Add Publisher.Abstraction project and refactor namespaces

Introduced a new project, `DigitalData.MessagingService.Publisher.Abstraction`, to encapsulate the `OutgoingEmailEvent` class and `IOutgoingEmailPublisher` interface. The project targets multiple frameworks (`net462`, `net480`, `net8.0`) and enables nullable reference types and the latest C# language version.

Moved `OutgoingEmailEvent` and `IOutgoingEmailPublisher` to the new project, updating their namespaces and replacing `required` properties with mutable ones in `OutgoingEmailEvent`. Updated all dependent files to reference the new namespace.

Updated the solution file to include the new project and adjusted build configurations. Cleaned up unused `using` directives and removed redundant `LangVersion` property in the new project file.

DigitalData.MessagingService.Publisher/DigitalData.MessagingService.Publisher.Abstraction.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+	<TargetFrameworks>net462;net480;net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+</Project>

DigitalData.MessagingService.Publisher/IOutgoingEmailPublisher.cs

@@ -1,7 +1,7 @@
-using DigitalData.MessagingService.Application.Common.Events;
+using System.Threading;
-using DigitalData.MessagingService.Application.EmailSending.Commands;
+using System.Threading.Tasks;
 
-namespace DigitalData.MessagingService.Application.Common.Interfaces;
+namespace DigitalData.MessagingService.Publisher.Abstraction;
 
 /// <summary>
 /// Email queue interface for outgoing emails.

DigitalData.MessagingService.Publisher/OutgoingEmailEvent.cs

@@ -0,0 +1,30 @@
+using System;
+
+namespace DigitalData.MessagingService.Publisher.Abstraction;
+
+public class OutgoingEmailEvent
+{
+    public Guid Id { get; set; }
+
+    /// <summary>
+    /// Recipient email address
+    /// </summary>
+    public string Recipient { get; set; } = null!;
+
+    /// <summary>
+    /// Email subject
+    /// </summary>
+    public string Subject { get; set; } = null!;
+
+    /// <summary>
+    /// Email body (HTML or plain text)
+    /// </summary>
+    public string Body { get; set; } = null!;
+
+    /// <summary>
+    /// Is HTML email (default: true)
+    /// </summary>
+    public bool IsHtml { get; set; } = true;
+
+    public DateTime QueuedAt { get; set; }
+}

DigitalData.MessagingService.sln

@@ -37,6 +37,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DigitalData.MessagingServic
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DigitalData.MessagingService.Client.Infrastructure", "DigitalData.MessagingService.Client.Infrastructure\DigitalData.MessagingService.Client.Infrastructure.csproj", "{4ED75E1B-FE53-4AA9-AB83-E35E25049D6D}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DigitalData.MessagingService.Publisher.Abstraction", "DigitalData.MessagingService.Publisher\DigitalData.MessagingService.Publisher.Abstraction.csproj", "{99CA4C0E-75A5-4143-97BB-9C605E65E692}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -75,6 +77,10 @@ Global
 		{4ED75E1B-FE53-4AA9-AB83-E35E25049D6D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4ED75E1B-FE53-4AA9-AB83-E35E25049D6D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4ED75E1B-FE53-4AA9-AB83-E35E25049D6D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{99CA4C0E-75A5-4143-97BB-9C605E65E692}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{99CA4C0E-75A5-4143-97BB-9C605E65E692}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{99CA4C0E-75A5-4143-97BB-9C605E65E692}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{99CA4C0E-75A5-4143-97BB-9C605E65E692}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -89,8 +95,9 @@ Global
 		{DD9D4A3A-AB55-456E-80D3-54A2D4025E64} = {02EA681E-C7D8-13C7-8484-4AC65E1B71E8}
 		{71BEA4D0-7835-4A8C-B11E-1088E0801DCE} = {02EA681E-C7D8-13C7-8484-4AC65E1B71E8}
 		{5B941DD2-7D0E-5D58-5D32-7E1B4C249CBC} = {71BEA4D0-7835-4A8C-B11E-1088E0801DCE}
-		{C553F2ED-1585-E143-70E5-44A8D64D1BDF} = {DD9D4A3A-AB55-456E-80D3-54A2D4025E64}
+		{C553F2ED-1585-E143-70E5-44A8D64D1BDF} = {B52B4CEE-1C67-424B-8659-370FEA7EAF2A}
 		{4ED75E1B-FE53-4AA9-AB83-E35E25049D6D} = {71BEA4D0-7835-4A8C-B11E-1088E0801DCE}
+		{99CA4C0E-75A5-4143-97BB-9C605E65E692} = {DD9D4A3A-AB55-456E-80D3-54A2D4025E64}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {90E29FDC-F6C6-414F-94BF-25DF61D18060}

