Add CRUD endpoints for songs, albums, artists, and playlists

app/api/v1/api.py

@@ -1,15 +1,14 @@
 from fastapi import APIRouter
 
 # Import individual routers here
-from app.api.v1.endpoints import users, auth
-# from app.api.v1.endpoints import songs, albums, artists, playlists
+from app.api.v1.endpoints import users, auth, songs, albums, artists, playlists
 
 api_router = APIRouter()
 
 # Include all routers
 api_router.include_router(users.router, prefix="/users", tags=["users"])
 api_router.include_router(auth.router, prefix="/auth", tags=["auth"])
-# api_router.include_router(songs.router, prefix="/songs", tags=["songs"])
-# api_router.include_router(albums.router, prefix="/albums", tags=["albums"])
-# api_router.include_router(artists.router, prefix="/artists", tags=["artists"])
-# api_router.include_router(playlists.router, prefix="/playlists", tags=["playlists"])
+api_router.include_router(songs.router, prefix="/songs", tags=["songs"])
+api_router.include_router(albums.router, prefix="/albums", tags=["albums"])
+api_router.include_router(artists.router, prefix="/artists", tags=["artists"])
+api_router.include_router(playlists.router, prefix="/playlists", tags=["playlists"])

app/api/v1/endpoints/albums.py

@@ -0,0 +1,123 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status, Query
+from sqlalchemy.orm import Session
+
+from app.api.deps import get_db, get_current_active_superuser
+from app.models.user import User
+from app.schemas.album import Album, AlbumCreate, AlbumUpdate
+from app.services.album import (
+    create_album,
+    delete_album,
+    get_album,
+    get_albums,
+    update_album,
+)
+from app.services.artist import get_artist
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[Album])
+def read_albums(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    artist_id: Optional[int] = Query(None, description="Filter by artist ID"),
+    search: Optional[str] = Query(None, description="Search by album title"),
+) -> Any:
+    """
+    Retrieve albums.
+    """
+    albums = get_albums(db, skip=skip, limit=limit, artist_id=artist_id, search=search)
+    return albums
+
+
+@router.post("/", response_model=Album)
+def create_new_album(
+    *,
+    db: Session = Depends(get_db),
+    album_in: AlbumCreate,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Create new album. Only superusers can create albums.
+    """
+    # Check if artist exists
+    artist = get_artist(db, artist_id=album_in.artist_id)
+    if not artist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Artist not found",
+        )
+    album = create_album(db, obj_in=album_in)
+    return album
+
+
+@router.get("/{album_id}", response_model=Album)
+def read_album(
+    *,
+    db: Session = Depends(get_db),
+    album_id: int,
+) -> Any:
+    """
+    Get album by ID.
+    """
+    album = get_album(db, album_id=album_id)
+    if not album:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Album not found",
+        )
+    return album
+
+
+@router.put("/{album_id}", response_model=Album)
+def update_album_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    album_id: int,
+    album_in: AlbumUpdate,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Update an album. Only superusers can update albums.
+    """
+    album = get_album(db, album_id=album_id)
+    if not album:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Album not found",
+        )
+    
+    # If updating artist_id, check if artist exists
+    if album_in.artist_id is not None and album_in.artist_id != album.artist_id:
+        artist = get_artist(db, artist_id=album_in.artist_id)
+        if not artist:
+            raise HTTPException(
+                status_code=status.HTTP_404_NOT_FOUND,
+                detail="Artist not found",
+            )
+    
+    album = update_album(db, db_obj=album, obj_in=album_in)
+    return album
+
+
+@router.delete("/{album_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_album_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    album_id: int,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Delete an album. Only superusers can delete albums.
+    """
+    album = get_album(db, album_id=album_id)
+    if not album:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Album not found",
+        )
+    delete_album(db, id=album_id)
+    return None

