A lot of changes

Application/Application.csproj

@@ -24,4 +24,8 @@
     <ProjectReference Include="..\Domain\Domain.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Tracks\Queries\" />
+  </ItemGroup>
+
 </Project>

Application/Configuration/ConfigurationDependencyInjection.cs

@@ -10,7 +10,8 @@ namespace Musify.Application.Configuration
         {
             serviceDescriptors
                 .AddValidatedConfiguration<ApplicationStorageConfiguration>(configuration, ApplicationStorageConfiguration.SectionName)
-                .AddValidatedConfiguration<PlayListConfiguration>(configuration, PlayListConfiguration.SectionName);
+                .AddValidatedConfiguration<PlayListConfiguration>(configuration, PlayListConfiguration.SectionName)
+                .AddValidatedConfiguration<TrackConfiguration>(configuration, TrackConfiguration.SectionName);
 
             return serviceDescriptors;
         }

Application/Configuration/PlayListConfiguration.cs

@@ -7,14 +7,17 @@ namespace Musify.Application.Configuration
         public const string SectionName = "PlayListConfiguration";
 
         [Required]
-        public Routes Routes { get; set; } = new Routes();
+        public PlayListRoutes Routes { get; set; } = new PlayListRoutes();
 
         [Required]
-        public PicturesSizes PicturesSizes { get; set; } = new PicturesSizes();
+        public PlayListPicturesSizes PicturesSizes { get; set; } = new PlayListPicturesSizes();
     }
 
-    public class Routes
+    public class PlayListRoutes
     {
+        [Required]
+        public string ParentFolders { get; set; } = "PlayLists";
+
         [Required]
         public string OriginalPictures { get; set; } = "OriginalPictures";
 
@@ -37,7 +40,7 @@ namespace Musify.Application.Configuration
         public string PresetLargePicture { get; set; } = "PresetLargePicture.webp";
     }
 
-    public class PicturesSizes
+    public class PlayListPicturesSizes
     {
         [Range(1, 1024)]
         public int SmallPictureWidth { get; set; } = 128;

Application/Configuration/TrackConfiguration.cs

@@ -0,0 +1,63 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Musify.Application.Configuration
+{
+    public class TrackConfiguration
+    {
+        public const string SectionName = "TrackConfiguration";
+
+        [Required]
+        public TrackRoutes Routes { get; set; } = new TrackRoutes();
+
+        [Required]
+        public TrackPicturesSizes PicturesSizes { get; set; } = new TrackPicturesSizes();
+    }
+
+    public class TrackRoutes
+    {
+        [Required]
+        public string ParentFolder { get; set; } = "Tracks";
+
+        [Required]
+        public string OriginalPictures { get; set; } = "OriginalTracks";
+
+        [Required]
+        public string SmallPictures { get; set; } = "SmallTracks";
+
+        [Required]
+        public string MediumPictures { get; set; } = "MediumTracks";
+
+        [Required]
+        public string LargePictures { get; set; } = "LargeTracks";
+
+        [Required]
+        public string PresetSmallPicture { get; set; } = "PresetSmallPicture.webp";
+
+        [Required]
+        public string PresetMediumPicture { get; set; } = "PresetMediumPicture.webp";
+
+        [Required]
+        public string PresetLargePicture { get; set; } = "PresetLargePicture.webp";
+    }
+
+    public class TrackPicturesSizes
+    {
+        [Range(1, 1024)]
+        public int SmallPictureWidth { get; set; } = 128;
+
+        [Range(1, 1024)]
+        public int SmallPictureHeight { get; set; } = 128;
+
+        [Range(1, 1024)]
+        public int MediumPictureWidth { get; private set; } = 256;
+
+        [Range(1, 1024)]
+        public int MediumPictureHeight { get; private set; } = 256;
+
+        [Range(1, 1024)]
+        public int LargePictureWidth { get; private set; } = 512;
+
+        [Range(1, 1024)]
+        public int LargePictureHeight { get; private set; } = 512;
+    }
+}

Application/Contracts/Infrastructure/IDatabase.cs

@@ -11,6 +11,8 @@ namespace Musify.Application.Contracts.Infrastructure
 
         DbSet<Track> Tracks { get; }
 
+        DbSet<UserHasTrack> UserHasTracks { get; }
+
         DbSet<PlayListHasTrack> PlayListHasTracks { get; }
 
