ITRadio/server/proj/audio/views.py

from rest_framework.viewsets import GenericViewSet
from rest_framework.response import Response
from rest_framework.decorators import action
from rest_framework import status
from django.core.exceptions import ObjectDoesNotExist
from rest_framework.permissions import IsAuthenticated, AllowAny
from audio.services.service import AzuraCast
from audio.schemas import SongSchema, PlayListSchema
from audio.models import Song, FavoriteSong, PlayList, Podkast
from audio.serializers import SongSerializer, FavoriteSongSerializer, PlayListSerializer, PodkastSerializer


class PodkastViewSet(GenericViewSet):
    queryset = Podkast.objects.all()
    serializer_class = PodkastSerializer
    permission_classes = (IsAuthenticated, )

    def list(self, request):
        queryset = self.get_queryset()
        serializer = self.get_serializer(queryset, many=True)
        return Response(serializer.data, status=status.HTTP_200_OK)
    
    def retrieve(self, request, pk):
        try:
            queryset = self.get_queryset().get(pk=pk)
            serializer = self.get_serializer(queryset)
            return Response(serializer.data, status=status.HTTP_200_OK)
        except ObjectDoesNotExist:
            return Response({'detail': 'Объекта не существует', 'error': {'PlayList': 'Объекта не существует'}}, 
                            status=status.HTTP_404_NOT_FOUND)
            

class PlayListViewSet(GenericViewSet):
    azura = AzuraCast()
    queryset = PlayList.objects.all()
    serializer_class = PlayListSerializer
    permission_classes = (IsAuthenticated,)

    def list(self, request):
        queryset = self.get_queryset().filter(user=request.user)
        serializer = self.get_serializer(queryset, many=True)
        return Response(serializer.data, status=status.HTTP_200_OK)
    
    def retrieve(self, request, pk):
        try:
            queryset = self.get_queryset().get(pk=pk, user=request.user)
            serializer = self.get_serializer(queryset)
            return Response(serializer.data, status=status.HTTP_200_OK)
        except ObjectDoesNotExist:
            return Response({'detail': 'Объекта не существует', 'error': {'PlayList': 'Объекта не существует'}}, 
                            status=status.HTTP_404_NOT_FOUND)
        
    @action(detail=False, methods=['post'], schema=PlayListSchema())
    def create_playlist(self, request):
        if request.data.get('name', False):
            data = request.data
            data.update(user=request.user.pk) 
        else:
            playlist_pk = self.get_queryset().filter(user=request.user.pk)
            name = f"Плейлист № {len(playlist_pk)+1}"
            data = request.data
            data.update(user=request.user.pk, name=name)
        serializer = self.get_serializer(data=request.data)
        if serializer.is_valid():
            serializer.save() 
            return Response(serializer.data)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
        
    @action(detail=True, methods=['post'], schema=PlayListSchema())
    def update_playlist(self, request, *args, **kwargs):
        instance = self.get_object()
        serializer = self.get_serializer(data=request.data, partial=True, instance=instance)
        if serializer.is_valid(raise_exception=True):
            serializer.save() 
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
        
    @action(detail=True, methods=['delete'])
    def delete_playlist(self, request, *args, **kwargs):
        item = self.get_object()
        item.delete()
        return Response({'detail': 'Объект удалён'}, status=status.HTTP_200_OK)
        
    @action(detail=True, methods=['post'], schema=PlayListSchema())
    def delete_song_with_playlist(self, request, *args, **kwargs):
        try:
            song_obj = Song.objects.get(azura_id=request.data.get('azura_id'))
        except ObjectDoesNotExist:
            return Response({'detail': 'Объекта не существует', 'error': {'Song': 'Объекта не существует'}}, 
                            status=status.HTTP_404_NOT_FOUND)
        if not self.get_queryset().filter(user=request.user, song=song_obj).exists():
            return Response({'detail': 'Объекта не существует', 'error': {'Song': 'Объекта отсутствует плейлисте'}}, 
                            status=status.HTTP_404_NOT_FOUND)
        playlist = self.get_object()
        playlist.song.remove(song_obj)
        serializer = self.get_serializer(playlist)
        return Response(serializer.data, status=status.HTTP_200_OK)
        
