import logging import stripe from typing import Any, Dict, Optional, Tuple, cast from django.core import signing from django.http import HttpRequest, HttpResponse, HttpResponseRedirect from django.utils import timezone from django.utils.translation import ugettext as _, ugettext as err_ from django.shortcuts import redirect, render from django.urls import reverse from django.conf import settings from zerver.decorator import zulip_login_required, require_billing_access from zerver.lib.json_encoder_for_html import JSONEncoderForHTML 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 from zerver.lib.timestamp import timestamp_to_datetime from zerver.models import UserProfile, Realm from corporate.lib.stripe import STRIPE_PUBLISHABLE_KEY, \ stripe_get_customer, upcoming_invoice_total, get_seat_count, \ extract_current_subscription, process_initial_upgrade, sign_string, \ unsign_string, BillingError, process_downgrade, do_replace_payment_source, \ MIN_INVOICED_SEAT_COUNT, DEFAULT_INVOICE_DAYS_UNTIL_DUE from corporate.models import Customer, Plan billing_logger = logging.getLogger('corporate.stripe') def unsign_and_check_upgrade_parameters(user: UserProfile, plan_nickname: str, signed_seat_count: str, salt: str, billing_modality: str) -> Tuple[Plan, int]: provided_plans = { 'charge_automatically': [Plan.CLOUD_ANNUAL, Plan.CLOUD_MONTHLY], 'send_invoice': [Plan.CLOUD_ANNUAL], } if plan_nickname not in provided_plans[billing_modality]: billing_logger.warning("Tampered plan during realm upgrade. user: %s, realm: %s (%s)." % (user.id, user.realm.id, user.realm.string_id)) raise BillingError('tampered plan', BillingError.CONTACT_SUPPORT) plan = Plan.objects.get(nickname=plan_nickname) try: seat_count = int(unsign_string(signed_seat_count, salt)) except signing.BadSignature: billing_logger.warning("Tampered seat count during realm upgrade. user: %s, realm: %s (%s)." % (user.id, user.realm.id, user.realm.string_id)) raise BillingError('tampered seat count', BillingError.CONTACT_SUPPORT) return plan, seat_count def payment_method_string(stripe_customer: stripe.Customer) -> str: subscription = extract_current_subscription(stripe_customer) if subscription is not None and subscription.billing == "send_invoice": return _("Billed by invoice") 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 _("Card ending in %(last4)s" % {'last4': cast(stripe.Card, stripe_source).last4}) # You can get here if e.g. you sign up to pay by invoice, and then # immediately downgrade. In that case, stripe_source.object == 'source', # and stripe_source.type = 'ach_credit_transfer'. # Using a catch-all error message here since 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 @zulip_login_required def initial_upgrade(request: HttpRequest) -> HttpResponse: if not settings.BILLING_ENABLED: return render(request, "404.html") user = request.user error_message = "" error_description = "" # only used in tests customer = Customer.objects.filter(realm=user.realm).first() if customer is not None and customer.has_billing_relationship: return HttpResponseRedirect(reverse('corporate.views.billing_home')) percent_off = 0 if customer is not None: stripe_customer = stripe_get_customer(customer.stripe_customer_id) if stripe_customer.discount is not None: percent_off = stripe_customer.discount.coupon.percent_off if request.method == 'POST': try: plan, seat_count = unsign_and_check_upgrade_parameters( user, request.POST['plan'], request.POST['signed_seat_count'], request.POST['salt'], request.POST['billing_modality']) if request.POST['billing_modality'] == 'send_invoice': try: invoiced_seat_count = int(request.POST['invoiced_seat_count']) except (KeyError, ValueError): invoiced_seat_count = -1 min_required_seat_count = max(seat_count, MIN_INVOICED_SEAT_COUNT) if invoiced_seat_count < min_required_seat_count: raise BillingError( 'lowball seat count', "You must invoice for at least %d