import asyncio
import datetime
import logging
from fastapi import APIRouter, Depends, Request
from fastapi.responses import HTMLResponse
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from app.brevo import add_contact_to_list, send_confirmation_email
from app.config import settings
from app.db import get_db
from app.rate_limit import _get_client_ip
from app.schemas import WaitlistRequest, WaitlistResponse
from app.models import WaitlistEntry
from app.token import generate_token, verify_token
logger = logging.getLogger(__name__)
router = APIRouter()
@router.post("/waitlist", response_model=WaitlistResponse)
async def join_waitlist(
body: WaitlistRequest,
request: Request,
db: AsyncSession = Depends(get_db),
) -> WaitlistResponse:
"""
Add an email to the waitlist.
- Honeypot: if `website` field is non-empty, silently succeed (bot trap).
- Duplicate emails: idempotent — returns success without error.
- Stores the Cloudflare-resolved client IP for analytics (not exposed).
- Sends a confirmation email via Brevo (fire-and-forget).
- Records consent timestamp (GDPR Art. 7).
"""
# Honeypot — bots fill hidden fields; silently "succeed"
if body.website:
return WaitlistResponse()
email = body.email.lower().strip()
ip = _get_client_ip(request)
now = datetime.datetime.now(datetime.timezone.utc)
# Check for existing entry — idempotent
existing = await db.execute(
select(WaitlistEntry).where(WaitlistEntry.email == email)
)
entry = existing.scalar_one_or_none()
if entry is not None:
# Re-send confirmation if not yet confirmed (and not anonymized)
if not entry.confirmed and not entry.anonymized_at and settings.brevo_configured:
token = generate_token(email)
confirm_url = f"{settings.CONFIRM_BASE_URL}/api/v1/waitlist/confirm?token={token}"
unsub_url = f"{settings.CONFIRM_BASE_URL}/api/v1/waitlist/unsubscribe?token={token}"
asyncio.create_task(send_confirmation_email(email, confirm_url, unsub_url))
return WaitlistResponse()
entry = WaitlistEntry(
email=email,
ip_address=ip,
source="website",
consent_given_at=now,
)
db.add(entry)
await db.commit()
logger.info("New waitlist signup: %s***", email[:3])
# Fire-and-forget: send confirmation email via Brevo
if settings.brevo_configured:
token = generate_token(email)
confirm_url = f"{settings.CONFIRM_BASE_URL}/api/v1/waitlist/confirm?token={token}"
unsub_url = f"{settings.CONFIRM_BASE_URL}/api/v1/waitlist/unsubscribe?token={token}"
asyncio.create_task(send_confirmation_email(email, confirm_url, unsub_url))
return WaitlistResponse()
@router.get("/waitlist/confirm", response_class=HTMLResponse)
async def confirm_email(
token: str,
db: AsyncSession = Depends(get_db),
) -> HTMLResponse:
"""
Double opt-in confirmation endpoint.
Verifies the HMAC token, marks the entry as confirmed,
and syncs the contact to Brevo.
"""
email = verify_token(token)
if email is None:
return HTMLResponse(content=_result_page(success=False), status_code=400)
result = await db.execute(
select(WaitlistEntry).where(WaitlistEntry.email == email)
)
entry = result.scalar_one_or_none()
if entry is None:
return HTMLResponse(content=_result_page(success=False), status_code=400)
if not entry.confirmed:
entry.confirmed = True
# Clear IP now that consent is confirmed — no longer needed
entry.ip_address = None
await db.commit()
logger.info("Email confirmed: %s***", email[:3])
# Sync confirmed contact to Brevo list (fire-and-forget)
if settings.brevo_configured:
asyncio.create_task(add_contact_to_list(email))
return HTMLResponse(content=_result_page(success=True))
@router.get("/waitlist/unsubscribe", response_class=HTMLResponse)
async def unsubscribe(
token: str,
db: AsyncSession = Depends(get_db),
) -> HTMLResponse:
"""
GDPR erasure (Art. 17) — anonymize the entry.
Uses the same HMAC token system as confirmation.
"""
email = verify_token(token)
if email is None:
return HTMLResponse(
content=_result_page(success=False, variant="unsubscribe"),
status_code=400,
)
result = await db.execute(
select(WaitlistEntry).where(WaitlistEntry.email == email)
)
entry = result.scalar_one_or_none()
if entry is None:
# Already gone — show success anyway (idempotent)
return HTMLResponse(content=_result_page(success=True, variant="unsubscribe"))
_anonymize_entry(entry)
await db.commit()
logger.info("Waitlist entry anonymized (unsubscribe)")
return HTMLResponse(content=_result_page(success=True, variant="unsubscribe"))
def _anonymize_entry(entry: WaitlistEntry) -> None:
"""Strip all PII from a waitlist entry, keeping only anonymous analytics."""
now = datetime.datetime.now(datetime.timezone.utc)
entry.email = f"anon-{entry.id}@removed.invalid"
entry.ip_address = None
entry.consent_given_at = None
entry.anonymized_at = now
def _result_page(*, success: bool, variant: str = "confirm") -> str:
"""Branded HTML response for confirmation/unsubscribe result."""
if variant == "unsubscribe":
if success:
title = "Data removed"
message = "Your personal data has been anonymized. You will not receive any further emails from us."
icon_bg = "rgba(251,200,129,0.12)"
icon_border = "rgba(251,200,129,0.25)"
icon_svg = ''
else:
title = "Invalid or expired link"
message = "This unsubscribe link is no longer valid. Contact privacy@adiuvai.com if you need help."
icon_bg = "rgba(220,38,38,0.08)"
icon_border = "rgba(220,38,38,0.18)"
icon_svg = ''
elif success:
title = "You’re confirmed!"
message = "Your email has been verified. We’ll notify you when adiuvAI is ready."
icon_bg = "rgba(251,200,129,0.12)"
icon_border = "rgba(251,200,129,0.25)"
icon_svg = ''
else:
title = "Invalid or expired link"
message = "This confirmation link is no longer valid. Please sign up again."
icon_bg = "rgba(220,38,38,0.08)"
icon_border = "rgba(220,38,38,0.18)"
icon_svg = ''
return f"""\
{title} — adiuvAI
"""