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327 lines
11 KiB
Python
327 lines
11 KiB
Python
# -*- coding:utf-8 -*-
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#
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# Copyright 2023 © AE UTBM
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# ae@utbm.fr / ae.info@utbm.fr
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# All contributors are listed in the CONTRIBUTORS file.
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#
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# This file is part of the website of the UTBM Student Association (AE UTBM),
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# https://ae.utbm.fr.
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#
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# You can find the whole source code at https://github.com/ae-utbm/sith3
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#
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# LICENSED UNDER THE GNU GENERAL PUBLIC LICENSE VERSION 3 (GPLv3)
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# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE
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# OR WITHIN THE LOCAL FILE "LICENSE"
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#
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# PREVIOUSLY LICENSED UNDER THE MIT LICENSE,
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# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE.old
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# OR WITHIN THE LOCAL FILE "LICENSE.old"
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#
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import hmac
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import typing
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from datetime import datetime
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from typing import List
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from dict2xml import dict2xml
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from django.conf import settings
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from django.db import DataError, models
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from django.db.models import F, Sum
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from django.utils.functional import cached_property
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from django.utils.translation import gettext_lazy as _
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from accounting.models import CurrencyField
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from core.models import User
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from counter.models import BillingInfo, Counter, Customer, Product, Refilling, Selling
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def get_eboutic_products(user: User) -> List[Product]:
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products = (
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Counter.objects.get(type="EBOUTIC")
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.products.filter(product_type__isnull=False)
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.filter(archived=False)
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.filter(limit_age__lte=user.age)
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.annotate(priority=F("product_type__priority"))
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.annotate(category=F("product_type__name"))
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.annotate(category_comment=F("product_type__comment"))
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)
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return [p for p in products if p.can_be_sold_to(user)]
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class Basket(models.Model):
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"""
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Basket is built when the user connects to an eboutic page
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"""
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user = models.ForeignKey(
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User,
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related_name="baskets",
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verbose_name=_("user"),
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blank=False,
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on_delete=models.CASCADE,
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)
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date = models.DateTimeField(_("date"), auto_now=True)
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def add_product(self, p: Product, q: int = 1):
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"""
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Given p an object of the Product model and q an integer,
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add q items corresponding to this Product from the basket.
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If this function is called with a product not in the basket, no error will be raised
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"""
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item = self.items.filter(product_id=p.id).first()
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if item is None:
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BasketItem(
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basket=self,
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product_id=p.id,
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product_name=p.name,
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type_id=p.product_type.id,
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quantity=q,
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product_unit_price=p.selling_price,
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).save()
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else:
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item.quantity += q
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item.save()
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def del_product(self, p: Product, q: int = 1):
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"""
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Given p an object of the Product model and q an integer,
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remove q items corresponding to this Product from the basket.
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If this function is called with a product not in the basket, no error will be raised
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"""
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try:
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item = self.items.get(product_id=p.id)
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except BasketItem.DoesNotExist:
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return
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item.quantity -= q
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if item.quantity <= 0:
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item.delete()
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else:
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item.save()
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def clear(self) -> None:
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"""
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Remove all items from this basket without deleting the basket
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"""
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self.items.all().delete()
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@cached_property
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def contains_refilling_item(self) -> bool:
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return self.items.filter(
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type_id=settings.SITH_COUNTER_PRODUCTTYPE_REFILLING
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).exists()
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def get_total(self) -> float:
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total = self.items.aggregate(
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total=Sum(F("quantity") * F("product_unit_price"))
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)["total"]
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return float(total) if total is not None else 0
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@classmethod
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def from_session(cls, session) -> typing.Union["Basket", None]:
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"""
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Given an HttpRequest django object, return the basket used in the current session
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if it exists else None
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"""
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if "basket_id" in session:
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try:
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return cls.objects.get(id=session["basket_id"])
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except cls.DoesNotExist:
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return None
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return None
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def generate_sales(self, counter, seller: User, payment_method: str):
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"""
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Generate a list of sold items corresponding to the items
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of this basket WITHOUT saving them NOR deleting the basket
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Example:
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::
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counter = Counter.objects.get(name="Eboutic")
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sales = basket.generate_sales(counter, "SITH_ACCOUNT")
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# here the basket is in the same state as before the method call
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with transaction.atomic():
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for sale in sales:
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sale.save()
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basket.delete()
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# all the basket items are deleted by the on_delete=CASCADE relation
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# thus only the sales remain
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"""
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# I must proceed with two distinct requests instead of
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# only one with a join because the AbstractBaseItem model has been
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# poorly designed. If you refactor the model, please refactor this too.
