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from django.conf import settings
from django.core.exceptions import ValidationError
from django.db import models
from alphabetlearning.resources.models import Resource
class Product(models.Model):
name = models.CharField(max_length=255)
stripe_product_id = models.CharField(max_length=100)
def __str__(self):
return self.name
class Price(models.Model):
product = models.ForeignKey(Product, on_delete=models.CASCADE)
price = models.IntegerField(default=0)
stripe_price_id = models.CharField(max_length=100)
def get_display_price(self):
return "{0:.2f}".format(self.price / 100)
class ShoppingCart(models.Model):
user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
def __str__(self):
return f"Shopping cart for {self.user.email}"
def add_resource(self, resource: Resource):
if CartItem.objects.filter(cart=self, resource=resource).exists():
raise ValidationError(f"{resource.name} is already in your shopping cart.")
item, created = CartItem.objects.get_or_create(
cart=self,
resource=resource,
)
if not created:
item.save()
class CartItem(models.Model):
cart = models.ForeignKey(ShoppingCart, on_delete=models.CASCADE, related_name="items")
resource = models.ForeignKey(Resource, on_delete=models.CASCADE)
added_at = models.DateTimeField(auto_now_add=True)
class Meta:
unique_together = ("cart", "resource")
def __str__(self):
return f"{self.resource.name} in {self.cart.user.username}'s cart"
class SubscriptionPlan(models.Model):
name = models.CharField(max_length=255)
price = models.DecimalField(max_digits=6, decimal_places=2)
description = models.TextField()
allowed_downloads = models.PositiveIntegerField()
class Subscription(models.Model):
user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
plan = models.ForeignKey(SubscriptionPlan, on_delete=models.CASCADE)
is_active = models.BooleanField(default=False)
start_date = models.DateTimeField(null=True, blank=True)
end_date = models.DateTimeField(null=True, blank=True)
class Meta:
constraints = [models.UniqueConstraint(fields=["user", "plan"], name="unique_user_plan")]
def __str__(self):
return f"Subscription for {self.user.username}"
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