feat: добавил отправку уведомлений по почте

backend/UniVerse.Infrastructure/Notifications/EmailNotificationProvider.cs

@@ -0,0 +1,57 @@
+using System.Net;
+using System.Net.Mail;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using UniVerse.Application.DTOs.Notifications;
+using UniVerse.Application.Interfaces;
+
+namespace UniVerse.Infrastructure.Notifications;
+
+public class EmailNotificationProvider : INotificationProvider
+{
+    private readonly EmailNotificationOptions _options;
+    private readonly ILogger<EmailNotificationProvider> _logger;
+
+    public EmailNotificationProvider(IOptions<EmailNotificationOptions> options, ILogger<EmailNotificationProvider> logger)
+    {
+        _options = options.Value;
+        _logger = logger;
+    }
+
+    public string Channel => NotificationChannels.Email;
+
+    public async Task SendAsync(NotificationMessage message, CancellationToken cancellationToken = default)
+    {
+        ValidateOptions();
+
+        using var mailMessage = new MailMessage
+        {
+            From = new MailAddress(_options.FromAddress, _options.FromName),
+            Subject = message.Subject,
+            Body = message.Body,
+            IsBodyHtml = false
+        };
+        mailMessage.To.Add(new MailAddress(message.Recipient, message.RecipientName));
+
+        using var client = new SmtpClient(_options.Host, _options.Port)
+        {
+            EnableSsl = _options.EnableSsl
+        };
+
+        if (!string.IsNullOrWhiteSpace(_options.UserName))
+        {
+            client.Credentials = new NetworkCredential(_options.UserName, _options.Password);
+        }
+
+        _logger.LogInformation("Sending email notification to {Recipient}", message.Recipient);
+        await client.SendMailAsync(mailMessage, cancellationToken);
+    }
+
+    private void ValidateOptions()
+    {
+        if (string.IsNullOrWhiteSpace(_options.Host))
+            throw new InvalidOperationException("Email:Smtp:Host is not configured.");
+        if (string.IsNullOrWhiteSpace(_options.FromAddress))
+            throw new InvalidOperationException("Email:Smtp:FromAddress is not configured.");
+    }
+}