//============================================================
// ICOMPARABLE IMPLEMENTATION
//============================================================
#region CompareTo(object obj)
/// <summary>
/// Compares the current instance with another object of the same type.
/// </summary>
/// <param name="obj">An object to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>
/// <exception cref="ArgumentException">The <paramref name="obj"/> is not the expected <see cref="Type"/>.</exception>
public int CompareTo(object obj)
{
//------------------------------------------------------------
// If target is a null reference, instance is greater
//------------------------------------------------------------
if (obj == null)
{
return(1);
}
//------------------------------------------------------------
// Determine comparison result using property state of objects
//------------------------------------------------------------
RssEnclosure value = obj as RssEnclosure;
if (value != null)
{
int result = String.Compare(this.ContentType, value.ContentType, StringComparison.OrdinalIgnoreCase);
result = result | this.Length.CompareTo(value.Length);
result = result | Uri.Compare(this.Url, value.Url, UriComponents.AbsoluteUri, UriFormat.SafeUnescaped, StringComparison.OrdinalIgnoreCase);
return(result);
}
else
{
throw new ArgumentException(String.Format(null, "obj is not of type {0}, type was found to be '{1}'.", this.GetType().FullName, obj.GetType().FullName), "obj");
}
}
/// <summary>
/// Compares the current instance with another object of the same type.
/// </summary>
/// <param name="obj">An object to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>
/// <exception cref="ArgumentException">The <paramref name="obj"/> is not the expected <see cref="Type"/>.</exception>
public int CompareTo(object obj)
{
if (obj == null)
{
return(1);
}
RssEnclosure value = obj as RssEnclosure;
if (value != null)
{
int result = String.Compare(this.ContentType, value.ContentType, StringComparison.OrdinalIgnoreCase);
result = result | this.Length.CompareTo(value.Length);
result = result | Uri.Compare(this.Url, value.Url, UriComponents.AbsoluteUri, UriFormat.SafeUnescaped, StringComparison.OrdinalIgnoreCase);
return(result);
}
else
{
throw new ArgumentException(String.Format(null, "obj is not of type {0}, type was found to be '{1}'.", this.GetType().FullName, obj.GetType().FullName), "obj");
}
}
private void RenderRss()
{
Argotic.Syndication.RssFeed feed = new Argotic.Syndication.RssFeed();
RssChannel channel = new RssChannel();
channel.Generator = "mojoPortal Blog Module";
channel.Language = SiteUtils.GetDefaultCulture();
feed.Channel = channel;
if (module.ModuleTitle.Length > 0)
{
channel.Title = module.ModuleTitle;
}
else
{
channel.Title = "Blog"; // it will cause an error if this is left blank so we must populate it if the module title is an emty string.
}
// this became broken when we combined query string params, since pageid is not one of the params this always returns the home page url
// instead of the blog page url
//string pu = WebUtils.ResolveServerUrl(SiteUtils.GetCurrentPageUrl());
string pu = WebUtils.ResolveServerUrl(SiteUtils.GetPageUrl(pageSettings));
channel.Link = new System.Uri(pu);
channel.SelfLink = Request.Url;
if (config.ChannelDescription.Length > 0) { channel.Description = config.ChannelDescription; }
if (config.Copyright.Length > 0) { channel.Copyright = config.Copyright; }
channel.ManagingEditor = config.ManagingEditorEmail;
if (config.ManagingEditorName.Length > 0)
{
channel.ManagingEditor += " (" + config.ManagingEditorName + ")";
}
if (config.FeedTimeToLive > -1) { channel.TimeToLive = config.FeedTimeToLive; }
// Create and add iTunes information to feed channel
ITunesSyndicationExtension channelExtension = new ITunesSyndicationExtension();
channelExtension.Context.Subtitle = config.ChannelDescription;
if (config.HasExplicitContent)
{
channelExtension.Context.ExplicitMaterial = ITunesExplicitMaterial.Yes;
}
else
{
channelExtension.Context.ExplicitMaterial = ITunesExplicitMaterial.No;
}
channelExtension.Context.Author = config.ManagingEditorEmail;
if (config.ManagingEditorName.Length > 0)
{
channelExtension.Context.Author += " (" + config.ManagingEditorName + ")";
}
channelExtension.Context.Summary = config.ChannelDescription;
channelExtension.Context.Owner = new ITunesOwner(config.ManagingEditorEmail, config.ManagingEditorName);
if (config.FeedLogoUrl.Length > 0)
{
try
{
channelExtension.Context.Image = new Uri(config.FeedLogoUrl);
}
catch (ArgumentNullException) { }
catch (UriFormatException) { }
}
if (config.FeedMainCategory.Length > 0)
{
ITunesCategory mainCat = new ITunesCategory(config.FeedMainCategory);
if (config.FeedSubCategory.Length > 0)
{
mainCat.Categories.Add(new ITunesCategory(config.FeedSubCategory));
}
channelExtension.Context.Categories.Add(mainCat);
}
feed.Channel.AddExtension(channelExtension);
DataSet dsBlogPosts = GetData();
DataTable posts = dsBlogPosts.Tables["Posts"];
foreach (DataRow dr in posts.Rows)
{
bool inFeed = Convert.ToBoolean(dr["IncludeInFeed"]);
if (!inFeed) { continue; }
RssItem item = new RssItem();
int itemId = Convert.ToInt32(dr["ItemID"]);
string blogItemUrl = FormatBlogUrl(dr["ItemUrl"].ToString(), itemId);
item.Link = new Uri(Request.Url, blogItemUrl);
item.Guid = new RssGuid(blogItemUrl);
item.Title = dr["Heading"].ToString();
item.PublicationDate = Convert.ToDateTime(dr["StartDate"]);
bool showAuthor = Convert.ToBoolean(dr["ShowAuthorName"]);
if (showAuthor)
{
// techically this is supposed to be an email address
// but wouldn't that lead to a lot of spam?
