feat: добавил отправку уведомлений по почте

backend/UniVerse.Infrastructure/Notifications/QuartzNotificationScheduler.cs

@@ -0,0 +1,48 @@
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+using Quartz;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+
+namespace UniVerse.Infrastructure.Notifications;
+
+public class QuartzNotificationScheduler : INotificationScheduler
+{
+    private const string NotificationGroup = "notifications";
+
+    private readonly ISchedulerFactory _schedulerFactory;
+    private readonly ILogger<QuartzNotificationScheduler> _logger;
+
+    public QuartzNotificationScheduler(ISchedulerFactory schedulerFactory, ILogger<QuartzNotificationScheduler> logger)
+    {
+        _schedulerFactory = schedulerFactory;
+        _logger = logger;
+    }
+
+    public async Task<ScheduledNotificationResponse> ScheduleAsync(NotificationMessage message, DateTimeOffset sendAt, CancellationToken cancellationToken = default)
+    {
+        if (sendAt <= DateTimeOffset.UtcNow)
+            throw new ArgumentException("Scheduled notification time must be in the future.", nameof(sendAt));
+
+        var scheduler = await _schedulerFactory.GetScheduler(cancellationToken);
+        var jobId = Guid.NewGuid().ToString("N");
+        var jobKey = new JobKey(jobId, NotificationGroup);
+        var payload = JsonSerializer.Serialize(message);
+
+        var job = JobBuilder.Create<NotificationJob>()
+            .WithIdentity(jobKey)
+            .UsingJobData(NotificationJob.MessageDataKey, payload)
+            .Build();
+
+        var trigger = TriggerBuilder.Create()
+            .WithIdentity($"{jobId}.trigger", NotificationGroup)
+            .ForJob(job)
+            .StartAt(sendAt)
+            .Build();
+
+        await scheduler.ScheduleJob(job, trigger, cancellationToken);
+        _logger.LogInformation("Scheduled notification job {JobId} for {SendAt}", jobId, sendAt);
+
+        return new ScheduledNotificationResponse(jobId, sendAt);
+    }
+}