updated api, added music endpoints

akarpov/common/api/serializers.py

@@ -1,5 +1,7 @@
 from rest_framework import serializers
 
+from akarpov.utils.models import get_model_user_field
+
 
 class RecursiveField(serializers.Serializer):
     def to_representation(self, value):
@@ -9,6 +11,19 @@ def to_representation(self, value):
 
 class SetUserModelSerializer(serializers.ModelSerializer):
     def create(self, validated_data):
-        creator = self.context["request"].user
-        obj = self.Meta.model.objects.create(creator=creator, **validated_data)
+        if self.context["request"].user.is_authenticated:
+            creator = self.context["request"].user
+        else:
+            creator = None
+        validated_data[
+            get_model_user_field(
+                self.Meta.model._meta.app_label, self.Meta.model._meta.model_name
+            )
+        ] = creator
+        try:
+            obj = self.Meta.model.objects.create(**validated_data)
+        except TypeError:
+            raise serializers.ValidationError(
+                {"detail": "You need to login to create this object"}
+            )
         return obj

akarpov/music/api/filters.py

@@ -0,0 +1,9 @@
+from django_filters import rest_framework as filters
+
+from akarpov.music.models import Playlist
+
+
+class PlaylistFilter(filters.FilterSet):
+    class Meta:
+        model = Playlist
+        fields = ()

akarpov/music/api/serializers.py

@@ -2,37 +2,40 @@
 from rest_framework import serializers
 
 from akarpov.common.api.serializers import SetUserModelSerializer
-from akarpov.music.models import Album, Author, Playlist, Song
+from akarpov.music.models import (
+    Album,
+    Author,
+    Playlist,
+    PlaylistSong,
+    Song,
+    SongUserRating,
+)
 from akarpov.users.api.serializers import UserPublicInfoSerializer
 
 
 class AuthorSerializer(serializers.ModelSerializer):
-    url = serializers.SerializerMethodField(method_name="get_url")
-
-    @extend_schema_field(serializers.URLField)
-    def get_url(self, obj):
-        return obj.get_absolute_url()
-
     class Meta:
         model = Author
-        fields = ["name", "link", "image_cropped", "url"]
+        fields = ["name", "slug", "link", "image_cropped"]
 
 
 class AlbumSerializer(serializers.ModelSerializer):
-    url = serializers.SerializerMethodField(method_name="get_url")
-
-    @extend_schema_field(serializers.URLField)
-    def get_url(self, obj):
-        return obj.get_absolute_url()
-
     class Meta:
         model = Album
-        fields = ["name", "link", "image_cropped", "url"]
+        fields = ["name", "slug", "link", "image_cropped"]
 
 
 class SongSerializer(serializers.ModelSerializer):
     authors = AuthorSerializer(many=True)
     album = AlbumSerializer()
+    liked = serializers.SerializerMethodField(method_name="get_liked")
+
+    @extend_schema_field(serializers.BooleanField)
+    def get_liked(self, obj):
+        if self.context["request"].user.is_authenticated:
+            return SongUserRating.objects.filter(
+                song=obj, user=self.context["request"].user, like=True
+            ).exists()
 
     class Meta:
         model = Song
@@ -45,6 +48,7 @@ class Meta:
             "file",
             "authors",
             "album",
+            "liked",
         ]
         extra_kwargs = {
             "slug": {"read_only": True},
@@ -58,12 +62,15 @@ class ListSongSerializer(SetUserModelSerializer):
     album = serializers.CharField(source="album.name", read_only=True)
     liked = serializers.SerializerMethodField(method_name="get_liked")
 
+    @extend_schema_field(serializers.BooleanField)
     def get_liked(self, obj):
+        if "likes" in self.context:
+            return self.context["likes"]
         return obj.id in self.context["likes_ids"]
 
     class Meta:
         model = Song
-        fields = ["name", "slug", "file", "image_cropped", "length", "album"]
+        fields = ["name", "slug", "file", "image_cropped", "length", "album", "liked"]
         extra_kwargs = {
             "slug": {"read_only": True},
             "image_cropped": {"read_only": True},
@@ -73,14 +80,15 @@ class Meta:
 
 
 class PlaylistSerializer(SetUserModelSerializer):
-    creator = UserPublicInfoSerializer()
+    creator = UserPublicInfoSerializer(read_only=True)
 
     class Meta:
         model = Playlist
-        fields = ["name", "slug", "private", "creator"]
+        fields = ["name", "length", "slug", "private", "creator"]
         extra_kwargs = {
             "slug": {"read_only": True},
             "creator": {"read_only": True},
+            "length": {"read_only": True},
         }
 
