Generated response

Application/Abstractions/Infrastructure/IDatabase.cs

@@ -17,6 +17,10 @@ namespace Musify.Application.Abstractions.Infrastructure
 
         DbSet<Upload> Uploads { get; }
 
+        DbSet<UploadIntent> UploadIntents { get; }
+
+        Task<IDatabaseTransaction> BeginTransactionAsync(System.Data.IsolationLevel isolationLevel, CancellationToken cancellationToken);
+
         Task<int> SaveChangesAsync(CancellationToken cancellationToken);
     }
 }

Application/Abstractions/Infrastructure/IDatabaseTransaction.cs

@@ -0,0 +1,7 @@
+namespace Musify.Application.Abstractions.Infrastructure
+{
+    public interface IDatabaseTransaction : IAsyncDisposable
+    {
+        Task CommitAsync(CancellationToken cancellationToken = default);
+    }
+}

Application/Abstractions/Infrastructure/IStorageService.cs

@@ -4,6 +4,9 @@
     {
         Task<Stream> GetFileAsync(string bucket, string key, CancellationToken cancellationToken);
 
+        // Returns null if the object does not exist
+        Task<ObjectMetadata?> HeadObjectAsync(string bucket, string key, CancellationToken cancellationToken);
+
         Task<string> GetUrlAsync(string bucket, string key, TimeSpan ExpirationTime, CancellationToken cancellationToken);
 
         Task<string> GetUploadUrlAsync(string bucket, string key, string contentType, TimeSpan expirationTime, CancellationToken cancellationToken);
@@ -20,5 +23,8 @@
             CancellationToken cancellationToken);
 
         Task RemoveFolderAsync(string bucket, string folderKey, CancellationToken cancellationToken);
+
+        // Returns (key, lastModifiedUtc) for all objects under the given prefix
+        IAsyncEnumerable<(string Key, DateTime LastModifiedUtc)> ListObjectsAsync(string bucket, string prefix, CancellationToken cancellationToken);
     }
 }

Application/Abstractions/Infrastructure/ObjectMetadata.cs

@@ -0,0 +1,4 @@
+namespace Musify.Application.Abstractions.Infrastructure
+{
+    public record ObjectMetadata(string ContentType, long ContentLength);
+}