dynamicweb/hosting/models.py

762 lines
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Python
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import decimal
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import json
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import logging
import os
from datetime import datetime
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import pytz
from Crypto.PublicKey import RSA
from dateutil.relativedelta import relativedelta
from django.db import models
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from django.utils import timezone
from django.utils.functional import cached_property
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from datacenterlight.models import VMPricing, VMTemplate, StripePlan
from membership.models import StripeCustomer, CustomUser
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from utils.mixins import AssignPermissionsMixin
from utils.models import BillingAddress
from utils.stripe_utils import StripeUtils
logger = logging.getLogger(__name__)
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class HostingPlan(models.Model):
disk_size = models.FloatField(default=0.0)
cpu_cores = models.FloatField(default=0.0)
memory = models.FloatField(default=0.0)
def serialize(self):
return {
'id': self.id,
'cpu': self.cpu_cores,
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'memory': self.memory,
'disk_size': self.disk_size,
'price': self.price(),
}
@classmethod
def get_serialized_configs(cls):
return [cfg.serialize()
for cfg in cls.objects.all()]
def price(self):
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price = self.disk_size * 0.6
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price += self.cpu_cores * 5
price += self.memory * 2
return price
class OrderDetail(AssignPermissionsMixin, models.Model):
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vm_template = models.ForeignKey(
VMTemplate, blank=True, null=True, default=None,
on_delete=models.SET_NULL
)
cores = models.IntegerField(default=0)
memory = models.IntegerField(default=0)
hdd_size = models.IntegerField(default=0)
ssd_size = models.IntegerField(default=0)
def __str__(self):
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return "Not available" if self.vm_template is None else (
"%s - %s, %s cores, %s GB RAM, %s GB SSD" % (
self.vm_template.name, self.vm_template.vm_type, self.cores,
self.memory, self.ssd_size
)
)
class GenericProduct(AssignPermissionsMixin, models.Model):
permissions = ('view_genericproduct',)
product_name = models.CharField(max_length=128, default="")
product_slug = models.SlugField(
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unique=True,
help_text=(
'An mandatory unique slug for the product'
)
)
product_description = models.CharField(max_length=500, default="")
created_at = models.DateTimeField(auto_now_add=True)
product_price = models.DecimalField(max_digits=6, decimal_places=2)
product_vat = models.DecimalField(max_digits=6, decimal_places=4, default=0)
product_is_subscription = models.BooleanField(default=True)
product_subscription_interval = models.CharField(
max_length=10, default="month",
help_text="Choose between `year` and `month`")
exclude_vat_calculations = models.BooleanField(
default=False,
help_text="When checked VAT calculations are excluded for this product"
)
def __str__(self):
return self.product_name
def get_actual_price(self, vat_rate=None):
if self.exclude_vat_calculations:
return round(float(self.product_price), 2)
else:
VAT = vat_rate if vat_rate is not None else self.product_vat
return round(
float(self.product_price) + float(self.product_price) * float(VAT), 2
)
class HostingOrder(AssignPermissionsMixin, models.Model):
ORDER_APPROVED_STATUS = 'Approved'
ORDER_DECLINED_STATUS = 'Declined'
vm_id = models.IntegerField(default=0)
customer = models.ForeignKey(StripeCustomer)
billing_address = models.ForeignKey(BillingAddress)
created_at = models.DateTimeField(auto_now_add=True)
approved = models.BooleanField(default=False)
last4 = models.CharField(max_length=4)
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cc_brand = models.CharField(max_length=128)
stripe_charge_id = models.CharField(max_length=100, null=True)
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price = models.FloatField()
subscription_id = models.CharField(max_length=100, null=True)
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vm_pricing = models.ForeignKey(VMPricing)
order_detail = models.ForeignKey(