    @action(detail=True, methods=['post'], schema=PlayListSchema())
    def add_to_playlist(self, request, *args, **kwargs):
        instance = self.get_object()
        try:
            song = Song.objects.get(azura_id=request.data.get('azura_id')).pk
        except ObjectDoesNotExist:
            data = self.azura.add_to_playlist(request.data)
            song_serializer = SongSerializer(data=data)
            if song_serializer.is_valid():
                song_serializer.save()
                song = song_serializer.data['id']
            else:
                return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
        instance.song.add(song)
        serializer = self.get_serializer(instance)
        return Response(serializer.data)
        

class FavoriteSongViewSet(GenericViewSet):
    azura = AzuraCast()
    queryset = FavoriteSong.objects.all()
    serializer_class = FavoriteSongSerializer
    permission_classes = (IsAuthenticated, )
    lookup_field = 'azura_id'

    def list(self, request):
        queryset = self.get_queryset()
        serializer = self.get_serializer(queryset, many=True)
        return Response(serializer.data)
        
    @action(detail=True, methods=['get'])
    def check_is_favorite(self, request, azura_id, *args, **kwargs):
        try:
            song_obj = Song.objects.get(azura_id=azura_id)
        except ObjectDoesNotExist:
            return Response({'detail': 'Объекта не существует', 'error': {'Song': 'Объекта не существует'}}, 
                            status=status.HTTP_404_NOT_FOUND)
        if self.get_queryset().filter(user=request.user, song=song_obj).exists():
            return Response({"is_favorite": True}, status=status.HTTP_200_OK)
        else:
            return Response({"is_favorite": False}, status=status.HTTP_200_OK)
        
    @action(detail=False, methods=['post'], schema=SongSchema())
    def add_favorite(self, request, *args, **kwargs):
        try:
            song = Song.objects.get(azura_id=request.data.get('azura_id'))
        except ObjectDoesNotExist:
            unique_id = self.azura.get_unique_id(azura_id=request.data.get('azura_id'))
            data = request.data
            data.update(unique_id=unique_id)
            serializer = SongSerializer(data=data)
            if serializer.is_valid():
                serializer.save()
                song = serializer.data['id']
            else:
                return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
        obj, data = self.get_queryset().get_or_create(user=request.user)
        obj.song.add(song)
        serializer = self.get_serializer(obj)
        return Response(serializer.data, status=status.HTTP_200_OK)
        
    @action(detail=True, methods=['delete'])
    def delete_song(self, request, *args, **kwargs):
        try:
            song = Song.objects.get(azura_id=kwargs.get('azura_id'))
            queryset = self.get_queryset().get(user=request.user, song=song.pk)
            queryset.song.remove(song)
            serializer = self.get_serializer(queryset)
            return Response(serializer.data, status=status.HTTP_200_OK)
        except ObjectDoesNotExist:
            return Response({'detail': 'Объекта не существует', 'error': {'Song': 'Объекта не существует'}}, 
                            status=status.HTTP_404_NOT_FOUND)
    

class SongViewSet(GenericViewSet):
    azura = AzuraCast()
    queryset = Song.objects.all()
    permission_classes = (IsAuthenticated, )
    lookup_field = 'azura_id'
        
    @action(detail=True, methods=['get'])
    def get_audio(self, *args, **kwargs):
        response = self.azura.get_audio(self.get_object())
        return response
        
    @action(detail=False, methods=['get'])
    def get_all_song(self, request):
        return Response(self.azura.get_all_songs(), status=status.HTTP_200_OK)

    @action(detail=False, methods=['get'], permission_classes=(AllowAny,))
    def get_nowplaying(self, request):
        return Response(self.azura.get_nowplaying(), status=status.HTTP_200_OK)
    
    @action(detail=False, methods=['get'], permission_classes=(AllowAny,), schema=SongSchema())
    def get_song_history(self, request):
        return Response(
            self.azura.get_song_history(
                request.data['start'], 
                request.data['end']
            ), 
        status=status.HTTP_200_OK
    )