Refactor email handling for multiple recipients

Refactored the `Email` and `OutgoingEmailEvent` classes to replace the `Recipient` property with a `Recipients` collection, enabling support for multiple recipients. Updated all related test cases, including `EmailSenderTests`, `EmailSenderUrlOverloadTests`, and `OutgoingEmailPublisherTests`, to reflect this change.

Moved the `EmailAccountDto` class and its references from the `DigitalData.MessagingService.Application.Common.Dtos` namespace to the `DigitalData.MessagingService.Publisher.Abstraction` namespace for better code organization. Updated `using` directives across affected files.

Removed unused `using` directives and updated the `Email` class's `ToEvent` method to map the new `Recipients` property. Adjusted test assertions to validate collections instead of single recipient strings.

src/core/DigitalData.MessagingService.Application/Common/Interfaces/IEmailService.cs

@@ -1,4 +1,4 @@
-using DigitalData.MessagingService.Application.Common.Dtos;
+using DigitalData.MessagingService.Publisher.Abstraction;
 
 namespace DigitalData.MessagingService.Application.Common.Interfaces;
 

src/core/DigitalData.MessagingService.Application/Common/Options/EmailAccountsOptions.cs

@@ -1,4 +1,4 @@
-using DigitalData.MessagingService.Application.Common.Dtos;
+using DigitalData.MessagingService.Publisher.Abstraction;
 
 namespace DigitalData.MessagingService.Application.Common.Options;
 

src/core/DigitalData.MessagingService.Application/EmailAccount/Queries/GetSenderQuery.cs

@@ -1,5 +1,5 @@
-using DigitalData.MessagingService.Application.Common.Dtos;
+using DigitalData.MessagingService.Application.Common.Options;
-using DigitalData.MessagingService.Application.Common.Options;
+using DigitalData.MessagingService.Publisher.Abstraction;
 using MediatR;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;

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

@@ -1,5 +1,4 @@
 using AutoMapper;
-using DigitalData.MessagingService.Application.Common.Dtos;
 using DigitalData.MessagingService.Application.EmailAccount.Queries;
 using DigitalData.MessagingService.Domain.Exceptions;
 using DigitalData.MessagingService.Publisher.Abstraction;

src/core/DigitalData.MessagingService.Publisher.Abstraction/EmailAccountDto.cs

@@ -1,4 +1,4 @@
-namespace DigitalData.MessagingService.Application.Common.Dtos;
+namespace DigitalData.MessagingService.Publisher.Abstraction;
 
 /// <summary>
 /// DTO for a single email account configuration.

src/core/DigitalData.MessagingService.Publisher.Abstraction/OutgoingEmailEvent.cs

@@ -1,6 +1,4 @@
-using DigitalData.MessagingService.Application.Common.Dtos;
+namespace DigitalData.MessagingService.Publisher.Abstraction;
-
-namespace DigitalData.MessagingService.Publisher.Abstraction;
 
 public record OutgoingEmailEvent
 {

src/infrastructure/DigitalData.MessagingService.Infrastructure/Services/LimilabsEmailService.cs

@@ -1,13 +1,11 @@
 using System.Text;
-using DigitalData.MessagingService.Application.Common.Dtos;
 using DigitalData.MessagingService.Application.Common.Interfaces;
 using DigitalData.MessagingService.Domain.Exceptions;
 using Limilabs.Client.SMTP;
 using Limilabs.Mail;
 using Limilabs.Mail.Headers;
-using Microsoft.Extensions.Options;
-using DigitalData.MessagingService.Application.Common.Options;
 using DigitalData.MessagingService.Infrastructure.Services.Extensions;
+using DigitalData.MessagingService.Publisher.Abstraction;
 
 namespace DigitalData.MessagingService.Infrastructure.Services;
 

src/presentation/DigitalData.MessagingService.API/Program.cs

@@ -1,6 +1,5 @@
 using DigitalData.MessagingService.API.Middleware;
 using DigitalData.MessagingService.Application;
-using DigitalData.MessagingService.Application.Common.Dtos;
 using DigitalData.MessagingService.Infrastructure;
 using Serilog;
 using Serilog.Ui.Core.Extensions;

src/presentation/DigitalData.MessagingService.Client/Email.cs

@@ -10,7 +10,7 @@ public record Email
     /// <summary>
     /// Recipient email address
     /// </summary>
-    public string Recipient { get; set; } = null!;
+    public IEnumerable<string> Recipients { get; set; } = null!;
 
