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# blog/api/views.py — APIView and generic views
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status, generics, permissions
from ..models import Post
from ..serializers import PostSerializer

# --- Low-level APIView ---
class PostListAPIView(APIView):
    permission_classes = [permissions.IsAuthenticatedOrReadOnly]

def get(self, request):
        posts = Post.published.select_related('author').order_by('-published_at')
        serializer = PostSerializer(posts, many=True, context={'request': request})
        return Response(serializer.data)

def post(self, request):
        serializer = PostSerializer(data=request.data, context={'request': request})
        if serializer.is_valid():
            serializer.save(author=request.user)
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

# --- Generic views (preferred) ---
class PostListCreateView(generics.ListCreateAPIView):
    queryset           = Post.published.select_related('author')
    serializer_class   = PostSerializer
    permission_classes = [permissions.IsAuthenticatedOrReadOnly]

def perform_create(self, serializer):
        serializer.save(author=self.request.user)

class PostRetrieveUpdateDestroyView(generics.RetrieveUpdateDestroyAPIView):
    queryset           = Post.published.all()
    serializer_class   = PostSerializer
    permission_classes = [permissions.IsAuthenticatedOrReadOnly]

def perform_update(self, serializer):
        serializer.save(author=self.request.user)