Current Dev State

static/js/ketcher2/node_modules/when/pipeline.js

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+/** @license MIT License (c) copyright 2011-2013 original author or authors */
+
+/**
+ * pipeline.js
+ *
+ * Run a set of task functions in sequence, passing the result
+ * of the previous as an argument to the next.  Like a shell
+ * pipeline, e.g. `cat file.txt | grep 'foo' | sed -e 's/foo/bar/g'
+ *
+ * @author Brian Cavalier
+ * @author John Hann
+ */
+
+(function(define) {
+define(function(require) {
+
+	var when = require('./when');
+	var all = when.Promise.all;
+	var slice = Array.prototype.slice;
+
+	/**
+	 * Run array of tasks in a pipeline where the next
+	 * tasks receives the result of the previous.  The first task
+	 * will receive the initialArgs as its argument list.
+	 * @param tasks {Array|Promise} array or promise for array of task functions
+	 * @param [initialArgs...] {*} arguments to be passed to the first task
+	 * @return {Promise} promise for return value of the final task
+	 */
+	return function pipeline(tasks /* initialArgs... */) {
+		// Self-optimizing function to run first task with multiple
+		// args using apply, but subsequence tasks via direct invocation
+		var runTask = function(args, task) {
+			runTask = function(arg, task) {
+				return task(arg);
+			};
+
+			return task.apply(null, args);
+		};
+
+		return all(slice.call(arguments, 1)).then(function(args) {
+			return when.reduce(tasks, function(arg, task) {
+				return runTask(arg, task);
+			}, args);
+		});
+	};
+
+});
+})(typeof define === 'function' && define.amd ? define : function (factory) { module.exports = factory(require); });
+
+