ReferencingCountEvaluator.cs :  » Content-Management-Systems-CMS » Kooboo » Everest » CmsServices » DataRule » C# / CSharp Open Source

/*
Kooboo is a content management system based on ASP.NET MVC framework. Copyright 2009 Yardi Technology Limited.

This program is free software: you can redistribute it and/or modify it under the terms of the
GNU General Public License version 3 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program.
If not, see http://www.kooboo.com/gpl3/.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Everest.CmsServices.Models;
using Everest.CmsServices.MvcHelper;
using Everest.Library.ExtensionMethod;
namespace Everest.CmsServices.DataRule{
    public class ReferencingCountEvaluator : IDataRuleValueEvaluator
    {
        #region IDataRuleValueEvaluator Members

        public Everest.CmsServices.Models.DataRuleValueType RuleType
        {
            get { return DataRuleValueType.GetContentCountByCategory; }
        }

        public object Evaluate(DataRuleContext context, Everest.CmsServices.Models.Cms_DataRule dataRule, TimeSpan? cacheTime)
        {
            var contentKey = ReferenceEvaluatorHelper.GetContentKey(dataRule.ReferencingContentId, context.QueryString);

            if (string.IsNullOrEmpty(contentKey))
            {
                throw new ArgumentNullException("Reference ContentKey");
            }

            var folder = CachedData.GetLocalizedFolder(context.Application.ApplicationName, dataRule.FolderUUIDFromReference.Value);

            int contentId;
            if (int.TryParse(contentKey, out contentId))
            {
                return context.ContentService.GetContentCountByCategoryAndFolder(contentId, folder.FolderName, dataRule.ValueRule, context.QueryString,
                    cacheTime);
            }
            Guid guid;
            if (GuidHelper.TryParseGuid(contentKey, out guid))
            {
                return context.ContentService.GetContentCountByCategoryAndFolder(guid,
                 folder.FolderName, dataRule.ValueRule, context.QueryString, cacheTime);
            }
            var content = context.ContentService.GetContentByUserKey(contentKey, null);
            if (content == null)
            {
                throw new NullReferenceException(Resources.ContentByKeyNull);
            }
            return context.ContentService.GetContentCountByCategoryAndFolder((Guid)content["UUID"],
                folder.FolderName, dataRule.ValueRule, context.QueryString, cacheTime);
        }

        #endregion
    }
}