ProdDash/tools/slack-mock.js

/**
 * Mock Slack Web API for developing the slack module without a workspace.
 *
 *   node tools/slack-mock.js [port]                       (default 24716)
 *   SLACK_API_BASE=http://127.0.0.1:24716/api node server.js
 *
 * Then, in /admin → Slack, paste any token that starts with xoxp- (a user
 * token: auth.test answers as the location account "Apollo Beach") or xoxb-
 * (a bot token: bot_id set, user "proddash"); anything else is invalid_auth.
 * Two more tokens exercise the error paths: xoxp-revoked → token_revoked,
 * xoxp-noscope → missing_scope (needed channels:history) on history reads.
 *
 * Methods, all under /api/<method>, POST form or JSON (GET works too):
 *   auth.test               identity for the token (see above)
 *   conversations.list      #production, #ops, #campus-leads (private) as
 *                           member; #announcements not a member; paginated
 *   conversations.info      one channel, with is_member
 *   conversations.history   newest-first window (limit); not_in_channel for
 *                           #announcements
 *   conversations.replies   a thread's parent + replies
 *   users.info              display names for the seeded users
 *   chat.postMessage        appends to the channel (echoes `username` for
 *                           bots as a bot_message); text containing "!429"
 *                           answers HTTP 429 with Retry-After: 3
 *
 * #production is seeded with mrkdwn, mentions, a link, a thread, a bot
 * attachment and a file; it gains a new fake message every ~8 s, edits one
 * every ~25 s, deletes one every ~40 s and adds a thread reply every ~30 s.
 * Every request is logged.
 */
'use strict';

const http = require('http');

const PORT = Number.parseInt(process.argv[2] || '24716', 10);

/* ── data ───────────────────────────────────────────────────────────── */

const USERS = {
  U001: { name: 'apollo.beach', real_name: 'Apollo Beach', display_name: 'Apollo Beach' },
  U002: { name: 'michael', real_name: 'Michael McGary', display_name: 'Michael' },
  U003: { name: 'sarah.lee', real_name: 'Sarah Lee', display_name: 'Sarah' },
  U004: { name: 'north.attleboro', real_name: 'North Attleboro', display_name: 'North Attleboro' },
  U005: { name: 'dan.k', real_name: 'Dan Kowalski', display_name: 'Dan K' },
  UBOT: { name: 'proddash', real_name: 'ProdDash', display_name: '', is_bot: true },
};

const CHANNELS = [
  { id: 'C001', name: 'production', is_private: false, is_member: true },
  { id: 'C002', name: 'ops', is_private: false, is_member: true },
  { id: 'G001', name: 'campus-leads', is_private: true, is_member: true },
  { id: 'C003', name: 'announcements', is_private: false, is_member: false },
];

let tsCounter = 0;
function ts(offsetMs = 0) {
  tsCounter += 1;
  return `${Math.floor((Date.now() + offsetMs) / 1000)}.${String(tsCounter).padStart(6, '0')}`;
}

/** channel id -> messages (ascending); replies live inside their parent. */
const history = new Map();
for (const c of CHANNELS) history.set(c.id, []);

function push(channelId, msg) {
  const list = history.get(channelId);
  const m = { type: 'message', ts: msg.ts || ts(), ...msg };
  list.push(m);
  if (list.length > 400) list.splice(0, list.length - 400);
  return m;
}

