add cart app and its templates

cart/admin.py

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+from django.contrib import admin
+
+# Register your models here.

cart/apps.py

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+from django.apps import AppConfig
+
+
+class CartConfig(AppConfig):
+    name = 'cart'

cart/cart.py

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+from decimal import Decimal
+from django.conf import settings
+from django.contrib import auth
+from products.models import Product
+# from discount.models import Discount
+
+class Cart(object):
+    def __init__(self, request):
+        self.session = request.session
+        # self.discount_id = self.session.get('discount_id')
+        if request.user.is_authenticated():
+            # self.points = self.session.get('points')
+            self.points_quant = auth.get_user(request).profile.user_points
+        cart = self.session.get(settings.CART_SESSION_ID)
+        if not cart:
+            request.session['points'] = False
+            cart = self.session[settings.CART_SESSION_ID] = {}
+        self.cart = cart
+
+    def add(self, offer, price_per_itom, quantity=1, update_quantity=False):
+        offer_slug = offer.slug
+        if offer_slug not in self.cart:
+            self.cart[offer_slug] = {'quantity': 0,
+                                     'price': str(price_per_itom)}
+        if update_quantity:
+            self.cart[offer_slug]['quantity'] = int(quantity)
+        else:
+            self.cart[offer_slug]['quantity'] += int(quantity)
+        self.save()
+
+    def save(self):
+        self.session[settings.CART_SESSION_ID] = self.cart
+        self.session.modified = True
+
+    def remove(self, offer_slug):
+        # product_id = str(products.id)
+        if offer_slug in self.cart:
+            del self.cart[offer_slug]
+            self.save()
+
+    def __iter__(self):
+        offers_ids = self.cart.keys()
+        offers = Offer.objects.filter(slug__in=offers_ids)
+
+        for offer in offers:
+            self.cart[str(offer.slug)]['offer'] = offer
+
+        for item in self.cart.values():
+            item['price'] = Decimal(item['price'])
+            item['total_price'] = item['price'] * item['quantity']
+            yield item
+
+    def __len__(self):
+        return sum(item['quantity'] for item in self.cart.values())
+
+    def get_total_price(self):
+        return sum(Decimal(item['price']) * item['quantity'] for item in self.cart.values())
+
+    def get_max(self):
+        return min(self.points_quant, self.get_total_price() - 1)
+
+    def clear(self):
+        del self.session[settings.CART_SESSION_ID]
+        self.session.modified = True
+
+    # @property
+    # def discount(self):
+    #     if self.discount_id:
+    #         return Discount.objects.get(id=self.discount_id)
+    #     return None
+
+    # def get_discount(self):
+    #     if self.discount:
+    #         return (self.discount.discount / Decimal('100')) * self.get_total_price()
+    #     return Decimal('0')
+
+    # def get_total_price_after_discount(self):
+    #     return self.get_total_price() - self.get_discount()
+
+    def get_total_deduct_points(self):
+        total_price = self.get_total_price()
+        if total_price <= self.points_quant:
+            # self.points_quant = self.points_quant - total_price + 1
+            # self.save()
+            return 1
+        return total_price - self.points_quant
+

cart/context_processors.py

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+from .cart import Cart
+
+
+def cart(request):
+    return {'cart': Cart(request)}
+

cart/forms.py

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+from django import forms
+
+class CartAddProductForm(forms.Form):
+    quantity = forms.CharField(widget=forms.TextInput(attrs={
+                                                        'id': 'quantity',
+                                                        'name': 'quantity',
+                                                        'type': 'number',
+                                                        'min': '1',
+                                                        'max': '1000',
+                                                        'value': '1',
+                                                        'onchange': 'calculate()'}))
+    product_slug = forms.CharField(widget=forms.TextInput(attrs={
+                                                        'id': 'product_slug',
+                                                        'name': 'product_slug',
+                                                        'type': 'hidden'}))
+    price_per_itom = forms.IntegerField(widget=forms.TextInput(attrs={
+                                                        'id': 'price_per_itom',
+                                                        'name': 'price_per_itom',
+                                                        'type': 'hidden'}))
+    update = forms.BooleanField(required=False, initial=False, widget=forms.HiddenInput)
+

