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# LoggerService TS

Simple and flexible logger service written in TypeScript. Provides environment-aware logging with levels and stage indicators.

## ✨ Features

- Support for log levels: `info`, `warn`, `error`, `debug`
- Optional `env` and `loggerPrefix` context
- Toggleable debug logging
- Uses `chalk` for colored logs
- Uses `moment` for timestamp formatting
- Optional `log stage` enum for marking start/end of operations

---

## 📦 Installation

```bash
npm install logger-services

🚀 How to Use

1. Import and Initialize

import {LoggerService, ELogStage, ELogLevels} from 'logger-services';

const logger = new LoggerService({
  env: 'dev', // 'dev' | 'uat' | 'staging' | 'prod'
  loggerPrefix: 'MyApp', // optional module name prefix
  app_debug: true, // enables debug logging
});

export {ELogStage, ELogLevels};
export default logger;

2. Logging Examples

logger.info('Application started');
logger.warn('This is a warning');
logger.error(new Error('Something went wrong'));
logger.debug('This is a debug message');

3. Using Log Stage Markers

logger.info(ELogStage.start, 'Starting job A');

// some process...

logger.info(ELogStage.end, 'Finished job A');

4. Toggle Configuration Dynamically

logger.init({
  env: 'prod',
  loggerPrefix: 'AuthService',
  app_debug: false,
});

🧰 API Reference

LoggerService

new LoggerService(config?: ILoggerConfig, clear?: boolean)

ILoggerConfig

| Field | Type | Description | | | | | | -------------- | --------- | ------------------------------ | ---------------------------- | ------ | ------ | -------------------------- | | env | `'dev' | 'uat' | 'staging' | 'prod' | null` | Optional environment label | | loggerPrefix | `string | null` | Optional module/service name | | | | | app_debug | boolean | Enables/disables debug logging | | | | |

Log Methods

| Method | Description | | ---------------- | ------------------------------------------- | | info(...args) | Logs info level messages | | warn(...args) | Logs warning messages | | error(...args) | Logs error messages and exceptions | | debug(...args) | Logs debug messages (if app_debug = true) |

ELogStage Enum

Helps mark the lifecycle stage of operations:

ELogStage.start // "[START]"
ELogStage.end   // "[END]"

🔧 Development

Build the project:

npm run build