OrderDetail, null=True, blank=True, default=None,
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on_delete=models.SET_NULL
)
generic_product = models.ForeignKey(
GenericProduct, null=True, blank=True, default=None,
on_delete=models.SET_NULL
)
generic_payment_description = models.CharField(
max_length=500, null=True
)
permissions = ('view_hostingorder',)
class Meta:
permissions = (
('view_hostingorder', 'View Hosting Order'),
)
def __str__(self):
hosting_order_str = ("Order Nr: #{} - VM_ID: {} - {} - {} - "
"Specs: {} - Price: {}").format(
self.id, self.vm_id, self.customer.user.email, self.created_at,
self.order_detail, self.price
)
if self.generic_product_id is not None:
hosting_order_str += " - Generic Payment"
if self.stripe_charge_id is not None:
hosting_order_str += " - One time charge"
else:
hosting_order_str += " - Recurring"
return hosting_order_str
@cached_property
def status(self):
return self.ORDER_APPROVED_STATUS if self.approved else self.ORDER_DECLINED_STATUS
@classmethod
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def create(cls, price=None, vm_id=0, customer=None,
billing_address=None, vm_pricing=None):
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instance = cls.objects.create(
price=price,
vm_id=vm_id,
customer=customer,
billing_address=billing_address,
vm_pricing=vm_pricing
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)
instance.assign_permissions(customer.user)
return instance
def set_approved(self):
self.approved = True
self.save()
def set_stripe_charge(self, stripe_charge):
self.stripe_charge_id = stripe_charge.id
self.last4 = stripe_charge.source.last4
self.cc_brand = stripe_charge.source.brand
self.save()
def set_subscription_id(self, subscription_id, cc_details):
"""
When creating a Stripe subscription, we have subscription id.
We store this in the subscription_id field.
This method sets the subscription id
and the last4 and credit card brands used for this order.
:param subscription_id: Stripe's subscription id
:param cc_details: A dict containing card details
{last4, brand}
:return:
"""
self.subscription_id = subscription_id
self.last4 = cc_details.get('last4')
self.cc_brand = cc_details.get('brand')
self.save()
def get_cc_data(self):
return {
'last4': self.last4,
'cc_brand': self.cc_brand,
} if self.last4 and self.cc_brand else None
class UserHostingKey(models.Model):
user = models.ForeignKey(CustomUser, blank=True, null=True)
public_key = models.TextField()
private_key = models.FileField(upload_to='private_keys', blank=True)
created_at = models.DateTimeField(auto_now_add=True)
name = models.CharField(max_length=100)
@staticmethod
def generate_RSA(bits=2048):
'''
Generate an RSA keypair with an exponent of 65537 in PEM format
param: bits The key length in bits
Return private key and public key
'''
new_key = RSA.generate(2048, os.urandom)
public_key = new_key.publickey().exportKey("OpenSSH")
private_key = new_key.exportKey("PEM")
return private_key, public_key
@classmethod
def generate_keys(cls):
private_key, public_key = cls.generate_RSA()
# self.public_key = public_key
# self.save(update_fields=['public_key'])
return private_key, public_key
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def delete(self,*args,**kwargs):
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if bool(self.private_key) and os.path.isfile(self.private_key.path):
logger.debug("Removing private key {}".format(self.private_key.path))
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os.remove(self.private_key.path)
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else:
logger.debug("No private_key to remove")
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super(UserHostingKey, self).delete(*args,**kwargs)
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class HostingBill(AssignPermissionsMixin, models.Model):
customer = models.ForeignKey(StripeCustomer)
billing_address = models.ForeignKey(BillingAddress)
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total_price = models.FloatField(default=0.0)
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permissions = ('view_hostingbill',)
class Meta:
permissions = (
('view_hostingbill', 'View Hosting Bill'),
)
def __str__(self):
return "%s" % (self.customer.user.email)
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@classmethod
def create(cls, customer=None, billing_address=None):
instance = cls.objects.create(customer=customer,
billing_address=billing_address)