cart/models.py

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+from django.db import models
+from django.contrib.auth import get_user_model
+from django.contrib.postgres.fields import HStoreField
+from django.utils.translation import ugettext_lazy as _
+
+from autoslug import AutoSlugField
+
+# Create your models here.
+from core.models import AbstractStatusModel
+from products.models import Product
+
+OFFER_STATUS_ACTIVE = 25
+OFFER_STATUS_INACTIVE = 50
+
+OFFER_STATUS_CHOICES = (
+    (OFFER_STATUS_ACTIVE, _('Активный')),
+    (OFFER_STATUS_INACTIVE, _('Неактивный'))
+)
+
+OFFER_DEFAULT_CHOICE = OFFER_STATUS_INACTIVE
+
+
+class Offer(AbstractStatusModel):
+    name = models.CharField(max_length=64, blank=True, null=True, default=None)
+    slug = AutoSlugField(populate_from='name')
+    price = models.DecimalField(max_digits=8, decimal_places=2, null=True, default=0.00)
+    product = models.ForeignKey(Product, on_delete=models.CASCADE, blank=True, null=True, default=None,
+                                related_name='variants')
+    attributes = HStoreField(blank=True, null=True, default={})
+
+    status = models.SmallIntegerField(_('статус'), default=OFFER_DEFAULT_CHOICE, choices=OFFER_STATUS_CHOICES)
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        verbose_name = _('Позиция')
+        verbose_name_plural = _('Позиции')
+
+
+# ------------------------------------------ Buying status --------------------------------------------------- #
+BUYING_STATUS_IN_CART = 25
+BUYING_STATUS_BOUGHT = 50
+BUYING_STATUS_CHOICES = (
+    (BUYING_STATUS_IN_CART, _('В корзине')),
+    (BUYING_STATUS_BOUGHT, _('Куплен'))
+)
+
+BUYING_DEFAULT_CHOICE = BUYING_STATUS_IN_CART
+
+
+class Buying(AbstractStatusModel):
+    user = models.ForeignKey(get_user_model(),verbose_name=_('Пользователь'), on_delete=models.CASCADE, )
+    offer = models.ForeignKey(Offer, verbose_name=_('Позиция'), on_delete=models.CASCADE)
+    status = models.SmallIntegerField(_('статус'), default=BUYING_DEFAULT_CHOICE, choices=BUYING_STATUS_CHOICES)
+
+    class Meta:
+        verbose_name = _('Покупка')
+        verbose_name_plural = _('Покупки')

cart/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

cart/urls.py

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+from django.conf.urls import url
+from django.urls import re_path
+
+from . import views
+
+urlpatterns = [
+    # url(r'^$', views.CartDetail, name='CartDetail'),
+    # url(r'^remove/(?P<offer_slug>[-\w]+)/$', views.CartRemove, name='CartRemove'),
+    # url(r'^add/$', views.CartAdd, name='CartAdd'),
+    re_path(r'^buyings/history/', views.BuyingsHistory.as_view(), name='buyings_history')
+
+]

cart/views.py

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+from django.shortcuts import render, redirect, get_object_or_404
+from django.views.decorators.http import require_POST
+from django.views.decorators.csrf import csrf_exempt
+from django.contrib.auth.decorators import login_required
+from django.contrib import auth
+from django.views.generic import ListView
+
+from cart.models import Buying
+from core.views import ProtectedView
+
+from .cart import Cart
+from .forms import CartAddProductForm
+# from discount.layout import DiscountApllyForm
+
+# @csrf_exempt
+# @require_POST
+# @login_required(login_url='accounts_ext:accounts_ext')
+# def CartAdd(request):
+#     cart = Cart(request)
+#     form = CartAddProductForm(request.POST)
+#     if form.is_valid():
+#         cd = form.cleaned_data
+#         if int(cd['quantity']) < 1 or int(cd['quantity']) > 1000:
+#             return redirect(request.META.get('HTTP_REFERER'))
+#         offer = get_object_or_404(Offer, slug=cd['product_slug'])
+#         cart.add(offer=offer, price_per_itom=cd['price_per_itom'], quantity=cd['quantity'],
+#                  update_quantity=cd['update'])
+#         request.session.pop('points', None)
+#     return redirect('cart:CartDetail')
+#
+# @csrf_exempt
+# @login_required(login_url='accounts_ext:accounts_ext')
+# def CartRemove(request, offer_slug):
+#     cart = Cart(request)
+#     # offer = get_object_or_404(Offer, slug=offer_slug)
+#     cart.remove(offer_slug)
+#     request.session.pop('points', None)
+#     return redirect('cart:CartDetail')
+#
+# @csrf_exempt
+# @login_required(login_url='accounts_ext:accounts_ext')
+# def CartDetail(request):
+#     user = auth.get_user(request)
+#     cart = Cart(request)
+#     for item in cart:
+#         item['update_quantity_form'] = CartAddProductForm(
+#                                         initial={
+#                                             'quantity': item['quantity'],
+#                                             'product_slug': item['offer'].slug,
+#                                             'price_per_itom': item['price'],
+#                                             'update': True
+#                                         })
+#     # discount_apply_form = DiscountApllyForm()
+#     return render(request, 'cart/detail.html', {'username': user.username})
+#                                                 # 'discount_apply_form': discount_apply_form})
+
+
+class BuyingsHistory(ProtectedView,ListView):
+    model = Buying
+    template_name = 'cart/buying_history.html'

templates/cart/buying_history.html

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+{% extends 'base.html' %}
+{% block content %}
+    Missing buying history
+{% endblock %}