 
@@ -95,3 +103,131 @@ class Meta:
             "slug": {"read_only": True},
             "creator": {"read_only": True},
         }
+
+
+class AddSongToPlaylistSerializer(serializers.ModelSerializer):
+    song = serializers.SlugField()
+    playlist = serializers.SlugField()
+
+    class Meta:
+        model = Playlist
+        fields = ["song", "playlist"]
+        extra_kwargs = {
+            "song": {"write_only": True},
+            "playlist": {"write_only": True},
+        }
+
+    def validate(self, attrs):
+        if not Playlist.objects.filter(slug=attrs["playlist"]).exists():
+            raise serializers.ValidationError("Playlist not found")
+        if not Song.objects.filter(slug=attrs["song"]).exists():
+            raise serializers.ValidationError("Song not found")
+        if self.context["create"]:
+            if PlaylistSong.objects.filter(
+                playlist__slug=attrs["playlist"], song__slug=attrs["song"]
+            ).exists():
+                raise serializers.ValidationError("Song already in playlist")
+        else:
+            if not PlaylistSong.objects.filter(
+                playlist__slug=attrs["playlist"], song__slug=attrs["song"]
+            ).exists():
+                raise serializers.ValidationError("Song not in playlist")
+        return attrs
+
+    def create(self, validated_data):
+        playlist = Playlist.objects.get(slug=validated_data["playlist"])
+        song = Song.objects.get(slug=validated_data["song"])
+        if not self.context["create"]:
+            playlist_song = PlaylistSong.objects.get(
+                playlist=playlist, song=song
+            ).delete()
+        else:
+            order = playlist.songs.count()
+            playlist_song = playlist.songs.create(song=song, order=order)
+        return playlist_song
+
+
+class LikeDislikeSongSerializer(serializers.ModelSerializer):
+    song = serializers.SlugField()
+
+    class Meta:
+        model = SongUserRating
+        fields = ["song"]
+        extra_kwargs = {
+            "song": {"write_only": True},
+        }
+
+    def validate(self, attrs):
+        if not Song.objects.filter(slug=attrs["song"]).exists():
+            raise serializers.ValidationError("Song not found")
+        return attrs
+
+    def create(self, validated_data):
+        song = Song.objects.get(slug=validated_data["song"])
+        if self.context["like"]:
+            if SongUserRating.objects.filter(
+                song=song, user=self.context["request"].user
+            ).exists():
+                song_user_rating = SongUserRating.objects.get(
+                    song=song, user=self.context["request"].user
+                )
+                if song_user_rating.like:
+                    song_user_rating.delete()
+                else:
+                    song_user_rating.like = True
+                    song_user_rating.save()
+            else:
+                song_user_rating = SongUserRating.objects.create(
+                    song=song, user=self.context["request"].user, like=True
+                )
+        else:
+            if SongUserRating.objects.filter(
+                song=song, user=self.context["request"].user
+            ).exists():
+                song_user_rating = SongUserRating.objects.get(
+                    song=song, user=self.context["request"].user
+                )
+                if not song_user_rating.like:
+                    song_user_rating.delete()
+                else:
+                    song_user_rating.like = False
+                    song_user_rating.save()
+            else:
+                song_user_rating = SongUserRating.objects.create(
+                    song=song, user=self.context["request"].user, like=False
+                )
+        return song_user_rating
+
+
+class ListPlaylistSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Playlist
+        fields = ["name", "slug", "private"]
+        extra_kwargs = {
+            "slug": {"read_only": True},
+            "private": {"read_only": True},
+        }
+
+
+class FullAlbumSerializer(serializers.ModelSerializer):
+    songs = ListSongSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = Album
+        fields = ["name", "link", "image", "songs"]
+        extra_kwargs = {
+            "link": {"read_only": True},
+            "image": {"read_only": True},
+        }
+
+
+class FullAuthorSerializer(serializers.ModelSerializer):
+    songs = ListSongSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = Author
+        fields = ["name", "link", "image", "songs"]
+        extra_kwargs = {
+            "link": {"read_only": True},
+            "image": {"read_only": True},
+        }

