Exceptions.js

class ConfigurationError extends Error
{
  constructor(parameter, value)
  {
    super();

    this.code = 1;
    this.name = 'CONFIGURATION_ERROR';
    this.parameter = parameter;
    this.value = value;
    this.message = (!this.value)?
      `Missing parameter: ${this.parameter}` :
      `Invalid value ${JSON.stringify(this.value)} for parameter "${this.parameter}"`;
  }
}

class InvalidStateError extends Error
{
  constructor(status)
  {
    super();

    this.code = 2;
    this.name = 'INVALID_STATE_ERROR';
    this.status = status;
    this.message = `Invalid status: ${status}`;
  }
}

class NotSupportedError extends Error
{
  constructor(message)
  {
    super();

    this.code = 3;
    this.name = 'NOT_SUPPORTED_ERROR';
    this.message = message;
  }
}

class NotReadyError extends Error
{
  constructor(message)
  {
    super();

    this.code = 4;
    this.name = 'NOT_READY_ERROR';
    this.message = message;
  }
}

module.exports = {
  ConfigurationError,
  InvalidStateError,
  NotSupportedError,
  NotReadyError
};