REORG

src/Org/Extensions/EnumExtensions.cs

@@ -0,0 +1,88 @@
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Reflection;
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.Extensions.Localization;
+
+namespace Yavsc.Extensions
+{
+    public static class EnumExtensions
+    {
+        /// <summary>
+        /// Builds select items from an enum type
+        /// </summary>
+        /// <param name="type"></param>
+        /// <param name="SR"></param>
+        /// <param name="valueSelected"></param>
+        /// <returns></returns>
+        public static List<SelectListItem> GetSelectList (Type type, IStringLocalizer SR, Enum valueSelected)
+        {
+            var typeInfo = type.GetTypeInfo();
+            var values = Enum.GetValues(type).Cast<Enum>();
+            var items = new List<SelectListItem>();
+            
+            foreach (var value in values)
+            {
+                items.Add(new SelectListItem {
+                    Text = SR[GetDescription(value, typeInfo)],
+                    Value = value.ToString(),
+                    Selected = value == valueSelected
+                });
+            }
+            return items;
+        }
+        public static List<SelectListItem> GetSelectList (Type type, IStringLocalizer SR, string selectedValue = null)
+        {
+            var typeInfo = type.GetTypeInfo();
+            var values = Enum.GetValues(type).Cast<Enum>();
+            var items = new List<SelectListItem>();
+
+            foreach (var value in values)
+            {
+                var strval = value.ToString();
+
+                items.Add(new SelectListItem {
+                     Text = SR[GetDescription(value, typeInfo)],
+                     Value = strval,
+                     Selected = strval == selectedValue
+                });
+            }
+            return items;
+        }
+        public static string GetDescription(this Enum value, TypeInfo typeInfo )
+        {
+            var declaredMember = typeInfo.DeclaredMembers.FirstOrDefault(i => i.Name == value.ToString());
+            var attribute = declaredMember?.GetCustomAttribute<DisplayAttribute>();
+            return attribute == null ? value.ToString() : attribute.Description ?? attribute.Name;
+        }
+        public static string GetDescription(this Enum value)
+        {
+            var type = value.GetType();
+            var typeInfo = type.GetTypeInfo();
+            return GetDescription(value, typeInfo);
+        }
+
+        public static IEnumerable<string> GetDescriptions(Type type)
+        {
+            var values = Enum.GetValues(type).Cast<Enum>();
+            var descriptions = new List<string>();
+
+            foreach (var value in values)
+            {
+                descriptions.Add(value.GetDescription());
+            }
+
+            return descriptions;
+        }
+
+        public static Enum GetEnumFromDescription(string description, Type enumType)
+        {
+            var enumValues = Enum.GetValues(enumType).Cast<Enum>();
+            var descriptionToEnum = enumValues.ToDictionary(k => k.GetDescription(), v => v);
+            return descriptionToEnum[description];
+        }
+    }
+}