chore: import upstream snapshot with attribution

apps/sim/app/api/demo-requests/route.ts

@@ -0,0 +1,98 @@
+import { createLogger } from '@sim/logger'
+import { type NextRequest, NextResponse } from 'next/server'
+import {
+  getDemoRequestCompanySizeLabel,
+  submitDemoRequestContract,
+} from '@/lib/api/contracts/demo-requests'
+import { parseRequest } from '@/lib/api/server'
+import { env } from '@/lib/core/config/env'
+import type { TokenBucketConfig } from '@/lib/core/rate-limiter'
+import { RateLimiter } from '@/lib/core/rate-limiter'
+import { generateRequestId, getClientIp } from '@/lib/core/utils/request'
+import { getEmailDomain } from '@/lib/core/utils/urls'
+import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
+import { sendEmail } from '@/lib/messaging/email/mailer'
+import { getFromEmailAddress } from '@/lib/messaging/email/utils'
+
+const logger = createLogger('DemoRequestAPI')
+const rateLimiter = new RateLimiter()
+
+const PUBLIC_ENDPOINT_RATE_LIMIT: TokenBucketConfig = {
+  maxTokens: 10,
+  refillRate: 5,
+  refillIntervalMs: 60_000,
+}
+
+export const POST = withRouteHandler(async (req: NextRequest) => {
+  const requestId = generateRequestId()
+
+  try {
+    const ip = getClientIp(req)
+    const storageKey = `public:demo-request:${ip}`
+
+    const { allowed, remaining, resetAt } = await rateLimiter.checkRateLimitDirect(
+      storageKey,
+      PUBLIC_ENDPOINT_RATE_LIMIT
+    )
+
+    if (!allowed) {
+      logger.warn(`[${requestId}] Rate limit exceeded for IP ${ip}`, { remaining, resetAt })
+      return NextResponse.json(
+        { error: 'Too many requests. Please try again later.' },
+        {
+          status: 429,
+          headers: { 'Retry-After': String(Math.ceil((resetAt.getTime() - Date.now()) / 1000)) },
+        }
+      )
+    }
+
+    const parsed = await parseRequest(submitDemoRequestContract, req, {})
+    if (!parsed.success) {
+      logger.warn(`[${requestId}] Invalid demo request data`)
+      return parsed.response
+    }
+
+    const { firstName, lastName, companyEmail, phoneNumber, companySize, details } =
+      parsed.data.body
+
+    logger.info(`[${requestId}] Processing demo request`, {
+      email: `${companyEmail.substring(0, 3)}***`,
+      companySize,
+    })
+
+    const emailText = `Demo request submitted
+Submitted: ${new Date().toISOString()}
+Name: ${firstName} ${lastName}
+Email: ${companyEmail}
+Phone: ${phoneNumber ?? 'Not provided'}
+Company size: ${getDemoRequestCompanySizeLabel(companySize)}
+
+Details:
+${details}
+`
+
+    const emailResult = await sendEmail({
+      to: [`enterprise@${env.EMAIL_DOMAIN || getEmailDomain()}`],
+      subject: `[DEMO REQUEST] ${firstName} ${lastName}`,
+      text: emailText,
+      from: getFromEmailAddress(),
+      replyTo: companyEmail,
+      emailType: 'transactional',
+    })
+
+    if (!emailResult.success) {
+      logger.error(`[${requestId}] Error sending demo request email`, emailResult.message)
+      return NextResponse.json({ error: 'Failed to submit request' }, { status: 500 })
+    }
+
+    logger.info(`[${requestId}] Demo request email sent successfully`)
+
+    return NextResponse.json(
+      { success: true, message: 'Thanks! Our team will reach out shortly.' },
+      { status: 201 }
+    )
+  } catch (error) {
+    logger.error(`[${requestId}] Error processing demo request`, error)
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 })
+  }
+})