AdventureLog/backend/server/worldtravel/views.py

from django.shortcuts import render
from .models import Country, Region, VisitedRegion
from .serializers import CountrySerializer, RegionSerializer, VisitedRegionSerializer
from rest_framework import viewsets, status
from rest_framework.permissions import IsAuthenticated
from django.shortcuts import get_object_or_404
from rest_framework.response import Response
from rest_framework.decorators import api_view, permission_classes

@api_view(['GET'])
@permission_classes([IsAuthenticated])
def regions_by_country(request, country_code):
    # require authentication
    country = get_object_or_404(Country, country_code=country_code)
    regions = Region.objects.filter(country=country)
    serializer = RegionSerializer(regions, many=True)
    return Response(serializer.data)

@api_view(['GET'])
@permission_classes([IsAuthenticated])
def visits_by_country(request, country_code):
    country = get_object_or_404(Country, country_code=country_code)
    visits = VisitedRegion.objects.filter(region__country=country, user_id=request.user.id)

    serializer = VisitedRegionSerializer(visits, many=True)
    return Response(serializer.data)

class CountryViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = Country.objects.all()
    serializer_class = CountrySerializer
    permission_classes = [IsAuthenticated]

class RegionViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = Region.objects.all()
    serializer_class = RegionSerializer
    permission_classes = [IsAuthenticated]

class VisitedRegionViewSet(viewsets.ModelViewSet):
    serializer_class = VisitedRegionSerializer
    permission_classes = [IsAuthenticated]

    def get_queryset(self):
        return VisitedRegion.objects.filter(user_id=self.request.user.id)

    def create(self, request, *args, **kwargs):
        # Set the user_id to the request user's ID
        request.data['user_id'] = request.user.id
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)