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shrine-medco/shrine-webclient/src/main/html/node_modules/options/lib/options.js
f422d9cc2cdfrelease/1.22.1

options.js
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			/*!
			* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
			* MIT Licensed
			*/

			var fs = require('fs');

			function Options(defaults) {
			var internalValues = {};
			var values = this.value = {};
			Object.keys(defaults).forEach(function(key) {
			internalValues[key] = defaults[key];
			Object.defineProperty(values, key, {
			get: function() { return internalValues[key]; },
			configurable: false,
			enumerable: true
			});
			});
			this.reset = function() {
			Object.keys(defaults).forEach(function(key) {
			internalValues[key] = defaults[key];
			});
			return this;
			};
			this.merge = function(options, required) {
			options = options \|\| {};
			if (Object.prototype.toString.call(required) === '[object Array]') {
			var missing = [];
			for (var i = 0, l = required.length; i < l; ++i) {
			var key = required[i];
			if (!(key in options)) {
			missing.push(key);
			}
			}
			if (missing.length > 0) {
			if (missing.length > 1) {
			throw new Error('options ' +
			missing.slice(0, missing.length - 1).join(', ') + ' and ' +
			missing[missing.length - 1] + ' must be defined');
			}
			else throw new Error('option ' + missing[0] + ' must be defined');
			}
			}
			Object.keys(options).forEach(function(key) {
			if (key in internalValues) {
			internalValues[key] = options[key];
			}
			});
			return this;
			};
			this.copy = function(keys) {
			var obj = {};
			Object.keys(defaults).forEach(function(key) {
			if (keys.indexOf(key) !== -1) {
			obj[key] = values[key];
			}
			});
			return obj;
			};
			this.read = function(filename, cb) {
			if (typeof cb == 'function') {
			var self = this;
			fs.readFile(filename, function(error, data) {
			if (error) return cb(error);
			var conf = JSON.parse(data);
			self.merge(conf);
			cb();
			});
			}
			else {
			var conf = JSON.parse(fs.readFileSync(filename));
			this.merge(conf);
			}
			return this;
			};
			this.isDefined = function(key) {
			return typeof values[key] != 'undefined';
			};
			this.isDefinedAndNonNull = function(key) {
			return typeof values[key] != 'undefined' && values[key] !== null;
			};
			Object.freeze(values);
			Object.freeze(this);
			}

			module.exports = Options;