120 lines
2.2 KiB
JavaScript
120 lines
2.2 KiB
JavaScript
'use strict';
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/**
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* Is this value defined and not null?
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* @private
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*/
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const defined = function (val) {
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return typeof val !== 'undefined' && val !== null;
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};
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/**
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* Is this value an object?
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* @private
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*/
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const object = function (val) {
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return typeof val === 'object';
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};
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/**
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* Is this value a plain object?
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* @private
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*/
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const plainObject = function (val) {
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return Object.prototype.toString.call(val) === '[object Object]';
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};
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/**
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* Is this value a function?
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* @private
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*/
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const fn = function (val) {
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return typeof val === 'function';
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};
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/**
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* Is this value a boolean?
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* @private
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*/
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const bool = function (val) {
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return typeof val === 'boolean';
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};
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/**
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* Is this value a Buffer object?
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* @private
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*/
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const buffer = function (val) {
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return val instanceof Buffer;
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};
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/**
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* Is this value a non-empty string?
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* @private
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*/
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const string = function (val) {
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return typeof val === 'string' && val.length > 0;
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};
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/**
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* Is this value a real number?
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* @private
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*/
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const number = function (val) {
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return typeof val === 'number' && !Number.isNaN(val);
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};
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/**
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* Is this value an integer?
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* @private
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*/
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const integer = function (val) {
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return Number.isInteger(val);
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};
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/**
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* Is this value within an inclusive given range?
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* @private
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*/
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const inRange = function (val, min, max) {
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return val >= min && val <= max;
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};
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/**
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* Is this value within the elements of an array?
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* @private
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*/
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const inArray = function (val, list) {
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return list.includes(val);
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};
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/**
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* Create an Error with a message relating to an invalid parameter.
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*
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* @param {string} name - parameter name.
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* @param {string} expected - description of the type/value/range expected.
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* @param {*} actual - the value received.
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* @returns {Error} Containing the formatted message.
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* @private
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*/
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const invalidParameterError = function (name, expected, actual) {
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return new Error(
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`Expected ${expected} for ${name} but received ${actual} of type ${typeof actual}`
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);
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};
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module.exports = {
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defined: defined,
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object: object,
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plainObject: plainObject,
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fn: fn,
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bool: bool,
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buffer: buffer,
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string: string,
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number: number,
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integer: integer,
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inRange: inRange,
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inArray: inArray,
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invalidParameterError: invalidParameterError
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};
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