app/api/v1/endpoints/artists.py

@@ -0,0 +1,111 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status, Query
+from sqlalchemy.orm import Session
+
+from app.api.deps import get_db, get_current_active_superuser
+from app.models.user import User
+from app.schemas.artist import Artist, ArtistCreate, ArtistUpdate
+from app.services.artist import (
+    create_artist,
+    delete_artist,
+    get_artist,
+    get_artist_by_name,
+    get_artists,
+    update_artist,
+)
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[Artist])
+def read_artists(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    search: Optional[str] = Query(None, description="Search by artist name"),
+) -> Any:
+    """
+    Retrieve artists.
+    """
+    artists = get_artists(db, skip=skip, limit=limit, search=search)
+    return artists
+
+
+@router.post("/", response_model=Artist)
+def create_new_artist(
+    *,
+    db: Session = Depends(get_db),
+    artist_in: ArtistCreate,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Create new artist. Only superusers can create artists.
+    """
+    artist = get_artist_by_name(db, name=artist_in.name)
+    if artist:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="An artist with this name already exists.",
+        )
+    artist = create_artist(db, obj_in=artist_in)
+    return artist
+
+
+@router.get("/{artist_id}", response_model=Artist)
+def read_artist(
+    *,
+    db: Session = Depends(get_db),
+    artist_id: int,
+) -> Any:
+    """
+    Get artist by ID.
+    """
+    artist = get_artist(db, artist_id=artist_id)
+    if not artist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Artist not found",
+        )
+    return artist
+
+
+@router.put("/{artist_id}", response_model=Artist)
+def update_artist_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    artist_id: int,
+    artist_in: ArtistUpdate,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Update an artist. Only superusers can update artists.
+    """
+    artist = get_artist(db, artist_id=artist_id)
+    if not artist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Artist not found",
+        )
+    artist = update_artist(db, db_obj=artist, obj_in=artist_in)
+    return artist
+
+
+@router.delete("/{artist_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_artist_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    artist_id: int,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Delete an artist. Only superusers can delete artists.
+    """
+    artist = get_artist(db, artist_id=artist_id)
+    if not artist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Artist not found",
+        )
+    delete_artist(db, id=artist_id)
+    return None

app/api/v1/endpoints/playlists.py

@@ -0,0 +1,227 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status, Query
+from sqlalchemy.orm import Session
+
+from app.api.deps import get_db, get_current_active_user
+from app.models.user import User
+from app.schemas.playlist import (
+    Playlist, 
+    PlaylistCreate, 
+    PlaylistUpdate, 
+    PlaylistWithSongs,
+    PlaylistSongAdd,
+    PlaylistSongRemove
+)
+from app.services.playlist import (
+    create_playlist,
+    delete_playlist,
+    get_playlist,
+    get_playlists_by_user,
+    get_public_playlists,
+    update_playlist,
+    add_song_to_playlist,
+    remove_song_from_playlist
+)
+from app.services.song import get_song
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[Playlist])
+def read_playlists(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    search: Optional[str] = Query(None, description="Search by playlist name"),
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Retrieve user's playlists.
+    """
+    playlists = get_playlists_by_user(
+        db, 
+        user_id=current_user.id, 
+        skip=skip, 
+        limit=limit, 
+        search=search
+    )
+    return playlists
+
+
+@router.get("/public", response_model=List[Playlist])
+def read_public_playlists(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    search: Optional[str] = Query(None, description="Search by playlist name"),
+) -> Any:
+    """
+    Retrieve public playlists.
+    """
+    playlists = get_public_playlists(db, skip=skip, limit=limit, search=search)
+    return playlists
+
+
+@router.post("/", response_model=Playlist)
+def create_new_playlist(
+    *,
+    db: Session = Depends(get_db),
+    playlist_in: PlaylistCreate,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Create new playlist.
+    """
+    playlist = create_playlist(db, obj_in=playlist_in, user_id=current_user.id)
+    return playlist
+
+
+@router.get("/{playlist_id}", response_model=PlaylistWithSongs)
+def read_playlist(
+    *,
+    db: Session = Depends(get_db),
+    playlist_id: int,
+    current_user: Optional[User] = Depends(get_current_active_user),
+) -> Any:
+    """
+    Get playlist by ID with songs.
+    """
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    if not playlist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Playlist not found",
+        )
+    
+    # Check if user has access to the playlist
+    if not playlist.is_public and playlist.user_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions to access this playlist",
+        )
+    
+    return playlist
+
+
+@router.put("/{playlist_id}", response_model=Playlist)
+def update_playlist_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    playlist_id: int,
+    playlist_in: PlaylistUpdate,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Update a playlist.
+    """
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    if not playlist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Playlist not found",
+        )
+    
+    # Check if user owns the playlist
+    if playlist.user_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions to modify this playlist",
+        )
+    
+    playlist = update_playlist(db, db_obj=playlist, obj_in=playlist_in)
+    return playlist
+
+
+@router.delete("/{playlist_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_playlist_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    playlist_id: int,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Delete a playlist.
+    """
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    if not playlist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Playlist not found",
+        )
+    
+    # Check if user owns the playlist
+    if playlist.user_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions to delete this playlist",
+        )
+    
+    delete_playlist(db, id=playlist_id)
+    return None
+
+
+@router.post("/{playlist_id}/songs", response_model=PlaylistWithSongs)
+def add_song_to_playlist_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    playlist_id: int,
+    song_data: PlaylistSongAdd,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Add a song to a playlist.
+    """
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    if not playlist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Playlist not found",
+        )
+    
+    # Check if user owns the playlist
+    if playlist.user_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions to modify this playlist",
+        )
+    
+    # Check if song exists
+    song = get_song(db, song_id=song_data.song_id)
+    if not song:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Song not found",
+        )
+    
+    playlist = add_song_to_playlist(db, playlist_id=playlist_id, song_id=song_data.song_id)
+    return playlist
+
+
+@router.delete("/{playlist_id}/songs", response_model=PlaylistWithSongs)
+def remove_song_from_playlist_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    playlist_id: int,
+    song_data: PlaylistSongRemove,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Remove a song from a playlist.
+    """
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    if not playlist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Playlist not found",
+        )
+    
+    # Check if user owns the playlist
+    if playlist.user_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions to modify this playlist",
+        )
+    
+    playlist = remove_song_from_playlist(db, playlist_id=playlist_id, song_id=song_data.song_id)
+    return playlist

