Moheeb Zara
75097a601c
POST /api/cron/notifications drains <=20 pending rows/min, sends via the transport with the row id as Resend Idempotency-Key (overlap-safe), marks sent or increments attempts (retryable -> stay pending, permanent or budget-exhausted -> failed). Constant-time CRON_SECRET bearer check; 503 when unset. ~4.5/s spacing under Resend's 5/s limit. proxy.ts whitelists /api/cron (no session; own shared secret). CRON_SECRET added to .env.example.
95 lines
3.3 KiB
TypeScript
95 lines
3.3 KiB
TypeScript
// Notification dispatcher. Drains a bounded batch of pending outbox rows and
|
|
// sends them via the email transport. Designed to be hit once a minute by the
|
|
// droplet's crontab (see docs/DEPLOYMENT.md). Unauthenticated by session
|
|
// (cron has none) so proxy.ts whitelists /api/cron; trust is the CRON_SECRET
|
|
// shared-secret header, compared in constant time.
|
|
//
|
|
// Re-entrancy: a row is updated immediately after its own send, and sendEmail
|
|
// passes the row id as Resend's Idempotency-Key, so an overlapping run cannot
|
|
// double-send. Transient failures (retryable) stay pending for the next
|
|
// minute until the attempt budget is exhausted; permanent ones go to 'failed'.
|
|
import { NextRequest, NextResponse } from 'next/server'
|
|
import { timingSafeEqual } from 'node:crypto'
|
|
import { createAdminClient } from '@/lib/supabase/admin'
|
|
import { sendEmail } from '@/lib/email/send'
|
|
import { isTerminalAttempt, MAX_NOTIFICATION_ATTEMPTS } from '@/lib/notifications-logic'
|
|
|
|
export const runtime = 'nodejs'
|
|
export const dynamic = 'force-dynamic'
|
|
|
|
const BATCH = 20
|
|
// ~4.5 sends/sec, under Resend's 5 req/sec team limit.
|
|
const SPACING_MS = 220
|
|
|
|
const sleep = (ms: number) => new Promise(r => setTimeout(r, ms))
|
|
|
|
function authorized(req: NextRequest): boolean {
|
|
const expected = process.env.CRON_SECRET
|
|
if (!expected) return false
|
|
const header = req.headers.get('authorization') ?? ''
|
|
const provided = header.startsWith('Bearer ') ? header.slice(7) : header
|
|
const a = Buffer.from(provided)
|
|
const b = Buffer.from(expected)
|
|
return a.length === b.length && timingSafeEqual(a, b)
|
|
}
|
|
|
|
export async function POST(req: NextRequest) {
|
|
if (!process.env.CRON_SECRET) {
|
|
return NextResponse.json({ error: 'CRON_SECRET not configured' }, { status: 503 })
|
|
}
|
|
if (!authorized(req)) {
|
|
return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
|
|
}
|
|
|
|
const admin = createAdminClient()
|
|
const { data: rows, error } = await admin
|
|
.from('notifications')
|
|
.select('id, recipient, subject, body_html, body_text, attempts')
|
|
.eq('status', 'pending')
|
|
.eq('channel', 'email')
|
|
.lt('attempts', MAX_NOTIFICATION_ATTEMPTS)
|
|
.order('created_at', { ascending: true })
|
|
.limit(BATCH)
|
|
|
|
if (error) return NextResponse.json({ error: error.message }, { status: 500 })
|
|
|
|
let sent = 0
|
|
let failed = 0
|
|
let retried = 0
|
|
|
|
for (const row of rows ?? []) {
|
|
const res = await sendEmail({
|
|
to: row.recipient as string,
|
|
subject: row.subject as string,
|
|
html: row.body_html as string,
|
|
text: row.body_text as string,
|
|
idempotencyKey: row.id as string,
|
|
})
|
|
|
|
if (res.ok) {
|
|
await admin
|
|
.from('notifications')
|
|
.update({ status: 'sent', sent_at: new Date().toISOString(), last_error: null })
|
|
.eq('id', row.id)
|
|
sent++
|
|
} else {
|
|
const attempts = (row.attempts as number) + 1
|
|
const terminal = !res.retryable || isTerminalAttempt(attempts)
|
|
await admin
|
|
.from('notifications')
|
|
.update({
|
|
status: terminal ? 'failed' : 'pending',
|
|
attempts,
|
|
last_error: res.error,
|
|
})
|
|
.eq('id', row.id)
|
|
if (terminal) failed++
|
|
else retried++
|
|
}
|
|
|
|
if (SPACING_MS) await sleep(SPACING_MS)
|
|
}
|
|
|
|
return NextResponse.json({ scanned: rows?.length ?? 0, sent, failed, retried })
|
|
}
|