akarpov/music/api/urls.py

@@ -1,8 +1,19 @@
 from django.urls import path
 
 from akarpov.music.api.views import (
+    AddSongToPlaylistAPIView,
+    DislikeSongAPIView,
+    LikeSongAPIView,
+    ListAlbumsAPIView,
+    ListAuthorsAPIView,
     ListCreatePlaylistAPIView,
     ListCreateSongAPIView,
+    ListDislikedSongsAPIView,
+    ListLikedSongsAPIView,
+    ListPublicPlaylistAPIView,
+    RemoveSongFromPlaylistAPIView,
+    RetrieveUpdateDestroyAlbumAPIView,
+    RetrieveUpdateDestroyAuthorAPIView,
     RetrieveUpdateDestroyPlaylistAPIView,
     RetrieveUpdateDestroySongAPIView,
 )
@@ -10,9 +21,16 @@
 app_name = "music"
 
 urlpatterns = [
+    path("song/liked/", ListLikedSongsAPIView.as_view(), name="list_liked"),
+    path("song/disliked/", ListDislikedSongsAPIView.as_view(), name="list_disliked"),
     path(
         "playlists/", ListCreatePlaylistAPIView.as_view(), name="list_create_playlist"
     ),
+    path(
+        "playlists/public/",
+        ListPublicPlaylistAPIView.as_view(),
+        name="list_public",
+    ),
     path(
         "playlists/<str:slug>",
         RetrieveUpdateDestroyPlaylistAPIView.as_view(),
@@ -24,4 +42,20 @@
         RetrieveUpdateDestroySongAPIView.as_view(),
         name="retrieve_update_delete_song",
     ),
+    path("song/like/", LikeSongAPIView.as_view()),
+    path("song/dislike/", DislikeSongAPIView.as_view()),
+    path("playlists/add/", AddSongToPlaylistAPIView.as_view()),
+    path("playlists/remove/", RemoveSongFromPlaylistAPIView.as_view()),
+    path("albums/", ListAlbumsAPIView.as_view(), name="list_albums"),
+    path(
+        "albums/<str:slug>",
+        RetrieveUpdateDestroyAlbumAPIView.as_view(),
+        name="retrieve_update_delete_album",
+    ),
+    path("authors/", ListAuthorsAPIView.as_view(), name="list_authors"),
+    path(
+        "authors/<str:slug>",
+        RetrieveUpdateDestroyAuthorAPIView.as_view(),
+        name="retrieve_update_delete_author",
+    ),
 ]

akarpov/music/api/views.py

@@ -3,12 +3,19 @@
 from akarpov.common.api.pagination import StandardResultsSetPagination
 from akarpov.common.api.permissions import IsAdminOrReadOnly, IsCreatorOrReadOnly
 from akarpov.music.api.serializers import (
+    AddSongToPlaylistSerializer,
+    AlbumSerializer,
+    AuthorSerializer,
+    FullAlbumSerializer,
+    FullAuthorSerializer,
     FullPlaylistSerializer,
+    LikeDislikeSongSerializer,
+    ListPlaylistSerializer,
     ListSongSerializer,
     PlaylistSerializer,
     SongSerializer,
 )
-from akarpov.music.models import Playlist, Song, SongUserRating
+from akarpov.music.models import Album, Author, Playlist, Song, SongUserRating
 
 
 class LikedSongsContextMixin(generics.GenericAPIView):
@@ -26,11 +33,23 @@ def get_serializer_context(self):
 
 
 class ListCreatePlaylistAPIView(generics.ListCreateAPIView):
-    permission_classes = [permissions.IsAuthenticated]
+    permission_classes = [permissions.IsAuthenticatedOrReadOnly]
     serializer_class = PlaylistSerializer
 
     def get_queryset(self):
-        return Playlist.objects.filter(creator=self.request.user)
+        if self.request.user.is_authenticated:
+            return Playlist.objects.filter(creator=self.request.user).select_related(
+                "creator"
+            )
+        return Playlist.objects.filter(private=False).select_related("creator")
+
+
+class ListPublicPlaylistAPIView(generics.ListAPIView):
+    permission_classes = [permissions.AllowAny]
+    serializer_class = PlaylistSerializer
+
+    def get_queryset(self):
+        return Playlist.objects.filter(private=False)
 
 
 class RetrieveUpdateDestroyPlaylistAPIView(
@@ -41,14 +60,11 @@ class RetrieveUpdateDestroyPlaylistAPIView(
     permission_classes = [IsCreatorOrReadOnly]
     serializer_class = FullPlaylistSerializer
 