         DbSet<Upload> Uploads { get; }

Application/Events/ProcessTrackEvent.cs

@@ -0,0 +1,4 @@
+namespace Musify.Application.Events
+{
+    public record ProcessTrackEvent();
+}

Application/Events/RemoveFileEvent.cs

@@ -1,6 +1,4 @@
-using Musify.Application.Contracts.Application;
+namespace Musify.Application.Events
-
-namespace Musify.Application.Events
 {
     public record RemoveFileEvent(
         string BucketName,

Application/Events/UpdateTrackPictureEvent.cs

@@ -0,0 +1,16 @@
+namespace Musify.Application.Events
+{
+    public record UpdateTrackPictureEvent(
+        Guid TrackId,
+        string BucketName,
+        string OriginalPictureKeyName,
+        string SmallPictureKeyName,
+        int SmallPictureWidth,
+        int SmallPictureHeight,
+        string MediumPictureKeyName,
+        int MediumPictureWidth,
+        int MediumPictureHeight,
+        string LargePictureKeyName,
+        int LargePictureWidth,
+        int LargePictureHeight);
+}

Application/PlayLists/Commands/CreatePlayList/CreatePlayListCommandHandler.cs

@@ -10,9 +10,8 @@ using Musify.Domain.Entities;
 
 namespace Musify.Application.PlayLists.Commands.CreatePlayList
 {
-    public class CreatePlayListCommandHandler(IEventBus eventBus, IDatabase database, IStorageHandler storageHandler,
+    public class CreatePlayListCommandHandler(IEventBus eventBus, IDatabase database, IStorageHandler storageHandler, IPictureHandler pictureHandler,
-        ILogger<CreatePlayListCommandHandler> logger, ApplicationStorageConfiguration storageConfiguration,
+        ILogger<CreatePlayListCommandHandler> logger, ApplicationStorageConfiguration storageConfiguration, PlayListConfiguration playListConfiguration)
-        PlayListConfiguration playListConfiguration, IPictureHandler pictureHandler)
         : IRequestHandler<CreatePlayListCommand, Task<Result<PlayListResponse>> >
     {
         public async Task<Result<PlayListResponse>> Handle(CreatePlayListCommand request, CancellationToken cancellationToken)
@@ -55,8 +54,6 @@ namespace Musify.Application.PlayLists.Commands.CreatePlayList
                         playList.Id, string.Join("; ", uploadResult.Errors));
                     return Result.Error($"Failed to upload picture for PlayList with Id {playList.Id} to storage.");
                 }
-
-                playList.OriginalPictureKeyName = pictureName;
                 logger.LogInformation("Playlist image uploaded successfully for PlayList with Id={PlayListId}.", playList.Id);
 
                 var smallPictureKeyName = Path.Combine(

Application/PlayLists/Commands/DeletePlayList/DeletePlayListCommandHandler.cs

@@ -27,23 +27,16 @@ namespace Musify.Application.PlayLists.Commands.DeletePlayList
                 return Result.Unauthorized();
             }
 
-            if (!string.IsNullOrWhiteSpace(playList.OriginalPictureKeyName))
+            var keysToRemove = new List<string>();
-            {
-                var keysToRemove = new List<string>
-                {
-                    Path.Join(playListConfiguration.Routes.OriginalPictures, playList.OriginalPictureKeyName)
-                };
 
             if (playList.SmallPictureKeyName != playListConfiguration.Routes.PresetSmallPicture)
             {
                 keysToRemove.Add(playList.SmallPictureKeyName);
             }
-
             if (playList.MediumPictureKeyName != playListConfiguration.Routes.PresetMediumPicture)
             {
                 keysToRemove.Add(playList.MediumPictureKeyName);
             }
-
             if (playList.LargePictureKeyName != playListConfiguration.Routes.PresetLargePicture)
             {
                 keysToRemove.Add(playList.LargePictureKeyName);
@@ -58,7 +51,6 @@ namespace Musify.Application.PlayLists.Commands.DeletePlayList
                     return publishResult;
                 }
             }
-            }
 
             database.PlayLists.Remove(playList);
             await database.SaveChangesAsync(cancellationToken);

Application/PlayLists/Commands/UpdatePlayList/UpdatePlayListCommandHandler.cs

@@ -47,25 +47,6 @@ namespace Musify.Application.PlayLists.Commands.UpdatePlayList
                 return Result.Success(PlayListResponse.FromEntity(playList));
             }
 
