feat: add MediatR handlers for template and channel CRUD

- ServiceResult<T>, ServiceError, ServiceErrorCode, Unit, ServiceResultHelper in Services/Core - RequestHandler<TRequest, TResponse> base class (MediatR-adapted, DoOnHandle pattern) - EmailTemplate handlers: Create, Update, Delete, Get, GetByService - EmailChannel handlers: Create, Update, Delete, Get, GetByService Ref: IT-628 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-05-02 01:07:13 +03:00
parent 73b506992c
commit a03d2269a6
26 changed files with 565 additions and 0 deletions
@@ -0,0 +1,33 @@
+using HrynCo.NotificationService.DAL.Abstract;
+using HrynCo.NotificationService.DAL.Abstract.Providers;
+using HrynCo.NotificationService.DAL.Abstract.Repositories;
+using HrynCo.NotificationService.Services.Core;
+using HrynCo.NotificationService.Services.Logging;
+using static HrynCo.NotificationService.Services.Core.ServiceResultHelper;
+
+namespace HrynCo.NotificationService.Services.EmailChannels.Get;
+
+internal sealed class GetEmailChannelHandler
+    : RequestHandler<GetEmailChannelQuery, ServiceResult<EmailChannel>>
+{
+    private readonly IEmailChannelRepository _channels;
+
+    public GetEmailChannelHandler(
+        IContextualSerilogLogger<GetEmailChannelQuery> logger,
+        IUnitOfWork unitOfWork,
+        IEmailChannelRepository channels)
+        : base(logger, unitOfWork)
+    {
+        _channels = channels;
+    }
+
+    protected override async Task<ServiceResult<EmailChannel>> DoOnHandle(
+        GetEmailChannelQuery request, CancellationToken cancellationToken)
+    {
+        var channel = await _channels.GetByIdAsync(request.Id, cancellationToken);
+
+        return channel is null
+            ? Failure<EmailChannel>("Email channel not found.", ServiceErrorCode.NotFound)
+            : Success(channel);
+    }
+}