From 18bb07cd93254672c6bf634ea971d31a0f6429c6 Mon Sep 17 00:00:00 2001
From: TekH <h.tek@digitaldata.works>
Date: Tue, 7 Jul 2026 18:58:59 +0200
Subject: [PATCH] feat(domain): add domain exception hierarchy

- DomainException: Base exception for all domain errors
- ValidationException: Business rule validation failures
- AttachmentProcessingException: Attachment-specific processing errors

Exceptions maintain error code compatibility with legacy system.
---
 .../AttachmentProcessingException.cs          | 19 +++++++++++++++++++
 .../Exceptions/DomainException.cs             | 12 ++++++++++++
 .../Exceptions/ValidationException.cs         | 12 ++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 src/DigitalData.EmailProfiler.Domain/Exceptions/AttachmentProcessingException.cs
 create mode 100644 src/DigitalData.EmailProfiler.Domain/Exceptions/DomainException.cs
 create mode 100644 src/DigitalData.EmailProfiler.Domain/Exceptions/ValidationException.cs

diff --git a/src/DigitalData.EmailProfiler.Domain/Exceptions/AttachmentProcessingException.cs b/src/DigitalData.EmailProfiler.Domain/Exceptions/AttachmentProcessingException.cs
new file mode 100644
index 0000000..ee0fe44
--- /dev/null
+++ b/src/DigitalData.EmailProfiler.Domain/Exceptions/AttachmentProcessingException.cs
@@ -0,0 +1,19 @@
+using DigitalData.EmailProfiler.Domain.Enums;
+
+namespace DigitalData.EmailProfiler.Domain.Exceptions;
+
+public class AttachmentProcessingException : DomainException
+{
+    public ErrorCode ErrorCode { get; }
+
+    public AttachmentProcessingException(ErrorCode errorCode, string message) : base(message)
+    {
+        ErrorCode = errorCode;
+    }
+
+    public AttachmentProcessingException(ErrorCode errorCode, string message, Exception innerException) 
+        : base(message, innerException)
+    {
+        ErrorCode = errorCode;
+    }
+}
diff --git a/src/DigitalData.EmailProfiler.Domain/Exceptions/DomainException.cs b/src/DigitalData.EmailProfiler.Domain/Exceptions/DomainException.cs
new file mode 100644
index 0000000..3c311f7
--- /dev/null
+++ b/src/DigitalData.EmailProfiler.Domain/Exceptions/DomainException.cs
@@ -0,0 +1,12 @@
+namespace DigitalData.EmailProfiler.Domain.Exceptions;
+
+public class DomainException : Exception
+{
+    public DomainException(string message) : base(message)
+    {
+    }
+
+    public DomainException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
+}
diff --git a/src/DigitalData.EmailProfiler.Domain/Exceptions/ValidationException.cs b/src/DigitalData.EmailProfiler.Domain/Exceptions/ValidationException.cs
new file mode 100644
index 0000000..d6432e7
--- /dev/null
+++ b/src/DigitalData.EmailProfiler.Domain/Exceptions/ValidationException.cs
@@ -0,0 +1,12 @@
+namespace DigitalData.EmailProfiler.Domain.Exceptions;
+
+public class ValidationException : DomainException
+{
+    public ValidationException(string message) : base(message)
+    {
+    }
+
+    public ValidationException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
+}