From ca3ef487fc6d6ce38131c925b02c219d3fdbc706 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Mon, 25 May 2015 01:26:39 +0200
Subject: [PATCH] Added WoltLab/WCF/List as a shim for Set

---
 wcfsetup/install/files/js/WoltLab/WCF/List.js | 112 ++++++++++++++++++
 wcfsetup/install/files/js/require.config.js   |   1 +
 2 files changed, 113 insertions(+)
 create mode 100644 wcfsetup/install/files/js/WoltLab/WCF/List.js

diff --git a/wcfsetup/install/files/js/WoltLab/WCF/List.js b/wcfsetup/install/files/js/WoltLab/WCF/List.js
new file mode 100644
index 0000000000..f79d54ae77
--- /dev/null
+++ b/wcfsetup/install/files/js/WoltLab/WCF/List.js
@@ -0,0 +1,112 @@
+/**
+ * List implementation relying on an array or if supported on a Set to hold values.
+ * 
+ * @author	Alexander Ebert
+ * @copyright	2001-2015 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @module	WoltLab/WCF/List
+ */
+define([], function() {
+	"use strict";
+	
+	var _hasSet = window.hasOwnProperty('Set') && typeof window.Set === 'function';
+	
+	/**
+	 * @constructor
+	 */
+	function List() {
+		this._set = (_hasSet) ? new Set() : [];
+	};
+	List.prototype = {
+		/**
+		 * Appends an element to the list, silently rejects adding an already existing value.
+		 * 
+		 * @param	{*}	value	unique element
+		 */
+		add: function(value) {
+			if (_hasSet) {
+				this._set.add(value);
+			}
+			else if (!this.has(value)) {
+				this._set.push(value);
+			}
+		},
+		
+		/**
+		 * Removes all elements from the list.
+		 */
+		clear: function() {
+			if (_hasSet) {
+				this._set.clear();
+			}
+			else {
+				this._set = [];
+			}
+		},
+		
+		/**
+		 * Removes an element from the list, returns true if the element was in the list.
+		 * 
+		 * @param	{*}		value	element
+		 * @return	{boolean}	true if element was in the list
+		 */
+		'delete': function(value) {
+			if (_hasSet) {
+				return this._set['delete'](value);
+			}
+			else {
+				var index = this._set.indexOf(index);
+				if (index === -1) {
+					return false;
+				}
+				
+				this._set.splice(index, 1);
+				return true;
+			}
+		},
+		
+		/**
+		 * Calls `callback` for each element in the list.
+		 */
+		forEach: function(callback) {
+			if (_hasSet) {
+				this._set.forEach(callback);
+			}
+			else {
+				for (var i = 0, length = this._set.length; i < length; i++) {
+					callback(this._set[i]);
+				}
+			}
+		},
+		
+		/**
+		 * Returns true if the list contains the element.
+		 * 
+		 * @param	{*}		value	element
+		 * @return	{boolean}	true if element is in the list
+		 */
+		has: function(value) {
+			if (_hasSet) {
+				return this._set.has(value);
+			}
+			else {
+				return (this._set.indexOf(value) !== -1);
+			}
+		}
+	};
+	
+	Object.defineProperty(List.prototype, 'size', {
+		enumerable: false,
+		configurable: true,
+		get: function() {
+			if (_hasMap) {
+				return this._set.size;
+			}
+			else {
+				return this._set.length;
+			}
+		}
+	});
+	
+	return List;
+});
diff --git a/wcfsetup/install/files/js/require.config.js b/wcfsetup/install/files/js/require.config.js
index 17a8071165..443999a248 100644
--- a/wcfsetup/install/files/js/require.config.js
+++ b/wcfsetup/install/files/js/require.config.js
@@ -17,6 +17,7 @@ requirejs.config({
 			'Environment': 'WoltLab/WCF/Environment',
 			'EventHandler': 'WoltLab/WCF/Event/Handler',
 			'Language': 'WoltLab/WCF/Language',
+			'List': 'WoltLab/WCF/List',
 			'ObjectMap': 'WoltLab/WCF/ObjectMap',
 			'UI/Alignment': 'WoltLab/WCF/UI/Alignment',
 			'UI/Dialog': 'WoltLab/WCF/UI/Dialog',
-- 
2.20.1