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return instance
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class MonthlyHostingBill(AssignPermissionsMixin, models.Model):
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"""
Corresponds to Invoice object of Stripe
"""
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customer = models.ForeignKey(StripeCustomer)
order = models.ForeignKey(HostingOrder)
created = models.DateTimeField(help_text="When the invoice was created")
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receipt_number = models.CharField(
help_text="The receipt number that is generated on Stripe",
max_length=100
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)
invoice_number = models.CharField(
help_text="The invoice number that is generated on Stripe",
max_length=100
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)
paid_at = models.DateTimeField(help_text="Date on which the bill was paid")
period_start = models.DateTimeField()
period_end = models.DateTimeField()
billing_reason = models.CharField(max_length=25)
discount = models.PositiveIntegerField()
total = models.IntegerField()
lines_data_count = models.IntegerField()
invoice_id = models.CharField(unique=True, max_length=100)
lines_meta_data_csv = models.TextField(default="")
subscription_ids_csv = models.TextField(default="")
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permissions = ('view_monthlyhostingbill',)
class Meta:
permissions = (
('view_monthlyhostingbill', 'View Monthly Hosting'),
)
@classmethod
def create(cls, args):
# Try to infer the HostingOrder from subscription id or VM_ID
if len(args['subscription_ids_csv']) > 0:
sub_ids = [sub_id.strip() for sub_id in args['subscription_ids_csv'].split(",")]
set_sub_ids = set(sub_ids)
if len(set_sub_ids) == 1:
# the multiple line items belong to the same subscription
sub_id = set_sub_ids.pop()
try:
args['order'] = HostingOrder.objects.get(
subscription_id=sub_id
)
except HostingOrder.DoesNotExist as dne:
logger.error("Hosting order for {} doesn't exist".format(
sub_id
))
args['order'] = None
else:
logger.debug(
"More than one subscriptions"
"for MonthlyHostingBill {}".format(args['invoice_id'])
)
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logger.debug("SUB_IDS={}".format(','.join(sub_ids)))
logger.debug("Not importing invoices")
return None
elif len(args['lines_meta_data_csv']) > 0:
vm_ids = [vm_id.strip() for vm_id in args['lines_meta_data_csv'].split(",")]
if len(vm_ids) == 1:
args['order'] = HostingOrder.objects.get(vm_id=vm_ids[0])
else:
logger.debug(
"More than one VM_ID"
"for MonthlyHostingBill {}".format(args['invoice_id'])
)
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logger.debug("VM_IDS={}".format(','.join(vm_ids)))
logger.debug("Not importing invoices")
return None
else:
logger.debug("Neither subscription id nor vm_id available")
logger.debug("Can't import invoice")
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return None
if args['order'] is None:
logger.error(
"Order is None for {}".format(args['invoice_id']))
return None
instance = cls.objects.create(
created=datetime.utcfromtimestamp(
args['created']).replace(tzinfo=pytz.utc),
receipt_number=(
args['receipt_number']
if args['receipt_number'] is not None else ''
),
invoice_number=(
args['invoice_number']
if args['invoice_number'] is not None else ''
),
paid_at=datetime.utcfromtimestamp(
args['paid_at']).replace(tzinfo=pytz.utc),
period_start=datetime.utcfromtimestamp(
args['period_start']).replace(tzinfo=pytz.utc),
period_end=datetime.utcfromtimestamp(
args['period_end']).replace(tzinfo=pytz.utc),
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billing_reason=(
args['billing_reason']
if args['billing_reason'] is not None else ''
),
discount=args['discount'],
total=args['total'],
lines_data_count=args['lines_data_count'],
invoice_id=args['invoice_id'],
lines_meta_data_csv=args['lines_meta_data_csv'],
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customer=args['customer'],
order=args['order'],
subscription_ids_csv=args['subscription_ids_csv'],
)
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if 'line_items' in args:
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line_items = args['line_items']
for item in line_items:
stripe_plan = None
if item.type == "subscription" or item.type == "invoiceitem":
# Check stripe plan and prepare it for linking to bill item
stripe_plan_id = item.plan.id
try:
stripe_plan = StripePlan.objects.get(
stripe_plan_id=stripe_plan_id
