@chinhui/niivue/src/logger.js

minimal webgl2 nifti image viewer

/**
 * @class Log
 * @type Log
 * @param {number} logLevel
 */
export const Log = function (logLevel) {
  // log levels:
  // - 'debug'
  // - 'info'
  // - 'warn'
  // - 'error'
  this.LOGGING_ON = true;
  this.LOGGING_OFF = false;
  this.LOG_PREFIX = "NiiVue:";
  this.logLevel = logLevel; // true or false

  //logs take the form of `NiiVue: <unix_time> ...arguments` when printed to the console
};

Log.prototype.getTimeStamp = function () {
  return `${this.LOG_PREFIX} `;
};

Log.prototype.debug = function () {
  if (this.logLevel === this.LOGGING_ON) {
    console.log(this.getTimeStamp(), "DEBUG", ...arguments);
  }
};

Log.prototype.info = function () {
  if (this.logLevel === this.LOGGING_ON) {
    console.log(this.getTimeStamp(), "INFO", ...arguments);
  }
};

Log.prototype.warn = function () {
  if (this.logLevel === this.LOGGING_ON) {
    console.warn(this.getTimeStamp(), "WARN", ...arguments);
  }
};

Log.prototype.error = function () {
  if (this.logLevel === this.LOGGING_ON) {
    console.error(this.getTimeStamp(), "ERROR", ...arguments);
  }
};

Log.prototype.setLogLevel = function (logLevel) {
  this.logLevel = logLevel;
};