mirror of
https://github.com/PostHog/posthog.git
synced 2024-11-28 00:46:45 +01:00
279 lines
9.8 KiB
Python
279 lines
9.8 KiB
Python
import calendar
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from datetime import datetime, time, timedelta
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from typing import Any, Dict, Optional, Tuple
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import jwt
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import posthoganalytics
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import pytz
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import requests
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import structlog
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from django.conf import settings
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from django.core.cache import cache
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from django.http import HttpRequest, HttpResponse
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from django.shortcuts import redirect
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from django.utils import timezone
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from rest_framework import serializers, status, viewsets
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from rest_framework.authentication import BasicAuthentication, SessionAuthentication
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from rest_framework.decorators import action
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from rest_framework.exceptions import NotAuthenticated, NotFound, PermissionDenied, ValidationError
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from rest_framework.request import Request
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from rest_framework.response import Response
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from ee.models import License
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from ee.settings import BILLING_SERVICE_URL
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from posthog.auth import PersonalAPIKeyAuthentication
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from posthog.models import Organization
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from posthog.models.event.util import get_event_count_for_team_and_period
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from posthog.models.session_recording_event.util import get_recording_count_for_team_and_period
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from posthog.models.team.team import Team
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logger = structlog.get_logger(__name__)
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BILLING_SERVICE_JWT_AUD = "posthog:license-key"
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class BillingSerializer(serializers.Serializer):
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plan = serializers.CharField(max_length=100)
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billing_limit = serializers.IntegerField()
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class LicenseKeySerializer(serializers.Serializer):
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license = serializers.CharField()
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def build_billing_token(license: License, organization_id: str):
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if not organization_id or not license:
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raise NotAuthenticated()
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license_id = license.key.split("::")[0]
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license_secret = license.key.split("::")[1]
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encoded_jwt = jwt.encode(
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{
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"exp": datetime.now(tz=timezone.utc) + timedelta(minutes=15),
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"id": license_id,
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"organization_id": str(organization_id),
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"aud": "posthog:license-key",
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},
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license_secret,
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algorithm="HS256",
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)
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return encoded_jwt
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def get_this_month_date_range() -> Tuple[datetime, datetime]:
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now = datetime.utcnow()
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date_range: Tuple[int, int] = calendar.monthrange(now.year, now.month)
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start_time: datetime = datetime.combine(
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datetime(now.year, now.month, 1),
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time.min,
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).replace(tzinfo=pytz.UTC)
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end_time: datetime = datetime.combine(
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datetime(now.year, now.month, date_range[1]),
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time.max,
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).replace(tzinfo=pytz.UTC)
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return (start_time, end_time)
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def get_cached_current_usage(organization: Organization) -> Dict[str, int]:
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"""
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Calculate the actual current usage for an organization - only used if a subscription does not exist
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"""
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cache_key: str = f"monthly_usage_{organization.id}"
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usage: Optional[Dict[str, int]] = cache.get(cache_key)
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if usage is None:
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teams = Team.objects.filter(organization=organization).exclude(organization__for_internal_metrics=True)
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usage = {
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"EVENTS": 0,
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"RECORDINGS": 0,
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}
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for team in teams:
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(start_period, end_period) = get_this_month_date_range()
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usage["RECORDINGS"] += get_recording_count_for_team_and_period(team.id, start_period, end_period)
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usage["EVENTS"] += get_event_count_for_team_and_period(team.id, start_period, end_period)
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cache.set(
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cache_key,
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usage,
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min(
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settings.BILLING_USAGE_CACHING_TTL,
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(end_period - timezone.now()).total_seconds(),
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),
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)
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return usage
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def handle_billing_service_error(res: requests.Response, valid_codes=(200, 404)) -> None:
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if res.status_code not in valid_codes:
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logger.error(f"Billing service returned bad status code: {res.status_code}, body: {res.text}")
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raise Exception(f"Billing service returned bad status code: {res.status_code}")
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class BillingViewset(viewsets.GenericViewSet):
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serializer_class = BillingSerializer
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authentication_classes = [
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PersonalAPIKeyAuthentication,
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SessionAuthentication,
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BasicAuthentication,
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]
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def list(self, request: HttpRequest, *args: Any, **kwargs: Any) -> Response:
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license = License.objects.first_valid()
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org = self._get_org()
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# If on Cloud and we have the property billing - return 404 as we always use legacy billing it it exists
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if hasattr(org, "billing"):
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if org.billing.stripe_subscription_id: # type: ignore
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raise NotFound("Billing V1 is active for this organization")
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response: Dict[str, Any] = {}
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if org and license and license.is_v2_license:
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response["license"] = {"plan": license.plan}
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billing_service_token = build_billing_token(license, str(org.id))
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res = requests.get(
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f"{BILLING_SERVICE_URL}/api/billing",
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headers={"Authorization": f"Bearer {billing_service_token}"},
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)
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handle_billing_service_error(res)
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data = res.json()
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if data.get("license"):
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self._update_license_details(license, data["license"])
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if data.get("customer"):
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response.update(data["customer"])
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# If there isn't a valid v2 subscription then we only return sucessfully if BILLING_V2_ENABLED
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if not response.get("has_active_subscription") and not settings.BILLING_V2_ENABLED:
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distinct_id = None if self.request.user.is_anonymous else self.request.user.distinct_id
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if not (distinct_id and posthoganalytics.get_feature_flag("billing-v2-enabled", distinct_id)):
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raise NotFound("Billing V2 is not enabled for this organization")
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# The default response is used if there is no subscription
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if not response.get("products"):
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products = self._get_products()
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calculated_usage = get_cached_current_usage(org) if org else None
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if calculated_usage is not None:
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for product in products:
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if product["type"] in calculated_usage:
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product["current_usage"] = calculated_usage[product["type"]]
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response["products"] = products
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return Response(response)
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@action(methods=["PATCH"], detail=False, url_path="/")
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def patch(self, request: Request, *args: Any, **kwargs: Any) -> Response:
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license = License.objects.first_valid()
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if not license:
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raise Exception("There is no license configured for this instance yet.")
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org = self._get_org_required()
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billing_service_token = build_billing_token(license, str(org.id))
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res = requests.patch(
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f"{BILLING_SERVICE_URL}/api/billing/",
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headers={"Authorization": f"Bearer {billing_service_token}"},
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json={"custom_limits_usd": request.data.get("custom_limits_usd")},
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)
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handle_billing_service_error(res)
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res = requests.get(
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f"{BILLING_SERVICE_URL}/api/billing/",
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headers={"Authorization": f"Bearer {billing_service_token}"},
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)
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handle_billing_service_error(res)
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return Response(res.json()["customer"])
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@action(methods=["GET"], detail=False)
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def activation(self, request: Request, *args: Any, **kwargs: Any) -> HttpResponse:
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license = License.objects.first_valid()
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organization = self._get_org_required()
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redirect_uri = f"{settings.SITE_URL or request.headers.get('Host')}/organization/billing"
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url = f"{BILLING_SERVICE_URL}/activation?redirect_uri={redirect_uri}&organization_name={organization.name}"
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if license:
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billing_service_token = build_billing_token(license, str(organization.id))
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url = f"{url}&token={billing_service_token}"
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return redirect(url)
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@action(methods=["PATCH"], detail=False)
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def license(self, request: Request, *args: Any, **kwargs: Any) -> HttpResponse:
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license = License.objects.first_valid()
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if license:
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raise PermissionDenied(
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"A valid license key already exists. This must be removed before a new one can be added."
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)
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organization = self._get_org_required()
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serializer = LicenseKeySerializer(data=request.data)
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if not serializer.is_valid():
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return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
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license = License(key=serializer.validated_data["license"])
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res = requests.get(
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f"{BILLING_SERVICE_URL}/api/billing",
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headers={"Authorization": f"Bearer {build_billing_token(license, str(organization.id))}"},
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)
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if res.status_code != 200:
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raise ValidationError(
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{
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"license": f"License could not be activated. Please contact support. (BillingService status {res.status_code})",
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}
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)
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data = res.json()
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self._update_license_details(license, data["license"])
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return Response({"success": True})
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def _get_org(self) -> Optional[Organization]:
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org = None if self.request.user.is_anonymous else self.request.user.organization
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return org
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def _get_org_required(self) -> Organization:
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org = self._get_org()
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if not org:
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raise Exception("You cannot setup billing without an organization configured.")
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return org
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def _get_products(self):
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res = requests.get(
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f"{BILLING_SERVICE_URL}/api/products",
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)
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handle_billing_service_error(res)
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return res.json()["products"]
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def _update_license_details(self, license: License, data: Dict[str, Any]) -> License:
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"""
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Ensure the license details are up-to-date locally
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"""
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license.valid_until = data["valid_until"]
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license.plan = data["type"]
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license.save()
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return license
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