-    def __init__(self, **kwargs):
-        super().__init__(**kwargs)
-        self.object = None
-
-    def get_object(self):
-        if not self.object:
-            self.object = super().get_object()
-        return self.object
+    def get_queryset(self):
+        qs = Playlist.objects.filter(private=False)
+        if self.request.user.is_authenticated:
+            qs = Playlist.objects.filter(creator=self.request.user) | qs
+        return qs.select_related("creator")
 
 
 class ListCreateSongAPIView(LikedSongsContextMixin, generics.ListCreateAPIView):
@@ -59,9 +75,11 @@ class ListCreateSongAPIView(LikedSongsContextMixin, generics.ListCreateAPIView):
     def get_queryset(self):
         if self.request.user.is_authenticated:
             return (
-                Song.objects.exclude(
+                Song.objects.all()
+                .exclude(
                     id__in=SongUserRating.objects.filter(
-                        user=self.request.user
+                        user=self.request.user,
+                        like=False,
                     ).values_list("song_id", flat=True)
                 )
                 .prefetch_related("authors")
@@ -76,29 +94,149 @@ class RetrieveUpdateDestroySongAPIView(generics.RetrieveUpdateDestroyAPIView):
     permission_classes = [IsCreatorOrReadOnly]
     serializer_class = SongSerializer
 
-    def __init__(self, **kwargs):
-        super().__init__(**kwargs)
-        self.object = None
+    def get_queryset(self):
+        return Song.objects.all()
 
-    def get_object(self):
-        if not self.object:
-            self.object = super().get_object()
-        return self.object
+
+class ListSongPlaylistsAPIView(generics.ListAPIView):
+    serializer_class = ListPlaylistSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        return Playlist.objects.filter(
+            songs__song__slug=self.kwargs["slug"], creator=self.request.user
+        )
 
 
 class ListLikedSongsAPIView(generics.ListAPIView):
     serializer_class = ListSongSerializer
     pagination_class = StandardResultsSetPagination
-    authentication_classes = [permissions.IsAuthenticated]
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_serializer_context(self):
+        context = super().get_serializer_context()
+        context["likes"] = True
+        return context
 
     def get_queryset(self):
         return (
             Song.objects.cache()
             .filter(
-                id__in=self.request.user.song_likes.objects.cache()
-                .all()
+                id__in=SongUserRating.objects.cache()
+                .filter(user=self.request.user, like=True)
                 .values_list("song_id", flat=True)
             )
             .prefetch_related("authors")
             .select_related("album")
         )
+
+
+class ListDislikedSongsAPIView(generics.ListAPIView):
+    serializer_class = ListSongSerializer
+    pagination_class = StandardResultsSetPagination
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_serializer_context(self):
+        context = super().get_serializer_context()
+        context["likes"] = False
+        return context
+
+    def get_queryset(self):
+        return (
+            Song.objects.cache()
+            .filter(
+                id__in=SongUserRating.objects.cache()
+                .filter(user=self.request.user, like=True)
+                .values_list("song_id", flat=False)
+            )
+            .prefetch_related("authors")
+            .select_related("album")
+        )
+
+
+class AddSongToPlaylistAPIView(generics.CreateAPIView):
+    serializer_class = AddSongToPlaylistSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        return Playlist.objects.filter(creator=self.request.user)
+
+    def get_serializer_context(self, **kwargs):
+        context = super().get_serializer_context()
+        context["create"] = True
+        return context
+
+
+class RemoveSongFromPlaylistAPIView(generics.DestroyAPIView):
+    serializer_class = AddSongToPlaylistSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        return Playlist.objects.filter(creator=self.request.user)
+
+    def get_serializer_context(self, **kwargs):
+        context = super().get_serializer_context()
+        context["create"] = False
+        return context
+
+
+class LikeSongAPIView(generics.CreateAPIView):
+    serializer_class = LikeDislikeSongSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        return SongUserRating.objects.all()
+
+    def get_serializer_context(self, **kwargs):
+        context = super().get_serializer_context()
+        context["like"] = True
+        return context
+
+
+class DislikeSongAPIView(generics.CreateAPIView):
+    serializer_class = LikeDislikeSongSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        return SongUserRating.objects.all()
+
+    def get_serializer_context(self, **kwargs):
+        context = super().get_serializer_context()
+        context["like"] = False
+        return context
+
+
+class ListAlbumsAPIView(generics.ListAPIView):
+    serializer_class = AlbumSerializer
+    pagination_class = StandardResultsSetPagination
+    permission_classes = [permissions.AllowAny]
+
+    def get_queryset(self):
+        return Album.objects.all()
+
+
+class RetrieveUpdateDestroyAlbumAPIView(
+    LikedSongsContextMixin, generics.RetrieveUpdateDestroyAPIView
+):
+    lookup_field = "slug"
+    lookup_url_kwarg = "slug"
+    permission_classes = [IsAdminOrReadOnly]
+    serializer_class = FullAlbumSerializer
+
+
+class ListAuthorsAPIView(generics.ListAPIView):
+    serializer_class = AuthorSerializer
+    pagination_class = StandardResultsSetPagination
+    permission_classes = [permissions.AllowAny]
+
+    def get_queryset(self):
+        return Author.objects.all()
+
+
+class RetrieveUpdateDestroyAuthorAPIView(
+    LikedSongsContextMixin, generics.RetrieveUpdateDestroyAPIView
+):
+    lookup_field = "slug"
+    lookup_url_kwarg = "slug"
+    permission_classes = [IsAdminOrReadOnly]
+    serializer_class = FullAuthorSerializer

