neptune/core/models.py

from django.contrib.auth.models import AbstractUser
from django.db import models

from core.lib.customers import get_or_create, update_customer_fields


class Plan(models.Model):
    name = models.CharField(max_length=255, unique=True)
    description = models.CharField(max_length=1024, null=True, blank=True)
    cost = models.IntegerField()
    product_id = models.UUIDField(null=True, blank=True)
    image = models.CharField(max_length=1024, null=True, blank=True)

    def __str__(self):
        return f"{self.name} (£{self.cost})"


class User(AbstractUser):
    # Stripe customer ID
    stripe_id = models.CharField(max_length=255, null=True, blank=True)
    subscription_id = models.CharField(max_length=255, null=True, blank=True)
    subscription_active = models.BooleanField(null=True, blank=True)
    last_payment = models.DateTimeField(null=True, blank=True)
    paid = models.BooleanField(null=True, blank=True)
    plans = models.ManyToManyField(Plan, blank=True)


def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self._original = self

    def save(self, *args, **kwargs):
        """
        Override the save function to create a Stripe customer.
        """
        if not self.stripe_id:  # stripe ID not stored
            self.stripe_id = get_or_create(self.email, self.first_name, self.last_name)

        to_update = {}
        if self.email != self._original.email:
            to_update["email"] = self.email
        if self.first_name != self._original.first_name:
            to_update["first_name"] = self.first_name
        if self.last_name != self._original.last_name:
            to_update["last_name"] = self.last_name

        update_customer_fields(self.stripe_id, **to_update)

        super().save(*args, **kwargs)

    def has_plan(self, plan):
        if not self.paid:  # We can't have any plans if we haven't paid
            return False
        plan_list = [plan.name for plan in self.plans.all()]
        return plan in plan_list