blockstack/src/logger.ts

The Blockstack Javascript library for authentication, identity, and storage.

import { config } from './config'

const levels = [
  'debug',
  'info',
  'warn',
  'error',
  'none'
]

const levelToInt: {[level: string]: number} = {}
const intToLevel: {[int: number]: string} = {}

for (let index = 0; index < levels.length; index++) {
  const level = levels[index]
  levelToInt[level] = index
  intToLevel[index] = level
}

/**
* @ignore
*/
export class Logger {
  static error(message: string) {
    if (!this.shouldLog('error')) return
    console.error(this.logMessage('error', message))
  }

  static warn(message: string) {
    if (!this.shouldLog('warn')) return
    console.warn(this.logMessage('warn', message))
  }

  static info(message: string) {
    if (!this.shouldLog('info')) return
    console.log(this.logMessage('info', message))
  }

  static debug(message: string) {
    if (!this.shouldLog('debug')) return
    console.log(this.logMessage('debug', message))
  }

  static logMessage(level: string, message: string) {
    return `[${level.toUpperCase()}] ${message}`
  }

  static shouldLog(level: string) {
    const currentLevel = levelToInt[config.logLevel]
    return currentLevel <= levelToInt[level]
  }
}