akarpov/music/models.py

@@ -87,14 +87,14 @@ class SlugMeta:
 
 class Playlist(ShortLinkModel, UserHistoryModel):
     name = models.CharField(max_length=200)
-    private = models.BooleanField(default=False)
+    private = models.BooleanField(default=True)
     creator = models.ForeignKey(
         "users.User", related_name="playlists", on_delete=models.CASCADE
     )
     length = models.IntegerField(default=0)
 
     def get_absolute_url(self):
-        return reverse("playlist:song", kwargs={"slug": self.slug})
+        return reverse("music:playlist", kwargs={"slug": self.slug})
 
     def get_songs(self):
         return self.songs.all().values("song")

akarpov/music/signals.py

@@ -3,7 +3,7 @@
 from django.db.models.signals import post_delete, post_save, pre_save
 from django.dispatch import receiver
 
-from akarpov.music.models import Song, SongUserRating
+from akarpov.music.models import PlaylistSong, Song, SongUserRating
 
 
 @receiver(post_delete, sender=Song)
@@ -34,3 +34,27 @@ def create_or_update_rating(sender, instance: SongUserRating, **kwargs):
         else:
             song.likes -= 1
     song.save(update_fields=["likes"])
+
+
+@receiver(post_delete, sender=SongUserRating)
+def delete_rating(sender, instance: SongUserRating, **kwargs):
+    song = instance.song
+    if instance.like:
+        song.likes -= 1
+    else:
+        song.likes += 1
+    song.save(update_fields=["likes"])
+
+
+@receiver(post_save, sender=PlaylistSong)
+def update_playlist_length(sender, instance: PlaylistSong, **kwargs):
+    playlist = instance.playlist
+    playlist.length = playlist.songs.count()
+    playlist.save(update_fields=["length"])
+
+
+@receiver(post_delete, sender=PlaylistSong)
+def update_playlist_length_delete(sender, instance: PlaylistSong, **kwargs):
+    playlist = instance.playlist
+    playlist.length = playlist.songs.count()
+    playlist.save(update_fields=["length"])

akarpov/utils/models.py

@@ -26,6 +26,18 @@ def get_object_user(obj: Model) -> User | None:
     return None
 
 
+@lru_cache
+def get_model_user_field(app_name: str, model: str) -> str:
+    model = apps.get_model(app_name, model)
+    if hasattr(model, "creator") and model.creator.field.related_model is User:
+        return "creator"
+    elif hasattr(model, "user") and model.user.field.related_model is User:
+        return "user"
+    elif hasattr(model, "owner") and model.owner.field.related_model is User:
+        return "owner"
+    return ""
+
+
 @lru_cache
 def get_app_verbose_name(app: str) -> str:
     return apps.get_app_config(app).verbose_name