src/DigitalData.MessagingService.Application/Common/Events/OutgoingEmailEvent.cs

@@ -1,28 +0,0 @@
-namespace DigitalData.MessagingService.Application.Common.Events;
-
-public class OutgoingEmailEvent
-{
-    public required Guid Id { get; init; }
-
-    /// <summary>
-    /// Recipient email address
-    /// </summary>
-    public required string Recipient { get; init; }
-
-    /// <summary>
-    /// Email subject
-    /// </summary>
-    public required string Subject { get; init; }
-
-    /// <summary>
-    /// Email body (HTML or plain text)
-    /// </summary>
-    public required string Body { get; init; }
-
-    /// <summary>
-    /// Is HTML email (default: true)
-    /// </summary>
-    public bool IsHtml { get; init; } = true;
-
-    public DateTime QueuedAt { get; init; }
-}

src/DigitalData.MessagingService.Application/Common/Mappings/EmailMappingProfile.cs

@@ -1,6 +1,6 @@
 using AutoMapper;
-using DigitalData.MessagingService.Application.Common.Events;
 using DigitalData.MessagingService.Application.EmailSending.Commands;
+using DigitalData.MessagingService.Publisher.Abstraction;
 
 namespace DigitalData.MessagingService.Application.Common.Mappings;
 

src/DigitalData.MessagingService.Application/DigitalData.MessagingService.Application.csproj

@@ -7,6 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\DigitalData.MessagingService.Publisher\DigitalData.MessagingService.Publisher.Abstraction.csproj" />
     <ProjectReference Include="..\DigitalData.MessagingService.Domain\DigitalData.MessagingService.Domain.csproj" />
   </ItemGroup>
 

src/DigitalData.MessagingService.Application/EmailSending/Commands/SendEmailCommand.cs

@@ -1,6 +1,5 @@
 using AutoMapper;
-using DigitalData.MessagingService.Application.Common.Events;
+using DigitalData.MessagingService.Publisher.Abstraction;
-using DigitalData.MessagingService.Application.Common.Interfaces;
 using MediatR;
 
 namespace DigitalData.MessagingService.Application.EmailSending.Commands;

src/DigitalData.MessagingService.Infrastructure/DependencyInjection.cs

@@ -2,6 +2,7 @@ using DigitalData.MessagingService.Application.Common.Interfaces;
 using DigitalData.MessagingService.Infrastructure.Queue;
 using DigitalData.MessagingService.Infrastructure.Services;
 using DigitalData.MessagingService.Infrastructure.Services.Background;
+using DigitalData.MessagingService.Publisher.Abstraction;
 using DigitalData.MessagingService.RabbitMQ;
 using Microsoft.AspNetCore.DataProtection;
 using Microsoft.Extensions.Configuration;

src/DigitalData.MessagingService.Infrastructure/Queue/OutgoingEmailConsumer.cs

@@ -1,12 +1,12 @@
 using System.Text;
 using System.Text.Json;
 using DigitalData.MessagingService.Application.Common.Interfaces;
+using DigitalData.MessagingService.Publisher.Abstraction;
 using DigitalData.MessagingService.RabbitMQ;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using RabbitMQ.Client;
 using RabbitMQ.Client.Events;
-using DigitalData.MessagingService.Application.Common.Events;
 
 namespace DigitalData.MessagingService.Infrastructure.Queue;
 

src/DigitalData.MessagingService.Infrastructure/Queue/OutgoingEmailPublisher.cs

@@ -1,11 +1,10 @@
 using System.Text;
 using System.Text.Json;
-using DigitalData.MessagingService.Application.Common.Interfaces;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using RabbitMQ.Client;
-using DigitalData.MessagingService.Application.Common.Events;
 using DigitalData.MessagingService.RabbitMQ;
+using DigitalData.MessagingService.Publisher.Abstraction;
 
 namespace DigitalData.MessagingService.Infrastructure.Queue;