Separate responsibilities: start-listening command, API-side JSON converters, bulk track endpoints, mix kinds

backend/Core/Musify.Domain/Entities/Mix.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel.DataAnnotations;
+using Musify.Domain.ValueObjects;
 using System.ComponentModel.DataAnnotations.Schema;
 
 using Musify.Domain.Abstractions;
@@ -13,11 +14,7 @@ public class Mix : IAuditable
 
     public required long UserId { get; set; }
 
-    [MaxLength(100)]
-    public required string Title { get; set; }
-
-    [MaxLength(256)]
-    public string? Subtitle { get; set; }
+    public MixKind Kind { get; set; }
 
     public int Position { get; set; }
 

backend/Core/Musify.Domain/Entities/Track.cs

@@ -36,8 +36,6 @@ public class Track : IAuditable, IHasLifeCycle, IOwnedEntity
 
     public TrackAudio Audio { get; set; } = new();
 
-    public ICollection<UserHasTrack> UserTracks { get; set; } = new List<UserHasTrack>();
-
     public ICollection<PlayListHasTrack> PlayListTracks { get; set; } = new List<PlayListHasTrack>();
 
     public ICollection<AlbumHasTrack> AlbumTracks { get; set; } = new List<AlbumHasTrack>();

backend/Core/Musify.Domain/Entities/User.cs

@@ -30,8 +30,6 @@ public class User : IAuditable
 
     public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
 
-    public ICollection<UserHasTrack> UserTracks { get; set; } = new List<UserHasTrack>();
-
     public ICollection<PlayList> PlayLists { get; set; } = new List<PlayList>();
 
     public ICollection<ListeningHistory> ListeningHistories { get; set; } = new List<ListeningHistory>();

backend/Core/Musify.Domain/Entities/UserHasTrack.cs

@@ -1,19 +0,0 @@
-using System.ComponentModel.DataAnnotations.Schema;
-
-namespace Musify.Domain.Entities;
-
-[Table("UserHasTrack")]
-public class UserHasTrack
-{
-    public Guid Id { get; set; } = Guid.NewGuid();
-
-    public required long UserId { get; set; }
-
-    public required Guid TrackId { get; set; }
-
-    [ForeignKey(nameof(UserId))]
-    public User User { get; set; } = null!;
-
-    [ForeignKey(nameof(TrackId))]
-    public Track Track { get; set; } = null!;
-}

backend/Core/Musify.Domain/ValueObjects/MixKind.cs

@@ -0,0 +1,7 @@
+namespace Musify.Domain.ValueObjects;
+
+public enum MixKind
+{
+    Discovery = 0,
+    Daily = 1
+}