-            if (!string.IsNullOrWhiteSpace(playList.OriginalPictureKeyName))
-            {
-                var originalImageStorageKey = Path.Join(playListConfiguration.Routes.OriginalPictures, playList.OriginalPictureKeyName);
-
-                try
-                {
-                    await eventBus.PublishAsync(new RemoveFileEvent(
-                       storageConfiguration.BucketName,
-                       originalImageStorageKey), cancellationToken);
-                }
-                catch (Exception exception)
-                {
-                    logger.LogError(exception, "Failed to publish remove file event for original picture of PlayList id={PlayListId}.", playList.Id);
-                    return Result.Error($"Failed to publish remove file event for PlayList with id {playList.Id}.");
-                }
-
-                logger.LogInformation("Published event to remove old picture with key name {KeyName} from bucket {BucketName}",
-                    originalImageStorageKey, storageConfiguration.BucketName);
-
             if (playList.SmallPictureKeyName != playListConfiguration.Routes.PresetSmallPicture)
             {
                 try
@@ -80,7 +61,6 @@ namespace Musify.Application.PlayLists.Commands.UpdatePlayList
                     return Result.Error($"Failed to publish remove file event for PlayList with id {playList.Id}.");
                 }
             }
-
             if (playList.MediumPictureKeyName != playListConfiguration.Routes.PresetMediumPicture)
             {
                 try
@@ -95,7 +75,6 @@ namespace Musify.Application.PlayLists.Commands.UpdatePlayList
                     return Result.Error($"Failed to publish remove file event for PlayList with id {playList.Id}.");
                 }
             }
-
             if (playList.LargePictureKeyName != playListConfiguration.Routes.PresetLargePicture)
             {
                 try
@@ -110,7 +89,6 @@ namespace Musify.Application.PlayLists.Commands.UpdatePlayList
                     return Result.Error($"Failed to publish remove file event for PlayList with id {playList.Id}.");
                 }
             }
-            }
 
             var newImageId = Guid.NewGuid();
             var pictureName = $"{newImageId}{request.NewPicture.FileType}";
@@ -130,8 +108,6 @@ namespace Musify.Application.PlayLists.Commands.UpdatePlayList
                 return Result.Error($"Failed to upload picture for PlayList with Id {playList.Id} to storage.");
             }
 
-            playList.OriginalPictureKeyName = pictureName;
-
             var smallPictureKeyName = Path.Combine(
                 playListConfiguration.Routes.SmallPictures,
                 $"{playList.Id}.{pictureHandler.FileExtension}");

Application/Tracks/Commands/CreateTrack/CreateTrackCommand.cs

@@ -0,0 +1,14 @@
+using Ardalis.Result;
+using DispatchR.Abstractions.Send;
+using Musify.Application.Contracts.Application;
+using Musify.Application.Tracks.Contracts;
+
+namespace Musify.Application.Tracks.Commands.CreateTrack
+{
+    public record CreateTrackCommand(
+        Guid UserId,
+        string Title,
+        IFileData Picture,
+        IFileData Audio)
+        : IRequest<CreateTrackCommand, Task<Result<TrackResponse> >>;
+}