users." % (min_required_seat_count,)) seat_count = invoiced_seat_count process_initial_upgrade(user, plan, seat_count, request.POST.get('stripe_token', None)) except BillingError as e: error_message = e.message 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" else: return HttpResponseRedirect(reverse('corporate.views.billing_home')) seat_count = get_seat_count(user.realm) signed_seat_count, salt = sign_string(str(seat_count)) context = { 'publishable_key': STRIPE_PUBLISHABLE_KEY, 'email': user.email, 'seat_count': seat_count, 'signed_seat_count': signed_seat_count, 'salt': salt, 'min_seat_count_for_invoice': max(seat_count, MIN_INVOICED_SEAT_COUNT), 'default_invoice_days_until_due': DEFAULT_INVOICE_DAYS_UNTIL_DUE, 'plan': "Zulip Standard", 'nickname_monthly': Plan.CLOUD_MONTHLY, 'nickname_annual': Plan.CLOUD_ANNUAL, 'error_message': error_message, 'page_params': JSONEncoderForHTML().encode({ 'seat_count': seat_count, 'nickname_annual': Plan.CLOUD_ANNUAL, 'nickname_monthly': Plan.CLOUD_MONTHLY, 'annual_price': 8000, 'monthly_price': 800, 'percent_off': percent_off, }), } # type: Dict[str, Any] response = render(request, 'corporate/upgrade.html', context=context) response['error_description'] = error_description return response PLAN_NAMES = { Plan.CLOUD_ANNUAL: "Zulip Standard (billed annually)", Plan.CLOUD_MONTHLY: "Zulip Standard (billed monthly)", } @zulip_login_required def billing_home(request: HttpRequest) -> HttpResponse: user = request.user customer = Customer.objects.filter(realm=user.realm).first() if customer is None: return HttpResponseRedirect(reverse('corporate.views.initial_upgrade')) if not customer.has_billing_relationship: return HttpResponseRedirect(reverse('corporate.views.initial_upgrade')) if not user.is_realm_admin and not user.is_billing_admin: context = {'admin_access': False} # type: Dict[str, Any] return render(request, 'corporate/billing.html', context=context) context = {'admin_access': True} stripe_customer = stripe_get_customer(customer.stripe_customer_id) if stripe_customer.account_balance > 0: # nocoverage, waiting for mock_stripe to mature context.update({'account_charges': '{:,.2f}'.format(stripe_customer.account_balance / 100.)}) if stripe_customer.account_balance < 0: # nocoverage context.update({'account_credits': '{:,.2f}'.format(-stripe_customer.account_balance / 100.)}) billed_by_invoice = False subscription = extract_current_subscription(stripe_customer) if subscription: plan_name = PLAN_NAMES[Plan.objects.get(stripe_plan_id=subscription.plan.id).nickname] seat_count = subscription.quantity # Need user's timezone to do this properly renewal_date = '{dt:%B} {dt.day}, {dt.year}'.format( dt=timestamp_to_datetime(subscription.current_period_end)) renewal_amount = upcoming_invoice_total(customer.stripe_customer_id) if subscription.billing == 'send_invoice': billed_by_invoice = True # Can only get here by subscribing and then downgrading. We don't support downgrading # yet, but keeping this code here since we will soon. else: # nocoverage plan_name = "Zulip Free" seat_count = 0 renewal_date = '' renewal_amount = 0 context.update({ 'plan_name': plan_name, 'seat_count': seat_count, 'renewal_date': renewal_date, 'renewal_amount': '{:,.2f}'.format(renewal_amount / 100.), 'payment_method': payment_method_string(stripe_customer), 'billed_by_invoice': billed_by_invoice, 'publishable_key': STRIPE_PUBLISHABLE_KEY, 'stripe_email': stripe_customer.email, }) return render(request, 'corporate/billing.html', context=context) @require_billing_access def downgrade(request: HttpRequest, user: UserProfile) -> HttpResponse: try: process_downgrade(user) except BillingError as e: return json_error(e.message, data={'error_description': e.description}) 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) except BillingError as e: return json_error(e.message, data={'error_description': e.description}) return json_success()