all files / src/validators/ type.js

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'use strict';
 
const isPlainObj = require('is-plain-obj');
 
/**
 * Determines whether or not the node's value is an Array
 * @param  {object} packageJsonData Valid JSON
 * @param  {string} nodeName        Name of a node in the package.json file
 * @return {boolean}                True if the node is an array or is missing. False if it is not.
 */
const isArray = function(packageJsonData, nodeName) {
  if (!packageJsonData.hasOwnProperty(nodeName)) {
    return true;
  }
 
  return Array.isArray(packageJsonData[nodeName]);
};
 
/**
 * Determines whether or not the node's value is a boolean
 * @param  {object} packageJsonData Valid JSON
 * @param  {string} nodeName        Name of a node in the package.json file
 * @return {boolean}                True if the node is a boolean or is missing. False if it is not.
 */
const isBoolean = function(packageJsonData, nodeName) {
  if (!packageJsonData.hasOwnProperty(nodeName)) {
    return true;
  }
 
  return typeof packageJsonData[nodeName] === 'boolean';
};
 
/**
 * Determines whether or not the node's value is an object
 * @param  {object} packageJsonData Valid JSON
 * @param  {string} nodeName        Name of a node in the package.json file
 * @return {boolean}                True if the node is an object or is missing. False if it is not.
 */
const isObject = function(packageJsonData, nodeName) {
  if (!packageJsonData.hasOwnProperty(nodeName)) {
    return true;
  }
 
  return isPlainObj(packageJsonData[nodeName]);
};
 
/**
 * Determines whether or not the node's value is a string
 * @param  {object} packageJsonData Valid JSON
 * @param  {string} nodeName        Name of a node in the package.json file
 * @return {boolean}                True if the node is a string or is missing. False if it is not.
 */
const isString = function(packageJsonData, nodeName) {
  if (!packageJsonData.hasOwnProperty(nodeName)) {
    return true;
  }
 
  return typeof packageJsonData[nodeName] === 'string';
};
 
module.exports.isArray = isArray;
module.exports.isBoolean = isBoolean;
module.exports.isObject = isObject;
module.exports.isString = isString;