Application/Tracks/Commands/CreateTrack/CreateTrackCommandHandler.cs

@@ -0,0 +1,87 @@
+using Ardalis.Result;
+using DispatchR.Abstractions.Send;
+using Microsoft.Extensions.Logging;
+using Musify.Application.Configuration;
+using Musify.Application.Contracts.Infrastructure;
+using Musify.Application.Events;
+using Musify.Application.Tracks.Contracts;
+using Musify.Domain.Entities;
+
+namespace Musify.Application.Tracks.Commands.CreateTrack
+{
+    public class CreateTrackCommandHandler(IDatabase database, IPictureHandler pictureHandler, IEventBus eventBus, IStorageHandler storageHandler,
+        ILogger<CreateTrackCommandHandler> logger, ApplicationStorageConfiguration storageConfiguration, TrackConfiguration trackConfiguration)
+        : IRequestHandler<CreateTrackCommand, Task<Result<TrackResponse> >>
+    {
+        public async Task<Result<TrackResponse>> Handle(CreateTrackCommand request, CancellationToken cancellationToken)
+        {
+            var userExists = await database.Users.FindAsync(request.UserId, cancellationToken);
+
+            if (userExists is null)
+            {
+                logger.LogWarning("User with id {UserId} not found", request.UserId);
+                return Result.NotFound($"User with id {request.UserId} not found");
+            }
+
+            var originalPictureKeyName = $"{Guid.NewGuid() }.{request.Picture.FileType}";
+            var track = new Track
+            {
+                Title = request.Title,
+                NormalizedTitle = request.Title.Trim().ToUpperInvariant(),
+                SmallPictureKeyName = trackConfiguration.Routes.PresetSmallPicture,
+                MediumPictureKeyName = trackConfiguration.Routes.PresetMediumPicture,
+                LargePictureKeyName = trackConfiguration.Routes.PresetLargePicture,
+            };
+
+            var pictureUploadResult = await storageHandler.UploadFileAsync(
+                request.Picture.FileStream,
+                request.Picture.ContentType,
+                storageConfiguration.BucketName,
+                originalPictureKeyName,
+                cancellationToken);
+
+            if (!pictureUploadResult.IsSuccess)
+            {
+                logger.LogError("Failed to upload picture for track {TrackTitle}", request.Title);
+                return Result.Error($"Failed to upload picture for track {request.Title}");
+            }
+
+            var smallPictureKeyName = Path.Combine(
+                trackConfiguration.Routes.SmallPictures,
+                $"{track.Id}.{pictureHandler.FileExtension}");
+            var mediumPictureKeyName = Path.Combine(
+                trackConfiguration.Routes.MediumPictures,
+                $"{track.Id}.{pictureHandler.FileExtension}");
+            var largePictureKeyName = Path.Combine(
+                trackConfiguration.Routes.LargePictures,
+                $"{track.Id}.{pictureHandler.FileExtension}");
+
+            try
+            {
+                await eventBus.PublishAsync(new UpdatePlayListPictureEvent(
+                    track.Id,
+                    storageConfiguration.BucketName,
+                    originalPictureKeyName,
+                    smallPictureKeyName,
+                    trackConfiguration.PicturesSizes.SmallPictureWidth,
+                    trackConfiguration.PicturesSizes.SmallPictureHeight,
+                    mediumPictureKeyName,
+                    trackConfiguration.PicturesSizes.MediumPictureWidth,
+                    trackConfiguration.PicturesSizes.MediumPictureHeight,
+                    largePictureKeyName,
+                    trackConfiguration.PicturesSizes.LargePictureWidth,
+                    trackConfiguration.PicturesSizes.LargePictureHeight), cancellationToken);
+            }
+            catch (Exception exception)
+            {
+                logger.LogError(exception, "Failed to publish resize picture event for Track with id={TrackId}.", track.Id);
+                return Result.Error($"Failed to publish resize picture event for Track with id {track.Id}.");
+            }
+
+            await database.Tracks.AddAsync(track, cancellationToken);
+            await database.SaveChangesAsync(cancellationToken);
+
+            return Result.Success();
+        }
+    }
+}

Application/Tracks/Contracts/TrackResponse.cs

@@ -0,0 +1,20 @@
+using Musify.Domain.Entities;
+
+namespace Musify.Application.Tracks.Contracts
+{
+    public record TrackResponse(
+        Guid Id,
+        string Title,
+        DateTime CreatedDate,
+        DateTime UpdatedDate)
+    {
+        public static TrackResponse FromEntity(Track track)
+        {
+            return new TrackResponse(
+                track.Id,
+                track.Title,
+                track.CreatedDate,
+                track.UpdatedDate);
+        }
+    }
+}

Domain/Entities/PlayList.cs

@@ -25,9 +25,6 @@ namespace Musify.Domain.Entities
         [MaxLength(254)]
         public required string Description { get; set; } = "No description was provided.";
 
-        [MaxLength(64)]
-        public string? OriginalPictureKeyName { get; set; }
-
         [Required]
         [MaxLength(64)]
         public required string SmallPictureKeyName { get; set; }

Domain/Entities/Track.cs

@@ -18,7 +18,15 @@ namespace Musify.Domain.Entities
 
         [Required]
         [MaxLength(64)]
-        public required string ImageName { get; set; }
+        public required string SmallPictureKeyName { get; set; }
+
+        [Required]
+        [MaxLength(64)]
+        public required string MediumPictureKeyName { get; set; }
+
+        [Required]
+        [MaxLength(64)]
+        public required string LargePictureKeyName { get; set; }
 
         [Required]
         public DateTime CreatedDate { get; set; } = DateTime.UtcNow;
@@ -26,7 +34,7 @@ namespace Musify.Domain.Entities
         [Required]
         public DateTime UpdatedDate { get; set; } = DateTime.UtcNow;
 