app/api/v1/endpoints/songs.py

@@ -0,0 +1,169 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status, Query
+from sqlalchemy.orm import Session
+
+from app.api.deps import get_db, get_current_active_superuser
+from app.models.user import User
+from app.schemas.song import Song, SongCreate, SongUpdate
+from app.services.song import (
+    create_song,
+    delete_song,
+    get_song,
+    get_songs,
+    update_song,
+)
+from app.services.artist import get_artist
+from app.services.album import get_album
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[Song])
+def read_songs(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    artist_id: Optional[int] = Query(None, description="Filter by artist ID"),
+    album_id: Optional[int] = Query(None, description="Filter by album ID"),
+    search: Optional[str] = Query(None, description="Search by song title"),
+) -> Any:
+    """
+    Retrieve songs.
+    """
+    songs = get_songs(
+        db, 
+        skip=skip, 
+        limit=limit, 
+        artist_id=artist_id, 
+        album_id=album_id, 
+        search=search
+    )
+    return songs
+
+
+@router.post("/", response_model=Song)
+def create_new_song(
+    *,
+    db: Session = Depends(get_db),
+    song_in: SongCreate,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Create new song. Only superusers can create songs.
+    """
+    # Check if artist exists
+    artist = get_artist(db, artist_id=song_in.artist_id)
+    if not artist:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Artist not found",
+        )
+    
+    # Check if album exists if album_id is provided
+    if song_in.album_id:
+        album = get_album(db, album_id=song_in.album_id)
+        if not album:
+            raise HTTPException(
+                status_code=status.HTTP_404_NOT_FOUND,
+                detail="Album not found",
+            )
+        
+        # Check if album belongs to the artist
+        if album.artist_id != song_in.artist_id:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Album doesn't belong to the specified artist",
+            )
+    
+    song = create_song(db, obj_in=song_in)
+    return song
+
+
+@router.get("/{song_id}", response_model=Song)
+def read_song(
+    *,
+    db: Session = Depends(get_db),
+    song_id: int,
+) -> Any:
+    """
+    Get song by ID.
+    """
+    song = get_song(db, song_id=song_id)
+    if not song:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Song not found",
+        )
+    return song
+
+
+@router.put("/{song_id}", response_model=Song)
+def update_song_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    song_id: int,
+    song_in: SongUpdate,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Update a song. Only superusers can update songs.
+    """
+    song = get_song(db, song_id=song_id)
+    if not song:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Song not found",
+        )
+    
+    # Check if updating artist_id and if artist exists
+    if song_in.artist_id is not None and song_in.artist_id != song.artist_id:
+        artist = get_artist(db, artist_id=song_in.artist_id)
+        if not artist:
+            raise HTTPException(
+                status_code=status.HTTP_404_NOT_FOUND,
+                detail="Artist not found",
+            )
+    
+    # Check if updating album_id and if album exists
+    if song_in.album_id is not None and song_in.album_id != song.album_id:
+        if song_in.album_id == 0:  # Remove from album
+            song_in.album_id = None
+        else:
+            album = get_album(db, album_id=song_in.album_id)
+            if not album:
+                raise HTTPException(
+                    status_code=status.HTTP_404_NOT_FOUND,
+                    detail="Album not found",
+                )
+            
+            # Check if album belongs to the artist
+            artist_id = song_in.artist_id if song_in.artist_id is not None else song.artist_id
+            if album.artist_id != artist_id:
+                raise HTTPException(
+                    status_code=status.HTTP_400_BAD_REQUEST,
+                    detail="Album doesn't belong to the song's artist",
+                )
+    
+    song = update_song(db, db_obj=song, obj_in=song_in)
+    return song
+
+
+@router.delete("/{song_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_song_endpoint(
+    *,
+    db: Session = Depends(get_db),
+    song_id: int,
+    current_user: User = Depends(get_current_active_superuser),
+) -> Any:
+    """
+    Delete a song. Only superusers can delete songs.
+    """
+    song = get_song(db, song_id=song_id)
+    if not song:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Song not found",
+        )
+    delete_song(db, id=song_id)
+    return None

