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 +1,15 @@
+using HrynCo.NotificationService.DAL.Abstract.Templates;
+using MediatR;
+using HrynCo.NotificationService.Services.Core;
+
+namespace HrynCo.NotificationService.Services.EmailTemplates.Create;
+
+public sealed record CreateEmailTemplateCommand(
+    string ServiceName,
+    string Key,
+    string LanguageCode,
+    string Subject,
+    string HtmlBody,
+    string TextBody,
+    IReadOnlyList<EmailTemplateVariable> Variables
+) : IRequest<ServiceResult<Guid>>;
@@ -0,0 +1,48 @@
+using HrynCo.NotificationService.DAL.Abstract;
+using HrynCo.NotificationService.DAL.Abstract.Repositories;
+using HrynCo.NotificationService.DAL.Abstract.Templates;
+using HrynCo.NotificationService.Services.Core;
+using HrynCo.NotificationService.Services.Logging;
+using static HrynCo.NotificationService.Services.Core.ServiceResultHelper;
+
+namespace HrynCo.NotificationService.Services.EmailTemplates.Create;
+
+internal sealed class CreateEmailTemplateHandler
+    : RequestHandler<CreateEmailTemplateCommand, ServiceResult<Guid>>
+{
+    private readonly IEmailTemplateRepository _templates;
+
+    public CreateEmailTemplateHandler(
+        IContextualSerilogLogger<CreateEmailTemplateCommand> logger,
+        IUnitOfWork unitOfWork,
+        IEmailTemplateRepository templates)
+        : base(logger, unitOfWork)
+    {
+        _templates = templates;
+    }
+
+    protected override async Task<ServiceResult<Guid>> DoOnHandle(
+        CreateEmailTemplateCommand request, CancellationToken cancellationToken)
+    {
+        var existing = await _templates.GetAsync(
+            request.ServiceName, request.Key, request.LanguageCode, cancellationToken);
+
+        if (existing is not null)
+            return Failure<Guid>("Template already exists.", ServiceErrorCode.Conflict);
+
+        var template = new EmailTemplate
+        {
+            ServiceName = request.ServiceName,
+            Key = request.Key,
+            LanguageCode = request.LanguageCode,
+            Subject = request.Subject,
+            HtmlBody = request.HtmlBody,
+            TextBody = request.TextBody,
+            Variables = request.Variables
+        };
+
+        await _templates.AddAsync(template, cancellationToken);
+
+        return Success(template.Id);
+    }
+}