feat: integrate Serilog and Telegram notifications

- Add Serilog for structured logging (Console + File) - Implement TelegramNotificationService for admin alerts - Log successful/failed login attempts with Telegram notifications - Add application startup/shutdown logging - Log important events to Telegram Chat ID: -5585148480 - Configuration: Telegram:BotToken and Telegram:ChatId in appsettings Features: - Automatic daily log rotation - Structured logging with timestamps - Environment-aware alerts - Error and info level Telegram messages Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-06-28 16:19:38 +09:00
parent e797da6140
commit 2bde490e9e
15 changed files with 517 additions and 8 deletions
@@ -0,0 +1,76 @@
+namespace TaxBaik.Web.Services;
+
+using System.Net.Http.Json;
+
+/// <summary>
+/// Telegram Bot 알림 서비스
+/// 중요 로깅 및 오류를 Telegram으로 전송
+/// </summary>
+public interface ITelegramNotificationService
+{
+    Task SendMessageAsync(string message, CancellationToken ct = default);
+    Task SendErrorAsync(string title, string details, CancellationToken ct = default);
+    Task SendInfoAsync(string title, string message, CancellationToken ct = default);
+}
+
+public class TelegramNotificationService : ITelegramNotificationService
+{
+    private readonly HttpClient _httpClient;
+    private readonly ILogger<TelegramNotificationService> _logger;
+    private readonly string _botToken;
+    private readonly string _chatId;
+    private const string TelegramApiUrl = "https://api.telegram.org";
+
+    public TelegramNotificationService(
+        HttpClient httpClient,
+        ILogger<TelegramNotificationService> logger,
+        IConfiguration config)
+    {
+        _httpClient = httpClient;
+        _logger = logger;
+        _botToken = config["Telegram:BotToken"] ?? "";
+        _chatId = config["Telegram:ChatId"] ?? "";
+    }
+
+    public async Task SendMessageAsync(string message, CancellationToken ct = default)
+    {
+        if (string.IsNullOrEmpty(_botToken) || string.IsNullOrEmpty(_chatId))
+        {
+            _logger.LogWarning("Telegram credentials not configured");
+            return;
+        }
+
+        try
+        {
+            var url = $"{TelegramApiUrl}/bot{_botToken}/sendMessage";
+            var payload = new
+            {
+                chat_id = _chatId,
+                text = message,
+                parse_mode = "HTML"
+            };
+
+            var response = await _httpClient.PostAsJsonAsync(url, payload, cancellationToken: ct);
+            if (!response.IsSuccessStatusCode)
+            {
+                _logger.LogError("Failed to send Telegram message: {StatusCode}", response.StatusCode);
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error sending Telegram message");
+        }
+    }
+
+    public async Task SendErrorAsync(string title, string details, CancellationToken ct = default)
+    {
+        var message = $"<b>❌ {title}</b>\n\n{details}\n\n<i>{DateTime.UtcNow:yyyy-MM-dd HH:mm:ss} UTC</i>";
+        await SendMessageAsync(message, ct);
+    }
+
+    public async Task SendInfoAsync(string title, string message, CancellationToken ct = default)
+    {
+        var text = $"<b>ℹ️ {title}</b>\n\n{message}\n\n<i>{DateTime.UtcNow:yyyy-MM-dd HH:mm:ss} UTC</i>";
+        await SendMessageAsync(text, ct);
+    }
+}