DUSH-LOGGER

Easy, flexible, clean file logger for node

Installation

npm i dush-logger

npm install dush-logger

Documentation

Basic Use

const log = require('dush-logger');
let myVariable = true;

// Do Something
if (myVariable) {
  log.info('Variable `myVariable` is true');
} else {
  log.error('Variable `myVariable` is false');
}

Methods

log.<level>(message)

• level {String} The level to log a message at
• message {String} The log message

Enter a new log message

Examples

  
  // Below are the default log levels
  log.info('This is an info log message');
  log.notice('This is a notice log message');
  log.success('This is a success log message');
  log.warn('This is a warning log message');
  log.error('This is an error log message');
  log.debug('This is a debug log message');
  log.critical('This is is critical log message');
  log.verbose('This is a verbose log message');

log.createLevel(level, options)

• level {String}
• options {Object}
  • color: {String} Log level color(hex)
  • prefix: {String} String to be used as prefix of log message
  • file: {String} File path for the level

Create a new log level

// Create new level named server
log.createLevel('server', {prefix: 'SERV',color: '#28a745', file:'./logs/server.log'});

// Use the created level
log.server('New log messages under the server level');

log.clearLevel(level)

• level {String}

NB : Set level to 'main' to clear the main or default log file

Deletes all the log messages previously written under the level.

// Clearing the log file for the info level
log.clearLevel('info');

log.deleteLevel(level)

• level {String}

Deletes the log level ,any further attempt to use the level will result false and produce a message.

// Delete error level
log.deleteLevel('error');

// Trying to log a new message using the error level will result in an error
log.error('My new error log message');

log.viewLog(level)

• level {String}

Outputs previously written log messages to the console and returns the messages as an array

log.viewLog('critical');

log.init(options)

• options {Object}
  • file: {String} Set path for default log file
  • use_individual_files: {Boolean} true | false Set to true to write in level's independent files
  • levels: {Object} A showing level configurations including new levels
    • <level> {Object} Level configuration
      • color: {String} Log level color(hex)
      • prefix: {String} String to be used as prefix of log message
      • file: {String} File path for the level

Set options for log

/* Below are default options
{
file: './main.log',
use_individual_files: false,
dateFormat: 'nothing-yet',
levels: {
  info: {
    color:'#ffffff',
    prefix: 'INFO',
    file: 'logs/info.log'
  },
  debug: {
    color:'#1e7e34',
    prefix: 'DEBUG',
    file: 'logs/debug.log'
  },
  verbose: {
    color:'#28a745',
    prefix: 'VERBOSE',
    file: 'logs/verbose.log'
  },
  notice: {
    color:'#007bff',
    prefix: 'NOTICE',
    file: 'logs/notice.log'
  },
  success: {
    color:'#28a745',
    prefix: 'SUCCESS',
    file: 'logs/success.log'
  },
  warn: {
    color:'#ffc107',
    prefix: 'WARN',
    file: 'logs/warning.log'
  },
  error: {
    color:'#dc3545',
    prefix: 'ERROR',
    file: 'logs/error.log'
  },
  critical: {
    color:'#fd7e14',
    prefix: 'CRITIC',
    file: 'logs/critical.log'
  }
}*/

log.init({
    'use_individual_files': true,
    'levels': {
        'info': {
            'prefix': 'INFORMATION' 
        },
        'debug': {
            'prefix': 'DEBUGING',
            'file': './logs/debugger.log'
        }
    }
});

NB : Use the configuration file instead of log.init if you want to set override options across multiple files

log.setLogFile(level, file)

• level {String}
• file {String(path)}

Set the log file to be used for the level

log.setLogFile('info', './logs/info.log');

log.info('New info log message');

// The above log message will be written in the file ./logs/info.log instead of the default log file

Configuration File

Dush allows you to override default options using the dush configuration file. You simply create a dush-config.json file in the directory containing your node app file.

Example dush-config.json

{
  "use_individual_files": true,
  "levels": {
    "info": {
        "prefix": "INFORMATION"
    },
    "debug": {
        "prefix": "DEBUG",
        "file": "./logs/debug.log"
    }
  }
}