)
except StripePlan.DoesNotExist as dne:
logger.error(
"StripePlan %s doesn't exist" % stripe_plan_id
)
if stripe_plan_id is not None:
# Create Stripe Plan because we don't have it
stripe_plan = StripePlan.objects.create(
stripe_plan_id=stripe_plan_id,
stripe_plan_name=item.plan.name,
amount=item.plan.amount,
interval=item.plan.interval
)
logger.debug("Creatd StripePlan " + stripe_plan_id)
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line_item_instance = HostingBillLineItem.objects.create(
monthly_hosting_bill=instance,
amount=item.amount,
# description seems to be set to null in the Stripe
# response for an invoice
description="" if item.description is None else item.description,
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discountable=item.discountable,
metadata=json.dumps(item.metadata),
period_start=datetime.utcfromtimestamp(item.period.start).replace(tzinfo=pytz.utc), period_end=datetime.utcfromtimestamp(item.period.end).replace(tzinfo=pytz.utc),
proration=item.proration,
quantity=item.quantity,
# Strange that line item does not have unit_amount but api
# states that it is present
# https://stripe.com/docs/api/invoiceitems/object#invoiceitem_object-unit_amount
# So, for the time being I set the unit_amount to 0 if not
# found in the line item
unit_amount=item.unit_amount if hasattr(item, "unit_amount") else 0,
stripe_plan=stripe_plan
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)
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line_item_instance.assign_permissions(instance.customer.user)
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instance.assign_permissions(instance.customer.user)
return instance
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def total_in_chf(self):
"""
Returns amount in chf. The total amount in this model is in cents.
Hence we multiply it by 0.01 to obtain the result
:return:
"""
return self.total * 0.01
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def discount_in_chf(self):
"""
Returns discount in chf.
:return:
"""
return self.discount * 0.01
def get_vm_id(self):
"""
Returns the VM_ID metadata if set in this MHB else returns None
:return:
"""
return_value = None
if len(self.lines_meta_data_csv) > 0:
vm_ids = [vm_id.strip() for vm_id in
self.lines_meta_data_csv.split(",")]
unique_vm_ids=set(vm_ids)
unique_vm_ids.discard("")
if len(unique_vm_ids) == 1:
vm_id = unique_vm_ids.pop()
logger.debug("Getting invoice for {}".format(vm_id))
return vm_id
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else:
logger.debug(
"More than one VM_ID"
"for MonthlyHostingBill {}".format(self.invoice_id)
)
logger.debug("VM_IDS={}".format(unique_vm_ids))
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return return_value
def get_period_start(self):
"""
Return the period start of the invoice for the line items
:return:
"""
items = HostingBillLineItem.objects.filter(monthly_hosting_bill=self)
if len(items) > 0:
return items[0].period_start
else:
return self.period_start
def get_period_end(self):
"""
Return the period end of the invoice for the line items
:return:
"""
items = HostingBillLineItem.objects.filter(monthly_hosting_bill=self)
if len(items) > 0:
return items[0].period_end
else:
return self.period_end
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class HostingBillLineItem(AssignPermissionsMixin, models.Model):
"""
Corresponds to InvoiceItem object of Stripe
"""
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monthly_hosting_bill = models.ForeignKey(MonthlyHostingBill,
on_delete=models.CASCADE)
stripe_plan = models.ForeignKey(StripePlan, null=True,
on_delete=models.CASCADE)
amount = models.IntegerField()
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description = models.CharField(max_length=255)
discountable = models.BooleanField()
metadata = models.CharField(max_length=128)
period_start = models.DateTimeField()
period_end = models.DateTimeField()
proration = models.BooleanField()
quantity = models.PositiveIntegerField()
unit_amount = models.PositiveIntegerField()
permissions = ('view_hostingbilllineitem',)
class Meta:
permissions = (
('view_hostingbilllineitem', 'View Monthly Hosting Bill Line Item'),
)
def amount_in_chf(self):
"""
Returns amount in chf. The amount in this model is in cents (as in
Stripe). Hence we multiply it by 0.01 to obtain the result
:return:
"""
return self.amount * 0.01
def unit_amount_in_chf(self):
"""
Returns unit amount in chf. If its 0, we obtain it from amount and
quantity.