function seed() {
  const min = 60000;
  const at = (minsAgo) => ts(-minsAgo * min);
  push('C001', { ts: at(58), user: 'U003', subtype: 'channel_join', text: '<@U003> has joined the channel' });
  push('C001', { ts: at(55), user: 'U002', text: 'Morning all — doors at 9:15, first service 10:00. Run of show is in <#C002|ops>.' });
  push('C001', { ts: at(50), user: 'U001', text: 'Apollo Beach is up. Stream key checked, ProPresenter online :white_check_mark:' });
  push('C001', { ts: at(47), user: 'U004', text: 'North Attleboro here — we have *no audio* on the sermon feed yet, working on it' });
  push('C001', { ts: at(44), user: 'U002', text: '<@U004> try the Dante patch — `Sermon Feed L/R` should be on 31/32. _Ping me if not._' });
  const parent = push('C001', { ts: at(40), user: 'U003', text: 'Countdown video is the new one this week, right? ~old one~ &lt;-- not this', reply_count: 2, latest_reply: '' });
  parent.replies = [
    { type: 'message', ts: at(39), user: 'U002', text: 'Yes — "Countdown 5 min (Sept)" in the media bin', thread_ts: parent.ts },
    { type: 'message', ts: at(38), user: 'U003', text: 'Got it :+1:', thread_ts: parent.ts },
  ];
  parent.latest_reply = parent.replies[1].ts;
  push('C001', {
    ts: at(35), subtype: 'bot_message', bot_id: 'B002', username: 'Planning Center', text: '',
    attachments: [{ fallback: 'Plan updated: Sunday Service — Sept 14 (2 items changed)', title: 'Plan updated', text: 'Sunday Service — Sept 14 (2 items changed)' }],
  });
  push('C001', { ts: at(30), user: 'U005', text: 'Lower thirds for the announcements: <https://waterschurch.org/plan|this week’s plan>', files: [{ id: 'F001', name: 'lower-thirds-0914.png', title: 'lower-thirds-0914.png' }] });
  push('C001', { ts: at(25), user: 'U004', text: 'Audio fixed — Dante patch was it. Thanks <@U002> :pray:', edited: { user: 'U004', ts: at(24) } });
  push('C001', { ts: at(20), user: 'U002', text: '<!here> 10 minutes to doors. Campuses, post "ready" when your pre-service loop is running.' });
  push('C001', { ts: at(15), user: 'U001', text: 'Apollo Beach ready' });
  push('C001', { ts: at(14), user: 'U004', text: 'North Attleboro ready' });

  push('C002', { ts: at(120), user: 'U002', text: 'Run of show for Sept 14 is pinned. Changes go here, not in DMs.' });
  push('C002', { ts: at(90), user: 'U005', text: 'Bumper video is 0:42 this week, not 0:30 — adjust your timers.' });
  push('G001', { ts: at(200), user: 'U002', text: 'Leads: budget call moved to Tuesday 2pm.' });
  push('C003', { ts: at(300), user: 'U002', text: 'Staff meeting notes are in the drive.' });
}
seed();

const CHATTER = [
  { user: 'U003', text: 'Walk-in music is a touch loud at the back, can we come down 2 dB?' },
  { user: 'U002', text: 'Cue 4 is the *baptism video* — heads up, it has its own audio' },
  { user: 'U005', text: 'Livestream is live, 38 viewers already :tada:' },
  { user: 'U004', text: 'North Attleboro: pastor is running about 3 min long today' },
  { user: 'U002', text: 'Copy. Apollo Beach, hold your bumper until you hear from us' },
  { user: 'U003', text: 'Lyrics slide 3 of "Living Hope" has a typo — fixing for second service' },
  { user: 'U005', text: 'Stream bitrate dipped for a sec, back to normal now' },
  { user: 'U002', text: 'Offering moment is *after* the sermon this week, not before' },
  { user: 'U004', text: 'Anyone else seeing the ProPresenter stage display lag?' },
  { user: 'U003', text: 'Kids check-in is slammed, could use one more volunteer at the desk' },
  { user: 'U002', text: 'Great first service everyone :clap: reset in 15' },
];
let chatterIx = 0;

function tickNew() {
  const line = CHATTER[chatterIx % CHATTER.length];
  chatterIx += 1;
  const m = push('C001', { user: line.user, text: line.text });
  console.log(`[slack-mock] + new message ${m.ts} from ${line.user}`);
}

function tickEdit() {
  const list = history.get('C001');
  const recent = list.slice(-8).filter((m) => m.user && !m.subtype && !m.edited);
  if (!recent.length) return;
  const m = recent[Math.floor(Math.random() * recent.length)];
  m.text += ' — fixed';
  m.edited = { user: m.user, ts: ts() };
  console.log(`[slack-mock] ~ edited ${m.ts}`);
}

function tickDelete() {
  const list = history.get('C001');
  const candidates = list.slice(-10, -2).filter((m) => m.user && !m.subtype && !m.reply_count);
  if (!candidates.length) return;
  const victim = candidates[Math.floor(Math.random() * candidates.length)];
  list.splice(list.indexOf(victim), 1);
  console.log(`[slack-mock] - deleted ${victim.ts}`);
}