     /// <summary>
     /// Email subject
@@ -36,7 +36,7 @@ public record Email
         return new OutgoingEmailEvent
         {
             Id = Guid.NewGuid(),
-            Recipient = Recipient,
+            Recipients = Recipients,
             Subject = Subject,
             Body = Body,
             IsHtml = IsHtml,

tests/DigitalData.MessagingService.Tests/Integration/EmailSenderTests.cs

@@ -77,7 +77,7 @@ public sealed class EmailSenderTests
     {
         var email = new Email
         {
-            Recipient = "hakanttek@gmail.com",
+            Recipients = ["hakanttek@gmail.com"],
             Subject = "EmailSender.Send Integration Test",
             Body = "<p>Sent via EmailSender static client.</p>",
             IsHtml = true,
@@ -93,7 +93,7 @@ public sealed class EmailSenderTests
     {
         var email = new Email
         {
-            Recipient = "hakanttek@gmail.com",
+            Recipients = ["hakanttek@gmail.com"],
             Subject = "Plain Text Test",
             Body = "This is a plain text email.",
             IsHtml = false

tests/DigitalData.MessagingService.Tests/Integration/EmailSenderUrlOverloadTests.cs

@@ -57,7 +57,7 @@ public sealed class EmailSenderUrlOverloadTests
     {
         var email = new Email
         {
-            Recipient = "url-overload-test@example.com",
+            Recipients = ["url-overload-test@example.com"],
             Subject = "URL Overload Integration Test",
             Body = "<p>Sent after URL-based connection.</p>",
             IsHtml = true

tests/DigitalData.MessagingService.Tests/Integration/OutgoingEmailPublisherTests.cs

@@ -37,7 +37,7 @@ public sealed class OutgoingEmailPublisherTests : IAsyncDisposable
         var email = new OutgoingEmailEvent
         {
             Id = Guid.NewGuid(),
-            Recipient = "test@example.com",
+            Recipients = ["test@example.com"],
             Subject = "Integration Test - EnqueueAsync",
             Body = "<p>Hello from integration test.</p>",
             IsHtml = true,
@@ -62,7 +62,7 @@ public sealed class OutgoingEmailPublisherTests : IAsyncDisposable
         var emails = Enumerable.Range(1, 3).Select(i => new OutgoingEmailEvent
         {
             Id = Guid.NewGuid(),
-            Recipient = $"recipient{i}@example.com",
+            Recipients = new List<string> { $"recipient{i}@example.com" },
             Subject = $"Integration Test - Batch #{i}",
             Body = $"Batch message {i}",
             IsHtml = false,
@@ -85,7 +85,7 @@ public sealed class OutgoingEmailPublisherTests : IAsyncDisposable
         var email = new OutgoingEmailEvent
         {
             Id = Guid.NewGuid(),
-            Recipient = "depth-test@example.com",
+            Recipients = ["depth-test@example.com"],
             Subject = "Integration Test - GetQueueDepth",
             Body = "Queue depth test",
             IsHtml = false,
@@ -108,7 +108,7 @@ public sealed class OutgoingEmailPublisherTests : IAsyncDisposable
         var email = new OutgoingEmailEvent
         {
             Id = id,
-            Recipient = "serialize@example.com",
+            Recipients = new List<string> { "serialize@example.com" },
             Subject = "Serialization Test",
             Body = "<strong>Bold</strong>",
             IsHtml = true,
@@ -123,7 +123,7 @@ public sealed class OutgoingEmailPublisherTests : IAsyncDisposable
 
         Assert.NotNull(received);
         Assert.Equal(id, received.Id);
-        Assert.Equal("serialize@example.com", received.Recipient);
+        Assert.Equal(["serialize@example.com"], received.Recipients);
         Assert.Equal("Serialization Test", received.Subject);
         Assert.Equal("<strong>Bold</strong>", received.Body);
         Assert.True(received.IsHtml);