134 lines
6.8 KiB
Python
Executable File
134 lines
6.8 KiB
Python
Executable File
"""Canonical Stripe reads, not event arrival order, determine entitlements."""
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import logging
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from datetime import datetime, timezone as dt_timezone
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import stripe
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from django.conf import settings
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from django.core.exceptions import ImproperlyConfigured
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from django.db import transaction
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from django.utils import timezone
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from .directory import reconcile_groups
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from .models import Account, ManagedGroup, Subscription, WebhookEvent
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logger = logging.getLogger(__name__)
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def client():
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if not settings.STRIPE_SECRET_KEY:
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raise ImproperlyConfigured("STRIPE_SECRET_KEY is required.")
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return stripe.StripeClient(settings.STRIPE_SECRET_KEY, stripe_version=settings.STRIPE_API_VERSION, max_network_retries=1, http_client=stripe.RequestsClient(timeout=10)).v1
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def _id(value):
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return value.get("id") if isinstance(value, dict) else value
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def _paid_until(api, subscription, price_id, now):
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"""Recover paid time after outages, including when the latest invoice is open.
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Only paid recurring lines for the CURRENT price and subscription count.
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Positive prorations can grant an upgrade; credit lines cannot grant access.
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Pagination is essential: invoice headers' period_end is NOT the service end.
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"""
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end = None
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invoices = api.invoices.list({"subscription": subscription["id"], "status": "paid", "limit": 100})
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for invoice in invoices.auto_paging_iter():
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parent = (invoice.get("parent") or {}).get("subscription_details") or {}
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if _id(invoice.get("customer")) != _id(subscription["customer"]) or _id(parent.get("subscription")) != subscription["id"] or invoice.get("livemode") != settings.STRIPE_LIVE_MODE:
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continue
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lines = api.invoices.line_items.list(invoice["id"], {"limit": 100})
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for line in lines.auto_paging_iter():
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details = (line.get("parent") or {}).get("subscription_item_details") or {}
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price = ((line.get("pricing") or {}).get("price_details") or {}).get("price")
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period = line.get("period") or {}
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if _id(price) != price_id or _id(details.get("subscription")) != subscription["id"] or line.get("amount", -1) < 0:
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continue
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start, finish = period.get("start"), period.get("end")
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if not isinstance(start, int) or not isinstance(finish, int) or start > now.timestamp() or finish <= now.timestamp():
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continue
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candidate = datetime.fromtimestamp(finish, dt_timezone.utc)
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end = max(end, candidate) if end else candidate
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# No old invoice can provide future service after its successor's period.
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# Keep scanning for unusual billing/proration histories; never guess.
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return end
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def refresh_billing(account):
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"""Caller holds the account row lock. Commit only a complete Stripe snapshot."""
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if not account.stripe_customer:
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return
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api = client()
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now = timezone.now()
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snapshots = []
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prices = {tier["price_id"]: key for key, tier in settings.MEMBERSHIP_TIERS.items()}
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for sub in api.subscriptions.list({"customer": account.stripe_customer, "status": "all", "limit": 100}).auto_paging_iter():
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if _id(sub.get("customer")) != account.stripe_customer or sub.get("livemode") != settings.STRIPE_LIVE_MODE or (sub.get("metadata") or {}).get("membership_account") != str(account.pk):
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continue
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items = sub.get("items") or {}
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data = items.get("data") or []
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price_id = _id(data[0].get("price")) if len(data) == 1 and not items.get("has_more") else None
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tier = prices.get(price_id, "")
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eligible = tier and sub.get("status") in {"active", "past_due"} and not sub.get("pause_collection")
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paid_until = _paid_until(api, sub, price_id, now) if eligible else None
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if paid_until and sub.get("cancel_at"):
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paid_until = min(paid_until, datetime.fromtimestamp(sub["cancel_at"], dt_timezone.utc))
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snapshots.append((sub["id"], {"tier": tier, "status": sub["status"], "paid_until": paid_until, "cancel_at_period_end": bool(sub.get("cancel_at_period_end"))}))
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# Do not partially overwrite paid time if a later Stripe page/read fails.
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with transaction.atomic():
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seen = []
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for stripe_id, values in snapshots:
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Subscription.objects.update_or_create(stripe_id=stripe_id, account=account, defaults=values)
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seen.append(stripe_id)
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Subscription.objects.filter(account=account).exclude(stripe_id__in=seen).update(status="missing", paid_until=None)
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account.last_billing_sync = now
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account.save(update_fields=["last_billing_sync"])
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def apply_groups(account):
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now = timezone.now()
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desired = set()
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for sub in Subscription.objects.filter(account=account, status__in=["active", "past_due"], paid_until__gt=now):
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tier = settings.MEMBERSHIP_TIERS.get(sub.tier)
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if tier:
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desired.add(tier["group_dn"])
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managed = set(ManagedGroup.objects.filter(account=account).values_list("dn", flat=True))
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account.ldap_dn = reconcile_groups(account, desired, managed) if managed else account.ldap_dn
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account.last_ldap_sync = now
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account.save(update_fields=["ldap_dn", "last_ldap_sync"])
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return len(desired)
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def sync_account(account_id, refresh_stripe=True):
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"""Serialize Stripe/LDAP writes per account across web and worker processes.
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Local expiry runs even when Stripe is unreachable. LDAP failure is retried on
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the next pass, with persisted managed DNs allowing crash-safe revocation.
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"""
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# Commit management intent independently before external side effects. If
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# LDAP succeeds but a later DB commit fails, the next sweep still knows
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# which old groups to revoke, even after the tier is removed from config.
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with transaction.atomic():
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account = Account.objects.select_for_update().get(pk=account_id)
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for tier in settings.MEMBERSHIP_TIERS.values():
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ManagedGroup.objects.get_or_create(account=account, dn=tier["group_dn"])
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with transaction.atomic():
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account = Account.objects.select_for_update().get(pk=account_id)
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# Never hold local expiry hostage to an invoice-history API read.
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count = apply_groups(account)
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if not refresh_stripe:
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return True
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billing_ok = True
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try:
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refresh_billing(account)
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except Exception as exc:
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billing_ok = False
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logger.error("Billing refresh failed account=%s kind=%s", account.pk, type(exc).__name__)
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now = timezone.now()
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count = apply_groups(account)
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if billing_ok:
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WebhookEvent.objects.filter(account=account, processed_at__isnull=True).update(processed_at=now)
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logger.info("Membership reconciled account=%s groups=%s billing_ok=%s", account.pk, count, billing_ok)
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return billing_ok
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