app/schemas/album.py

@@ -0,0 +1,42 @@
+from typing import Optional
+from datetime import date
+from pydantic import BaseModel
+
+
+# Shared properties
+class AlbumBase(BaseModel):
+    title: Optional[str] = None
+    release_date: Optional[date] = None
+    cover_image_path: Optional[str] = None
+    description: Optional[str] = None
+    artist_id: Optional[int] = None
+
+
+# Properties to receive on album creation
+class AlbumCreate(AlbumBase):
+    title: str
+    artist_id: int
+
+
+# Properties to receive on album update
+class AlbumUpdate(AlbumBase):
+    pass
+
+
+class AlbumInDBBase(AlbumBase):
+    id: int
+    title: str
+    artist_id: int
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Album(AlbumInDBBase):
+    pass
+
+
+# Properties stored in DB
+class AlbumInDB(AlbumInDBBase):
+    pass

app/schemas/artist.py

@@ -0,0 +1,37 @@
+from typing import Optional
+from pydantic import BaseModel
+
+
+# Shared properties
+class ArtistBase(BaseModel):
+    name: Optional[str] = None
+    bio: Optional[str] = None
+    image_path: Optional[str] = None
+
+
+# Properties to receive on artist creation
+class ArtistCreate(ArtistBase):
+    name: str
+
+
+# Properties to receive on artist update
+class ArtistUpdate(ArtistBase):
+    pass
+
+
+class ArtistInDBBase(ArtistBase):
+    id: int
+    name: str
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Artist(ArtistInDBBase):
+    pass
+
+
+# Properties stored in DB
+class ArtistInDB(ArtistInDBBase):
+    pass

app/schemas/playlist.py

@@ -0,0 +1,55 @@
+from typing import Optional, List
+from pydantic import BaseModel
+
+from app.schemas.song import Song
+
+
+# Shared properties
+class PlaylistBase(BaseModel):
+    name: Optional[str] = None
+    description: Optional[str] = None
+    is_public: Optional[bool] = True
+    cover_image_path: Optional[str] = None
+
+
+# Properties to receive on playlist creation
+class PlaylistCreate(PlaylistBase):
+    name: str
+
+
+# Properties to receive on playlist update
+class PlaylistUpdate(PlaylistBase):
+    pass
+
+
+class PlaylistInDBBase(PlaylistBase):
+    id: int
+    name: str
+    user_id: int
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Playlist(PlaylistInDBBase):
+    pass
+
+
+# Properties to return with songs included
+class PlaylistWithSongs(Playlist):
+    songs: List[Song] = []
+
+
+# Properties stored in DB
+class PlaylistInDB(PlaylistInDBBase):
+    pass
+
+
+# For adding/removing songs from playlist
+class PlaylistSongAdd(BaseModel):
+    song_id: int
+
+
+class PlaylistSongRemove(BaseModel):
+    song_id: int

app/schemas/song.py

@@ -0,0 +1,44 @@
+from typing import Optional
+from pydantic import BaseModel
+
+
+# Shared properties
+class SongBase(BaseModel):
+    title: Optional[str] = None
+    duration: Optional[float] = None
+    file_path: Optional[str] = None
+    track_number: Optional[int] = None
+    artist_id: Optional[int] = None
+    album_id: Optional[int] = None
+
+
+# Properties to receive on song creation
+class SongCreate(SongBase):
+    title: str
+    file_path: str
+    artist_id: int
+
+
+# Properties to receive on song update
+class SongUpdate(SongBase):
+    pass
+
+
+class SongInDBBase(SongBase):
+    id: int
+    title: str
+    file_path: str
+    artist_id: int
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Song(SongInDBBase):
+    pass
+
+
+# Properties stored in DB
+class SongInDB(SongInDBBase):
+    pass