-        public ICollection<User> Users { get; set; } = new List<User>();
+        public ICollection<UserHasTrack> UserTracks { get; set; } = new List<UserHasTrack>();
 
         public ICollection<PlayListHasTrack> PlayListTracks { get; set; } = new List<PlayListHasTrack>();
     }

Domain/Entities/User.cs

@@ -15,7 +15,7 @@ namespace Musify.Domain.Entities
         [Required]
         public DateTime UpdatedAt { get; set; } = DateTime.Now;
 
-        public ICollection<Track> Tracks { get; set; } = new List<Track>();
+        public ICollection<UserHasTrack> UserTracks { get; set; } = new List<UserHasTrack>();
 
         public ICollection<PlayList> PlayLists { get; set; } = new List<PlayList>();
     }

Domain/Entities/UserHasTrack.cs

@@ -0,0 +1,24 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Musify.Domain.Entities
+{
+#pragma warning disable CS8618
+    [Table("UserHasTrack")]
+    public class UserHasTrack
+    {
+        public Guid Id { get; set; } = Guid.NewGuid();
+
+        [Required]
+        public required Guid UserId { get; set; }
+
+        [Required]
+        public required Guid TrackId { get; set; }
+
+        [ForeignKey(nameof(UserId)) ]
+        public User User { get; set; }
+
+        [ForeignKey(nameof(TrackId)) ]
+        public Track Track { get; set; }
+    }
+}

Infrastructure/Messaging/Activities/Arguments/UpdateTrackPictureArguments.cs

@@ -0,0 +1,8 @@
+namespace Musify.Infrastructure.Messaging.Activities.Arguments
+{
+    public record UpdateTrackPictureArguments(
+        Guid TrackId,
+        string SmallPictureKeyName,
+        string MediumPictureKeyName,
+        string LargePictureKeyName);
+}

Infrastructure/Messaging/Activities/UpdateTrackPictureActivity.cs

@@ -0,0 +1,53 @@
+using MassTransit;
+using Musify.Application.Contracts.Infrastructure;
+using Musify.Domain.Entities;
+using Musify.Infrastructure.Messaging.Activities.Arguments;
+
+namespace Musify.Infrastructure.Messaging.Activities
+{
+    public class UpdateTrackPictureActivity(IDatabase database, IProcessTrackingStore processTrackingStore)
+        : IExecuteActivity<UpdateTrackPictureArguments>
+    {
+        public const string ExecuteEndpointName = "Update-Track-Picture";
+
+        public async Task<ExecutionResult> Execute(ExecuteContext<UpdateTrackPictureArguments> executeContext)
+        {
+            var processId = await processTrackingStore.GetOrCreateProcessAsync(
+                "RoutingSlip",
+                executeContext.CorrelationId ?? executeContext.TrackingNumber,
+                executeContext.ConversationId,
+                executeContext.MessageId,
+                executeContext.CancellationToken);
+
+            var stepId = await processTrackingStore.StartStepAsync(
+                processId,
+                nameof(UpdateTrackPictureActivity),
+                ProcessStepComponentType.Activity,
+                0,
+                executeContext.CancellationToken);
+
+            try
+            {
+                var track = await database.Tracks.FindAsync(executeContext.Arguments.TrackId, executeContext.CancellationToken);
+
+                if (track is null)
+                    throw new Exception($"Track with id {executeContext.Arguments.TrackId} not found.");
+
+                track.SmallPictureKeyName = executeContext.Arguments.SmallPictureKeyName;
+                track.MediumPictureKeyName = executeContext.Arguments.MediumPictureKeyName;
+                track.LargePictureKeyName = executeContext.Arguments.LargePictureKeyName;
+
+                database.Tracks.Update(track);
+                await database.SaveChangesAsync(executeContext.CancellationToken);
+
+                await processTrackingStore.CompleteStepAsync(processId, stepId, executeContext.CancellationToken);
+                return executeContext.Completed();
+            }
+            catch (Exception exception)
+            {
+                await processTrackingStore.FailStepAsync(processId, stepId, exception.Message, executeContext.CancellationToken);
+                throw;
+            }
+        }
+    }
+}

