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

backend/Core/Musify.Application/Services/TrackStreamIssuer.cs

@@ -1,28 +1,20 @@
 using Musify.Application.Configuration;
 using Musify.Application.Contracts;
 using Musify.Application.Tracks.Responses;
-using Musify.Domain.Entities;
 
 namespace Musify.Application.Services;
 
+/// <summary>Builds the stream URL and signed ticket for a processed track. It never touches the database.</summary>
 public sealed class TrackStreamIssuer(
-    IDatabase database,
     IStreamTicketService ticketService,
     TrackConfiguration trackConfiguration,
     StreamGatewayConfiguration streamGatewayConfiguration,
     PlaybackConfiguration playbackConfiguration)
 {
-    public async Task<TrackStreamResponse> IssueAsync(
-        Guid trackId,
-        string audioFolderName,
-        long? userId,
-        CancellationToken cancellationToken)
+    public TrackStreamResponse Issue(string audioFolderName, long? userId, Guid? listenId)
     {
         var folderPath = trackConfiguration.Routes.BuildProcessedAudioPath(audioFolderName);
-        var keyPrefix = $"{folderPath}/";
-
-        var maxBytes = AnonymousFragmentBytes(userId);
-        var ticket = ticketService.IssueTicket(userId, keyPrefix, maxBytes);
+        var ticket = ticketService.IssueTicket(userId, $"{folderPath}/", AnonymousFragmentBytes(userId));
 
         var manifestUrl = string.Join('/',
             streamGatewayConfiguration.PublicBaseUrl.TrimEnd('/'),
@@ -30,19 +22,6 @@ public sealed class TrackStreamIssuer(
             folderPath,
             streamGatewayConfiguration.AudioFileName);
 
-        Guid? listenId = null;
-        if (userId != null)
-        {
-            var newListeningHistory = new ListeningHistory
-            {
-                UserId = userId.Value,
-                TrackId = trackId,
-            };
-            await database.ListeningHistories.AddAsync(newListeningHistory, cancellationToken);
-            await database.SaveChangesAsync(cancellationToken);
-            listenId = newListeningHistory.Id;
-        }
-
         return new TrackStreamResponse(manifestUrl, ticket.Token, ticket.ExpiresInSeconds, listenId);
     }