255 lines
8.4 KiB
Python
255 lines
8.4 KiB
Python
import stripe
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import stripe.error
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import logging
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import datetime
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from django.core.exceptions import ObjectDoesNotExist, ValidationError
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from django.conf import settings
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from django.contrib.auth import get_user_model
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from .models import StripeCustomer, StripeCreditCard
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logger = logging.getLogger(__name__)
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CURRENCY = 'chf'
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stripe.api_key = settings.STRIPE_KEY
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def handle_stripe_error(f):
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def handle_problems(*args, **kwargs):
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response = {
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'paid': False,
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'response_object': None,
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'error': None
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}
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common_message = "Currently it is not possible to make payments. Please try agin later."
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try:
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response_object = f(*args, **kwargs)
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return response_object
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except stripe.error.CardError as e:
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# Since it's a decline, stripe.error.CardError will be caught
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body = e.json_body
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logging.error(str(e))
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raise e # For error handling.
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except stripe.error.RateLimitError:
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logging.error("Too many requests made to the API too quickly.")
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raise Exception(common_message)
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except stripe.error.InvalidRequestError as e:
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logging.error(str(e))
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raise Exception('Invalid parameters.')
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except stripe.error.AuthenticationError as e:
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# Authentication with Stripe's API failed
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# (maybe you changed API keys recently)
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logging.error(str(e))
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raise Exception(common_message)
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except stripe.error.APIConnectionError as e:
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logging.error(str(e))
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raise Exception(common_message)
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except stripe.error.StripeError as e:
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# XXX: maybe send email
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logging.error(str(e))
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raise Exception(common_message)
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return handle_problems
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def public_api_key():
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return settings.STRIPE_PUBLIC_KEY
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def get_customer_id_for(user):
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try:
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# .get() raise if there is no matching entry.
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return StripeCustomer.objects.get(owner=user).stripe_id
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except ObjectDoesNotExist:
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# No entry yet - making a new one.
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try:
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customer = create_customer(user.username, user.email)
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uncloud_stripe_mapping = StripeCustomer.objects.create(
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owner=user, stripe_id=customer.id)
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return uncloud_stripe_mapping.stripe_id
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except Exception as e:
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return None
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@handle_stripe_error
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def create_setup_intent(customer_id):
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return stripe.SetupIntent.create(customer=customer_id)
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@handle_stripe_error
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def get_setup_intent(setup_intent_id):
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return stripe.SetupIntent.retrieve(setup_intent_id)
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@handle_stripe_error
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def get_payment_method(payment_method_id):
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return stripe.PaymentMethod.retrieve(payment_method_id)
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@handle_stripe_error
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def get_card_from_payment(user, payment_method_id):
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payment_method = stripe.PaymentMethod.retrieve(payment_method_id)
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if payment_method:
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if 'card' in payment_method:
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sync_cards_for_user(user)
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return payment_method['card']
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return False
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@handle_stripe_error
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def attach_payment_method(payment_method_id, user):
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customer_id = get_customer_id_for(user)
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ret = stripe.PaymentMethod.attach(payment_method_id, customer=customer_id)
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sync_cards_for_user(user)
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return ret
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@handle_stripe_error
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def create_customer(name, email):
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return stripe.Customer.create(name=name, email=email)
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@handle_stripe_error
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def get_customer(customer_id):
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return stripe.Customer.retrieve(customer_id)
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@handle_stripe_error
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def get_customer_cards(customer_id):
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cards = []
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stripe_cards = stripe.PaymentMethod.list(
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customer=customer_id,
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type="card",
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)
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for stripe_card in stripe_cards["data"]:
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card = {}
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card['brand'] = stripe_card["card"]["brand"]
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card['last4'] = stripe_card["card"]["last4"]
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card['month'] = stripe_card["card"]["exp_month"]
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card['year'] = stripe_card["card"]["exp_year"]
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card['id'] = stripe_card["id"]
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cards.append(card)
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return cards
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@handle_stripe_error
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def delete_card(card_id):
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return stripe.PaymentMethod.detach(card_id)
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def sync_cards_for_user(user):
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customer_id = get_customer_id_for(user)
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cards = get_customer_cards(customer_id)
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active_cards = StripeCreditCard.objects.filter(owner=user,
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active=True)
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if len(active_cards) > 0:
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has_active_card = True
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else:
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has_active_card = False
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for card in cards:
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active = False
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if not has_active_card:
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active = True
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has_active_card = True
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StripeCreditCard.objects.get_or_create(card_id=card['id'],
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owner = user,
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defaults = {
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'last4': card['last4'],
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'brand': card['brand'],
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'expiry_date': datetime.date(card['year'],
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card['month'],
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1),
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'active': active
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}
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)
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@handle_stripe_error
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def charge_customer(user, amount, currency='CHF', card=False):
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# Amount is in CHF but stripes requires smallest possible unit.
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# https://stripe.com/docs/api/payment_intents/create#create_payment_intent-amount
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# FIXME: might need to be adjusted for other currencies
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if currency == 'CHF':
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adjusted_amount = int(amount * 100)
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else:
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return Exception("Programming error: unsupported currency")
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try:
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card = card or StripeCreditCard.objects.get(owner=user,
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active=True)
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except StripeCreditCard.DoesNotExist:
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raise ValidationError("No active credit card - cannot create payment")
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customer_id = get_customer_id_for(user)
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return stripe.PaymentIntent.create(
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amount=adjusted_amount,
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currency=currency,
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customer=customer_id,
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payment_method=card.card_id,
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off_session=True,
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confirm=True,
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)
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@handle_stripe_error
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def get_payment_intent(user, amount, currency='CHF', card=False):
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# Amount is in CHF but stripes requires smallest possible unit.
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# https://stripe.com/docs/api/payment_intents/create#create_payment_intent-amount
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# FIXME: might need to be adjusted for other currencies
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if currency == 'CHF':
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adjusted_amount = int(amount * 100)
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else:
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return Exception("Programming error: unsupported currency")
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try:
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card = card or StripeCreditCard.objects.get(owner=user,
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active=True)
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except StripeCreditCard.DoesNotExist:
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raise ValidationError("No active credit card - cannot create payment")
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customer_id = get_customer_id_for(user)
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return stripe.PaymentIntent.create(
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amount=adjusted_amount,
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currency=currency,
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customer=customer_id,
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payment_method=card.card_id,
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setup_future_usage='off_session',
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confirm=False,
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)
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@handle_stripe_error
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def get_or_create_tax_id_for_user(stripe_customer_id, vat_number,
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type="eu_vat", country=""):
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def compare_vat_numbers(vat1, vat2):
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_vat1 = vat1.replace(" ", "").replace(".", "").replace("-","")
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_vat2 = vat2.replace(" ", "").replace(".", "").replace("-","")
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return True if _vat1 == _vat2 else False
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tax_ids_list = stripe.Customer.list_tax_ids(
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stripe_customer_id,
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limit=100,
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)
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for tax_id_obj in tax_ids_list.data:
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if compare_vat_numbers(tax_id_obj.value, vat_number):
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return tax_id_obj
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else:
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logger.debug(
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"{val1} is not equal to {val2} or {con1} not same as "
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"{con2}".format(val1=tax_id_obj.value, val2=vat_number,
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con1=tax_id_obj.country.lower(),
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con2=country.lower().strip()))
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logger.debug(
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"tax id obj does not exist for {val}. Creating a new one".format(
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val=vat_number
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))
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tax_id_obj = stripe.Customer.create_tax_id(
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stripe_customer_id,
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type=type,
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value=vat_number,
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)
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return tax_id_obj
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