Error Logger With Bot

A powerful Flutter package for sending error logs and custom messages to Telegram bot with automatic device info collection and detailed error reporting! 🚀

✨ Features

Easy Setup: Get started with just 3 lines of code
Detailed Error Reports: Automatic device info, app version, request/response details
Automatic Fallback: Falls back to plain text if HTML format fails
Custom Templates: Create your own error message templates
Telegram Groups Support: Send to private chats or groups
Multiple Formats: HTML, MarkdownV2, and plain text support
Stack Trace Formatting: Shows only relevant stack trace parts
Pre-built Templates: Ready-to-use templates for success, warning, and error messages

🚀 Installation

Add this to your package's pubspec.yaml file:

dependencies:
  error_logger_with_bot: ^1.0.0

Then run:

flutter pub get

📱 Telegram Bot Setup

1. Create a Bot

Open Telegram and search for @BotFather
Send /newbot command
Enter bot name and username
Save the bot token (e.g., 123456789:AAHdqTcvCH1vGWJxfSeofSAs0K5PALDsaw)

2. Get Chat ID

For Private Chat:

Search for @userinfobot in Telegram
Send /start to the bot
Copy your Chat ID (e.g., 123456789)

For Group Chat:

Add your bot to the group
Give the bot admin permissions (to send messages)
Send any message to the group
Visit this URL in your browser:
```
https://api.telegram.org/bot<BOT_TOKEN>/getUpdates
```
Replace <BOT_TOKEN> with your actual bot token
Find the group chat ID in the response (e.g., -1001234567890)

Note: Group chat IDs always start with a minus (-) sign!

🔧 Usage

1. Initialize the Package

import 'package:error_logger_with_bot/error_logger_with_bot.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  // Initialize ErrorLoggerWithBot
  TelegramLogger.init(
    botToken: '123456789:AAHdqTcvCH1vGWJxfSeofSAs0K5PALDsaw',
    chatId: '123456789', // or for groups: '-1001234567890'
    appName: 'My Awesome App',
    logSuccessText: '✅ Log sent successfully',
    logFailText: '❌ Failed to send log:',
  );
  
  runApp(MyApp());
}

2. Send Error Reports

import 'package:dio/dio.dart';
import 'package:error_logger_with_bot/error_logger_with_bot.dart';

class ApiService {
  final Dio _dio = Dio();
  
  Future<void> fetchData() async {
    try {
      final response = await _dio.get('https://api.example.com/data');
      // Handle API response...
    } on DioException catch (e, stackTrace) {
      // Send error to Telegram
      await TelegramLogger.sendError(
        error: e,
        stackTrace: stackTrace,
        context: context, // optional
      );
      
      // Rethrow or handle the error
      rethrow;
    }
  }
}

3. Custom Error Templates

await TelegramLogger.sendError(
  error: dioError,
  stackTrace: stackTrace,
  context: context,
  customTemplate: (error, time, appName) {
    return '''
🔥 Critical Error in $appName!

⏰ Time: ${time.toString()}
❌ Error: $error

Please check immediately! 🚨
''';
  },
);

4. Send Other Message Types

// Success message
final successMessage = TelegramMessageFormatter.createSuccessTemplate(
  title: 'Operation Successful',
  message: 'User registration completed',
  data: {'user_id': 123, 'email': 'user@example.com'},
);

await TelegramMessageFormatter.sendHtmlMessage(
  botToken: 'YOUR_BOT_TOKEN',
  chatId: 'YOUR_CHAT_ID',
  dio: Dio(),
  text: successMessage,
  logSuccessText: 'Success log sent',
  logFailText: 'Failed to send success log',
);

// Warning message
final warningMessage = TelegramMessageFormatter.createWarningTemplate(
  title: 'System Warning',
  message: 'System resources running low',
  details: 'RAM: 95%, Disk: 88%',
);

await TelegramMessageFormatter.sendHtmlMessage(
  botToken: 'YOUR_BOT_TOKEN',
  chatId: 'YOUR_CHAT_ID',
  dio: Dio(),
  text: warningMessage,
  logSuccessText: 'Warning sent',
  logFailText: 'Failed to send warning',
);

// Custom message with different formats
await TelegramMessageFormatter.sendCustomMessage(
  botToken: 'YOUR_BOT_TOKEN',
  chatId: 'YOUR_CHAT_ID',
  dio: Dio(),
  message: 'Hello! This is a custom message.',
  format: MessageFormat.html,
  logSuccessText: 'Custom message sent',
  logFailText: 'Failed to send custom message',
);

📋 Package Structure

error_logger_with_bot/
├── lib/
│   ├── error_logger_with_bot.dart          # Main export file
│   └── src/
│       ├── device_info.dart                # Device info collection
│       ├── telegram_logger.dart            # Main logger class
│       └── telegram_message_formatter.dart # Message formatting utilities
├── example/
│   ├── lib/
│   │   └── main.dart                       # Example application
│   └── pubspec.yaml
├── test/
├── pubspec.yaml
├── README.md
├── CHANGELOG.md
└── LICENSE

🔧 API Reference

TelegramLogger.init()

Initialize the package with your bot configuration:

TelegramLogger.init({
  required String botToken,    // Your Telegram bot token
  required String chatId,      // Chat ID (private or group)
  required String appName,     // Your application name
  String? logSuccessText,      // Custom success log message
  String? logFailText,         // Custom error log message
});

TelegramLogger.sendError()

Send detailed error reports:

await TelegramLogger.sendError({
  required DioException error,                    // The Dio exception
  required StackTrace stackTrace,                 // Stack trace
  required BuildContext? context,                 // Widget context
  bool includeScreenshot = false,                 // Screenshot (future feature)
  String Function(String, DateTime, String)? customTemplate,  // Custom template function
});

TelegramMessageFormatter Methods

Pre-built Templates:

createErrorTemplate() - Error message template
createSuccessTemplate() - Success message template
createWarningTemplate() - Warning message template

Message Sending:

sendHtmlMessage() - Send HTML formatted message
sendPlainText() - Send plain text message
sendCustomMessage() - Send message with custom format

Utility Methods:

escapeHtml() - Escape HTML special characters
escapeMarkdownV2() - Escape MarkdownV2 special characters
formatStackTrace() - Format stack trace for readability

📱 Example Application

Check out the example directory for a complete working application that demonstrates:

Basic error logging
Custom error templates
Success and warning messages
Different message formats
Group chat integration

🎯 Use Cases

API Error Monitoring: Automatically log API failures with request/response details
Crash Reporting: Send detailed crash reports with device information
User Activity Logging: Log important user actions and system events
Development Debugging: Get real-time error notifications during development
Production Monitoring: Monitor your app's health in production

🔒 Privacy & Security

No Data Storage: This package doesn't store any data locally or remotely
Direct Communication: Messages are sent directly to Telegram's servers
Configurable: You control what information is included in error reports
Open Source: Full source code is available for review

📝 Error Report Contents

The default error template includes:

Timestamp: Date and time of the error
Device Information: Device model, OS version
App Information: App version and build number
Network Details: URL, HTTP method, status code
Error Information: Error type and message
Request Data: Headers, query parameters, request body
Response Data: Response status and body
Stack Trace: Formatted and filtered stack trace

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Support

If you find this package helpful, please give it a ⭐ on GitHub and a 👍 on pub.dev!

For issues and feature requests, please use the GitHub Issues page.