166 lines
4.9 KiB
Python
166 lines
4.9 KiB
Python
from decimal import Decimal
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from django.contrib import messages
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from django.shortcuts import get_object_or_404, redirect, render
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from django.utils import timezone
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from products.models import Product
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from .models import Coupon
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def get_cart(request):
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return request.session.get('cart', {})
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def save_cart(request, cart):
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request.session['cart'] = cart
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request.session.modified = True
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def _redirect_after_add(request):
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next_url = request.GET.get('next', '').strip()
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if next_url.startswith('/'):
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return redirect(next_url)
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return redirect('cart')
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def add_to_cart(request, id):
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product = get_object_or_404(Product, id=id)
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cart = get_cart(request)
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current_qty = cart.get(str(id), 0)
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if current_qty + 1 > product.stock:
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messages.warning(request, f'Only {product.stock} units of {product.name} are available.')
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else:
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cart[str(id)] = current_qty + 1
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messages.success(request, f'Added {product.name} to your cart.')
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save_cart(request, cart)
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return _redirect_after_add(request)
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def buy_now(request, id):
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product = get_object_or_404(Product, id=id)
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if product.stock <= 0:
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messages.error(request, f'{product.name} is out of stock.')
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return redirect('product_detail', product_id=product.id)
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request.session['buy_now'] = {str(product.id): 1}
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request.session.modified = True
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messages.info(request, f'Proceeding to checkout for {product.name}.')
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return redirect('checkout')
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def update_cart(request, id):
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if request.method == 'POST':
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qty = int(request.POST.get('quantity', 1))
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product = get_object_or_404(Product, id=id)
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cart = get_cart(request)
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if qty <= 0:
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cart.pop(str(id), None)
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messages.info(request, f'{product.name} removed from cart.')
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elif qty > product.stock:
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cart[str(id)] = product.stock
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messages.warning(request, f'Quantity adjusted to {product.stock} for {product.name}.')
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else:
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cart[str(id)] = qty
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messages.success(request, f'Cart updated for {product.name}.')
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save_cart(request, cart)
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return redirect('cart')
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def remove_from_cart(request, id):
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cart = get_cart(request)
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if str(id) in cart:
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del cart[str(id)]
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messages.info(request, 'Item removed from your cart.')
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save_cart(request, cart)
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return redirect('cart')
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def _get_coupon_for_cart(code, subtotal):
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if not code:
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return None, Decimal('0')
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now = timezone.now()
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coupon = Coupon.objects.filter(code=code, active=True).first()
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if not coupon:
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return None, Decimal('0')
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if coupon.valid_from and now < coupon.valid_from:
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return None, Decimal('0')
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if coupon.valid_to and now > coupon.valid_to:
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return None, Decimal('0')
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if subtotal < coupon.min_purchase:
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return coupon, Decimal('0')
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discount = (subtotal * (coupon.discount_percent / Decimal('100'))).quantize(Decimal('0.01'))
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return coupon, discount
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def apply_coupon(request):
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if request.method == 'POST':
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code = request.POST.get('coupon_code', '').strip().upper()
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request.session['coupon_code'] = code
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messages.success(request, f'Coupon {code} applied.')
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return redirect('cart')
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def remove_coupon(request):
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request.session.pop('coupon_code', None)
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messages.info(request, 'Coupon removed.')
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return redirect('cart')
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def cart_view(request):
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cart = get_cart(request)
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products = []
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subtotal = Decimal('0')
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item_count = 0
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saved_amount = Decimal('0')
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for id, qty in cart.items():
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product = get_object_or_404(Product, id=int(id))
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product.qty = qty
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product.subtotal = product.display_price * qty
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subtotal += product.subtotal
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item_count += qty
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saved_amount += Decimal(str(product.savings or 0)) * qty
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products.append(product)
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shipping = Decimal('60') if products else Decimal('0')
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coupon_code = request.session.get('coupon_code', '')
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coupon, discount = _get_coupon_for_cart(coupon_code, subtotal)
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if coupon_code and not coupon:
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request.session.pop('coupon_code', None)
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messages.warning(request, 'Coupon is invalid or expired.')
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coupon_code = ''
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if coupon and subtotal < coupon.min_purchase:
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messages.warning(request, f'Coupon requires minimum purchase of Rs. {coupon.min_purchase}.')
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discount = Decimal('0')
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grand_total = subtotal - discount + shipping
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return render(
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request,
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'cart/cart.html',
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{
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'products': products,
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'subtotal': subtotal,
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'total': subtotal,
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'shipping': shipping,
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'discount': discount,
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'grand_total': grand_total,
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'coupon_code': coupon_code,
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'coupon': coupon,
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'item_count': item_count,
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'saved_amount': saved_amount,
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},
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)
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