From 4d7b551d79122c21bcc5607fd15ebd5251b57b31 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Wed, 29 Jan 2025 11:24:13 +0100
Subject: [PATCH] Add support for ExpandoObject attachments in email sending

This update enables handling ExpandoObject as email attachments by extracting relevant properties like FileName, ContentType, and Content. It ensures proper parsing of the content and supports both byte arrays and streams for attachment data.
---
 src/modules/Elsa.Email/Activities/SendEmail.cs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/modules/Elsa.Email/Activities/SendEmail.cs b/src/modules/Elsa.Email/Activities/SendEmail.cs
index 4ec9ca02d..db68773ca 100644
--- a/src/modules/Elsa.Email/Activities/SendEmail.cs
+++ b/src/modules/Elsa.Email/Activities/SendEmail.cs
@@ -1,4 +1,5 @@
 using System.Collections;
+using System.Dynamic;
 using System.Runtime.CompilerServices;
 using System.Text;
 using System.Text.Json;
@@ -183,6 +184,22 @@ public class SendEmail : Activity
                         else if (emailAttachment.Content is Stream stream)
                             await bodyBuilder.Attachments.AddAsync(fileName, stream, parsedContentType, cancellationToken);
 
+                        break;
+                    }
+                case ExpandoObject expandoObject:
+                    {
+                        var dictionary = new Dictionary<string, object>(expandoObject, StringComparer.OrdinalIgnoreCase);
+                        var fileName = dictionary.GetValue<string>("FileName") ?? $"Attachment-{++index}";
+                        var contentType = dictionary.GetValue<string>("ContentType") ?? "application/binary";
+                        var parsedContentType = ContentType.Parse(contentType);
+                        var content = dictionary.GetValue<object>("Content");
+
+                        if (content is byte[] bytes)
+                            bodyBuilder.Attachments.Add(fileName, bytes, parsedContentType);
+
+                        else if (content is Stream stream)
+                            await bodyBuilder.Attachments.AddAsync(fileName, stream, parsedContentType, cancellationToken);
+
                         break;
                     }
                 default: