update

node_modules/ultron/index.js

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+'use strict';
+
+var has = Object.prototype.hasOwnProperty;
+
+/**
+ * An auto incrementing id which we can use to create "unique" Ultron instances
+ * so we can track the event emitters that are added through the Ultron
+ * interface.
+ *
+ * @type {Number}
+ * @private
+ */
+var id = 0;
+
+/**
+ * Ultron is high-intelligence robot. It gathers intelligence so it can start improving
+ * upon his rudimentary design. It will learn from your EventEmitting patterns
+ * and exterminate them.
+ *
+ * @constructor
+ * @param {EventEmitter} ee EventEmitter instance we need to wrap.
+ * @api public
+ */
+function Ultron(ee) {
+  if (!(this instanceof Ultron)) return new Ultron(ee);
+
+  this.id = id++;
+  this.ee = ee;
+}
+
+/**
+ * Register a new EventListener for the given event.
+ *
+ * @param {String} event Name of the event.
+ * @param {Functon} fn Callback function.
+ * @param {Mixed} context The context of the function.
+ * @returns {Ultron}
+ * @api public
+ */
+Ultron.prototype.on = function on(event, fn, context) {
+  fn.__ultron = this.id;
+  this.ee.on(event, fn, context);
+
+  return this;
+};
+/**
+ * Add an EventListener that's only called once.
+ *
+ * @param {String} event Name of the event.
+ * @param {Function} fn Callback function.
+ * @param {Mixed} context The context of the function.
+ * @returns {Ultron}
+ * @api public
+ */
+Ultron.prototype.once = function once(event, fn, context) {
+  fn.__ultron = this.id;
+  this.ee.once(event, fn, context);
+
+  return this;
+};
+
+/**
+ * Remove the listeners we assigned for the given event.
+ *
+ * @returns {Ultron}
+ * @api public
+ */
+Ultron.prototype.remove = function remove() {
+  var args = arguments
+    , ee = this.ee
+    , event;
+
+  //
+  // When no event names are provided we assume that we need to clear all the
+  // events that were assigned through us.
+  //
+  if (args.length === 1 && 'string' === typeof args[0]) {
+    args = args[0].split(/[, ]+/);
+  } else if (!args.length) {
+    if (ee.eventNames) {
+      args = ee.eventNames();
+    } else if (ee._events) {
+      args = [];
+
+      for (event in ee._events) {
+        if (has.call(ee._events, event)) args.push(event);
+      }
+
+      if (Object.getOwnPropertySymbols) {
+        args = args.concat(Object.getOwnPropertySymbols(ee._events));
+      }
+    }
+  }
+
+  for (var i = 0; i < args.length; i++) {
+    var listeners = ee.listeners(args[i]);
+
+    for (var j = 0; j < listeners.length; j++) {
+      event = listeners[j];
+
+      //
+      // Once listeners have a `listener` property that stores the real listener
+      // in the EventEmitter that ships with Node.js.
+      //
+      if (event.listener) {
+        if (event.listener.__ultron !== this.id) continue;
+      } else if (event.__ultron !== this.id) {
+        continue;
+      }
+
+      ee.removeListener(args[i], event);
+    }
+  }
+
+  return this;
+};
+
+/**
+ * Destroy the Ultron instance, remove all listeners and release all references.
+ *
+ * @returns {Boolean}
+ * @api public
+ */
+Ultron.prototype.destroy = function destroy() {
+  if (!this.ee) return false;
+
+  this.remove();
+  this.ee = null;
+
+  return true;
+};
+
+//
+// Expose the module.
+//
+module.exports = Ultron;