import logging from decimal import Decimal import stripe from typing import Any, Dict, cast, Optional, Union from django.core import signing from django.http import HttpRequest, HttpResponse, HttpResponseRedirect from django.utils.timezone import now as timezone_now from django.utils.translation import ugettext as _ from django.shortcuts import render from django.urls import reverse from django.conf import settings from zerver.decorator import zulip_login_required, require_billing_access from zerver.lib.request import REQ, has_request_variables from zerver.lib.response import json_error, json_success from zerver.lib.validator import check_string, check_int from zerver.models import UserProfile from corporate.lib.stripe import STRIPE_PUBLISHABLE_KEY, \ stripe_get_customer, get_latest_seat_count, \ process_initial_upgrade, sign_string, \ unsign_string, BillingError, do_change_plan_status, do_replace_payment_source, \ MIN_INVOICED_LICENSES, DEFAULT_INVOICE_DAYS_UNTIL_DUE, \ start_of_next_billing_cycle, renewal_amount, \ make_end_of_cycle_updates_if_needed from corporate.models import CustomerPlan, get_current_plan_by_customer, \ get_customer_by_realm, get_current_plan_by_realm billing_logger = logging.getLogger('corporate.stripe') def unsign_seat_count(signed_seat_count: str, salt: str) -> int: try: return int(unsign_string(signed_seat_count, salt)) except signing.BadSignature: raise BillingError('tampered seat count') def check_upgrade_parameters( billing_modality: str, schedule: str, license_management: Optional[str], licenses: Optional[int], has_stripe_token: bool, seat_count: int) -> None: if billing_modality not in ['send_invoice', 'charge_automatically']: raise BillingError('unknown billing_modality') if schedule not in ['annual', 'monthly']: raise BillingError('unknown schedule') if license_management not in ['automatic', 'manual']: raise BillingError('unknown license_management') if billing_modality == 'charge_automatically': if not has_stripe_token: raise BillingError('autopay with no card') min_licenses = seat_count if billing_modality == 'send_invoice': min_licenses = max(seat_count, MIN_INVOICED_LICENSES) if licenses is None or licenses < min_licenses: raise BillingError('not enough licenses', _("You must invoice for at least {} users.").format(min_licenses)) # Should only be called if the customer is being charged automatically def payment_method_string(stripe_customer: stripe.Customer) -> str: stripe_source: Optional[Union[stripe.Card, stripe.Source]] = stripe_customer.default_source # In case of e.g. an expired card if stripe_source is None: # nocoverage return _("No payment method on file") if stripe_source.object == "card": return _("%(brand)s ending in %(last4)s") % { 'brand': cast(stripe.Card, stripe_source).brand, 'last4': cast(stripe.Card, stripe_source).last4} # There might be one-off stuff we do for a particular customer that # would land them here. E.g. by default we don't support ACH for # automatic payments, but in theory we could add it for a customer via # the Stripe dashboard. return _("Unknown payment method. Please contact %s.") % (settings.ZULIP_ADMINISTRATOR,) # nocoverage @has_request_variables def upgrade(request: HttpRequest, user: UserProfile, billing_modality: str=REQ(validator=check_string), schedule: str=REQ(validator=check_string), license_management: Optional[str]=REQ(validator=check_string, default=None), licenses: Optional[int]=REQ(validator=check_int, default=None), stripe_token: Optional[str]=REQ(validator=check_string, default=None), signed_seat_count: str=REQ(validator=check_string), salt: str=REQ(validator=check_string)) -> HttpResponse: try: seat_count = unsign_seat_count(signed_seat_count, salt) if billing_modality == 'charge_automatically' and license_management == 'automatic': licenses = seat_count if billing_modality == 'send_invoice': schedule = 'annual' license_management = 'manual' check_upgrade_parameters( billing_modality, schedule, license_management, licenses, stripe_token is not None, seat_count) assert licenses is not None automanage_licenses = license_management == 'automatic' billing_schedule = {'annual': CustomerPlan.ANNUAL, 'monthly': CustomerPlan.MONTHLY}[schedule] process_initial_upgrade(user, licenses, automanage_licenses, billing_schedule, stripe_token) except BillingError as e: if not settings.TEST_SUITE: # nocoverage billing_logger.warning( ("BillingError during upgrade: %s. user=%s, realm=%s (%s), billing_modality=%s, " "schedule=%s, license_management=%s, licenses=%s, has stripe_token: %s") % (e.description, user.id, user.realm.id, user.realm.string_id, billing_modality, schedule, license_management, licenses, stripe_token is not None)) return json_error(e.message, data={'error_description': e.description}) except Exception as e: billing_logger.exception("Uncaught exception in billing: %s" % (e,)) error_message = BillingError.CONTACT_SUPPORT error_description = "uncaught exception during upgrade" return json_error(error_message, data={'error_description': error_description}) else: return json_success() @zulip_login_required def initial_upgrade(request: HttpRequest) -> HttpResponse: if not settings.BILLING_ENABLED: return render(request, "404.html") user = request.user customer = get_customer_by_realm(user.realm) if customer is not None and get_current_plan_by_customer(customer) is not None: return HttpResponseRedirect(reverse('corporate.views.billing_home')) percent_off = Decimal(0) if customer is not None and customer.default_discount is not None: percent_off = customer.default_discount seat_count = get_latest_seat_count(user.realm) signed_seat_count, salt = sign_string(str(seat_count)) context: Dict[str, Any] = { 'publishable_key': STRIPE_PUBLISHABLE_KEY, 'email': user.delivery_email, 'seat_count': seat_count, 'signed_seat_count': signed_seat_count, 'salt': salt, 'min_invoiced_licenses': max(seat_count, MIN_INVOICED_LICENSES), 'default_invoice_days_until_due': DEFAULT_INVOICE_DAYS_UNTIL_DUE, 'plan': "Zulip Standard", 'page_params': { 'seat_count': seat_count, 'annual_price': 8000, 'monthly_price': 800, 'percent_off': float(percent_off), }, } response = render(request, 'corporate/upgrade.html', context=context) return response @zulip_login_required def billing_home(request: HttpRequest) -> HttpResponse: user = request.user customer = get_customer_by_realm(user.realm) if customer is None: return HttpResponseRedirect(reverse('corporate.views.initial_upgrade')) if not CustomerPlan.objects.filter(customer=customer).exists(): return HttpResponseRedirect(reverse('corporate.views.initial_upgrade')) if not user.is_realm_admin and not user.is_billing_admin: context: Dict[str, Any] = {'admin_access': False} return render(request, 'corporate/billing.html', context=context) context = { 'admin_access': True, 'has_active_plan': False, } plan = get_current_plan_by_customer(customer) if plan is not None: now = timezone_now() last_ledger_entry = make_end_of_cycle_updates_if_needed(plan, now) if last_ledger_entry is not None: plan_name = { CustomerPlan.STANDARD: 'Zulip Standard', CustomerPlan.PLUS: 'Zulip Plus', }[plan.tier] licenses = last_ledger_entry.licenses licenses_used = get_latest_seat_count(user.realm) # Should do this in javascript, using the user's timezone renewal_date = '{dt:%B} {dt.day}, {dt.year}'.format(dt=start_of_next_billing_cycle(plan, now)) renewal_cents = renewal_amount(plan, now) charge_automatically = plan.charge_automatically stripe_customer = stripe_get_customer(customer.stripe_customer_id) if charge_automatically: payment_method = payment_method_string(stripe_customer) else: payment_method = 'Billed by invoice' context.update({ 'plan_name': plan_name, 'has_active_plan': True, 'licenses': licenses, 'licenses_used': licenses_used, 'renewal_date': renewal_date, 'renewal_amount': '{:,.2f}'.format(renewal_cents / 100.), 'payment_method': payment_method, 'charge_automatically': charge_automatically, 'publishable_key': STRIPE_PUBLISHABLE_KEY, 'stripe_email': stripe_customer.email, }) return render(request, 'corporate/billing.html', context=context) @require_billing_access @has_request_variables def change_plan_at_end_of_cycle(request: HttpRequest, user: UserProfile, status: int=REQ("status", validator=check_int)) -> HttpResponse: assert(status in [CustomerPlan.ACTIVE, CustomerPlan.DOWNGRADE_AT_END_OF_CYCLE]) plan = get_current_plan_by_realm(user.realm) assert(plan is not None) # for mypy do_change_plan_status(plan, status) return json_success() @require_billing_access @has_request_variables def replace_payment_source(request: HttpRequest, user: UserProfile, stripe_token: str=REQ("stripe_token", validator=check_string)) -> HttpResponse: try: do_replace_payment_source(user, stripe_token, pay_invoices=True) except BillingError as e: return json_error(e.message, data={'error_description': e.description}) return json_success()