sharp-error-handler/index.js

an error handler that integrates with Hapi/boom to manage all server errors through JSON file

"use strict";

const _ = require('lodash');
const boom = require('boom');

const customHapiError = function(error) {
  const boomifiedError = boom.boomify(error, { statusCode: error.statusCode });
  if(! _.isNil(error.extraFields)) {
    const invalidFieldErrorMsg = "Error Handler Error - the attribute extra fields should be an object";

    if(! _.isObject(error.extraFields)) {
      throw new Error(invalidFieldErrorMsg);
    }

    else if(_.isArray(error.extraFields)) {
      throw new Error(invalidFieldErrorMsg);           
    }

    else {
      boomifiedError.output.payload = _.merge(error.extraFields, boomifiedError.output.payload);
    }
  }

  return boomifiedError;
};

const createServerErrors = function (errorsData) {
  let Errors = _.mapValues(errorsData, (errorItem) => {
    return function(data) {
      this.constructor.prototype.__proto__ = Error.prototype;
      this.data = data;
      this.isCreatedServerError = true;

      _.forEach(errorItem, (value, key) => {
        this[key] = value;

        if(key === 'message') {
          this[key] = value + _.toString(data);
        }
      });

      Error.captureStackTrace(this, this.constructor);
    }
  });

  Errors = _.mapKeys(Errors, (value, key) => {
    return _.upperFirst(key);
  });

  return Errors;
};

const wrapError = function (loggerClass, error) {
  if(!_.isNil(loggerClass)) {
    try {
      loggerClass.log(error);
    }

    catch(err) {
      console.log('The logger class you provided doesn\'t have a log function');
    };
  }

  return customHapiError(error);
};

const wrapErrorWithTag = function (loggerClass, tag, error) {
  if(!_.isNil(loggerClass)) {
    try {
      loggerClass.log(tag, error);
    }

    catch(err) {
      console.log('The logger class you provided doesn\'t have a log function');
    };
  }

  return customHapiError(error);
};

module.exports = {
  wrapError,
  wrapErrorWithTag,
  createServerErrors
};