2024-02-19 05:43:38 +00:00
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from decimal import Decimal
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from django.conf import settings
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from main.models import Product
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class Cart:
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def __init__(self, request):
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"""
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Initialize the cart.
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"""
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self.session = request.session
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2024-03-05 11:23:18 +00:00
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cart = self.session.get(settings.CART_SESSION_ID)
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2024-02-19 05:43:38 +00:00
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if not cart:
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# save an empty cart in the session
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2024-03-05 11:23:18 +00:00
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cart = self.session[settings.CART_SESSION_ID] = {}
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2024-02-19 05:43:38 +00:00
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self.cart = cart
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def __iter__(self):
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"""
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Iterate over the items in the cart and get the products
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from the database.
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"""
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2024-03-05 11:23:18 +00:00
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product_ids = self.cart.keys()
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# get the product objects and add them to the cart
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2024-02-19 05:43:38 +00:00
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products = Product.objects.filter(id__in=product_ids)
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cart = self.cart.copy()
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for product in products:
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cart[str(product.id)]['product'] = product
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for item in cart.values():
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item['price'] = Decimal(item['price'])
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item['total_price'] = item['price'] * item['quantity']
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yield item
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def __len__(self):
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"""
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Count all items in the cart.
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"""
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return sum(item['quantity'] for item in self.cart.values())
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def add(self, product, quantity=1, override_quantity=False):
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"""
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Add a product to the cart or update its quantity.
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"""
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product_id = str(product.id)
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if product_id not in self.cart:
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self.cart[product_id] = {'quantity': 0,
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'price': str(product.price)}
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if override_quantity:
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self.cart[product_id]['quantity'] = quantity
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else:
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self.cart[product_id]['quantity'] += quantity
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self.save()
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def save(self):
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# mark the session as "modified" to make sure it gets saved
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self.session.modified = True
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def remove(self, product):
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"""
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Remove a product from the cart.
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"""
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product_id = str(product.id)
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if product_id in self.cart:
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del self.cart[product_id]
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self.save()
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def clear(self):
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# remove cart from session
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del self.session[settings.CART_SESSION_ID]
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self.save()
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def get_total_price(self):
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return sum(Decimal(item['price']) * item['quantity'] for item in self.cart.values())
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