Current Dev State

static/js/ketcher2/node_modules/when/keys.js

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+/** @license MIT License (c) copyright 2011-2013 original author or authors */
+
+/**
+ * Licensed under the MIT License at:
+ * http://www.opensource.org/licenses/mit-license.php
+ *
+ * @author Brian Cavalier
+ * @author John Hann
+ */
+(function(define) { 'use strict';
+define(function(require) {
+
+	var when = require('./when');
+	var Promise = when.Promise;
+	var toPromise = when.resolve;
+
+	return {
+		all: when.lift(all),
+		map: map,
+		settle: settle
+	};
+
+	/**
+	 * Resolve all the key-value pairs in the supplied object or promise
+	 * for an object.
+	 * @param {Promise|object} object or promise for object whose key-value pairs
+	 *  will be resolved
+	 * @returns {Promise} promise for an object with the fully resolved key-value pairs
+	 */
+	function all(object) {
+		var p = Promise._defer();
+		var resolver = Promise._handler(p);
+
+		var results = {};
+		var keys = Object.keys(object);
+		var pending = keys.length;
+
+		for(var i=0, k; i<keys.length; ++i) {
+			k = keys[i];
+			Promise._handler(object[k]).fold(settleKey, k, results, resolver);
+		}
+
+		if(pending === 0) {
+			resolver.resolve(results);
+		}
+
+		return p;
+
+		function settleKey(k, x, resolver) {
+			/*jshint validthis:true*/
+			this[k] = x;
+			if(--pending === 0) {
+				resolver.resolve(results);
+			}
+		}
+	}
+
+	/**
+	 * Map values in the supplied object's keys
+	 * @param {Promise|object} object or promise for object whose key-value pairs
+	 *  will be reduced
+	 * @param {function(value:*, key:String):*} f mapping function which may
+	 *  return either a promise or a value
+	 * @returns {Promise} promise for an object with the mapped and fully
+	 *  resolved key-value pairs
+	 */
+	function map(object, f) {
+		return toPromise(object).then(function(object) {
+			return all(Object.keys(object).reduce(function(o, k) {
+				o[k] = toPromise(object[k]).fold(mapWithKey, k);
+				return o;
+			}, {}));
+		});
+
+		function mapWithKey(k, x) {
+			return f(x, k);
+		}
+	}
+
+	/**
+	 * Resolve all key-value pairs in the supplied object and return a promise
+	 * that will always fulfill with the outcome states of all input promises.
+	 * @param {object} object whose key-value pairs will be settled
+	 * @returns {Promise} promise for an object with the mapped and fully
+	 *  settled key-value pairs
+	 */
+	function settle(object) {
+		var keys = Object.keys(object);
+		var results = {};
+
+		if(keys.length === 0) {
+			return toPromise(results);
+		}
+
+		var p = Promise._defer();
+		var resolver = Promise._handler(p);
+		var promises = keys.map(function(k) { return object[k]; });
+
+		when.settle(promises).then(function(states) {
+			populateResults(keys, states, results, resolver);
+		});
+
+		return p;
+	}
+
+	function populateResults(keys, states, results, resolver) {
+		for(var i=0; i<keys.length; i++) {
+			results[keys[i]] = states[i];
+		}
+		resolver.resolve(results);
+	}
+
+});
+})(typeof define === 'function' && define.amd ? define : function (factory) { module.exports = factory(require); });