web/web/rss.cs

   1 //
   2 // RSS.cs: Some utility classes to generate RSS feeds
   3 //
   4 // (C) 2002 Miguel de Icaza (miguel@gnu.org)
   5 //
   6 //
   7 using System;
   8 using System.Xml;
   9 using System.IO;
  10
  11 namespace RSS {
  12
  13         public class Item {
  14                 XmlDocument doc;
  15                 XmlNode item;
  16                 XmlText title, link, description;
  17
  18                 public Item (XmlDocument doc, XmlNode item)
  19                 {
  20                         this.doc = doc;
  21                         this.item = item;
  22                 }
  23
  24                 XmlText MakeTextElement (string name)
  25                 {
  26                         XmlNode node = doc.CreateElement (name);
  27                         XmlText text = doc.CreateTextNode ("");
  28
  29                         item.AppendChild (node);
  30                         node.AppendChild (text);
  31
  32                         return text;
  33                 }
  34
  35                 public string Title {
  36                         get {
  37                                 if (title == null)
  38                                         return null;
  39
  40                                 return title.Value;
  41                         }
  42
  43                         set {
  44                                 if (title == null)
  45                                         title = MakeTextElement ("title");
  46                                 title.Value = value;
  47                         }
  48                 }
  49
  50                 public string Link {
  51                         get {
  52                                 if (link == null)
  53                                         return null;
  54
  55                                 return link.Value;
  56                         }
  57
  58                         set {
  59                                 if (link == null)
  60                                         link = MakeTextElement ("link");
  61                                 link.Value = value;
  62                         }
  63                 }
  64
  65                 public string Description {
  66                         get {
  67                                 if (description == null)
  68                                         return null;
  69
  70                                 return description.Value;
  71                         }
  72
  73                         set {
  74                                 if (description == null)
  75                                         description = MakeTextElement ("description");
  76                                 description.Value = value;
  77                         }
  78                 }
  79         }
  80
  81         public class Channel {
  82                 XmlDocument doc;
  83                 XmlNode channel;
  84                 XmlText title, link, description, language, pubDate, lastBuildDate;
  85                 XmlText managingEditor, webMaster;
  86
  87                 XmlText MakeTextElement (string name)
  88                 {
  89                         XmlNode node = doc.CreateElement (name);
  90                         XmlText text = doc.CreateTextNode ("");
  91
  92                         channel.AppendChild (node);
  93                         node.AppendChild (text);
  94
  95                         return text;
  96                 }
  97
  98                 public Channel (XmlDocument doc, XmlNode node)
  99                 {
 100                         this.channel = node;
 101                         this.doc = doc;
 102
 103                         title = MakeTextElement ("title");
 104                         link = MakeTextElement ("link");
 105                         description = MakeTextElement ("description");
 106                 }
 107
 108                 public Item NewItem ()
 109                 {
 110                         XmlNode node = doc.CreateElement ("item");
 111                         Item item;
 112
 113                         channel.AppendChild (node);
 114                         item = new Item (doc, node);
 115
 116                         return item;
 117                 }
 118
 119                 public string Title {
 120                         get {
 121                                 return title.Value;
 122                         }
 123
 124                         set {
 125                                 title.Value = value;
 126                         }
 127                 }
 128
 129                 public string Link {
 130                         get {
 131                                 return link.Value;
 132                         }
 133
 134                         set {
 135                                 link.Value = value;
 136                         }
 137                 }
 138
 139                 public string Description {
 140                         get {
 141                                 return description.Value;
 142                         }
 143
 144                         set {
 145                                 description.Value = value;
 146                         }
 147                 }
 148
 149 #region Optional Values
 150                 public string ManagingEditor {
 151                         get {
 152                                 if (managingEditor == null)
 153                                         return null;
 154
 155                                 return managingEditor.Value;
 156                         }
 157
 158                         set {
 159                                 if (managingEditor == null)
 160                                         managingEditor = MakeTextElement ("managingEditor");
 161
 162                                 managingEditor.Value = value;
 163                         }
 164                 }
 165
 166                 public string WebMaster {
 167                         get {
 168                                 if (webMaster == null)
 169                                         return null;
 170
 171                                 return webMaster.Value;
 172                         }
 173
 174                         set {
 175                                 if (webMaster == null)
 176                                         webMaster = MakeTextElement ("webMaster");
 177                                 webMaster.Value = value;
 178                         }
 179                 }
 180
 181                 public string PubDate {
 182                         get {
 183                                 if (pubDate == null)
 184                                         return null;
 185
 186                                 return pubDate.Value;
 187                         }
 188
 189                         set {
 190                                 if (pubDate == null)
 191                                         pubDate = MakeTextElement ("pubDate");
 192                                 pubDate.Value = value;
 193                         }
 194                 }
 195
 196                 public string LastBuildDate {
 197                         get {
 198                                 if (lastBuildDate == null)
 199                                         return null;
 200
 201                                 return lastBuildDate.Value;
 202                         }
 203
 204                         set {
 205                                 if (lastBuildDate == null)
 206                                         lastBuildDate = MakeTextElement ("lastBuildDate");
 207                                 lastBuildDate.Value = value;
 208                         }
 209                 }
 210
 211                 public string Language {
 212                         get {
 213                                 if (language == null)
 214                                         return null;
 215
 216                                 return language.Value;
 217                         }
 218
 219                         set {
 220                                 if (language == null)
 221                                         language = MakeTextElement ("language");
 222                                 language.Value = value;
 223                         }
 224                 }
 225 #endregion
 226         }
 227
 228         class RSS {
 229                 XmlDocument doc;
 230                 XmlNode rss;
 231
 232                 const string rss_base =
 233                 "<?xml version=\"1.0\"?> <rss version=\"0.92\"></rss>";
 234
 235                 public RSS ()
 236                 {
 237                         doc = new XmlDocument ();
 238
 239                         doc.LoadXml (rss_base);
 240                         rss = doc.DocumentElement;
 241                 }
 242
 243                 public Channel NewChannel (string title, string url)
 244                 {
 245                         XmlNode node = doc.CreateElement ("channel");
 246                         Channel c;
 247
 248                         rss.AppendChild (node);
 249                         c = new Channel (doc, node);
 250
 251                         return c;
 252                 }
 253
 254                 public XmlDocument XmlDocument {
 255                         get {
 256                                 return doc;
 257                         }
 258                 }
 259         }
 260 }
 261
 262