@nrchkb/logger NPM

@nrchkb/logger

Unified Logger for Node-RED nodes (using debug)

@nrchkb/logger

Install

npm i -d @nrchkb/logger

How to use

There are 3 types of messages:

Debug - for standard debug purpose.
Error - for printing errors, this level is enabled by default.
Trace - for printing detailed messaged.

Code

import {logger} from "@nrchkb/logger";

const log = logger('YOUR_NODE_SHORT_NAME')

log.debug('Debug message')
log.error('Error message')
log.trace('Trace message')

Start you app in with DEBUG env

DEBUG=YOUR_BASE_NAMESPACE* yourApp.js

If you want you can pass addional parameters to logger method to make its log message more detailed

// Having Node-RED node in context, node name is TestHTTPNode, id is 1234567890
let log
log = logger('BASE_NAMESPACE', 'OUT', 'HTTP')
//or
log = logger('BASE_NAMESPACE', 'OUT', this.name, this)

First argument is namespace prefix used in log message BASE_NAMESPACE:OUT Some Message
Second argument is suffix namespace used in log message BASE_NAMESPACE:OUT Some Message
Third is a message prefix BASE_NAMESPACE:OUT [HTTP] Some Message
Forth, if provided will override message prefix with node name and id BASE_NAMESPACE:OUT [TestHTTPNode:1234567890] Some Message

Customization

Parameters

let LOGGER_DEBUG_COLOR = process.env.LOGGER_DEBUG_COLOR || '4'
let LOGGER_ERROR_COLOR = process.env.LOGGER_ERROR_COLOR || '9'
let LOGGER_TRACE_COLOR = process.env.LOGGER_TRACE_COLOR || '15'

let LOGGER_DEBUG_ENABLED =
        process.env.LOGGER_DEBUG_ENABLED &&
        process.env.LOGGER_DEBUG_ENABLED === 'true'
let LOGGER_ERROR_ENABLED =
        (process.env.LOGGER_ERROR_ENABLED &&
                process.env.LOGGER_ERROR_ENABLED === 'true') ||
        true
let LOGGER_TRACE_ENABLED =
        process.env.LOGGER_TRACE_ENABLED &&
        process.env.LOGGER_TRACE_ENABLED === 'true'

let LOGGER_TIMESTAMP_ENABLED = process.env.LOGGER_TIMESTAMP_ENABLED || false

Colors are defined via numbers. Depending on which device you are running your app different range of colors will be available. Please refer to https://jonasjacek.github.io/colors/ for Xterm color list

All params listed above can be either changed with env variable or setup method

env parameter

For example to change debug logs color to pin

LOGGER_DEBUG_COLOR=13 DEBUG=MYAPP* yourApp.js

setup method

All params are optional, so you can choose which you want to change

import {loggerSetup} from "@nrchkb/logger";

loggerSetup({
    debugColor: '9',
    debugEnabled: false,
    errorColor: '10',
    errorEnabled: false,
    traceColor: '11',
    traceEnabled: false
})