Add project files.

CalendarReminder.Api/Services/EmailService.cs

@@ -0,0 +1,51 @@
+using MailKit.Net.Smtp;
+using MimeKit;
+
+namespace CalendarReminder.Api.Services;
+
+public class EmailSettings
+{
+    public string Host { get; set; } = "";
+    public int Port { get; set; } = 587;
+    public string Username { get; set; } = "";
+    public string Password { get; set; } = "";
+    public string From { get; set; } = "";
+    public bool UseSsl { get; set; } = false;
+}
+
+public class EmailService
+{
+    private readonly EmailSettings _settings;
+    private readonly ILogger<EmailService> _logger;
+
+    public EmailService(IConfiguration config, ILogger<EmailService> logger)
+    {
+        _settings = config.GetSection("Email").Get<EmailSettings>() ?? new EmailSettings();
+        _logger = logger;
+    }
+
+    public async Task SendAsync(string toEmail, string toName, string subject, string body)
+    {
+        try
+        {
+            var message = new MimeMessage();
+            message.From.Add(new MailboxAddress("CalendarReminder", _settings.From));
+            message.To.Add(new MailboxAddress(toName, toEmail));
+            message.Subject = subject;
+            message.Body = new TextPart("html") { Text = body };
+
+            using var client = new SmtpClient();
+            await client.ConnectAsync(_settings.Host, _settings.Port, _settings.UseSsl);
+            if (!string.IsNullOrEmpty(_settings.Username))
+                await client.AuthenticateAsync(_settings.Username, _settings.Password);
+            await client.SendAsync(message);
+            await client.DisconnectAsync(true);
+
+            _logger.LogInformation("Email odoslaný na {Email}", toEmail);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Chyba pri odosielaní emailu na {Email}", toEmail);
+        }
+    }
+}