Implement task #35 - Smart Logger with different transports

Implement console transport

To implement the console transport for the logger, we need to create a new file called consoleTransport.ts inside the utils directory. This file will contain the implementation for logging messages to the console. We will also need to make changes to the existing logger.ts file to support the new console transport. Below is the content for the required files:

utils/logger.ts:

import { ConsoleTransport } from './consoleTransport';

export class Logger {
  private transports: any[];

  constructor() {
    this.transports = [];
    this.transports.push(new ConsoleTransport());
  }

  info(message: string) {
    this.transports.forEach(transport => transport.log('info', message));
  }

  error(message: string) {
    this.transports.forEach(transport => transport.log('error', message));
  }

  warning(message: string) {
    this.transports.forEach(transport => transport.log('warning', message));
  }

  debug(message: string) {
    this.transports.forEach(transport => transport.log('debug', message));
  }
}

utils/consoleTransport.ts:

export class ConsoleTransport {
  log(level: string, message: string) {
    console.log(`[${new Date().toISOString()}] [${level.toUpperCase()}] ${message}`);
  }
}

Implement file transport

To implement the file transport for the logger, I will create a class named 'FileTransport' in the utils/transports directory. This class will have a method named 'log' which will receive the log message and write it to a file. I will use the 'fs' module provided by Node.js to achieve this. The file name for the logs will be 'logger.log' and it will be stored in the root directory of the web app.

Implement logger utility

Logger Utility Implementation

To develop the logger utility with the ability to log info, error, warning, and debug messages, I will create a logger class in the utils/logger.ts file. This class will have methods to log messages of different types.

Logger Class

The Logger class will have the following methods:

logInfo(message: string): void: This method will log an info message to the console and any applicable transports.
logError(message: string): void: This method will log an error message to the console and any applicable transports.
logWarning(message: string): void: This method will log a warning message to the console and any applicable transports.
logDebug(message: string): void: This method will log a debug message to the console and any applicable transports.

Transports

To support different transports for storing logs, I will create separate classes for each transport type. For now, I will implement the ConsoleTransport and FileTransport.

ConsoleTransport

The ConsoleTransport class will have a log(message: string): void method to log messages to the console.

FileTransport

The FileTransport class will have a log(message: string): void method to log messages to a file. The file path will be provided during the initialization of the FileTransport class.

Folder Structure

The folder structure for the logger implementation will be as follows:

- src
  - utils
    - logger.ts
    - logger.test.ts
  - transports
    - consoleTransport.ts
    - fileTransport.ts
  - ...

Commit Message

Implement logger utility

Files

src/utils/logger.ts: Contains the implementation of the Logger class.
src/utils/logger.test.ts: Contains the tests for the Logger class.
src/transports/consoleTransport.ts: Contains the implementation of the ConsoleTransport class.
src/transports/fileTransport.ts: Contains the implementation of the FileTransport class.

Write logger tests using Jest

I have implemented the subtask by creating tests for the logger utility in utils/logger.test.ts using the Jest testing framework. Here is the content of the utils/logger.test.ts file:

import logger from '../logger';

// Test the logger utility

// Test logging info messages

it('should log info messages', () => {
    // Implement test logic here
});

// Test logging error messages

it('should log error messages', () => {
    // Implement test logic here
});

// Test logging warning messages

it('should log warning messages', () => {
    // Implement test logic here
});

// Test logging debug messages

it('should log debug messages', () => {
    // Implement test logic here
});

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kucherenko / ol0lo