Initial commit: noticeboard

backend/src/auth.js

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+import { jwtVerify } from 'jose'
+import dns from 'dns/promises'
+
+const APP_SLUG = process.env.APP_SLUG || 'noticeboard'
+const secret = new TextEncoder().encode(process.env.CENTRAL_AUTH_SECRET || '')
+
+// Offsite IP check — supports static IP, CIDR, DDNS hostname, or 'disabled'
+const OFFICE_IP_CHECK = process.env.OFFICE_IP_CHECK || 'disabled'
+
+let cachedOfficeIP = null
+let cacheExpiry = 0
+
+function ipInCidr(ip, cidr) {
+  const [range, bits] = cidr.split('/')
+  const mask = ~(2 ** (32 - parseInt(bits)) - 1) >>> 0
+  const ipInt = ip.split('.').reduce((acc, oct) => (acc << 8) + parseInt(oct), 0) >>> 0
+  const rangeInt = range.split('.').reduce((acc, oct) => (acc << 8) + parseInt(oct), 0) >>> 0
+  return (ipInt & mask) === (rangeInt & mask)
+}
+
+async function resolveOfficeIP() {
+  if (OFFICE_IP_CHECK === 'disabled') return null
+  if (Date.now() < cacheExpiry && cachedOfficeIP) return cachedOfficeIP
+
+  const isHostname = /[a-zA-Z]/.test(OFFICE_IP_CHECK) && !OFFICE_IP_CHECK.includes('/')
+
+  if (isHostname) {
+    try {
+      const addrs = await dns.resolve4(OFFICE_IP_CHECK)
+      cachedOfficeIP = addrs[0]
+      cacheExpiry = Date.now() + 5 * 60 * 1000
+    } catch {
+      // DNS failed — keep last known IP if we have one, don't lock everyone out
+    }
+  } else {
+    cachedOfficeIP = OFFICE_IP_CHECK
+    cacheExpiry = Infinity
+  }
+
+  return cachedOfficeIP
+}
+
+export async function requireAuth(request, reply) {
+  const token = request.cookies?.hnf_session
+  if (!token) return reply.status(401).send({ error: 'Not authenticated' })
+
+  let payload
+  try {
+    const { payload: p } = await jwtVerify(token, secret)
+    payload = p
+  } catch {
+    return reply.status(401).send({ error: 'Invalid session' })
+  }
+
+  if (!payload.apps?.includes(APP_SLUG)) {
+    return reply.status(403).send({ error: 'No permission for this app' })
+  }
+
+  // Offsite check — only for users without offsite_allowed flag
+  if (!payload.offsite_allowed) {
+    const officeIP = await resolveOfficeIP()
+    if (officeIP) {
+      const clientIP = request.headers['x-real-ip'] || request.ip
+      const onsite = officeIP.includes('/')
+        ? ipInCidr(clientIP, officeIP)
+        : clientIP === officeIP
+
+      if (!onsite) {
+        return reply.status(403).send({ error: 'Access restricted to site network' })
+      }
+    }
+  }
+
+  request.user = {
+    email: payload.sub,
+    name: payload.name,
+    is_admin: payload.is_admin ?? false,
+  }
+}

backend/src/db.js

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+import pg from 'pg'
+
+const { Pool } = pg
+
+export const pool = new Pool({
+  connectionString: process.env.DATABASE_URL,
+})
+
+export async function initDb() {
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS notices (
+      id          SERIAL PRIMARY KEY,
+      title       TEXT NOT NULL,
+      body        TEXT NOT NULL,
+      category    TEXT NOT NULL DEFAULT 'general',
+      author_name TEXT NOT NULL,
+      author_email TEXT NOT NULL,
+      pinned      BOOLEAN NOT NULL DEFAULT FALSE,
+      expires_at  TIMESTAMPTZ,
+      created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    )
+  `)
+}

backend/src/index.js

@@ -0,0 +1,25 @@
+import Fastify from 'fastify'
+import cookie from '@fastify/cookie'
+import cors from '@fastify/cors'
+import { initDb } from './db.js'
+import { noticeRoutes } from './routes/notices.js'
+
+const app = Fastify({ logger: true, trustProxy: true })
+
+await app.register(cookie)
+await app.register(cors, {
+  origin: process.env.CORS_ORIGIN || false,
+  credentials: true,
+})
+
+app.get('/health', async () => ({ status: 'healthy' }))
+
+await app.register(noticeRoutes)
+
+try {
+  await initDb()
+  await app.listen({ port: 3001, host: '0.0.0.0' })
+} catch (err) {
+  app.log.error(err)
+  process.exit(1)
+}

backend/src/routes/notices.js

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+import { pool } from '../db.js'
+import { requireAuth } from '../auth.js'
+
+export async function noticeRoutes(app) {
+  app.addHook('preHandler', requireAuth)
+
+  app.get('/api/notices', async (request) => {
+    const { category } = request.query
+    const now = new Date().toISOString()
+
+    const result = await pool.query(
+      `SELECT * FROM notices
+       WHERE (expires_at IS NULL OR expires_at > $1)
+       ${category && category !== 'all' ? 'AND category = $2' : ''}
+       ORDER BY pinned DESC, created_at DESC`,
+      category && category !== 'all' ? [now, category] : [now]
+    )
+    return result.rows
+  })
+
+  app.post('/api/notices', async (request, reply) => {
+    if (!request.user.is_admin) return reply.status(403).send({ error: 'Admins only' })
+
+    const { title, body, category = 'general', pinned = false, expires_at = null } = request.body
+
+    if (!title?.trim() || !body?.trim()) {
+      return reply.status(400).send({ error: 'Title and body are required' })
+    }
+
+    const result = await pool.query(
+      `INSERT INTO notices (title, body, category, author_name, author_email, pinned, expires_at)
+       VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING *`,
+      [title.trim(), body.trim(), category, request.user.name, request.user.email, pinned, expires_at || null]
+    )
+    return reply.status(201).send(result.rows[0])
+  })
+
+  app.patch('/api/notices/:id/pin', async (request, reply) => {
+    if (!request.user.is_admin) return reply.status(403).send({ error: 'Admins only' })
+
+    const result = await pool.query(
+      `UPDATE notices SET pinned = NOT pinned WHERE id = $1 RETURNING *`,
+      [request.params.id]
+    )
+    if (!result.rows.length) return reply.status(404).send({ error: 'Not found' })
+    return result.rows[0]
+  })
+
+  app.delete('/api/notices/:id', async (request, reply) => {
+    if (!request.user.is_admin) return reply.status(403).send({ error: 'Admins only' })
+
+    const result = await pool.query(
+      `DELETE FROM notices WHERE id = $1 RETURNING id`,
+      [request.params.id]
+    )
+    if (!result.rows.length) return reply.status(404).send({ error: 'Not found' })
+    return reply.status(204).send()
+  })
+}