Refactor: Replace EmailAccountDto with EmailAccount

Replaced the `EmailAccountDto` class with the `EmailAccount` class across the codebase to consolidate the `EmailAccount` entity into the domain layer. Updated namespaces, method signatures, property types, and test cases to reflect this change.

Moved `EmailAccount` from `DigitalData.MessagingService.Application.Common.Dto` to `DigitalData.MessagingService.Domain.Entities`. Updated XML documentation and removed redundant project file entries. Adjusted namespaces for related queries, validators, and commands to align with the new structure.

These changes improve separation of concerns and align with domain-driven design principles.

src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccountDto.cs

@@ -1,52 +0,0 @@
-namespace DigitalData.MessagingService.Application.Common.Dto;
-
-/// <summary>
-/// DTO for a single email account configuration.
-/// </summary>
-public class EmailAccountDto
-{
-    /// <summary>
-    /// Logical name to identify this account (e.g. "default", "support").
-    /// </summary>
-    public int Id { get; set; }
-
-#if NET
-    public required string Username { get; set; }
-#else
-    public string Username { get; set; } = null!;
-#endif
-
-#if NET
-    public required string Password { get; set; }
-#else
-    public string Password { get; set; } = null!;
-#endif
-
-#if NET
-    public required string SmtpServer { get; set; }
-#else
-    public string SmtpServer { get; set; } = null!;
-#endif
-
-    public int SmtpPort { get; set; }
-
-    public bool SmtpUseSsl { get; set; }
-
-    public bool UseOAuth2 { get; set; }
-
-    /// <summary>
-    /// IMAP server hostname (e.g. "imap.example.com").
-    /// Leave empty when this account is send-only.
-    /// </summary>
-    public string? ImapServer { get; set; }
-
-    /// <summary>
-    /// IMAP server port (993 for SSL, 143 for plain/STARTTLS).
-    /// </summary>
-    public int ImapPort { get; set; } = 993;
-
-    /// <summary>
-    /// Use SSL/TLS when connecting to the IMAP server.
-    /// </summary>
-    public bool ImapUseSsl { get; set; } = true;
-}

src/core/DigitalData.MessagingService.Application/Common/Dto/EmailContext.cs

@@ -1,11 +1,13 @@
-namespace DigitalData.MessagingService.Application.Common.Dto;
+using DigitalData.MessagingService.Domain.Entities;
+
+namespace DigitalData.MessagingService.Application.Common.Dto;
 
 public record EmailContext
 {
 #if NETFRAMEWORK
-    public EmailAccountDto Sender { get; set; } = null!;
+    public EmailAccount Sender { get; set; } = null!;
 #else
-    public required EmailAccountDto Sender { get; init; }
+    public required EmailAccount Sender { get; init; }
 #endif
 
     /// <summary>

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

@@ -1,6 +1,7 @@
 #if NET
 using DigitalData.MessagingService.Application.Common.Dto;
 using DigitalData.MessagingService.Application.Common.Dto.MailSearch;
+using DigitalData.MessagingService.Domain.Entities;
 
 namespace DigitalData.MessagingService.Application.Common.Interfaces;
 
@@ -19,7 +20,7 @@ public interface IImapEmailService
     /// </param>
     /// <param name="cancellationToken">Cancellation token.</param>
     Task<IEnumerable<ReceivedEmailDto>> FetchEmailsAsync(
-        EmailAccountDto account,
+        EmailAccount account,
         MailSearchFilter filter,
         CancellationToken cancellationToken = default);
 
@@ -27,7 +28,7 @@ public interface IImapEmailService
     /// Marks a message as seen (read) on the server.
     /// </summary>
     Task MarkAsSeenAsync(
-        EmailAccountDto account,
+        EmailAccount account,
         long uid,
         string folder = "INBOX",
         CancellationToken cancellationToken = default);

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

@@ -1,10 +1,10 @@
 #if NET
-using DigitalData.MessagingService.Application.Common.Dto;
+using DigitalData.MessagingService.Domain.Entities;
 
 namespace DigitalData.MessagingService.Application.Common.Options;
 
 /// <summary>
-/// Wrapper options class that holds a list of <see cref="EmailAccountDto"/> entries
+/// Wrapper options class that holds a list of <see cref="Dto.EmailAccount"/> entries
 /// bound from the <c>EmailAccounts</c> configuration section.
 /// </summary>
 public class EmailAccountsOptions
@@ -14,7 +14,7 @@ public class EmailAccountsOptions
     /// <summary>
     /// The list of configured email accounts.
     /// </summary>
-    public required IEnumerable<EmailAccountDto> Accounts { get; init; } = [];
+    public required IEnumerable<EmailAccount> Accounts { get; init; } = [];
 
     /// <summary>
     /// How often the IMAP sync worker polls for new emails, in seconds.