Infrastructure/Messaging/Consumers/UpdatePlayListPictureConsumer.cs

@@ -44,7 +44,10 @@ namespace Musify.Infrastructure.Messaging.Consumers
             routingSlipBuilder.AddActivity(
                 "DeleteOriginal",
                 BuildExecuteUri(RemoveFilesActivity.ExecuteEndpointName),
-                new RemoveFileArguments(consumeContext.Message.BucketName, consumeContext.Message.OriginalPictureKeyName));
+                new RemoveFileArguments(
+                    consumeContext.Message.BucketName,
+                    consumeContext.Message.OriginalPictureKeyName)
+                );
 
             routingSlipBuilder.AddActivity(
                 "UpdatePlayListPicture",

Infrastructure/Messaging/Consumers/UpdateTrackPictureConsumer.cs

@@ -0,0 +1,88 @@
+using MassTransit;
+using Musify.Application.Events;
+using Musify.Infrastructure.Messaging.Activities;
+using Musify.Infrastructure.Messaging.Activities.Arguments;
+
+namespace Musify.Infrastructure.Messaging.Consumers
+{
+    public class UpdateTrackPictureConsumer(IBus bus)
+        : IConsumer<UpdateTrackPictureEvent>
+    {
+        public const string QueueName = "update-track-picture";
+
+        public async Task Consume(ConsumeContext<UpdateTrackPictureEvent> consumeContext)
+        {
+            var routingSlipBuilder = new RoutingSlipBuilder(NewId.NextGuid());
+
+            AddResizeActivity(
+                routingSlipBuilder,
+                "ResizeSmall",
+                consumeContext.Message.SmallPictureKeyName,
+                consumeContext.Message.SmallPictureWidth,
+                consumeContext.Message.SmallPictureHeight,
+                consumeContext.Message.OriginalPictureKeyName,
+                consumeContext.Message.BucketName);
+
+            AddResizeActivity(
+                routingSlipBuilder,
+                "ResizeMedium",
+                consumeContext.Message.SmallPictureKeyName,
+                consumeContext.Message.MediumPictureWidth,
+                consumeContext.Message.MediumPictureHeight,
+                consumeContext.Message.OriginalPictureKeyName,
+                consumeContext.Message.BucketName);
+
+            AddResizeActivity(
+                routingSlipBuilder,
+                "ResizeMedium",
+                consumeContext.Message.SmallPictureKeyName,
+                consumeContext.Message.LargePictureWidth,
+                consumeContext.Message.LargePictureHeight,
+                consumeContext.Message.OriginalPictureKeyName,
+                consumeContext.Message.BucketName);
+
+            routingSlipBuilder.AddActivity(
+                "DeleteOriginal",
+                BuildExecuteUri(RemoveFilesActivity.ExecuteEndpointName),
+                new RemoveFileArguments(
+                    consumeContext.Message.BucketName,
+                    consumeContext.Message.OriginalPictureKeyName)
+                );
+
+            routingSlipBuilder.AddActivity(
+                "UpdateTrackPictureActivity",
+                BuildExecuteUri(UpdateTrackPictureActivity.ExecuteEndpointName),
+                new UpdateTrackPictureArguments(
+                    consumeContext.Message.TrackId,
+                    consumeContext.Message.SmallPictureKeyName,
+                    consumeContext.Message.MediumPictureKeyName,
+                    consumeContext.Message.LargePictureKeyName));
+
+            var routingSlip = routingSlipBuilder.Build();
+            await bus.Execute(routingSlip);
+        }
+
+        void AddResizeActivity(
+            RoutingSlipBuilder routingSlipBuilder,
+            string activityName,
+            string destinationKeyName,
+            int width,
+            int height,
+            string originalPictureKeyName,
+            string bucketName)
+        {
+            routingSlipBuilder.AddActivity(
+                activityName,
+                BuildExecuteUri(ResizePictureActivity.ExecuteEndpointName),
+                new ResizePictureArgument(
+                    bucketName,
+                    originalPictureKeyName,
+                    bucketName,
+                    destinationKeyName,
+                    width,
+                    height));
+        }
+
+        static Uri BuildExecuteUri(string endpointName) => new($"queue:{endpointName}_execute");
+    }
+}

Infrastructure/Persistence/Database.cs

@@ -19,6 +19,8 @@ namespace Musify.Infrastructure.Persistence
 
         public DbSet<PlayList> PlayLists => Set<PlayList>();
 
+        public DbSet<UserHasTrack> UserHasTracks => Set<UserHasTrack>();
+
         public DbSet<PlayListHasTrack> PlayListHasTracks => Set<PlayListHasTrack>();
 
         public DbSet<Upload> Uploads => Set<Upload>();