westfarn
ad44359804
Unit Tests / test (push) Successful in 10s
## Summary - Closes #21 — new Django `finance` app with Stripe as payment provider - Subscription price defaults to **$10 USD / month** via `SUBSCRIPTION_PRICE_AMOUNT_CENTS = 1000` in `settings.py` (env-overridable) - Persists **Invoice** and **Payment** rows; both registered in Django admin (with payment inline on invoices) - Checkout Session API redirects users to Stripe hosted payment; webhook verifies signatures and upserts ledger idempotently ## API - `POST /api/finance/checkout/` — JWT auth → `{ checkout_url, session_id }` - `GET /api/finance/invoices/` / `GET /api/finance/payments/` — own records - `POST /api/finance/webhooks/stripe/` — Stripe signature-verified webhook ## Config Documented in `.env.example` / `.env.prod.example`: `STRIPE_SECRET_KEY`, `STRIPE_PUBLISHABLE_KEY`, `STRIPE_WEBHOOK_SECRET`, optional `STRIPE_PRICE_ID`, `FRONTEND_BASE_URL` ## Test plan - [x] `uv run python manage.py test finance` (17 tests) - [ ] Set Stripe test keys locally; create checkout session; complete payment in Stripe test mode - [ ] Confirm Invoice/Payment appear in `/admin/` - [ ] Point Stripe webhook to `/api/finance/webhooks/stripe/` and verify `checkout.session.completed` / `invoice.paid`Reviewed-on: #23
72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
"""Stripe Checkout session helpers."""
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from __future__ import annotations
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from typing import Any
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import stripe
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from django.conf import settings
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class StripeNotConfiguredError(RuntimeError):
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"""Raised when Stripe secret key is missing."""
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def configure_stripe() -> str:
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secret = settings.STRIPE_SECRET_KEY
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if not secret:
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raise StripeNotConfiguredError(
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"STRIPE_SECRET_KEY is not configured. Set it in the environment."
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)
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stripe.api_key = secret
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return secret
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def subscription_line_items() -> list[dict[str, Any]]:
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"""Build Checkout line_items from settings-backed subscription pricing."""
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price_id = settings.STRIPE_PRICE_ID
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if price_id:
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return [{"price": price_id, "quantity": 1}]
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return [
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{
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"price_data": {
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"currency": settings.SUBSCRIPTION_PRICE_CURRENCY,
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"unit_amount": settings.SUBSCRIPTION_PRICE_AMOUNT_CENTS,
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"recurring": {"interval": settings.SUBSCRIPTION_PRICE_INTERVAL},
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"product_data": {
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"name": settings.SUBSCRIPTION_PRODUCT_NAME,
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},
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},
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"quantity": 1,
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}
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]
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def create_checkout_session(
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*,
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user,
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success_url: str | None = None,
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cancel_url: str | None = None,
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):
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"""Create a Stripe Checkout Session for the subscription plan."""
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configure_stripe()
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metadata = {
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"user_id": str(user.pk),
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"company_id": str(user.company_id) if user.company_id else "",
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}
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customer_email = getattr(user, "email", None) or None
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session = stripe.checkout.Session.create(
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mode="subscription",
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line_items=subscription_line_items(),
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success_url=success_url or settings.STRIPE_CHECKOUT_SUCCESS_URL,
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cancel_url=cancel_url or settings.STRIPE_CHECKOUT_CANCEL_URL,
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customer_email=customer_email,
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client_reference_id=str(user.pk),
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metadata=metadata,
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subscription_data={"metadata": metadata},
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)
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return session
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