feat: add RabbitMQ worker, contracts, usage UI in channels screen

- Add HrynCo.NotificationService.Contracts project with SendEmailMessage and NotificationResultMessage - Add SendEmailConsumer (RabbitMQ worker) with reply-to pattern via CorrelationContext.ReplyTo - Add SendEmailHandler owning SMTP send + usage increment as business logic - Add GetChannelUsageSummaryHandler with single DB query via navigation property - Merge usage stats inline into channels list (daily/monthly with progress bars) - Refactor AdminChannelsController.Index to use GetChannelUsageSummaryQuery - Add RabbitMQ service to docker-compose files - Remove dead AdminChannelUsageController, ChannelUsageViewModel, ChannelUsageSummary Ref: IT-628 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-05-02 14:00:58 +03:00
parent 395f5573a1
commit b0996833bc
29 changed files with 569 additions and 78 deletions
@@ -0,0 +1,17 @@
+using HrynCo.NotificationService.Services.Core;
+using MediatR;
+
+namespace HrynCo.NotificationService.Services.EmailChannels.Send;
+
+/// <summary>
+/// Sends an email via the channel associated with the given channel ID,
+/// then increments the usage counter for that channel.
+/// </summary>
+public sealed record SendEmailCommand(
+    Guid ChannelId,
+    string RecipientEmail,
+    string RecipientName,
+    string Subject,
+    string HtmlBody,
+    string? TextBody
+) : IRequest<ServiceResult<Core.Unit>>;
@@ -0,0 +1,80 @@
+using System.Net;
+using System.Net.Mail;
+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.Send;
+
+internal sealed class SendEmailHandler
+    : RequestHandler<SendEmailCommand, ServiceResult<Core.Unit>>
+{
+    private readonly IEmailChannelRepository _channels;
+    private readonly IEmailChannelUsageRepository _usage;
+
+    public SendEmailHandler(
+        IContextualSerilogLogger<SendEmailCommand> logger,
+        IUnitOfWork unitOfWork,
+        IEmailChannelRepository channels,
+        IEmailChannelUsageRepository usage)
+        : base(logger, unitOfWork)
+    {
+        _channels = channels;
+        _usage = usage;
+    }
+
+    protected override async Task<ServiceResult<Core.Unit>> DoOnHandle(
+        SendEmailCommand request, CancellationToken cancellationToken)
+    {
+        var channel = await _channels.GetByIdAsync(request.ChannelId, cancellationToken);
+        if (channel is null)
+            return Failure<Core.Unit>($"Channel '{request.ChannelId}' not found.");
+
+        if (channel.Settings is not SmtpChannelSettings smtp)
+            return Failure<Core.Unit>($"Channel type '{channel.EmailChannelType}' is not supported for sending.");
+
+        try
+        {
+            using var client = new SmtpClient(smtp.Host, smtp.Port)
+            {
+                EnableSsl = smtp.UseSsl,
+                Credentials = string.IsNullOrWhiteSpace(smtp.Username)
+                    ? null
+                    : new NetworkCredential(smtp.Username, smtp.Password)
+            };
+
+            using var mail = new MailMessage
+            {
+                From = new MailAddress(smtp.FromEmail, smtp.FromName),
+                Subject = request.Subject,
+                Body = request.HtmlBody,
+                IsBodyHtml = true
+            };
+
+            if (!string.IsNullOrWhiteSpace(request.TextBody))
+            {
+                var plain = AlternateView.CreateAlternateViewFromString(request.TextBody, null, "text/plain");
+                mail.AlternateViews.Add(plain);
+            }
+
+            mail.To.Add(new MailAddress(request.RecipientEmail, request.RecipientName));
+
+            await client.SendMailAsync(mail, cancellationToken);
+        }
+        catch (Exception ex)
+        {
+            Logger.Error(ex, "SMTP send failed for channel {ChannelId}", request.ChannelId);
+            return Failure<Core.Unit>(ex.Message);
+        }
+
+        await _usage.IncrementUsageAsync(
+            request.ChannelId,
+            DateOnly.FromDateTime(DateTime.UtcNow),
+            cancellationToken);
+
+        return Success(Unit.Value);
+    }
+}