Azimkin
52cbc1c2b3
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- Added `Cart` and `CartItem` models with migrations for managing user-specific carts and items - Developed services for cart-related operations: adding, removing, and updating cart items - Built specialized templates (`cart.html`) and styled them with new CSS assets (`cart.css`) - Enabled real-time UI updates via AJAX in shopping cart interactions (`cart.js`) - Modified header to dynamically display cart link with user authentication awareness - Added Leaflet-based interactive map to the contacts page and integrated CSS/JS dependencies - Expanded tests for cart functionality, item detail page cart integration, and contacts page maps
107 lines
3.6 KiB
Python
107 lines
3.6 KiB
Python
from decimal import Decimal
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from django.contrib import messages
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from django.contrib.auth.decorators import login_required
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from django.core.exceptions import ValidationError
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from django.http import Http404, HttpRequest, HttpResponse
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from django.shortcuts import get_object_or_404, redirect, render
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from django.urls import reverse
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from django.utils.http import url_has_allowed_host_and_scheme
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from django.views.decorators.http import require_POST
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from items.models import Item
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from orders.models import CartItem
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from orders.services import (
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add_item_to_cart,
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format_currency,
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get_user_cart,
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remove_item_from_cart,
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update_cart_item_quantity,
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)
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def resolve_next_url(request: HttpRequest, fallback: str) -> str:
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next_url = request.POST.get("next") or fallback
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if not url_has_allowed_host_and_scheme(
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next_url,
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allowed_hosts={request.get_host()},
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require_https=request.is_secure(),
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):
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return fallback
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return next_url
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@login_required
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def cart(request: HttpRequest) -> HttpResponse:
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cart_items: list[CartItem] = []
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total_quantity = 0
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total_amount = "0,00 руб."
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cart_obj = get_user_cart(request.user)
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if cart_obj:
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cart_items = list(
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cart_obj.items.select_related("item__category", "item__subcategory").prefetch_related("item__images")
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)
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total_quantity = sum(cart_item.quantity for cart_item in cart_items)
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total_amount_value = sum(
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(cart_item.item.price * cart_item.quantity for cart_item in cart_items),
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start=Decimal("0.00"),
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)
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total_amount = format_currency(total_amount_value)
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return render(request, "orders/cart.html", {
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"cart_items": cart_items,
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"total_quantity": total_quantity,
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"total_amount": total_amount,
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})
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@login_required
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@require_POST
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def add(request: HttpRequest) -> HttpResponse:
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item = get_object_or_404(Item, pk=request.POST.get("item_id"))
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try:
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_, created = add_item_to_cart(request.user, item)
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if created:
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messages.success(request, f"Товар «{item.name}» добавлен в корзину.")
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else:
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messages.info(request, f"Товар «{item.name}» уже есть в корзине.")
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except ValidationError as error:
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messages.error(request, error.message)
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return redirect(resolve_next_url(request, reverse("orders:cart")))
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@login_required
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@require_POST
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def remove(request: HttpRequest) -> HttpResponse:
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item = get_object_or_404(Item, pk=request.POST.get("item_id"))
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removed = remove_item_from_cart(request.user, item.id)
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if removed:
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messages.success(request, f"Товар «{item.name}» удалён из корзины.")
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else:
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messages.info(request, f"Товар «{item.name}» уже отсутствует в корзине.")
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return redirect(resolve_next_url(request, reverse("orders:cart")))
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@login_required
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@require_POST
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def update_quantity(request: HttpRequest) -> HttpResponse:
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item = get_object_or_404(Item, pk=request.POST.get("item_id"))
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try:
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quantity = int(request.POST.get("quantity"))
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update_cart_item_quantity(request.user, item.id, quantity)
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messages.success(request, f"Количество товара «{item.name}» обновлено.")
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except (TypeError, ValueError):
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messages.error(request, "Некорректное количество товара.")
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except CartItem.DoesNotExist as error:
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raise Http404() from error
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except ValidationError as error:
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messages.error(request, error.message)
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return redirect(resolve_next_url(request, reverse("orders:cart")))
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