app/services/album.py

@@ -0,0 +1,61 @@
+from typing import List, Optional, Union, Dict, Any
+from sqlalchemy.orm import Session
+
+from app.models.album import Album
+from app.schemas.album import AlbumCreate, AlbumUpdate
+
+
+def get_album(db: Session, album_id: int) -> Optional[Album]:
+    return db.query(Album).filter(Album.id == album_id).first()
+
+
+def get_albums(
+    db: Session, 
+    skip: int = 0, 
+    limit: int = 100, 
+    artist_id: Optional[int] = None,
+    search: Optional[str] = None
+) -> List[Album]:
+    query = db.query(Album)
+    if artist_id:
+        query = query.filter(Album.artist_id == artist_id)
+    if search:
+        query = query.filter(Album.title.ilike(f"%{search}%"))
+    return query.offset(skip).limit(limit).all()
+
+
+def create_album(db: Session, obj_in: AlbumCreate) -> Album:
+    db_obj = Album(
+        title=obj_in.title,
+        release_date=obj_in.release_date,
+        cover_image_path=obj_in.cover_image_path,
+        description=obj_in.description,
+        artist_id=obj_in.artist_id,
+    )
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def update_album(
+    db: Session, *, db_obj: Album, obj_in: Union[AlbumUpdate, Dict[str, Any]]
+) -> Album:
+    if isinstance(obj_in, dict):
+        update_data = obj_in
+    else:
+        update_data = obj_in.dict(exclude_unset=True)
+    for field in update_data:
+        if hasattr(db_obj, field):
+            setattr(db_obj, field, update_data[field])
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def delete_album(db: Session, *, id: int) -> None:
+    album = db.query(Album).get(id)
+    if album:
+        db.delete(album)
+        db.commit()

app/services/artist.py

@@ -0,0 +1,57 @@
+from typing import List, Optional, Union, Dict, Any
+from sqlalchemy.orm import Session
+
+from app.models.artist import Artist
+from app.schemas.artist import ArtistCreate, ArtistUpdate
+
+
+def get_artist(db: Session, artist_id: int) -> Optional[Artist]:
+    return db.query(Artist).filter(Artist.id == artist_id).first()
+
+
+def get_artist_by_name(db: Session, name: str) -> Optional[Artist]:
+    return db.query(Artist).filter(Artist.name == name).first()
+
+
+def get_artists(
+    db: Session, skip: int = 0, limit: int = 100, search: Optional[str] = None
+) -> List[Artist]:
+    query = db.query(Artist)
+    if search:
+        query = query.filter(Artist.name.ilike(f"%{search}%"))
+    return query.offset(skip).limit(limit).all()
+
+
+def create_artist(db: Session, obj_in: ArtistCreate) -> Artist:
+    db_obj = Artist(
+        name=obj_in.name,
+        bio=obj_in.bio,
+        image_path=obj_in.image_path,
+    )
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def update_artist(
+    db: Session, *, db_obj: Artist, obj_in: Union[ArtistUpdate, Dict[str, Any]]
+) -> Artist:
+    if isinstance(obj_in, dict):
+        update_data = obj_in
+    else:
+        update_data = obj_in.dict(exclude_unset=True)
+    for field in update_data:
+        if hasattr(db_obj, field):
+            setattr(db_obj, field, update_data[field])
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def delete_artist(db: Session, *, id: int) -> None:
+    artist = db.query(Artist).get(id)
+    if artist:
+        db.delete(artist)
+        db.commit()