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

@@ -1,13 +1,13 @@
 #if NET
 using DigitalData.MessagingService.Application.Common.Options;
-using DigitalData.MessagingService.Application.Common.Dto;
 using MediatR;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using DigitalData.MessagingService.Domain.Entities;
 
-namespace DigitalData.MessagingService.Application.EmailAccount.Queries;
+namespace DigitalData.MessagingService.Application.EmailAccounts.Queries;
 
-public record GetSenderQuery : IRequest<EmailAccountDto?>
+public record GetSenderQuery : IRequest<EmailAccount?>
 {
     public int? Id { get; init; }
 
@@ -19,9 +19,9 @@ public record GetSenderQuery : IRequest<EmailAccountDto?>
 /// </summary>
 /// <param name="Options"></param>
 /// <param name="Logger"></param>
-public class GetSenderQueryHandler(IOptions<EmailAccountsOptions> Options, ILogger<GetSenderQueryHandler> Logger) : IRequestHandler<GetSenderQuery, EmailAccountDto?>
+public class GetSenderQueryHandler(IOptions<EmailAccountsOptions> Options, ILogger<GetSenderQueryHandler> Logger) : IRequestHandler<GetSenderQuery, EmailAccount?>
 {
-    public Task<EmailAccountDto?> Handle(GetSenderQuery request, CancellationToken cancellationToken)
+    public Task<EmailAccount?> Handle(GetSenderQuery request, CancellationToken cancellationToken)
     {
         var accounts = request.Id is not null
             ? Options.Value.Accounts.Where(a => a.Id == request.Id)

src/core/DigitalData.MessagingService.Application/EmailAccounts/Validators/GetSenderQueryValidator.cs

@@ -1,8 +1,8 @@
 #if NET
-using DigitalData.MessagingService.Application.EmailAccount.Queries;
+using DigitalData.MessagingService.Application.EmailAccounts.Queries;
 using FluentValidation;
 
-namespace DigitalData.MessagingService.Application.EmailAccount.Validators;
+namespace DigitalData.MessagingService.Application.EmailAccounts.Validators;
 
 /// <summary>
 /// Validator for <see cref="GetSenderQuery"/>.

src/core/DigitalData.MessagingService.Application/EmailReceiving/Commands/MarkEmailAsSeenCommand.cs

@@ -1,6 +1,6 @@
 #if NET
 using DigitalData.MessagingService.Application.Common.Interfaces;
-using DigitalData.MessagingService.Application.EmailAccount.Queries;
+using DigitalData.MessagingService.Application.EmailAccounts.Queries;
 using DigitalData.MessagingService.Domain.Exceptions;
 using MediatR;
 

src/core/DigitalData.MessagingService.Application/EmailReceiving/Queries/FetchEmailsQuery.cs

@@ -2,7 +2,7 @@
 using DigitalData.MessagingService.Application.Common.Dto;
 using DigitalData.MessagingService.Application.Common.Dto.MailSearch;
 using DigitalData.MessagingService.Application.Common.Interfaces;
-using DigitalData.MessagingService.Application.EmailAccount.Queries;
+using DigitalData.MessagingService.Application.EmailAccounts.Queries;
 using DigitalData.MessagingService.Domain.Exceptions;
 using MediatR;
 

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

@@ -1,11 +1,11 @@
 #if NET
 using AutoMapper;
-using DigitalData.MessagingService.Application.EmailAccount.Queries;
 using DigitalData.MessagingService.Domain.Exceptions;
 using DigitalData.MessagingService.Application.Common.Dto;
 using MediatR;
 using System.Text.Json.Serialization;
 using DigitalData.MessagingService.Application.Common.Interfaces;
+using DigitalData.MessagingService.Application.EmailAccounts.Queries;
 
 namespace DigitalData.MessagingService.Application.EmailSending.Commands;