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items = self.items.order_by("product_id")
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ids = [item.product_id for item in items]
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products = Product.objects.filter(id__in=ids).order_by("id")
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# items and products are sorted in the same order
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sales = []
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for item, product in zip(items, products):
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sales.append(
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Selling(
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label=product.name,
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counter=counter,
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club=product.club,
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product=product,
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seller=seller,
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customer=self.user.customer,
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unit_price=item.product_unit_price,
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quantity=item.quantity,
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payment_method=payment_method,
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)
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)
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return sales
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def get_e_transaction_data(self):
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user = self.user
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if not hasattr(user, "customer"):
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raise Customer.DoesNotExist
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customer = user.customer
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if not hasattr(user.customer, "billing_infos"):
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raise BillingInfo.DoesNotExist
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data = [
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("PBX_SITE", settings.SITH_EBOUTIC_PBX_SITE),
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("PBX_RANG", settings.SITH_EBOUTIC_PBX_RANG),
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("PBX_IDENTIFIANT", settings.SITH_EBOUTIC_PBX_IDENTIFIANT),
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("PBX_TOTAL", str(int(self.get_total() * 100))),
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("PBX_DEVISE", "978"), # This is Euro
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("PBX_CMD", str(self.id)),
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("PBX_PORTEUR", user.email),
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("PBX_RETOUR", "Amount:M;BasketID:R;Auto:A;Error:E;Sig:K"),
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("PBX_HASH", "SHA512"),
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("PBX_TYPEPAIEMENT", "CARTE"),
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("PBX_TYPECARTE", "CB"),
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("PBX_TIME", datetime.now().replace(microsecond=0).isoformat("T")),
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]
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cart = {
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"shoppingcart": {"total": {"totalQuantity": min(self.items.count(), 99)}}
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}
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cart = '<?xml version="1.0" encoding="UTF-8" ?>' + dict2xml(
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cart, newlines=False
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)
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data += [
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("PBX_SHOPPINGCART", cart),
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("PBX_BILLING", customer.billing_infos.to_3dsv2_xml()),
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]
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pbx_hmac = hmac.new(
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settings.SITH_EBOUTIC_HMAC_KEY,
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bytes("&".join("=".join(d) for d in data), "utf-8"),
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"sha512",
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)
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data.append(("PBX_HMAC", pbx_hmac.hexdigest().upper()))
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return data
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def __str__(self):
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return "%s's basket (%d items)" % (self.user, self.items.all().count())
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class Invoice(models.Model):
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"""
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Invoices are generated once the payment has been validated
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"""
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user = models.ForeignKey(
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User,
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related_name="invoices",
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verbose_name=_("user"),
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blank=False,
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on_delete=models.CASCADE,
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)
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date = models.DateTimeField(_("date"), auto_now=True)
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validated = models.BooleanField(_("validated"), default=False)
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def get_total(self) -> float:
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total = self.items.aggregate(
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total=Sum(F("quantity") * F("product_unit_price"))
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)["total"]
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return float(total) if total is not None else 0
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def validate(self):
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if self.validated:
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raise DataError(_("Invoice already validated"))
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customer, created = Customer.get_or_create(user=self.user)
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eboutic = Counter.objects.filter(type="EBOUTIC").first()
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for i in self.items.all():
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if i.type_id == settings.SITH_COUNTER_PRODUCTTYPE_REFILLING:
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new = Refilling(
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counter=eboutic,
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customer=customer,
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operator=self.user,
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amount=i.product_unit_price * i.quantity,
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payment_method="CARD",
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bank="OTHER",
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date=self.date,
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)
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new.save()
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else:
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product = Product.objects.filter(id=i.product_id).first()
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new = Selling(
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label=i.product_name,
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counter=eboutic,
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club=product.club,
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product=product,
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seller=self.user,
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customer=customer,
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unit_price=i.product_unit_price,
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quantity=i.quantity,
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payment_method="CARD",
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is_validated=True,
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date=self.date,
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)
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new.save()
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self.validated = True
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self.save()
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def __str__(self):
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return "%s - %s - %s" % (self.user, self.get_total(), self.date)
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class AbstractBaseItem(models.Model):
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product_id = models.IntegerField(_("product id"))
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product_name = models.CharField(_("product name"), max_length=255)
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type_id = models.IntegerField(_("product type id"))
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product_unit_price = CurrencyField(_("unit price"))
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quantity = models.PositiveIntegerField(_("quantity"))
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class Meta:
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abstract = True
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def __str__(self):
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return "Item: %s (%s) x%d" % (
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self.product_name,
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self.product_unit_price,
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self.quantity,
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)
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class BasketItem(AbstractBaseItem):
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basket = models.ForeignKey(
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Basket, related_name="items", verbose_name=_("basket"), on_delete=models.CASCADE
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)
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@classmethod
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def from_product(cls, product: Product, quantity: int):
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"""
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Create a BasketItem with the same characteristics as the
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product passed in parameters, with the specified quantity
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WARNING : the basket field is not filled, so you must set
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it yourself before saving the model
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"""
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return cls(
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product_id=product.id,
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product_name=product.name,
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type_id=product.product_type.id,
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quantity=quantity,
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product_unit_price=product.selling_price,
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)
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class InvoiceItem(AbstractBaseItem):
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invoice = models.ForeignKey(
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Invoice,
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related_name="items",
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verbose_name=_("invoice"),
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on_delete=models.CASCADE,
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)
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