Move Infrastructure.FileUpload into Features.PhotoUpload (#290)

web/backend/Features/Features.PhotoUpload/Services/S3FileStorageProvider.cs

@@ -0,0 +1,96 @@
+using Amazon.S3;
+using Amazon.S3.Model;
+using Infrastructure.Configuration;
+using Microsoft.Extensions.Configuration;
+
+namespace Features.ImageUploads.Services;
+
+/// <summary>
+///     File storage service backed by an S3-compatible object store (e.g. SeaweedFS, AWS S3).
+///     Configured via application configuration (backed by environment variables).
+/// </summary>
+public class S3FileStorageProvider : IFileStorageProvider, IDisposable
+{
+    private readonly string _bucket;
+    private readonly IAmazonS3 _client;
+
+    /// <summary>
+    ///     Initializes a new instance of the <see cref="S3FileStorageProvider" /> class, reading storage
+    ///     configuration (<c>SEAWEEDFS_SERVICE_URL</c>, <c>SEAWEEDFS_ACCESS_KEY_ID</c>,
+    ///     <c>SEAWEEDFS_SECRET_ACCESS_KEY</c>, <c>SEAWEEDFS_BUCKET</c>) from <paramref name="configuration" />.
+    /// </summary>
+    /// <exception cref="InvalidOperationException">
+    ///     Thrown when any of the required configuration values is not set.
+    /// </exception>
+    public S3FileStorageProvider(IConfiguration configuration)
+    {
+        string serviceUrl = ConfigurationHelpers.GetKeyOrThrow(
+            configuration,
+            ConfigurationKeys.SeaweedFsServiceUrl
+        );
+        string accessKeyId = ConfigurationHelpers.GetKeyOrThrow(
+            configuration,
+            ConfigurationKeys.SeaweedFsAccessKeyId
+        );
+        string secretAccessKey = ConfigurationHelpers.GetKeyOrThrow(
+            configuration,
+            ConfigurationKeys.SeaweedFsSecretAccessKey
+        );
+
+        _bucket = ConfigurationHelpers.GetKeyOrThrow(
+            configuration,
+            ConfigurationKeys.SeaweedFsBucket
+        );
+
+        AmazonS3Config config = new() { ServiceURL = serviceUrl, ForcePathStyle = true };
+
+        _client = new AmazonS3Client(accessKeyId, secretAccessKey, config);
+    }
+
+    /// <inheritdoc/>
+    public async Task UploadAsync(
+        string key,
+        Stream content,
+        string contentType,
+        CancellationToken cancellationToken = default
+    )
+    {
+        PutObjectRequest request = new()
+        {
+            BucketName = _bucket,
+            Key = key,
+            InputStream = content,
+            ContentType = contentType,
+        };
+
+        await _client.PutObjectAsync(request, cancellationToken);
+    }
+
+    /// <inheritdoc/>
+    public async Task DeleteAsync(string key, CancellationToken cancellationToken = default)
+    {
+        DeleteObjectRequest request = new() { BucketName = _bucket, Key = key };
+
+        await _client.DeleteObjectAsync(request, cancellationToken);
+    }
+
+    /// <inheritdoc/>
+    public string GetPresignedUrl(string key, TimeSpan expiresIn)
+    {
+        GetPreSignedUrlRequest request = new()
+        {
+            BucketName = _bucket,
+            Key = key,
+            Expires = DateTime.UtcNow.Add(expiresIn),
+        };
+
+        return _client.GetPreSignedURL(request);
+    }
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        _client.Dispose();
+        GC.SuppressFinalize(this);
+    }
+}