refactor(application): co-locate each command/query with its handler

One file per use case under the feature folder (Tracks/PlayLists/Users), dropping the Commands/Queries/Handlers sub-folders and their namespaces. Each file now holds the record and its handler in namespace Musify.Application.<Feature>; external usings updated accordingly. Build: 0 warnings, 0 errors.
2026-07-05 04:12:59 +02:00
parent bf3b5ceedb
commit db38740139
46 changed files with 158 additions and 309 deletions
@@ -0,0 +1,143 @@
+using ErrorOr;
+using Mediator;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+using Musify.Application.Configuration;
+using Musify.Application.Services;
+using Musify.Application.Tracks.Responses;
+using Musify.Domain.Entities;
+using Musify.Domain.ValueObjects;
+using Musify.Application.Contracts;
+
+namespace Musify.Application.Tracks
+{
+    public record RequestTrackUploadUrlsCommand(
+        long UserId,
+        string PictureFileType,
+        string PictureContentType,
+        string AudioFileType,
+        string AudioContentType,
+        long? ExpectedPictureSizeBytes = null,
+        long? ExpectedAudioSizeBytes = null)
+        : ICommand<ErrorOr<TrackUploadUrlsResponse>>;
+
+    public class RequestTrackUploadUrlsCommandHandler(
+        IDatabase database,
+        UploadIntentValidator uploadIntentValidator,
+        IStorageService storageService,
+        ILogger<RequestTrackUploadUrlsCommandHandler> logger,
+        ApplicationStorageConfiguration storageConfiguration,
+        TrackConfiguration trackConfiguration,
+        UploadIntentConfiguration uploadIntentConfiguration)
+        : ICommandHandler<RequestTrackUploadUrlsCommand, ErrorOr<TrackUploadUrlsResponse>>
+    {
+        public async ValueTask<ErrorOr<TrackUploadUrlsResponse>> Handle(RequestTrackUploadUrlsCommand request, CancellationToken cancellationToken)
+        {
+            var userExists = await database.Users
+                .AsNoTracking()
+                .AnyAsync(u => u.Id == request.UserId, cancellationToken);
+            if (!userExists)
+            {
+                logger.LogWarning("User {UserId} not found", request.UserId);
+                return Error.NotFound(description: $"User {request.UserId} not found");
+            }
+
+            var effectivePictureSize = request.ExpectedPictureSizeBytes
+                ?? uploadIntentConfiguration.DefaultExpectedPictureSizeBytes;
+            var effectiveAudioSize = request.ExpectedAudioSizeBytes
+                ?? uploadIntentConfiguration.DefaultExpectedAudioSizeBytes;
+
+            var pictureObjectName = $"{Guid.NewGuid()}.{request.PictureFileType.TrimStart('.').ToLowerInvariant()}";
+            var audioObjectName = $"{Guid.NewGuid()}.{request.AudioFileType.TrimStart('.').ToLowerInvariant()}";
+
+            var tempPictureKey = trackConfiguration.Routes.BuildTempPicturePath(
+                uploadIntentConfiguration.TemporalRootPrefix, request.UserId, pictureObjectName);
+            var tempAudioKey = trackConfiguration.Routes.BuildTempAudioPath(
+                uploadIntentConfiguration.TemporalRootPrefix, request.UserId, audioObjectName);
+
+            try
+            {
+                var expiresIn = TimeSpan.FromSeconds(uploadIntentConfiguration.UploadUrlExpiresInSeconds);
+
+                var pictureUploadUrl = await storageService.GetUploadUrlAsync(
+                    storageConfiguration.Bucket,
+                    tempPictureKey,
+                    request.PictureContentType,
+                    expiresIn,
+                    cancellationToken);
+
+                var audioUploadUrl = await storageService.GetUploadUrlAsync(
+                    storageConfiguration.Bucket,
+                    tempAudioKey,
+                    request.AudioContentType,
+                    expiresIn,
+                    cancellationToken);
+
+                var expiresAt = DateTime.UtcNow.AddSeconds(uploadIntentConfiguration.UploadUrlExpiresInSeconds);
+
+                await using var transaction = await database.BeginTransactionAsync(
+                    System.Data.IsolationLevel.Serializable, cancellationToken);
+
+                var quotaCheck = await uploadIntentValidator.CheckQuotaAsync(
+                    uploadIntentConfiguration,
+                    request.UserId, effectivePictureSize + effectiveAudioSize, 2, cancellationToken);
+                if (quotaCheck.IsError)
+                {
+                    logger.LogWarning("User {UserId} failed upload intent quota check", request.UserId);
+                    return quotaCheck.Errors;
+                }
+
+                var pictureIntent = new UploadIntent
+                {
+                    UserId = request.UserId,
+                    Bucket = storageConfiguration.Bucket,
+                    Key = tempPictureKey,
+                    ObjectName = pictureObjectName,
+                    ContentType = request.PictureContentType,
+                    ExpectedSizeBytes = effectivePictureSize,
+                    Purpose = UploadIntentPurpose.TrackPicture,
+                    ExpiresAt = expiresAt,
+                };
+
+                var audioIntent = new UploadIntent
+                {
+                    UserId = request.UserId,
+                    Bucket = storageConfiguration.Bucket,
+                    Key = tempAudioKey,
+                    ObjectName = audioObjectName,
+                    ContentType = request.AudioContentType,
+                    ExpectedSizeBytes = effectiveAudioSize,
+                    Purpose = UploadIntentPurpose.TrackAudio,
+                    ExpiresAt = expiresAt,
+                };
+
+                await database.UploadIntents.AddAsync(pictureIntent, cancellationToken);
+                await database.UploadIntents.AddAsync(audioIntent, cancellationToken);
+                await database.SaveChangesAsync(cancellationToken);
+                await transaction.CommitAsync(cancellationToken);
+
+                logger.LogInformation("Issued upload intents {PictureIntentId}/{AudioIntentId} for user {UserId} (TrackPicture/TrackAudio)",
+                    pictureIntent.Id, audioIntent.Id, request.UserId);
+
+                return new TrackUploadUrlsResponse(
+                    pictureIntent.Id,
+                    audioIntent.Id,
+                    storageConfiguration.Bucket,
+                    tempPictureKey,
+                    pictureObjectName,
+                    request.PictureContentType,
+                    pictureUploadUrl,
+                    tempAudioKey,
+                    audioObjectName,
+                    request.AudioContentType,
+                    audioUploadUrl,
+                    uploadIntentConfiguration.UploadUrlExpiresInSeconds);
+            }
+            catch (Exception exception)
+            {
+                logger.LogError(exception, "Failed to generate track upload URLs for user {UserId}", request.UserId);
+                return Error.Failure(description: "Failed to generate upload URLs");
+            }
+        }
+    }
+}