sevomin/Sevomin.Models/Repositories/AdRepository.cs

using System.Collections;
using System.Collections.Generic;
using System.Linq;

namespace Sevomin.Models.Repositories
{
    public class AdRepository : IAdRepository
    {
        #region Singleton
        private static AdRepository member;
        private static object locker = new object();

        private AdRepository()
        {
        }

        static AdRepository()
        {
              lock (locker)
              {
                  member = new AdRepository();
              }
        }
        public static AdRepository Current
        {
            get
            {
                return member;
            }
        }
        #endregion

        #region AdRepository

        public IQueryable<Ad> ListAll()
        {
            return SevominDbContext.Current.Ads;
        }

        public void Add(Ad entity)
        {
            SevominDbContext.Current.Ads.Add(entity);
            Save();
        }

        public void Delete(Ad entity)
        {
            SevominDbContext.Current.Ads.Remove(entity);
            Save();
        }

        public Ad Find(long key)
        {
            return ListAll().SingleOrDefault(m => m.Id == key);
        }

        public void Save()
        {
            SevominDbContext.Current.SaveChanges();
        }

        public void ChangeDays(long id, int duration)
        {
            Find(id).Duration = duration;
            Save();
        }

        public void ToggleActive(long id)
        {
            Find(id).Active = !Find(id).Active;
            Save();
        }

        public IEnumerable<Ad> GetAds()
        {
            return ListAll().AsEnumerable().Where(m => m.Active && m.Expired == false);
        }

        #endregion
    }
}