1//------------------------------------------------------------------------------
  2// <copyright company="Tunynet">
  3//     Copyright (c) Tunynet Inc.  All rights reserved.
  4// </copyright> 
  5//------------------------------------------------------------------------------
  6
  7using System;
  8using System.Collections.Generic;
  9using System.Text;
 10using SpaceBuilder.Rss.Controls;
 11using TunyNet.Utils;
 12using SpaceBuilder.Components;
 13using SpaceBuilder.Blogs.Components;
 14using TunyNet.Data.Utils;
 15using TunyNet.Rss.Components;
 16using SpaceBuilder.Blogs.Configuration;
 17using SpaceBuilder.Configuration;
 18using System.Web;
 19
 20namespace SpaceBuilder.Blogs.Controls
 21...{
 22    /**//// <summary>
 23    /// 用于生成博客文章rss
 24    /// </summary>
 25    public class BlogPostRssHandler : BaseRssHandler
 26    ...{
 27        private int sectionID = -1;
 28        /**//// <summary>
 29        /// 博客SectionID
 30        /// </summary>
 31        public int SectionID
 32        ...{
 33            get ...{ return sectionID; }
 34            set ...{ sectionID = value; }
 35        }
 36
 37        private string appkey = null;
 38        /**//// <summary>
 39        /// ApplicationKey
 40        /// </summary>
 41        public string ApplicationKey
 42        ...{
 43            get ...{ return appkey; }
 44            set ...{ appkey = value; }
 45        }
 46
 47
 48        private string tagName = null;
 49        /**//// <summary>
 50        /// 标签名称
 51        /// </summary>
 52        public string TagName
 53        ...{
 54            get ...{ return tagName; }
 55            set ...{ tagName = value; }
 56        }
 57
 58        private Weblog currentBlog = null;
 59        /**//// <summary>
 60        /// 当前博客
 61        /// </summary>
 62        public Weblog CurrentBlog
 63        ...{
 64            get
 65            ...{
 66                if (currentBlog == null)
 67                ...{
 68                    if (SectionID > 0)
 69                        currentBlog = Weblogs.GetWeblog(SectionID);
 70                    else if (!ValueHelper.IsNullOrEmpty(ApplicationKey))
 71                        currentBlog = Weblogs.GetWeblog(ApplicationKey);
 72                }
 73
 74                return currentBlog;
 75            }
 76        }
 77
 78        /**//// <summary>        
 79        /// 获取完整的URL（例如： http://www.spacebuilder.cn/a/b.aspx）
 80        /// </summary>
 81        protected override string BaseUrl
 82        ...{
 83            get ...{ return WebUtils.HostPath(Context.Request.Url); }
 84        }
 85
 86        /**//// <summary>
 87        /// 缓存时间
 88        /// </summary>
 89        protected override int CacheTime
 90        ...{
 91            get ...{ return WeblogConfiguration.Instance().RssCacheWindowInSeconds; }
 92        }
 93
 94        /**//// <summary>
 95        /// 缓存标识
 96        /// </summary>
 97        protected override string CacheKey
 98        ...{
 99            get
100            ...{
101                if (!ValueHelper.IsNullOrEmpty(ApplicationKey))
102                ...{
103                    if (!ValueHelper.IsNullOrEmpty(TagName))
104                        return string.Format("Rss_BlogPosts:{0}:TagName:{1}", ApplicationKey, TagName);
105                    else
106                        return string.Format("Rss_BlogPosts:{0}:Individual", ApplicationKey);
107                }
108                else
109                ...{
110                    if (!ValueHelper.IsNullOrEmpty(TagName))
111                        return string.Format("Rss_BlogPosts:{0}:TagName:{1}", SectionID, TagName);
112                    else
113                        return string.Format("Rss_BlogPosts:{0}:Individual", SectionID);
114                }
115            }
116        }
117
118        /**//// <summary>
119        /// 处理Feed
120        /// </summary
121        protected override void ProcessFeed()
122        ...{
123            SBContext sbContext = SBContext.Current;
