detect-environment/lib/parseOptions.js

Detect environments in JavaScript similar to the way Laravel does

'use strict';

var
    //
    extend  = require('extend'),

    /**
     *
     */
    defaultOptions = {

        /**
         *
         */
        'aliases' : {
            'development' : ['dev',  'd'],
            'local'       : ['loc',  'l'],
            'production'  : ['prod', 'p'],
            'testing'     : ['test', 't']
        },

        /**
         *
         */
        'baseEnv' : 'production',

        /**
         *
         */
        'baseName' : 'env',

        /**
         *
         */
        'hidden' : true,

        /**
         *
         */
        'extensions' : ['json', 'yml', 'yaml', ''],

        /**
         *
         */
        'fallback' : 'local',

        /**
         *
         */
        'shell' : false,

        /**
         *
         */
        'strict' : false

    },

    /**
     *
     */
    parseOptions = function parseOptions (options, callback) {

        //
        if (typeof options === 'function') {
            options = {
                'callback' : options
            };

        //
        } else if (options === true || options === false) {
            options = {
                'strict' : options
            };

        //
        } else if (typeof options === 'string') {

            //
            if (!options) {
                throw new TypeError('parseOptions:');
            }

            //
            options = {
                'fallback' : options
            };

        //
        } else if (options === null || options === undefined) {
            options = {};
        }

        //
        if (Object.prototype.toString.call(options) !== '[object Object]') {
            throw new TypeError('parseOptions:');
        }

        //
        options = extend(true, defaultOptions, options);

        //
        if (typeof callback === 'function') {
            options.callback = callback;
        }

        //
        return options;

    };

// Expose to node.js
module.exports = parseOptions;