darkness-dependent-vision/src/logger.js

// SPDX-FileCopyrightText: 2021 Johannes Loher
//
// SPDX-License-Identifier: MIT

const loggingContext = 'Darkness Dependent Vision';
const loggingSeparator = '|';

/**
 * Get a logging function for the requested log level.
 * @typedef {'debug' | 'info' | 'warn' | 'error'} LogLevel
 * @typedef {(...args: unknown[]) => void} LoggingFunction
 * @param {LogLevel} [type = 'info'] - The log level of the requested logger
 * @returns {LoggingFunction}
 */
function getLoggingFunction(type = 'info') {
  const log = console[type];
  return (...data) => log(loggingContext, loggingSeparator, ...data);
}

/**
 * A singleton logger object.
 */
const logger = Object.freeze({
  debug: getLoggingFunction('debug'),
  info: getLoggingFunction('info'),
  warn: getLoggingFunction('warn'),
  error: getLoggingFunction('error'),
  getLoggingFunction,
});

export default logger;