weblogrsshandler.cs

本系统是在asp版《在线文件管理器》的基础上设计制作

//------------------------------------------------------------------------------
// <copyright company="Telligent Systems">
//     Copyright (c) Telligent Systems Corporation.  All rights reserved.
// </copyright> 
//------------------------------------------------------------------------------

using System;

using CommunityServer.Components;

namespace CommunityServer.Blogs.Components
{
    /// <summary>
    /// Summary description for WeblogRssHandler.
    /// </summary>
    public class WeblogRssHandler : BaseWeblogSyndicationHandler
    {
        public WeblogRssHandler()
        {
            //
            // TODO: Add constructor logic here
            //
        }

        protected int CategoryID  = 0;

        protected override string CacheKey
        {
            get
            {
                if(CategoryID <= 0)
                    return string.Format("Weblog:{0}:IndividualRss",CurrentSection.SectionID);
                else
                    return string.Format("Weblog:{0}:CategoryRss{1}",CurrentSection.SectionID,CategoryID);
            }
        }

        protected override int CacheTime
        {
            get
            {
                return 90;
            }
        }

        /// <summary>
        /// Override Process feed to make sure  we check for a CategoryID Querystring
        /// </summary>
        protected override void ProcessFeed()
        {
            if(Context.Request.QueryString["CategoryID"] != null)
            {
                double cid = 0;
                if(Double.TryParse( Context.Request.QueryString["CategoryID"], System.Globalization.NumberStyles.Integer, null, out cid ))
                    this.CategoryID = (int)cid;
            }

            base.ProcessFeed ();
        }


        protected override CachedFeed BuildFeed()
        {
        	BlogThreadQuery query = CreateQuery();


        	ThreadSet threads = WeblogPosts.GetBlogThreads(query,true);
            BaseRssWriter writer = null;

            if(CategoryID <= 0)
                writer = new WeblogRssWriter(threads.Threads,this.CurrentWeblog,this.BaseUrl);
            else
            {
                PostCategory cat = PostCategories.GetCategory(CategoryID,CategoryType.BlogPost,CurrentSection.SectionID);
                writer = new WeblogCategoryRssWriter(threads.Threads,CurrentWeblog,this.BaseUrl,cat);
            }
            DateTime dt =  threads.Threads.Count > 0 ? ((WeblogPost)threads.Threads[0]).BloggerTime : DateTime.Now;
            
            return new CachedFeed(dt,null,writer.GetXml());

        }

    	protected virtual BlogThreadQuery CreateQuery()
    	{
    		BlogThreadQuery query = new BlogThreadQuery();
    		query.BlogPostType = BlogPostType.Post;
    		query.BlogID = CurrentSection.SectionID;
    		query.IncludeCategories = false;
    		query.PageIndex = 0;
    		query.PageSize = WeblogConfiguration.Instance().IndividualPostCount;
    		query.SortBy = BlogThreadSortBy.MostRecent;
    		query.SortOrder = SortOrder.Descending;
    		query.IsPublished = true;
    		query.IgnorePaging = true;

	
    		if(this.CategoryID > 0)
    			query.CategoryID = this.CategoryID;
    		else
    			query.PostConfig = BlogPostConfig.IsAggregated;
    		return query;
    	}


    }
}