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);
+    }
+}
@@ -0,0 +1,11 @@
+using MediatR;
+using HrynCo.NotificationService.Services.Core;
+using Unit = HrynCo.NotificationService.Services.Core.Unit;
+
+namespace HrynCo.NotificationService.Services.EmailTemplates.Delete;
+
+public sealed record DeleteEmailTemplateCommand(
+    string ServiceName,
+    string Key,
+    string LanguageCode
+) : IRequest<ServiceResult<Unit>>;
@@ -0,0 +1,36 @@
+using HrynCo.NotificationService.DAL.Abstract;
+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.EmailTemplates.Delete;
+
+internal sealed class DeleteEmailTemplateHandler
+    : RequestHandler<DeleteEmailTemplateCommand, ServiceResult<Unit>>
+{
+    private readonly IEmailTemplateRepository _templates;
+
+    public DeleteEmailTemplateHandler(
+        IContextualSerilogLogger<DeleteEmailTemplateCommand> logger,
+        IUnitOfWork unitOfWork,
+        IEmailTemplateRepository templates)
+        : base(logger, unitOfWork)
+    {
+        _templates = templates;
+    }
+
+    protected override async Task<ServiceResult<Unit>> DoOnHandle(
+        DeleteEmailTemplateCommand request, CancellationToken cancellationToken)
+    {
+        var template = await _templates.GetAsync(
+            request.ServiceName, request.Key, request.LanguageCode, cancellationToken);
+
+        if (template is null)
+            return Failure<Unit>("Template not found.", ServiceErrorCode.NotFound);
+
+        await _templates.DeleteAsync(template, cancellationToken);
+
+        return Success(Unit.Value);
+    }
+}
@@ -0,0 +1,34 @@
+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.Get;
+
+internal sealed class GetEmailTemplateHandler
+    : RequestHandler<GetEmailTemplateQuery, ServiceResult<EmailTemplate>>
+{
+    private readonly IEmailTemplateRepository _templates;
+
+    public GetEmailTemplateHandler(
+        IContextualSerilogLogger<GetEmailTemplateQuery> logger,
+        IUnitOfWork unitOfWork,
+        IEmailTemplateRepository templates)
+        : base(logger, unitOfWork)
+    {
+        _templates = templates;
+    }
+
+    protected override async Task<ServiceResult<EmailTemplate>> DoOnHandle(
+        GetEmailTemplateQuery request, CancellationToken cancellationToken)
+    {
+        var template = await _templates.GetAsync(
+            request.ServiceName, request.Key, request.LanguageCode, cancellationToken);
+
+        return template is null
+            ? Failure<EmailTemplate>("Template not found.", ServiceErrorCode.NotFound)
+            : Success(template);
+    }
+}
@@ -0,0 +1,8 @@
+using HrynCo.NotificationService.DAL.Abstract.Templates;
+using MediatR;
+using HrynCo.NotificationService.Services.Core;
+
+namespace HrynCo.NotificationService.Services.EmailTemplates.Get;
+
+public sealed record GetEmailTemplateQuery(string ServiceName, string Key, string LanguageCode)
+    : IRequest<ServiceResult<EmailTemplate>>;
@@ -0,0 +1,30 @@
+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.GetByService;
+
+internal sealed class GetEmailTemplatesHandler
+    : RequestHandler<GetEmailTemplatesQuery, ServiceResult<IReadOnlyList<EmailTemplate>>>
+{
+    private readonly IEmailTemplateRepository _templates;
+
+    public GetEmailTemplatesHandler(
+        IContextualSerilogLogger<GetEmailTemplatesQuery> logger,
+        IUnitOfWork unitOfWork,
+        IEmailTemplateRepository templates)
+        : base(logger, unitOfWork)
+    {
+        _templates = templates;
+    }
+
+    protected override async Task<ServiceResult<IReadOnlyList<EmailTemplate>>> DoOnHandle(
+        GetEmailTemplatesQuery request, CancellationToken cancellationToken)
+    {
+        var templates = await _templates.GetByServiceAsync(request.ServiceName, cancellationToken);
+        return Success(templates);
+    }
+}
@@ -0,0 +1,8 @@
+using HrynCo.NotificationService.DAL.Abstract.Templates;
+using MediatR;
+using HrynCo.NotificationService.Services.Core;
+
+namespace HrynCo.NotificationService.Services.EmailTemplates.GetByService;
+
+public sealed record GetEmailTemplatesQuery(string ServiceName)
+    : IRequest<ServiceResult<IReadOnlyList<EmailTemplate>>>;
@@ -0,0 +1,16 @@
+using HrynCo.NotificationService.DAL.Abstract.Templates;
+using MediatR;
+using HrynCo.NotificationService.Services.Core;
+using Unit = HrynCo.NotificationService.Services.Core.Unit;
+
+namespace HrynCo.NotificationService.Services.EmailTemplates.Update;
+
+public sealed record UpdateEmailTemplateCommand(
+    string ServiceName,
+    string Key,
+    string LanguageCode,
+    string Subject,
+    string HtmlBody,
+    string TextBody,
+    IReadOnlyList<EmailTemplateVariable> Variables
+) : IRequest<ServiceResult<Unit>>;
@@ -0,0 +1,42 @@
+using HrynCo.NotificationService.DAL.Abstract;
+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.EmailTemplates.Update;
+
+internal sealed class UpdateEmailTemplateHandler
+    : RequestHandler<UpdateEmailTemplateCommand, ServiceResult<Unit>>
+{
+    private readonly IEmailTemplateRepository _templates;
+
+    public UpdateEmailTemplateHandler(
+        IContextualSerilogLogger<UpdateEmailTemplateCommand> logger,
+        IUnitOfWork unitOfWork,
+        IEmailTemplateRepository templates)
+        : base(logger, unitOfWork)
+    {
+        _templates = templates;
+    }
+
+    protected override async Task<ServiceResult<Unit>> DoOnHandle(
+        UpdateEmailTemplateCommand request, CancellationToken cancellationToken)
+    {
+        var template = await _templates.GetAsync(
+            request.ServiceName, request.Key, request.LanguageCode, cancellationToken);
+
+        if (template is null)
+            return Failure<Unit>("Template not found.", ServiceErrorCode.NotFound);
+
+        template.Subject = request.Subject;
+        template.HtmlBody = request.HtmlBody;
+        template.TextBody = request.TextBody;
+        template.Variables = request.Variables;
+        template.Updated = DateTimeOffset.UtcNow;
+
+        await _templates.UpdateAsync(template, cancellationToken);
+
+        return Success(Unit.Value);
+    }
+}