koel/app/Http/Controllers/API/ArtistSongController.php

<?php

namespace App\Http\Controllers\API;

use App\Http\Controllers\Controller;
use App\Http\Resources\SongResource;
use App\Models\Artist;
use App\Models\User;
use App\Repositories\SongRepository;
use Illuminate\Contracts\Auth\Authenticatable;

class ArtistSongController extends Controller
{
    /** @param User $user */
    public function __construct(
        private readonly SongRepository $songRepository,
        private readonly ?Authenticatable $user
    ) {
    }

    public function index(Artist $artist)
    {
        return SongResource::collection($this->songRepository->getByArtist($artist, $this->user));
    }
}