124            if (sbContext.GetIntFromQueryString("SectionID", -1) > 0)
125                this.SectionID = sbContext.GetIntFromQueryString("SectionID", -1);
126
127            this.ApplicationKey = sbContext.ApplicationKey;
128            this.TagName = sbContext.GetStringFromQueryString("TagName", string.Empty);
129
130            base.ProcessFeed();
131        }
132
133        /**//// <summary>
134        /// 创建Feed
135        /// </summary>
136        protected override TunyNet.Rss.Components.CachedFeed BuildFeed()
137        ...{
138            if (CurrentBlog == null)
139                return new TunyNet.Rss.Components.CachedFeed(DateTime.Now, null, string.Empty);
140
141            BlogThreadQuery query = new BlogThreadQuery();
142            query.SectionID = CurrentBlog.SectionID;
143
144            if (!ValueHelper.IsNullOrEmpty(TagName))
145                query.TagName = TagName;
146
147            query.IncludeTags = false;
148            query.PageSize = WeblogConfiguration.Instance().RssDefaultThreadsPerFeed;
149            query.SortBy = BlogThreadSortBy.MostRecent;
150            query.SortOrder = SortOrder.Descending;
151            query.IsPublicFilter = true;
152            query.IgnorePaging = true;
153            query.PostConfig = BlogPostConfig.IsAggregated;
154
155            PagingDataSet<BlogThread> threads = BlogPosts.GetBlogThreads(query);
156
157            RssDocument rssDoc = new RssDocument();
158            rssDoc.UseExternalNamespaces = true;
159            if (!ValueHelper.IsNullOrEmpty(StyleSheet))
160                rssDoc.StyleSheet = FormatUrl(VirtualPathUtility.ToAbsolute(StyleSheet));
161
162            RssChannel rssChannel = new RssChannel();
163            rssChannel.Title = CurrentBlog.SectionName;
164            rssChannel.Link = FormatUrl(UserUrls.Instance().BlogHome(currentBlog.ApplicationKey));
165            rssChannel.Description = CurrentBlog.Description;
166            rssChannel.Language = currentBlog.Langugage;
167            rssChannel.Generator = SBConfiguration.Instance().SpaceBuilderVersionInfo;
168
169            List<RssItem> rssItems = new List<RssItem>();
170
171            foreach (BlogThread thread in threads.Records)
172            ...{
173                RssItem item = new RssItem();
174                item.Title = WebUtils.HtmlDecode(thread.Subject);
175                item.Link = FormatUrl(BlogUrls.Instance().ShowPost(thread));
176                item.Author = thread.Author;
177                item.PubDate = thread.PostDate;
178
179                RssGuid guid = new RssGuid();
180                guid.IsPermaLink = false;
181                guid.Text = SiteSettingsManager.GetSiteSettings().SiteKey + ":Weblog:" + thread.PostID;
182                item.Guid = guid;
183
184                item.Comments = FormatUrl(BlogUrls.Instance().CommentsPage(CurrentBlog.ApplicationKey, thread.PostID));
185
186                if (WeblogConfiguration.Instance().TruncateAggregatePost)
187                    item.Description = HtmlUtils.TrimHtml(thread.Body, WeblogConfiguration.Instance().AggregatePostSize);
188                else
189                    item.Description = thread.Body;
190
191                //是否启用rss阅读计数
192                if (CurrentBlog.EnableAggBugs)
193                ...{
194                    item.Description = string.Format("{0}<img src=\"{1}\" width=\"1\" height=\"1\">", item.Description, FormatUrl(GlobalUrls.Instance().AggView(ViewObject.BlogThread, thread.PostID)));
195                }
196
197                item.ReplyCount = thread.ReplyCount;
198
199                rssItems.Add(item);
200            }
201
202            rssDoc.Channel = rssChannel;
203            rssChannel.Items = rssItems;
204
205            DateTime dt = threads.TotalRecords > 0 ? threads.Records[0].PostDate : DateTime.Now;
206
207            return new TunyNet.Rss.Components.CachedFeed(dt, null, rssDoc.ToXml());
208        }
209
210
211    }
212}
213