:return:
"""
if self.unit_amount == 0:
return round((self.amount / self.quantity) * 0.01, 2)
else:
return self.unit_amount * 0.01
def get_item_detail_str(self):
"""
Returns line item html string representation
:return:
"""
item_detail = ""
# metadata is a dict; a dict with nothing has two chars at least {}
if self.metadata is not None and len(self.metadata) > 2:
try:
vm_dict = json.loads(self.metadata)
item_detail = "VM ID: {}<br/>".format(vm_dict["VM_ID"])
except ValueError as ve:
logger.error(
"Could not parse VM in metadata {}. Detail {}".format(
self.metadata, str(ve)
)
)
vm_conf = StripeUtils.get_vm_config_from_stripe_id(
self.stripe_plan.stripe_plan_id
)
if vm_conf is not None:
item_detail += ("<b>Cores</b>: {}<br/><b>RAM</b>: {} GB<br/>"
"<b>SSD</b>: {} GB<br/>").format(
vm_conf['cores'], int(float(vm_conf['ram'])),
vm_conf['ssd']
)
return item_detail
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class VMDetail(models.Model):
user = models.ForeignKey(CustomUser)
vm_id = models.IntegerField(default=0)
disk_size = models.FloatField(default=0.0)
cores = models.FloatField(default=0.0)
memory = models.FloatField(default=0.0)
configuration = models.CharField(default='', max_length=128)
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ipv4 = models.TextField(default='')
ipv6 = models.TextField(default='')
created_at = models.DateTimeField(auto_now_add=True)
terminated_at = models.DateTimeField(null=True)
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def end_date(self):
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end_date = self.terminated_at if self.terminated_at else timezone.now()
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months = relativedelta(end_date, self.created_at).months or 1
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end_date = self.created_at + relativedelta(months=months, days=-1)
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return end_date
class UserCardDetail(AssignPermissionsMixin, models.Model):
permissions = ('view_usercarddetail',)
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stripe_customer = models.ForeignKey(StripeCustomer)
last4 = models.CharField(max_length=4)
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brand = models.CharField(max_length=128)
card_id = models.CharField(max_length=100, blank=True, default='')
fingerprint = models.CharField(max_length=100)
exp_month = models.IntegerField(null=False)
exp_year = models.IntegerField(null=False)
preferred = models.BooleanField(default=False)
class Meta:
permissions = (
('view_usercarddetail', 'View User Card'),
)
@classmethod
def create(cls, stripe_customer=None, last4=None, brand=None,
fingerprint=None, exp_month=None, exp_year=None, card_id=None,
preferred=False):
instance = cls.objects.create(
stripe_customer=stripe_customer, last4=last4, brand=brand,
fingerprint=fingerprint, exp_month=exp_month, exp_year=exp_year,
card_id=card_id, preferred=preferred
)
instance.assign_permissions(stripe_customer.user)
return instance
@classmethod
def get_all_cards_list(cls, stripe_customer):
"""
Get all the cards of the given customer as a list
:param stripe_customer: The StripeCustomer object
:return: A list of all cards; an empty list if the customer object is
None
"""
cards_list = []
if stripe_customer is None:
return cards_list
user_card_details = UserCardDetail.objects.filter(
stripe_customer_id=stripe_customer.id
).order_by('-preferred', 'id')
for card in user_card_details:
cards_list.append({
'last4': card.last4, 'brand': card.brand, 'id': card.id,
'exp_year': card.exp_year,
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'exp_month': '{:02d}'.format(card.exp_month),
'preferred': card.preferred
})
return cards_list
@classmethod
def get_or_create_user_card_detail(cls, stripe_customer, card_details):
"""
A method that checks if a UserCardDetail object exists already
based upon the given card_details and creates it for the given
customer if it does not exist. It returns the UserCardDetail object
matching the given card_details if it exists.