string authorEmail = dr["Email"].ToString();
string authorName = dr["Name"].ToString();
if (BlogConfiguration.IncludeAuthorEmailInFeed)
{
item.Author = authorEmail + " (" + authorName + ")";
}
else
{
item.Author = authorName;
}
}
else if (config.ManagingEditorEmail.Length > 0)
{
item.Author = config.ManagingEditorEmail;
}
item.Comments = new Uri(blogItemUrl);
string signature = string.Empty;
if (config.AddSignature)
{
signature = "<br /><a href='" + blogItemUrl + "'>" + dr["Name"].ToString() + "</a>";
}
if ((config.AddCommentsLinkToFeed) && (config.AllowComments))
{
signature += " " + "<a href='" + blogItemUrl + "'>...</a>";
}
if (config.AddTweetThisToFeed)
{
signature += GenerateTweetThisLink(item.Title, blogItemUrl);
}
if (config.AddFacebookLikeToFeed)
{
signature += GenerateFacebookLikeButton(blogItemUrl);
}
string blogPost = SiteUtils.ChangeRelativeUrlsToFullyQualifiedUrls(navigationSiteRoot, imageSiteRoot, dr["Description"].ToString().RemoveCDataTags());
string staticMapLink = BuildStaticMapMarkup(dr);
if (staticMapLink.Length > 0)
{
// add a google static map
blogPost += staticMapLink;
}
if ((!config.UseExcerptInFeed) || (blogPost.Length <= config.ExcerptLength))
{
item.Description = blogPost + signature;
}
else
{
string excerpt = SiteUtils.ChangeRelativeUrlsToFullyQualifiedUrls(navigationSiteRoot, imageSiteRoot, dr["Abstract"].ToString().RemoveCDataTags());
if ((excerpt.Length > 0) && (excerpt != "<p> </p>"))
{
excerpt = excerpt
+ config.ExcerptSuffix
+ " <a href='"
+ blogItemUrl + "'>" + config.MoreLinkText + "</a><div class='excerptspacer'> </div>";
}
else
{
excerpt = UIHelper.CreateExcerpt(dr["Description"].ToString(), config.ExcerptLength, config.ExcerptSuffix)
+ " <a href='"
+ blogItemUrl + "'>" + config.MoreLinkText + "</a><div class='excerptspacer'> </div>"; ;
}
item.Description = excerpt;
}
// how to add media enclosures for podcasting
//http://www.podcast411.com/howto_1.html
//http://argotic.codeplex.com/wikipage?title=Generating%20an%20extended%20RSS%20feed
//http://techwhimsy.com/stream-mp3s-with-google-mp3-player
//Uri url = new Uri("http://media.libsyn.com/media/podcast411/411_060325.mp3");
//string type = "audio/mpeg";
//long length = 11779397;
string blogGuid = dr["BlogGuid"].ToString();
string whereClause = string.Format("ItemGuid = '{0}'", blogGuid);
if (!config.UseExcerptInFeed)
{
DataView dv = new DataView(dsBlogPosts.Tables["Attachments"], whereClause, "", DataViewRowState.CurrentRows);
foreach (DataRowView rowView in dv)
{
DataRow row = rowView.Row;
Uri mediaUrl = new Uri(WebUtils.ResolveServerUrl(attachmentBaseUrl + row["ServerFileName"].ToString()));
long contentLength = Convert.ToInt64(row["ContentLength"]);
string contentType = row["ContentType"].ToString();
RssEnclosure enclosure = new RssEnclosure(contentLength, contentType, mediaUrl);
item.Enclosures.Add(enclosure);
//http://argotic.codeplex.com/wikipage?title=Generating%20an%20extended%20RSS%20feed
ITunesSyndicationExtension itemExtension = new ITunesSyndicationExtension();
itemExtension.Context.Author = dr["Name"].ToString();
itemExtension.Context.Subtitle = dr["SubTitle"].ToString();
//itemExtension.Context.Summary = "The iTunes syndication extension properties that are used vary based on whether extending the channel or an item";
//itemExtension.Context.Duration = new TimeSpan(1, 2, 13);
//itemExtension.Context.Keywords.Add("Podcast");
//itemExtension.Context.Keywords.Add("iTunes");
whereClause = string.Format("ItemID = '{0}'", itemId);
DataView dvCat = new DataView(dsBlogPosts.Tables["Categories"], whereClause, "", DataViewRowState.CurrentRows);
foreach (DataRowView rView in dvCat)
{
DataRow r = rView.Row;
item.Categories.Add(new RssCategory(r["Category"].ToString()));
itemExtension.Context.Keywords.Add(r["Category"].ToString());
}
item.AddExtension(itemExtension);
}
}
channel.AddItem(item);
}
if ((config.FeedburnerFeedUrl.Length > 0) || (Request.Url.AbsolutePath.Contains("localhost")))
{
Response.Cache.SetExpires(DateTime.Now.AddMinutes(-30));
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.VaryByParams["r"] = true;
}
else
{
Response.Cache.SetExpires(DateTime.Now.AddMinutes(30));
Response.Cache.SetCacheability(HttpCacheability.Public);
}
Response.ContentType = "application/xml";
Encoding encoding = new UTF8Encoding();
Response.ContentEncoding = encoding;
using (XmlTextWriter xmlTextWriter = new XmlTextWriter(Response.OutputStream, encoding))
