134 lines
4.3 KiB
Python
134 lines
4.3 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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import uncloud_pay.models
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import uncloud.secrets
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# Static stripe configuration used below.
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CURRENCY = 'chf'
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stripe.api_key = uncloud.secrets.STRIPE_KEY
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# Helper (decorator) used to catch errors raised by stripe logic.
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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."
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try:
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response_object = f(*args, **kwargs)
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response = {
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'response_object': response_object,
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'error': None
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}
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return response
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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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err = body['error']
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response.update({'error': err['message']})
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logging.error(str(e))
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return response
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except stripe.error.RateLimitError:
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response.update(
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{'error': "Too many requests made to the API too quickly"})
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return response
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except stripe.error.InvalidRequestError as e:
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logging.error(str(e))
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response.update({'error': "Invalid parameters"})
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return response
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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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response.update({'error': common_message})
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return response
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except stripe.error.APIConnectionError as e:
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logging.error(str(e))
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response.update({'error': common_message})
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return response
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except stripe.error.StripeError as e:
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# maybe send email
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logging.error(str(e))
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response.update({'error': common_message})
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return response
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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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response.update({'error': common_message})
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return response
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return handle_problems
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# Convenience CC container, also used for serialization.
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class CreditCard():
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number = None
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exp_year = None
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exp_month = None
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cvc = None
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def __init__(self, number, exp_month, exp_year, cvc):
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self.number=number
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self.exp_year = exp_year
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self.exp_month = exp_month
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self.cvc = cvc
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# Actual Stripe logic.
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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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customer_request = create_customer(user.username, user.email)
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if customer_request['error'] == None:
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mapping = uncloud_pay.models.StripeCustomer.objects.create(
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owner=user,
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stripe_id=customer_request['response_object']['id']
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)
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return mapping.stripe_id
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else:
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return None
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@handle_stripe_error
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def create_card(customer_id, credit_card):
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return stripe.Customer.create_source(
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customer_id,
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card={
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'number': credit_card.number,
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'exp_month': credit_card.exp_month,
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'exp_year': credit_card.exp_year,
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'cvc': credit_card.cvc
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})
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@handle_stripe_error
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def get_card(customer_id, card_id):
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return stripe.Customer.retrieve_source(customer_id, card_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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# See https://stripe.com/docs/api/charges/create
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adjusted_amount = int(amount * 100)
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return stripe.Charge.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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source=card_id)
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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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