Added S3 support and services

PostFundManagement.Domain/Abstractions/IS3Service.cs

@@ -0,0 +1,7 @@
+namespace PostFundManagement.Domain.Abstractions;
+
+public interface IS3Service
+{
+    Task<Result<string>> UploadFileAsync(string fileName, Stream fileStream, string contentType, CancellationToken cancellationToken = default);
+    Task<Result> DeleteFileAsync(string fileKey, CancellationToken cancellationToken = default);
+}

PostFundManagement.Domain/Abstractions/S3ServiceBase.cs

@@ -0,0 +1,83 @@
+using PostFundManagement.Domain.Services;
+
+namespace PostFundManagement.Domain.Abstractions;
+
+public abstract class S3ServiceBase(IAmazonS3 amazonS3)
+{
+    protected readonly IAmazonS3 Client = amazonS3;
+
+    protected abstract string BucketName { get; }
+    protected abstract string CdnBaseUrl { get; }
+
+    public virtual async Task<Result<string>> UploadFileAsync(string fileName, Stream fileStream, string contentType, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            if (string.IsNullOrWhiteSpace(BucketName))
+                return Result.Fail<string>("Bucket name is not configured.");
+
+            if (string.IsNullOrWhiteSpace(CdnBaseUrl))
+                return Result.Fail<string>("CDN base URL is not configured.");
+
+            using var stream = new MemoryStream();
+
+            await fileStream.CopyToAsync(stream, cancellationToken);
+            await fileStream.DisposeAsync();
+
+            stream.Seek(0, SeekOrigin.Begin);
+
+            var fileHash = HashService.StreamToSha256Hash(stream);
+
+            if(string.IsNullOrWhiteSpace(fileHash))
+                return Result.Fail<string>("Failed to compute file hash.");
+
+            var fileKey = $"{fileHash.ToLower(CultureInfo.InvariantCulture)}{Path.GetExtension(fileName)}";
+
+            var putRequest = new PutObjectRequest
+            {
+                BucketName = BucketName,
+                Key = fileKey,
+                InputStream = stream,
+                ContentType = contentType,
+                UseChunkEncoding = false,
+            };
+
+            stream.Seek(0, SeekOrigin.Begin);
+
+            var response = await Client.PutObjectAsync(putRequest, cancellationToken);
+
+            return response.HttpStatusCode != System.Net.HttpStatusCode.OK
+                ? Result.Fail<string>($"Failed to upload {fileName} to S3.")
+                : Result.Ok($"{CdnBaseUrl}/{fileKey}");
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<string>(new Error($"Error uploading {fileName} to S3: {ex.Message}").CausedBy(ex));
+        }
+    }
+
+    public virtual async Task<Result> DeleteFileAsync(string fileKey, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            if (string.IsNullOrWhiteSpace(BucketName))
+                return Result.Fail("Bucket name is not configured.");
+
+            var deleteRequest = new DeleteObjectRequest
+            {
+                BucketName = BucketName,
+                Key = fileKey
+            };
+
+            var response = await Client.DeleteObjectAsync(deleteRequest, cancellationToken);
+
+            return response.HttpStatusCode != System.Net.HttpStatusCode.NoContent
+                ? Result.Fail($"Failed to delete {fileKey} from S3.")
+                : Result.Ok();
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail(new Error($"Error deleting {fileKey} from S3: {ex.Message}").CausedBy(ex));
+        }
+    }
+}

PostFundManagement.Domain/Configuration/S3/S3Settings.cs

@@ -0,0 +1,16 @@
+namespace PostFundManagement.Domain.Configuration.S3;
+
+public sealed class S3Settings
+{
+    public string? ServiceUrl { get; set; }
+
+    public string? AccessKey { get; set; }
+
+    public string? SecretKey { get; set; }
+
+    public string? BucketName { get; set; }
+
+    public string? Region { get; set; }
+
+    public string? CdnBaseUrl { get; set; }
+}

PostFundManagement.Domain/Extensions/Constants.cs

@@ -2,6 +2,18 @@ namespace PostFundManagement.Domain.Extensions;
 
 public static class Constants
 {
+    public const string GeneralS3SettingsSection = "PfmS3Settings";
+
+    public const string EvidenceS3SettingsSection = "EvidenceS3Settings";
+
+    public const string ContractS3SettingsSection = "ContractS3Settings";
+
+    public const string GeneralQuotesBucketName = "pfm.general";
+
+    public const string EvidenceQuotesBucketName = "pfm.evidence";
+
+    public const string ContractQuotesBucketName = "pfm.contract";
+
     public const string DatabaseConfigName = "PfmDatabase";
     
     public const int LabelLength = 256;

PostFundManagement.Domain/Services/ContractS3Service.cs

@@ -0,0 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+using static PostFundManagement.Domain.Extensions.Constants;
+
+namespace PostFundManagement.Domain.Services;
+
+public sealed class ContractS3Service(IConfiguration configuration, [FromKeyedServices(ContractQuotesBucketName)] IAmazonS3 amazonS3) :
+    S3ServiceBase(amazonS3), IS3Service
+{
+    protected override string BucketName => configuration.GetSection($"{ContractS3SettingsSection}:BucketName").Value ?? "";
+    protected override string CdnBaseUrl => configuration.GetSection($"{ContractS3SettingsSection}:CdnBaseUrl").Value ?? "";
+}

PostFundManagement.Domain/Services/EvidenceS3Service.cs

@@ -0,0 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+using static PostFundManagement.Domain.Extensions.Constants;
+
+namespace PostFundManagement.Domain.Services;
+
+public sealed class EvidenceS3Service(IConfiguration configuration, [FromKeyedServices(EvidenceQuotesBucketName)] IAmazonS3 amazonS3) :
+    S3ServiceBase(amazonS3), IS3Service
+{
+    protected override string BucketName => configuration.GetSection($"{EvidenceS3SettingsSection}:BucketName").Value ?? "";
+    protected override string CdnBaseUrl => configuration.GetSection($"{EvidenceS3SettingsSection}:CdnBaseUrl").Value ?? "";
+}

PostFundManagement.Domain/Services/GeneralS3Service.cs

@@ -0,0 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+using static PostFundManagement.Domain.Extensions.Constants;
+
+namespace PostFundManagement.Domain.Services;
+
+public sealed class GeneralS3Service(IConfiguration configuration, [FromKeyedServices(GeneralQuotesBucketName)] IAmazonS3 amazonS3) :
+    S3ServiceBase(amazonS3), IS3Service
+{
+    protected override string BucketName => configuration.GetSection($"{GeneralS3SettingsSection}:BucketName").Value ?? "";
+    protected override string CdnBaseUrl => configuration.GetSection($"{GeneralS3SettingsSection}:CdnBaseUrl").Value ?? "";
+}