Postgres

1// server/routes/bootstrap.ts
2import express, { Router, Request, Response } from 'express'
3import { Pool } from 'pg'
4 
5const router: Router = express.Router()
6const pool = new Pool({ connectionString: process.env.DATABASE_URL })
7 
8router.get('/public', async (req: Request, res: Response) => {
9  try {
10    const { rows: services } = await pool.query(
11      'SELECT * FROM services ORDER BY sort_order ASC'
12    )
13    const { rows: team } = await pool.query(
14      'SELECT * FROM team_members ORDER BY name ASC'
15    )
16 
17    res.json({
18      ok: true,
19      data: { services, team },
20      assets: [],
21    })
22  } catch (err: any) {
23    res.status(500).json({ ok: false, error: err.message })
24  }
25})
26 
27export default router

1// Flux's contract is one network call, NOT one query. Nothing stops
2// this route from running several queries — one per registered
3// channel — as long as they're all bundled into the single JSON
4// response. This is the correct shape, not an N+1 problem:
5 
6const [services, team, pricing] = await Promise.all([
7  pool.query('SELECT * FROM services ORDER BY sort_order ASC'),
8  pool.query('SELECT * FROM team_members ORDER BY name ASC'),
9  pool.query('SELECT * FROM pricing_tiers ORDER BY price ASC'),
10])
11 
12res.json({
13  ok: true,
14  data: {
15    services: services.rows,
16    team: team.rows,
17    pricing: pricing.rows,
18  },
19  assets: [],
20})
21 
22// Promise.all keeps these concurrent rather than sequential — the
23// client still only ever sees ONE request in the Network tab.

1// server/routes/bootstrap.js (excerpt) — a 'user'-scope endpoint
2router.get('/user', requireAuth, async (req, res) => {
3  const userId = req.user.id // set by your own auth middleware
4 
5  try {
6    const { rows: dashboard } = await pool.query(
7      'SELECT * FROM dashboard_widgets WHERE user_id = $1',
8      [userId]
9    )
10    const { rows: billing } = await pool.query(
11      'SELECT * FROM billing_summary WHERE user_id = $1',
12      [userId]
13    )
14 
15    res.json({
16      ok: true,
17      data: { dashboard, billing },
18      assets: [],
19    })
20  } catch (err) {
21    res.status(500).json({ ok: false, error: err.message })
22  }
23})
24 
25// The client-side call this endpoint answers:
26//
27//   flux.bootstrap({
28//     endpoint: '/api/bootstrap/user',
29//     scope: 'user',
30//     userId: currentUser.id,
31//     map: { dashboard: dashboardAdapter, billing: billingAdapter },
32//   })
33//
34// Always parameterize by req.user.id from YOUR OWN auth middleware —
35// never trust a userId passed in the request body or query string.
36// Flux's userId field on BootstrapConfig is for client-side IDB
37// namespacing only; it carries no authority server-side.

1-- Server-side contract for SyncAnchorMap (Section 4.1):
2-- For each channel, query the single-state flux_changelog table
3-- instead of querying the live table directly. This ensures that
4-- offline deletions and merged sparse field updates are returned accurately.
5 
6SELECT row_id, op, row_data, changed_at
7FROM flux_changelog
8WHERE table_name = $1 AND changed_at > to_timestamp($2 / 1000.0)
9ORDER BY changed_at ASC
10LIMIT 2000;
11 
12-- $1 is the table name associated with the channel.
13-- $2 is the per-channel anchor value (unix ms) sent during reconnect or sync.
14-- Single-state dedup guarantees at most one row per entity in the result set.

1// server/routes/items-revalidate.js — backing a handshake QueueConfig
2// This is the Pass 1 bulk probe endpoint revalidateFn calls, NOT the
3// bootstrap endpoint. Section 4.6: called ONCE per endpoint group
4// with ALL queued entries' ids + clock-skew-corrected timestamps.
5router.post('/items/revalidate', async (req, res) => {
6  const { manifest } = req.body // [{ id, timestamp }, ...]
7  const ids = manifest.map((m) => m.id)
8 
9  const { rows } = await pool.query(
10    'SELECT id, updated_at FROM items WHERE id = ANY($1)',
11    [ids]
12  )
13 
14  const conflictedIds = []
15  const serverStates = {}
16 
17  for (const entry of manifest) {
18    const serverRow = rows.find((r) => r.id === entry.id)
19    if (serverRow && serverRow.updated_at.getTime() > entry.timestamp) {
20      conflictedIds.push(entry.id)
21      serverStates[entry.id] = serverRow
22    }
23  }
24 
25  res.json({ conflictedIds, serverStates })
26})
27 
28// The matching client-side queueConfig:
29//
30//   queueConfig: {
31//     storeName: 'items_mutation_queue',
32//     replayEndpoint: '/api/items',
33//     replayStrategy: 'handshake',
34//     revalidateFn: async (entries, manifest) => {
35//       const res = await fetch('/api/items/revalidate', {
36//         method: 'POST',
37//         body: JSON.stringify({ manifest }),
38//       })
39//       return res.json()
40//     },
41//   }

1// Don't do this — sequential queries with no bundling defeats the
2// entire point of a single-packet bootstrap:
3 
4app.get('/api/services', ...)     // ❌ separate endpoint
5app.get('/api/team', ...)         // ❌ separate endpoint
6app.get('/api/pricing', ...)      // ❌ separate endpoint
7// three client-side fetch() calls on mount — exactly what Flux's
8// bootstrap module exists to replace with one.
9 
10// Also avoid: forgetting the WHERE user_id = $1 clause on a 'user'
11// scope endpoint. Flux's client-side scoping (Section 4.17) isolates
12// the CACHE per tenant — it has no way to stop your own endpoint
13// from leaking another user's row if the query itself doesn't filter
14// by the authenticated request's user id.