[FA-misc] Initial MassTransit implementation seems to work

FictionArchive.Service.FileService/Consumers/FileUploadRequestCreatedConsumer.cs

@@ -0,0 +1,74 @@
+using Amazon.S3;
+using Amazon.S3.Model;
+using FictionArchive.Common.Enums;
+using FictionArchive.Service.FileService.Contracts;
+using FictionArchive.Service.FileService.Models;
+using FictionArchive.Service.Shared.Contracts.Events;
+using MassTransit;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace FictionArchive.Service.FileService.Consumers;
+
+public class FileUploadRequestCreatedConsumer : IConsumer<IFileUploadRequestCreated>
+{
+    private readonly ILogger<FileUploadRequestCreatedConsumer> _logger;
+    private readonly AmazonS3Client _amazonS3Client;
+    private readonly IPublishEndpoint _publishEndpoint;
+    private readonly S3Configuration _s3Configuration;
+    private readonly ProxyConfiguration _proxyConfiguration;
+
+    public FileUploadRequestCreatedConsumer(
+        ILogger<FileUploadRequestCreatedConsumer> logger,
+        AmazonS3Client amazonS3Client,
+        IPublishEndpoint publishEndpoint,
+        IOptions<S3Configuration> s3Configuration,
+        IOptions<ProxyConfiguration> proxyConfiguration)
+    {
+        _logger = logger;
+        _amazonS3Client = amazonS3Client;
+        _publishEndpoint = publishEndpoint;
+        _s3Configuration = s3Configuration.Value;
+        _proxyConfiguration = proxyConfiguration.Value;
+    }
+
+    public async Task Consume(ConsumeContext<IFileUploadRequestCreated> context)
+    {
+        var message = context.Message;
+
+        var putObjectRequest = new PutObjectRequest
+        {
+            BucketName = _s3Configuration.Bucket,
+            Key = message.FilePath
+        };
+
+        using var memoryStream = new MemoryStream(message.FileData);
+        putObjectRequest.InputStream = memoryStream;
+
+        var s3Response = await _amazonS3Client.PutObjectAsync(putObjectRequest);
+
+        if (s3Response.HttpStatusCode != System.Net.HttpStatusCode.OK)
+        {
+            _logger.LogError("Failed to upload file {FilePath} to S3", message.FilePath);
+
+            await _publishEndpoint.Publish<IFileUploadRequestStatusUpdate>(
+                new FileUploadRequestStatusUpdate(
+                    RequestId: message.RequestId,
+                    Status: RequestStatus.Failed,
+                    FileAccessUrl: null,
+                    ErrorMessage: "An error occurred while uploading file to S3."));
+            return;
+        }
+
+        var fileAccessUrl = _proxyConfiguration.BaseUrl + "/" + message.FilePath;
+
+        _logger.LogInformation("Successfully uploaded file {FilePath} to S3", message.FilePath);
+
+        await _publishEndpoint.Publish<IFileUploadRequestStatusUpdate>(
+            new FileUploadRequestStatusUpdate(
+                RequestId: message.RequestId,
+                Status: RequestStatus.Success,
+                FileAccessUrl: fileAccessUrl,
+                ErrorMessage: null));
+    }
+}