implement plan pricing

hub/services/models/services.py

@@ -4,10 +4,14 @@ from django.core.validators import URLValidator
 from django.urls import reverse
 from django.utils.text import slugify
 from django_prose_editor.fields import ProseEditorField
+from typing import TYPE_CHECKING, Optional
 
-from .base import Category, ReusableText, ManagedServiceProvider, validate_image_size
+from .base import Category, ReusableText, ManagedServiceProvider, validate_image_size, Currency
 from .providers import CloudProvider
 
+if TYPE_CHECKING:
+    from .services import PlanPrice
+
 
 class Service(models.Model):
     name = models.CharField(max_length=200)
@@ -97,10 +101,31 @@ class ServiceOffering(models.Model):
         )
 
 
+class PlanPrice(models.Model):
+    plan = models.ForeignKey(
+        'Plan', on_delete=models.CASCADE, related_name='plan_prices'
+    )
+    currency = models.CharField(
+        max_length=3,
+        choices=Currency.choices,
+    )
+    amount = models.DecimalField(
+        max_digits=10,
+        decimal_places=2,
+        help_text="Price in the specified currency, excl. VAT",
+    )
+
+    class Meta:
+        unique_together = ("plan", "currency")
+        ordering = ["currency"]
+
+    def __str__(self):
+        return f"{self.plan.name} - {self.amount} {self.currency}"
+
+
 class Plan(models.Model):
     name = models.CharField(max_length=100)
     description = ProseEditorField(blank=True, null=True)
-    pricing = ProseEditorField(blank=True, null=True)
     plan_description = models.ForeignKey(
         ReusableText,
         on_delete=models.PROTECT,
@@ -122,6 +147,13 @@ class Plan(models.Model):
     def __str__(self):
         return f"{self.offering} - {self.name}"
 
+    def get_price(self, currency_code: str) -> Optional[float]:
+        from hub.services.models.services import PlanPrice
+        price_obj = PlanPrice.objects.filter(plan=self, currency=currency_code).first()
+        if price_obj:
+            return price_obj.amount
+        return None
+
 
 class ExternalLinkOffering(models.Model):
     offering = models.ForeignKey(