feat: implemented Redis caching for user data

user_app/caching.py

@@ -22,3 +22,12 @@ def get_cached_user(user_id):
         return json.loads(user_data)[0]['fields']
     else:
         return None
+
+
+def cache_user(user_id, user_data, timeout=3600):
+    """
+    Saves user data in the cache.
+    """
+    cache_key = f"user_{user_id}"
+    user_json = json.dumps(user_data) 
+    cache.set(cache_key, user_json, timeout)

user_app/views.py

@@ -1,7 +1,22 @@
 from rest_framework import viewsets
+from rest_framework.response import Response
 from .models import User
 from .serializers import UserSerializer
+from .caching import get_cached_user, cache_user
 
 class UserViewSet(viewsets.ModelViewSet):
     queryset = User.objects.all()
     serializer_class = UserSerializer
+
+    def retrieve(self, request, *args, **kwargs):
+        user_id = kwargs.get("pk")
+        cached_user = get_cached_user(user_id)
+        
+        if cached_user:
+            return Response(cached_user)
+
+        user = self.get_object()
+        serialized_user = UserSerializer(user).data
+        cache_user(user_id, serialized_user)
+
+        return Response(serialized_user)