https://dev.azure.com/umbraco/D-Team%20Tracker/_workitems/edit/6586 - Migrated DashboardController and BackOfficeAssetsController

src/Umbraco.Web.BackOffice/Controllers/BackOfficeAssetsController.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using Umbraco.Core.Configuration;
+using Umbraco.Core.IO;
+using Umbraco.Core.Logging;
+using Umbraco.Web.Common.Attributes;
+
+namespace Umbraco.Web.Editors
+{
+    [PluginController("UmbracoApi")]
+    public class BackOfficeAssetsController : UmbracoAuthorizedJsonController
+    {
+        private readonly IFileSystem _jsLibFileSystem;
+
+        public BackOfficeAssetsController(IIOHelper ioHelper, ILogger logger, IGlobalSettings globalSettings)
+        {
+            _jsLibFileSystem = new PhysicalFileSystem(ioHelper, logger, globalSettings.UmbracoPath + Path.DirectorySeparatorChar + "lib");
+        }
+
+        [HttpGet]
+        public object GetSupportedLocales()
+        {
+            const string momentLocaleFolder = "moment";
+            const string flatpickrLocaleFolder = "flatpickr/l10n";
+
+            return new
+            {
+                moment = GetLocales(momentLocaleFolder),
+                flatpickr = GetLocales(flatpickrLocaleFolder)
+            };
+        }
+
+        private IEnumerable<string> GetLocales(string path)
+        {
+            var cultures = _jsLibFileSystem.GetFiles(path, "*.js").ToList();
+            for (var i = 0; i < cultures.Count; i++)
+            {
+                cultures[i] = cultures[i]
+                    .Substring(cultures[i].IndexOf(path, StringComparison.Ordinal) + path.Length + 1);
+            }
+            return cultures;
+        }
+    }
+}