Converts languages tree to new structure

src/Umbraco.Web/Trees/LanguageTreeController.cs

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+using System;
+using System.Globalization;
+using System.Net.Http.Formatting;
+using umbraco;
+using umbraco.BusinessLogic.Actions;
+using Umbraco.Core;
+using Umbraco.Web.Models.Trees;
+using Umbraco.Web.Mvc;
+using Umbraco.Web.WebApi.Filters;
+using Constants = Umbraco.Core.Constants;
+
+namespace Umbraco.Web.Trees
+{
+    [UmbracoTreeAuthorize(Constants.Trees.Languages)]
+    [LegacyBaseTree(typeof(loadLanguages))]
+    [Tree(Constants.Applications.Settings, Constants.Trees.Languages, "Languages")]
+    [PluginController("UmbracoTrees")]
+    [CoreTree]
+    public class LanguageTreeController : TreeController
+    {
+        /// <summary>
+        /// The method called to render the contents of the tree structure
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="queryStrings">
+        /// All of the query string parameters passed from jsTree
+        /// </param>
+        /// <remarks>
+        /// We are allowing an arbitrary number of query strings to be pased in so that developers are able to persist custom data from the front-end
+        /// to the back end to be used in the query for model data.
+        /// </remarks>
+        protected override TreeNodeCollection GetTreeNodes(string id, FormDataCollection queryStrings)
+        {
+            var nodes = new TreeNodeCollection();
+
+            if (id == Constants.System.Root.ToInvariantString())
+            {
+                var languages = Services.LocalizationService.GetAllLanguages();
+                foreach (var language in languages)
+                {
+                    nodes.Add(
+                        CreateTreeNode(
+                            language.Id.ToString(CultureInfo.InvariantCulture), "-1", queryStrings, language.CultureInfo.DisplayName, "icon-flag-alt", false,
+                            //TODO: Rebuild the language editor in angular, then we dont need to have this at all (which is just a path to the legacy editor)
+                            "/" + queryStrings.GetValue<string>("application") + "/framed/" +
+                            Uri.EscapeDataString("/umbraco/settings/editLanguage.aspx?id=" + language.Id)));
+                }
+            }
+            return nodes;
+        }
+
+        /// <summary>
+        /// Returns the menu structure for the node
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="queryStrings"></param>
+        /// <returns></returns>
+        protected override MenuItemCollection GetMenuForNode(string id, FormDataCollection queryStrings)
+        {
+            var menu = new MenuItemCollection();
+
+            if (id == Constants.System.Root.ToInvariantString())
+            {
+                //Create the normal create action
+                var createMenuItem = menu.Items.Add<ActionNew>(ui.Text("actions", ActionNew.Instance.Alias));
+                createMenuItem.LaunchDialogUrl("/umbraco/create.aspx?nodeId=init&nodeType=initlanguages&nodeName=Languages", ui.GetText("general", "create"));
+
+                //refresh action
+                menu.Items.Add<RefreshNode, ActionRefresh>(ui.Text("actions", ActionRefresh.Instance.Alias), true);
+
+                return menu;
+            }
+
+            //add delete option for all languages
+            menu.Items.Add<ActionDelete>(ui.Text("actions", ActionDelete.Instance.Alias));
+
+            return menu;
+        }
+    }
+}