Admin import functional

Web/Utility/CustomExtensions.cs

@@ -3,9 +3,11 @@ using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Data.SqlTypes;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Reflection;
 using System.Text;
 using System.Web.Mvc;
+using MileageTraker.Web.Models;
 
 namespace MileageTraker.Web.Utility
 {
@@ -61,6 +63,47 @@ namespace MileageTraker.Web.Utility
 				});
 		}
 
+		public static Enum ParseWithDisplayNames(this Type enumType, string item)
+		{
+			Func<string, bool> f = s => string.Equals(s, item, StringComparison.CurrentCultureIgnoreCase);
+			return Enum.GetValues(enumType)
+			           .OfType<Enum>().First(e => e.GetAllNameVariants().Any(f));
+		}
+
+		public static bool IsValidValue(this Type enumType, string item)
+		{
+			Func<string, bool> f = s => string.Equals(s, item, StringComparison.CurrentCultureIgnoreCase);
+			return Enum.GetValues(enumType)
+					   .OfType<Enum>().Any(e => e.GetAllNameVariants().Any(f));
+		}
+
+		public static IEnumerable<string> GetAllNameVariants(this Enum enumeration)
+		{
+			yield return enumeration.ToString();
+			yield return enumeration.GetDisplayName();
+			yield return enumeration.GetDisplayShortName();
+		}
+
+		public static Expression<Func<Log, bool>> GetEqualsPredicate(this MileageLogType mileLogType)
+		{
+			Expression<Func<Log, bool>> predicate;
+			switch (mileLogType)
+			{
+				case MileageLogType.NonCommuting:
+					predicate = l => l.LogType.Value == 1;
+					break;
+				case MileageLogType.Commuting:
+					predicate = l => l.LogType.Value == 2;
+					break;
+				case MileageLogType.GasPurchase:
+					predicate = l => l.LogType.Value == 3;
+					break;
+				default:
+					throw new ArgumentOutOfRangeException();
+			}
+			return predicate;
+		}
+
 		public static IEnumerable<SelectListItem> ToSelectList(this Type enumType, string selectedItem, string noItemSelected)
 		{
 			var items = (from item in Enum.GetValues(enumType).OfType<Enum>()
@@ -99,6 +142,13 @@ namespace MileageTraker.Web.Utility
 			return value;
 		}
 
+		public static IEnumerable<string> GetPropertyNames(this Type type)
+		{
+			return 
+				from property in type.GetProperties()
+				select property.GetName();
+		}
+
 		public static bool IsSqlMinValue(this DateTime dt)
 		{
 			return dt == SqlDateTime.MinValue.Value;