function tickReply() {
  const list = history.get('C001');
  const parent = list.find((m) => m.reply_count);
  if (!parent) return;
  const reply = { type: 'message', ts: ts(), user: ['U002', 'U003', 'U005'][parent.replies.length % 3], text: `Thread reply ${parent.replies.length + 1} :eyes:`, thread_ts: parent.ts };
  parent.replies.push(reply);
  parent.reply_count = parent.replies.length;
  parent.latest_reply = reply.ts;
  console.log(`[slack-mock] ↳ reply on ${parent.ts} (${parent.reply_count} total)`);
}

setInterval(tickNew, 8000).unref();
setInterval(tickEdit, 25000).unref();
setInterval(tickDelete, 40000).unref();
setInterval(tickReply, 30000).unref();

/* ── plumbing ───────────────────────────────────────────────────────── */

function send(res, status, body, headers = {}) {
  res.writeHead(status, { 'Content-Type': 'application/json; charset=utf-8', 'Cache-Control': 'no-store', ...headers });
  res.end(JSON.stringify(body));
}

function readBody(req) {
  return new Promise((resolve) => {
    let data = '';
    req.on('data', (c) => { data += c; });
    req.on('end', () => resolve(data));
    req.on('error', () => resolve(''));
  });
}

function parseParams(req, url, raw) {
  const params = Object.fromEntries(url.searchParams.entries());
  const ctype = String(req.headers['content-type'] || '');
  if (raw) {
    if (ctype.includes('application/json')) {
      try { Object.assign(params, JSON.parse(raw)); } catch { /* ignore */ }
    } else {
      for (const [k, v] of new URLSearchParams(raw)) params[k] = v;
    }
  }
  return params;
}

function tokenOf(req, params) {
  const m = /^Bearer\s+(\S+)/.exec(String(req.headers.authorization || ''));
  return m ? m[1] : String(params.token || '');
}

function identity(token) {
  if (token === 'xoxp-revoked') return { error: 'token_revoked' };
  if (/^xoxp-/.test(token)) return { ok: true, url: 'https://waters.slack.com/', team: 'Waters Church', user: 'apollo.beach', team_id: 'T001', user_id: 'U001', noscope: token === 'xoxp-noscope' };
  if (/^xoxb-/.test(token)) return { ok: true, url: 'https://waters.slack.com/', team: 'Waters Church', user: 'proddash', team_id: 'T001', user_id: 'UBOT', bot_id: 'B001' };
  return { error: 'invalid_auth' };
}

function channelRecord(c) {
  return { id: c.id, name: c.name, name_normalized: c.name, is_channel: !c.is_private, is_group: c.is_private, is_private: c.is_private, is_member: c.is_member, is_archived: false, num_members: 12 };
}

function publicMessage(m) {
  const { replies, ...rest } = m;
  return rest;
}

function findChannel(ref) {
  const s = String(ref || '');
  return CHANNELS.find((c) => c.id === s || c.name === s.replace(/^#/, ''));
}

const server = http.createServer(async (req, res) => {
  const url = new URL(req.url, `http://127.0.0.1:${PORT}`);
  const raw = req.method === 'POST' ? await readBody(req) : '';
  const params = parseParams(req, url, raw);
  const method = url.pathname.replace(/^\/api\//, '');
  const summary = Object.entries(params).filter(([k]) => k !== 'token').map(([k, v]) => `${k}=${String(v).slice(0, 40)}`).join(' ');
  console.log(`[slack-mock] ${req.method} ${url.pathname} ${summary}`);

  if (!url.pathname.startsWith('/api/')) return send(res, 404, { ok: false, error: 'unknown_method' });

  const token = tokenOf(req, params);
  const who = identity(token);
  if (!who.ok) return send(res, 200, { ok: false, error: who.error });

  switch (method) {
    case 'auth.test': {
      const { noscope, ...rest } = who;
      return send(res, 200, rest);
    }

    case 'users.info': {
      const u = USERS[String(params.user)];
      if (!u) return send(res, 200, { ok: false, error: 'user_not_found' });
      return send(res, 200, { ok: true, user: { id: params.user, name: u.name, real_name: u.real_name, is_bot: Boolean(u.is_bot), profile: { display_name: u.display_name, real_name: u.real_name } } });
    }

