startsWith('Error:');
|
||
return textResult(id, text, isErr);
|
||
}
|
||
|
||
return JSON.stringify({ jsonrpc: '2.0', id, error: { code: -32601, message: `Method not found: ${method}` } });
|
||
}
|
||
|
||
// ── Main ─────────────────────────────────────────────────────────────────────
|
||
|
||
async function main() {
|
||
log('Starting WhatsApp MCP server (Baileys)');
|
||
fs.mkdirSync(MEDIA_DIR, { recursive: true });
|
||
startSock().catch((e) => log(`initial startSock failed: ${e.message}`));
|
||
|
||
const rl = readline.createInterface({ input: process.stdin, crlfDelay: Infinity });
|
||
rl.on('line', async (line) => {
|
||
line = line.trim();
|
||
if (!line) return;
|
||
let msg;
|
||
try { msg = JSON.parse(line); } catch (e) { log(`bad JSON on stdin: ${e.message}`); return; }
|
||
const resp = await handleRequest(msg);
|
||
if (resp !== null) process.stdout.write(resp + '\n');
|
||
});
|
||
rl.on('close', () => { log('stdin closed, shutting down'); process.exit(0); });
|
||
|
||
process.on('SIGTERM', () => { log('SIGTERM'); process.exit(0); });
|
||
process.on('SIGINT', () => { log('SIGINT'); process.exit(0); });
|
||
}
|
||
|
||
main().catch((e) => { log(`Fatal: ${e.message}`); process.exit(1); });
|