app/services/playlist.py

@@ -0,0 +1,100 @@
+from typing import List, Optional, Union, Dict, Any
+from sqlalchemy.orm import Session
+
+from app.models.playlist import Playlist
+from app.models.song import Song
+from app.schemas.playlist import PlaylistCreate, PlaylistUpdate
+
+
+def get_playlist(db: Session, playlist_id: int) -> Optional[Playlist]:
+    return db.query(Playlist).filter(Playlist.id == playlist_id).first()
+
+
+def get_playlists_by_user(
+    db: Session, 
+    user_id: int, 
+    skip: int = 0, 
+    limit: int = 100,
+    search: Optional[str] = None
+) -> List[Playlist]:
+    query = db.query(Playlist).filter(Playlist.user_id == user_id)
+    if search:
+        query = query.filter(Playlist.name.ilike(f"%{search}%"))
+    return query.offset(skip).limit(limit).all()
+
+
+def get_public_playlists(
+    db: Session, 
+    skip: int = 0, 
+    limit: int = 100,
+    search: Optional[str] = None
+) -> List[Playlist]:
+    query = db.query(Playlist).filter(Playlist.is_public.is_(True))
+    if search:
+        query = query.filter(Playlist.name.ilike(f"%{search}%"))
+    return query.offset(skip).limit(limit).all()
+
+
+def create_playlist(db: Session, obj_in: PlaylistCreate, user_id: int) -> Playlist:
+    db_obj = Playlist(
+        name=obj_in.name,
+        description=obj_in.description,
+        is_public=obj_in.is_public,
+        cover_image_path=obj_in.cover_image_path,
+        user_id=user_id,
+    )
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def update_playlist(
+    db: Session, *, db_obj: Playlist, obj_in: Union[PlaylistUpdate, Dict[str, Any]]
+) -> Playlist:
+    if isinstance(obj_in, dict):
+        update_data = obj_in
+    else:
+        update_data = obj_in.dict(exclude_unset=True)
+    for field in update_data:
+        if hasattr(db_obj, field):
+            setattr(db_obj, field, update_data[field])
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def delete_playlist(db: Session, *, id: int) -> None:
+    playlist = db.query(Playlist).get(id)
+    if playlist:
+        db.delete(playlist)
+        db.commit()
+
+
+def add_song_to_playlist(db: Session, *, playlist_id: int, song_id: int) -> Playlist:
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    song = db.query(Song).filter(Song.id == song_id).first()
+    
+    if playlist and song:
+        # Check if song is already in playlist
+        if song not in playlist.songs:
+            playlist.songs.append(song)
+            db.commit()
+            db.refresh(playlist)
+    
+    return playlist
+
+
+def remove_song_from_playlist(db: Session, *, playlist_id: int, song_id: int) -> Playlist:
+    playlist = get_playlist(db, playlist_id=playlist_id)
+    song = db.query(Song).filter(Song.id == song_id).first()
+    
+    if playlist and song:
+        # Check if song is in playlist
+        if song in playlist.songs:
+            playlist.songs.remove(song)
+            db.commit()
+            db.refresh(playlist)
+    
+    return playlist

app/services/song.py

@@ -0,0 +1,65 @@
+from typing import List, Optional, Union, Dict, Any
+from sqlalchemy.orm import Session
+
+from app.models.song import Song
+from app.schemas.song import SongCreate, SongUpdate
+
+
+def get_song(db: Session, song_id: int) -> Optional[Song]:
+    return db.query(Song).filter(Song.id == song_id).first()
+
+
+def get_songs(
+    db: Session, 
+    skip: int = 0, 
+    limit: int = 100, 
+    artist_id: Optional[int] = None,
+    album_id: Optional[int] = None,
+    search: Optional[str] = None
+) -> List[Song]:
+    query = db.query(Song)
+    if artist_id:
+        query = query.filter(Song.artist_id == artist_id)
+    if album_id:
+        query = query.filter(Song.album_id == album_id)
+    if search:
+        query = query.filter(Song.title.ilike(f"%{search}%"))
+    return query.offset(skip).limit(limit).all()
+
+
+def create_song(db: Session, obj_in: SongCreate) -> Song:
+    db_obj = Song(
+        title=obj_in.title,
+        duration=obj_in.duration,
+        file_path=obj_in.file_path,
+        track_number=obj_in.track_number,
+        artist_id=obj_in.artist_id,
+        album_id=obj_in.album_id,
+    )
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def update_song(
+    db: Session, *, db_obj: Song, obj_in: Union[SongUpdate, Dict[str, Any]]
+) -> Song:
+    if isinstance(obj_in, dict):
+        update_data = obj_in
+    else:
+        update_data = obj_in.dict(exclude_unset=True)
+    for field in update_data:
+        if hasattr(db_obj, field):
+            setattr(db_obj, field, update_data[field])
+    db.add(db_obj)
+    db.commit()
+    db.refresh(db_obj)
+    return db_obj
+
+
+def delete_song(db: Session, *, id: int) -> None:
+    song = db.query(Song).get(id)
+    if song:
+        db.delete(song)
+        db.commit()