115 lines
3.8 KiB
Python
115 lines
3.8 KiB
Python
import stripe
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import stripe.error
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import logging
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from django.core.exceptions import ObjectDoesNotExist
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from django.conf import settings
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import uncloud_pay.models
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# Static stripe configuration used below.
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CURRENCY = 'chf'
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# README: We use the Payment Intent API as described on
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# https://stripe.com/docs/payments/save-and-reuse
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# For internal use only.
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stripe.api_key = settings.STRIPE_KEY
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# Helper (decorator) used to catch errors raised by stripe logic.
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# Catch errors that should not be displayed to the end user, raise again.
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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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except Exception as e:
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# 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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# Actual Stripe logic.
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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 uncloud_pay.models.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 = uncloud_pay.models.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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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 charge_customer(amount, customer_id, card_id):
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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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adjusted_amount = int(amount * 100)
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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_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 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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