feat: cart

web/views.py

@@ -1,9 +1,11 @@
 from django.shortcuts import get_object_or_404
 from django.views.generic import TemplateView
+from django.http.response import HttpResponse
+from django.views.decorators.http import require_http_methods
 
-from shop.filters import ProductFilter
-from shop.models import Product
-from web.mixins import FilteredQuerysetMixin, PaginatedQuerysetMixin
+from shop.models import Product, Cart, CartItem
+from web.utils import get_cart
+from web.settings import ANONYMOUS_CART_ID_COOKIE_NAME
 
 
 class IndexView(TemplateView):
@@ -15,22 +17,6 @@ class IndexView(TemplateView):
         }
 
 
-class ListProducts(TemplateView, FilteredQuerysetMixin, PaginatedQuerysetMixin):
-    template_name = "web/list_products.html"
-    queryset = Product.objects.all()
-    filter_class = ProductFilter
-
-    def get_context_data(self, **kwargs):
-        qs = self.get_queryset()
-        page = self.get_paginated_queryset(qs)
-
-        return {
-            "page": page,
-            "has_next_page": page.has_next(),
-            "has_previous_page": page.has_previous(),
-        }
-
-
 class ProductDetail(TemplateView):
     template_name = "web/product_detail.html"
 
@@ -45,6 +31,49 @@ class ProductDetail(TemplateView):
         }
 
 
+@require_http_methods(
+    [
+        "POST",
+    ]
+)
+def add_cart_item(request, *args, **kwargs):
+    product = get_object_or_404(Product, pk=request.POST.get("product"))
+    response = HttpResponse(status=201)
+
+    if not request.user.is_authenticated:
+        cart = Cart.objects.create(
+            user=None,
+        )
+    else:
+        cart, created = Cart.objects.get_or_create(user=request.user)
+        response.set_cookie(ANONYMOUS_CART_ID_COOKIE_NAME, cart.uuid)
+
+    existing_cart_item = CartItem.objects.filter(cart=cart, product=product).first()
+
+    if existing_cart_item is not None:
+        existing_cart_item.quantity += int(request.POST.get("quantity"))
+        existing_cart_item.save()
+    else:
+        CartItem.objects.create(
+            cart=cart,
+            quantity=request.POST.get("quantity"),
+            product=product,
+        )
+
+    return response
+
+
+@require_http_methods(
+    [
+        "POST",
+    ]
+)
+def delete_cart_item(request, pk, *args, **kwargs):
+    cart = get_cart(request)
+    cart_item = get_object_or_404(CartItem, pk=pk, cart=cart)
+    cart_item.delete()
+    return HttpResponse(status=204)
+
+
 index = IndexView.as_view()
-list_products = ListProducts.as_view()
 product_detail = ProductDetail.as_view()