BuildFeed/BuildFeed/Code/DisplayHelpers.cs

using System;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;

namespace BuildFeed.Code
{
    public static class MvcExtensions
    {
        public static IHtmlString CheckboxListForEnum<T>(this HtmlHelper html, string id, T currentItem)
            where T : struct
        {
            StringBuilder sb = new StringBuilder();

            foreach (T enumItem in Enum.GetValues(typeof(T)).Cast<T>())
            {
                long enumValue = Convert.ToInt64(enumItem);
                long currentValue = Convert.ToInt64(currentItem);

                if (enumValue == 0)
                {
                    // skip 0-valued bitflags, they're for display only.
                    continue;
                }

                TagBuilder wrapper = new TagBuilder("div");
                wrapper.Attributes.Add("class", "checkbox");

                TagBuilder label = new TagBuilder("label");

                TagBuilder input = new TagBuilder("input");
                if ((enumValue & currentValue) != 0)
                {
                    input.MergeAttribute("checked", "checked");
                }
                input.MergeAttribute("type", "checkbox");
                input.MergeAttribute("value", enumValue.ToString());
                input.MergeAttribute("name", id);

                label.InnerHtml = input.ToString(TagRenderMode.SelfClosing);
                label.InnerHtml += GetDisplayTextForEnum(enumItem);

                wrapper.InnerHtml = label.ToString(TagRenderMode.Normal);

                sb.Append(wrapper.ToString(TagRenderMode.Normal));
            }

            return new HtmlString(sb.ToString());
        }

        public static string GetDisplayTextForEnum(object o)
        {
            string result = null;
            DisplayAttribute display = o.GetType()
                .GetMember(o.ToString())
                .First()
                .GetCustomAttributes(false)
                .OfType<DisplayAttribute>()
                .LastOrDefault();

            if (display != null)
            {
                result = display.GetName();
            }

            return result ?? o.ToString();
        }

        public static string GetDisplayDescriptionForEnum(object o)
        {
            string result = null;
            DisplayAttribute display = o.GetType()
                .GetMember(o.ToString())
                .First()
                .GetCustomAttributes(false)
                .OfType<DisplayAttribute>()
                .LastOrDefault();

            if (display != null)
            {
                result = display.GetDescription() ?? display.GetName();
            }

            return result ?? o.ToString();
        }

        public static string ToLongDateWithoutDay(this DateTime dt)
        {
            string s = CultureInfo.CurrentUICulture.DateTimeFormat.LongDatePattern;
            s = s.Replace("dddd", "").Replace("ddd", "");
            s = s.Trim(' ', ',');

            return dt.ToString(s);
        }
    }
}