    case 'conversations.list': {
      const types = String(params.types || 'public_channel').split(',');
      let list = CHANNELS.filter((c) => (c.is_private ? types.includes('private_channel') : types.includes('public_channel')));
      if (who.bot_id) list = list.filter((c) => c.is_member); // a bot sees only what it's in
      const limit = Math.max(1, Math.min(1000, Number(params.limit) || 100));
      const start = params.cursor ? Number(Buffer.from(String(params.cursor), 'base64').toString()) || 0 : 0;
      const page = list.slice(start, start + limit);
      const next = start + limit < list.length ? Buffer.from(String(start + limit)).toString('base64') : '';
      return send(res, 200, { ok: true, channels: page.map(channelRecord), response_metadata: { next_cursor: next } });
    }

    case 'conversations.info': {
      const c = findChannel(params.channel);
      if (!c) return send(res, 200, { ok: false, error: 'channel_not_found' });
      return send(res, 200, { ok: true, channel: channelRecord(c) });
    }

    case 'conversations.history': {
      const c = findChannel(params.channel);
      if (!c) return send(res, 200, { ok: false, error: 'channel_not_found' });
      if (who.noscope) return send(res, 200, { ok: false, error: 'missing_scope', needed: 'channels:history', provided: 'channels:read,chat:write' });
      if (!c.is_member) return send(res, 200, { ok: false, error: 'not_in_channel' });
      const limit = Math.max(1, Math.min(1000, Number(params.limit) || 100));
      const list = history.get(c.id);
      const window = list.slice(-limit).reverse().map(publicMessage);
      return send(res, 200, { ok: true, messages: window, has_more: list.length > limit, pin_count: 0 });
    }

    case 'conversations.replies': {
      const c = findChannel(params.channel);
      if (!c) return send(res, 200, { ok: false, error: 'channel_not_found' });
      if (!c.is_member) return send(res, 200, { ok: false, error: 'not_in_channel' });
      const parent = history.get(c.id).find((m) => m.ts === String(params.ts));
      if (!parent) return send(res, 200, { ok: false, error: 'thread_not_found' });
      const limit = Math.max(1, Math.min(1000, Number(params.limit) || 100));
      return send(res, 200, { ok: true, messages: [publicMessage(parent), ...(parent.replies || []).slice(0, limit - 1)], has_more: false });
    }

    case 'chat.postMessage': {
      const c = findChannel(params.channel);
      if (!c) return send(res, 200, { ok: false, error: 'channel_not_found' });
      if (!c.is_member) return send(res, 200, { ok: false, error: 'not_in_channel' });
      const text = String(params.text || '');
      if (!text.trim()) return send(res, 200, { ok: false, error: 'no_text' });
      if (text.includes('!429')) return send(res, 429, { ok: false, error: 'ratelimited' }, { 'Retry-After': '3' });
      let m;
      if (who.bot_id && params.username) {
        m = push(c.id, { subtype: 'bot_message', bot_id: who.bot_id, username: String(params.username), icons: params.icon_emoji ? { emoji: String(params.icon_emoji) } : undefined, text });
      } else if (who.bot_id) {
        m = push(c.id, { user: who.user_id, bot_id: who.bot_id, bot_profile: { id: who.bot_id, name: 'ProdDash' }, text });
      } else {
        m = push(c.id, { user: who.user_id, text });
      }
      if (params.thread_ts) m.thread_ts = String(params.thread_ts);
      console.log(`[slack-mock] ✉ posted to #${c.name} as ${params.username || who.user}: ${text.slice(0, 60)}`);
      return send(res, 200, { ok: true, channel: c.id, ts: m.ts, message: publicMessage(m) });
    }

    default:
      return send(res, 200, { ok: false, error: 'unknown_method' });
  }
});

server.listen(PORT, '127.0.0.1', () => {
  console.log(`[slack-mock] Slack Web API mock on http://127.0.0.1:${PORT}/api`);
  console.log('[slack-mock] tokens: xoxp-anything (user "Apollo Beach"), xoxb-anything (bot), xoxp-revoked, xoxp-noscope');
  console.log('[slack-mock] run ProdDash with: SLACK_API_BASE=http://127.0.0.1:%d/api node server.js', PORT);
});