from django.db import models, DataError from django.utils.translation import ugettext_lazy as _ from django.conf import settings from accounting.models import CurrencyField from counter.models import Counter, Product, Customer, Selling, Refilling from core.models import User from subscription.models import Subscription, Subscriber class Basket(models.Model): """ Basket is built when the user connects to an eboutic page """ user = models.ForeignKey(User, related_name='baskets', verbose_name=_('user'), blank=False) date = models.DateTimeField(_('date'), auto_now=True) def add_product(self, p, q = 1): item = self.items.filter(product_id=p.id).first() if item is None: BasketItem(basket=self, product_id=p.id, product_name=p.name, type_id=p.product_type.id, quantity=q, product_unit_price=p.selling_price).save() else: item.quantity += q item.save() def del_product(self, p, q = 1): item = self.items.filter(product_id=p.id).first() if item is not None: item.quantity -= q item.save() if item.quantity <= 0: item.delete() def get_total(self): total = 0 for i in self.items.all(): total += i.quantity * i.product_unit_price return total def __str__(self): return "%s's basket (%d items)" % (self.user, self.items.all().count()) class Invoice(models.Model): """ Invoices are generated once the payment has been validated """ user = models.ForeignKey(User, related_name='invoices', verbose_name=_('user'), blank=False) date = models.DateTimeField(_('date'), auto_now=True) validated = models.BooleanField(_("validated"), default=False) def __str__(self): return "%s - %s - %s" % (self.user, self.get_total(), self.date) def get_total(self): total = 0 for i in self.items.all(): total += i.quantity * i.product_unit_price return total def validate(self, *args, **kwargs): if self.validated: raise DataError(_("Invoice already validated")) from counter.models import Customer if not Customer.objects.filter(user=self.user).exists(): number = Customer.objects.count() + 1 Customer(user=self.user, account_id=Customer.generate_account_id(number), amount=0).save() eboutic = Counter.objects.filter(type="EBOUTIC").first() for i in self.items.all(): if i.type_id == settings.SITH_COUNTER_PRODUCTTYPE_REFILLING: new = Refilling( counter=eboutic, customer=self.user.customer, operator=self.user, amount=i.product_unit_price * i.quantity, payment_method="CARD", bank="OTHER", date=self.date, ) new.save() else: product = Product.objects.filter(id=i.product_id).first() new = Selling( label=i.product_name, counter=eboutic, club=product.club, product=product, seller=self.user, customer=self.user.customer, unit_price=i.product_unit_price, quantity=i.quantity, payment_method="CARD", is_validated=True, date=self.date, ) new.save() self.validated = True self.save() class AbstractBaseItem(models.Model): product_id = models.IntegerField(_('product id')) product_name = models.CharField(_('product name'), max_length=255) type_id = models.IntegerField(_('product type id')) product_unit_price = CurrencyField(_('unit price')) quantity = models.IntegerField(_('quantity')) class Meta: abstract = True def __str__(self): return "Item: %s (%s) x%d" % (self.product_name, self.product_unit_price, self.quantity) class BasketItem(AbstractBaseItem): basket = models.ForeignKey(Basket, related_name='items', verbose_name=_('basket')) class InvoiceItem(AbstractBaseItem): invoice = models.ForeignKey(Invoice, related_name='items', verbose_name=_('invoice'))