feat: added promocode creation and view

solution/api/v1/auth.py

@@ -7,6 +7,7 @@ from ninja.security import HttpBearer
 from pydantic import BaseModel, ValidationError
 
 import apps.business.models
+import apps.user.models
 
 
 class BusinessToken(BaseModel):
@@ -28,7 +29,7 @@ class BusinessAuth(HttpBearer):
 
         try:
             business = apps.business.models.Business.objects.get(
-                id=token_payload.business_id
+                id=token_payload.business_id,
             )
         except apps.business.models.Business.DoesNotExist:
             return None
@@ -37,3 +38,31 @@ class BusinessAuth(HttpBearer):
             return None
 
         return business
+
+
+class UserToken(BaseModel):
+    user_id: uuid.UUID
+    token_version: int
+
+
+class UserAuth(HttpBearer):
+    def authenticate(self, request: HttpRequest, token: str) -> str | None:
+        try:
+            decoded_payload = jwt.decode(
+                token,
+                settings.SECRET_KEY,
+                algorithms=["HS256"],
+            )
+            token_payload = UserToken(**decoded_payload)
+        except (jwt.PyJWTError, ValidationError):
+            return None
+
+        try:
+            user = apps.user.models.User.objects.get(id=token_payload.user_id)
+        except apps.user.models.User.DoesNotExist:
+            return None
+
+        if user.token_version != token_payload.token_version:
+            return None
+
+        return user