:param stripe_customer: The given StripeCustomer object to whom the
card object should belong to
:param card_details: A dictionary identifying a given card
:return: UserCardDetail object
"""
try:
if ('fingerprint' in card_details and 'exp_month' in card_details
and 'exp_year' in card_details):
card_detail = UserCardDetail.objects.get(
stripe_customer=stripe_customer,
fingerprint=card_details['fingerprint'],
exp_month=card_details['exp_month'],
exp_year=card_details['exp_year']
)
else:
raise UserCardDetail.DoesNotExist()
except UserCardDetail.DoesNotExist:
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preferred = False
if 'preferred' in card_details:
preferred = card_details['preferred']
card_detail = UserCardDetail.create(
stripe_customer=stripe_customer,
last4=card_details['last4'],
brand=card_details['brand'],
fingerprint=card_details['fingerprint'],
exp_month=card_details['exp_month'],
exp_year=card_details['exp_year'],
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card_id=card_details['card_id'],
preferred=preferred
)
return card_detail
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@staticmethod
def set_default_card(stripe_api_cus_id, stripe_source_id):
"""
Sets the given stripe source as the default source for the given
Stripe customer
:param stripe_api_cus_id: Stripe customer id
:param stripe_source_id: The Stripe source id
:return:
"""
stripe_utils = StripeUtils()
cus_response = stripe_utils.get_customer(stripe_api_cus_id)
cu = cus_response['response_object']
cu.default_source = stripe_source_id
cu.save()
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UserCardDetail.save_default_card_local(
stripe_api_cus_id, stripe_source_id
)
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@staticmethod
def set_default_card_from_stripe(stripe_api_cus_id):
stripe_utils = StripeUtils()
cus_response = stripe_utils.get_customer(stripe_api_cus_id)
cu = cus_response['response_object']
default_source = cu.default_source
if default_source is not None:
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UserCardDetail.save_default_card_local(
stripe_api_cus_id, default_source
)
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@staticmethod
def save_default_card_local(stripe_api_cus_id, card_id):
stripe_cust = StripeCustomer.objects.get(stripe_id=stripe_api_cus_id)
user_card_detail = UserCardDetail.objects.get(
stripe_customer=stripe_cust, card_id=card_id
)
for card in stripe_cust.usercarddetail_set.all():
card.preferred = False
card.save()
user_card_detail.preferred = True
user_card_detail.save()
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@staticmethod
def get_user_card_details(stripe_customer, card_details):
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"""
A utility function to check whether a StripeCustomer is already
associated with the card having given details
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:param stripe_customer:
:param card_details:
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:return: The UserCardDetails object if it exists, None otherwise
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"""
try:
ucd = UserCardDetail.objects.get(
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stripe_customer=stripe_customer,
fingerprint=card_details['fingerprint'],
exp_month=card_details['exp_month'],
exp_year=card_details['exp_year']
)
return ucd
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except UserCardDetail.DoesNotExist:
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return None
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class VATRates(AssignPermissionsMixin, models.Model):
start_date = models.DateField(blank=True, null=True)
stop_date = models.DateField(blank=True, null=True)
territory_codes = models.TextField(blank=True, default='')
currency_code = models.CharField(max_length=10)
rate = models.FloatField()
rate_type = models.TextField(blank=True, default='')
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description = models.TextField(blank=True, default='')
class StripeTaxRate(AssignPermissionsMixin, models.Model):
tax_rate_id = models.CharField(max_length=100, unique=True)
jurisdiction = models.CharField(max_length=10)
inclusive = models.BooleanField(default=False)
display_name = models.CharField(max_length=100)
percentage = models.FloatField(default=0)
description = models.CharField(max_length=100)
class IncompleteSubscriptions(AssignPermissionsMixin, models.Model):
created_at = models.DateTimeField(auto_now_add=True)
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completed_at = models.DateTimeField(null=True)
subscription_id = models.CharField(max_length=100)
subscription_status = models.CharField(max_length=30)
name = models.CharField(max_length=50)
email = models.EmailField()
request = models.TextField()
stripe_api_cus_id = models.CharField(max_length=30)
card_details_response = models.TextField()
stripe_subscription_obj = models.TextField()
stripe_onetime_charge = models.TextField()
gp_details = models.TextField()
specs = models.TextField()
vm_template_id = models.PositiveIntegerField(default=0)
template = models.TextField()
billing_address_data = models.TextField()