bornhack-website/shop/models.py

261 lines
7 KiB
Python

from django.conf import settings
from django.db import models
from django.db.models.aggregates import Sum
from django.contrib.postgres.fields import DateTimeRangeField, JSONField
from django.utils.text import slugify
from django.utils.translation import ugettext_lazy as _
from django.utils import timezone
from django.core.urlresolvers import reverse_lazy
from bornhack.utils import CreatedUpdatedModel, UUIDModel
from .managers import ProductQuerySet
import hashlib
import io
import base64
import qrcode
class Order(CreatedUpdatedModel):
class Meta:
unique_together = ('user', 'open')
products = models.ManyToManyField(
'shop.Product',
through='shop.OrderProductRelation'
)
user = models.ForeignKey(
'auth.User',
verbose_name=_('User'),
help_text=_('The user this order belongs to.'),
related_name='orders',
)
paid = models.BooleanField(
verbose_name=_('Paid?'),
help_text=_('Whether this order has been paid.'),
default=False,
)
open = models.NullBooleanField(
verbose_name=_('Open?'),
help_text=_('Whether this order is open or not. "None" means closed.'),
default=True,
)
camp = models.ForeignKey(
'camps.Camp',
verbose_name=_('Camp'),
help_text=_('The camp this order is for.'),
)
CREDIT_CARD = 'credit_card'
BLOCKCHAIN = 'blockchain'
BANK_TRANSFER = 'bank_transfer'
PAYMENT_METHODS = [
CREDIT_CARD,
BLOCKCHAIN,
BANK_TRANSFER,
]
PAYMENT_METHOD_CHOICES = [
(CREDIT_CARD, 'Credit card'),
(BLOCKCHAIN, 'Blockchain'),
(BANK_TRANSFER, 'Bank transfer'),
]
payment_method = models.CharField(
max_length=50,
choices=PAYMENT_METHOD_CHOICES,
default=BLOCKCHAIN
)
def get_number_of_items(self):
return self.products.aggregate(
sum=Sum('orderproductrelation__quantity')
)['sum']
@property
def vat(self):
return self.total*0.2
@property
def total(self):
return self.products.aggregate(
sum=Sum(
models.F('orderproductrelation__product__price') *
models.F('orderproductrelation__quantity'),
output_field=models.IntegerField()
)
)['sum']
def get_epay_accept_url(self, request):
return 'https://' + request.get_host() + str(reverse_lazy('shop:epay_thanks', kwargs={'pk': self.pk}))
def get_epay_cancel_url(self, request):
return 'https://' + request.get_host() + str(reverse_lazy('shop:order_detail', kwargs={'pk': self.pk}))
@property
def description(self):
return "BornHack 2016 order #%s" % self.pk
def get_absolute_url(self):
return str(reverse_lazy('shop:order_detail', kwargs={'pk': self.pk}))
class ProductCategory(CreatedUpdatedModel, UUIDModel):
class Meta:
verbose_name = 'Product category'
verbose_name_plural = 'Product categories'
name = models.CharField(max_length=150)
slug = models.SlugField()
public = models.BooleanField(default=True)
def __str__(self):
return self.name
def save(self, **kwargs):
self.slug = slugify(self.name)
super(ProductCategory, self).save(**kwargs)
class Product(CreatedUpdatedModel, UUIDModel):
class Meta:
verbose_name = 'Product'
verbose_name_plural = 'Products'
ordering = ['available_in']
category = models.ForeignKey(
'shop.ProductCategory',
related_name='products'
)
name = models.CharField(max_length=150)
slug = models.SlugField()
price = models.IntegerField(
help_text=_('Price of the product (in DKK).')
)
description = models.TextField()
available_in = DateTimeRangeField(
help_text=_(
'Which period is this product available for purchase? | '
'(Format: YYYY-MM-DD HH:MM) | Only one of start/end is required'
)
)
objects = ProductQuerySet.as_manager()
def __str__(self):
return '{} ({} DKK)'.format(
self.name,
self.price,
)
def save(self, **kwargs):
self.slug = slugify(self.name)
super(Product, self).save(**kwargs)
def is_available(self):
now = timezone.now()
return now in self.available_in
class OrderProductRelation(CreatedUpdatedModel):
order = models.ForeignKey('shop.Order')
product = models.ForeignKey('shop.Product')
quantity = models.PositiveIntegerField()
handed_out = models.BooleanField(default=False)
@property
def total(self):
return self.product.price * self.quantity
class EpayCallback(CreatedUpdatedModel, UUIDModel):
class Meta:
verbose_name = 'Epay Callback'
verbose_name_plural = 'Epay Callbacks'
ordering = ['-created']
payload = JSONField()
md5valid = models.BooleanField(default=False)
def __str__(self):
return 'callback at %s (md5 valid: %s)' % (self.created, self.md5valid)
class EpayPayment(CreatedUpdatedModel, UUIDModel):
class Meta:
verbose_name = 'Epay Payment'
verbose_name_plural = 'Epay Payments'
order = models.OneToOneField('shop.Order')
callback = models.ForeignKey('shop.EpayCallback')
txnid = models.IntegerField()
class Invoice(CreatedUpdatedModel):
order = models.OneToOneField('shop.Order')
sent_to_customer = models.BooleanField(default=False)
def __str__(self):
return 'invoice#%s - order %s - %s - total %s DKK (sent to customer: %s)' % (
self.id,
self.order.id,
self.order.created,
self.order.total,
self.sent_to_customer,
)
class Ticket(CreatedUpdatedModel, UUIDModel):
order = models.ForeignKey('shop.Order')
product = models.ForeignKey('shop.Product')
qrcode_base64 = models.TextField(null=True, blank=True)
name = models.CharField(
max_length=100,
help_text=(
'Name of the person this ticket belongs to. '
'This can be different from the buying user.'
),
)
def __str__(self):
return 'Ticket {user} {product}'.format(
user=self.order.user,
product=self.product
)
def save(self, **kwargs):
super(Ticket, self).save(**kwargs)
self.qrcode_base64 = self.get_qr_code()
super(Ticket, self).save(**kwargs)
def get_token(self):
return hashlib.sha256(
'{ticket_id}{user_id}{secret_key}'.format(
ticket_id=self.pk,
user_id=self.order.user.pk,
secret_key=settings.SECRET_KEY,
)
).hexdigest()
def get_qr_code(self):
qr = qrcode.make(self.get_token())
file_like = io.BytesIO()
qr.save(file_like)
qrcode_base64 = base64.b64encode(file_like.getvalue())
return qrcode_base64
def get_qr_code_url(self):
return 'data:image/png;base64,{}'.format(self.qrcode_base64)