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