{
xmlTextWriter.Formatting = Formatting.Indented;
//////////////////
// style for RSS Feed viewed in browsers
if (ConfigurationManager.AppSettings["RSSCSS"] != null)
{
string rssCss = ConfigurationManager.AppSettings["RSSCSS"].ToString();
xmlTextWriter.WriteWhitespace(" ");
xmlTextWriter.WriteRaw("<?xml-stylesheet type=\"text/css\" href=\"" + cssBaseUrl + rssCss + "\" ?>");
}
if (ConfigurationManager.AppSettings["RSSXsl"] != null)
{
string rssXsl = ConfigurationManager.AppSettings["RSSXsl"].ToString();
xmlTextWriter.WriteWhitespace(" ");
xmlTextWriter.WriteRaw("<?xml-stylesheet type=\"text/xsl\" href=\"" + cssBaseUrl + rssXsl + "\" ?>");
}
///////////////////////////
feed.Save(xmlTextWriter);
}
}
/// <summary>
/// Loads this <see cref="RssItem"/> using the supplied <see cref="XPathNavigator"/> and <see cref="SyndicationResourceLoadSettings"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> used to configure the load operation.</param>
/// <returns><b>true</b> if the <see cref="RssItem"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="RssItem"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
public bool Load(XPathNavigator source, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
bool wasLoaded = false;
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(source, "source");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Create namespace resolver
//------------------------------------------------------------
XmlNamespaceManager manager = new XmlNamespaceManager(source.NameTable);
//------------------------------------------------------------
// Attempt to extract syndication information
//------------------------------------------------------------
XPathNavigator authorNavigator = source.SelectSingleNode("author", manager);
XPathNavigator commentsNavigator = source.SelectSingleNode("comments", manager);
XPathNavigator descriptionNavigator = source.SelectSingleNode("description", manager);
XPathNavigator guidNavigator = source.SelectSingleNode("guid", manager);
XPathNavigator linkNavigator = source.SelectSingleNode("link", manager);
XPathNavigator publicationNavigator = source.SelectSingleNode("pubDate", manager);
XPathNavigator sourceNavigator = source.SelectSingleNode("source", manager);
XPathNavigator titleNavigator = source.SelectSingleNode("title", manager);
XPathNodeIterator categoryIterator = source.Select("category", manager);
XPathNodeIterator enclosureIterator = source.Select("enclosure", manager);
//------------------------------------------------------------
// Load required/common item elements
//------------------------------------------------------------
if (titleNavigator != null)
{
this.Title = titleNavigator.Value;
wasLoaded = true;
}
if (descriptionNavigator != null)
{
this.Description = descriptionNavigator.Value;
wasLoaded = true;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
this.Link = link;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load optional item elements
//------------------------------------------------------------
if (authorNavigator != null)
{
this.Author = authorNavigator.Value;
wasLoaded = true;
}
if (commentsNavigator != null)
{
Uri comments;
if (Uri.TryCreate(commentsNavigator.Value, UriKind.RelativeOrAbsolute, out comments))
{
this.Comments = comments;
wasLoaded = true;
}
}
if (guidNavigator != null)
{
RssGuid guid = new RssGuid();
if (guid.Load(guidNavigator, settings))
{
this.Guid = guid;
wasLoaded = true;
}
}
if (publicationNavigator != null)
{
DateTime publicationDate;
if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
{
this.PublicationDate = publicationDate;
wasLoaded = true;
}
}
if (sourceNavigator != null)
{
RssSource sourceFeed = new RssSource();
if (sourceFeed.Load(sourceNavigator, settings))
{
this.Source = sourceFeed;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load item collection elements
//------------------------------------------------------------
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
if (category.Load(categoryIterator.Current, settings))
{
this.Categories.Add(category);
}
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
if (enclosure.Load(enclosureIterator.Current, settings))
{
this.Enclosures.Add(enclosure);
}
}
}
//------------------------------------------------------------
// Attempt to extract syndication extension information
//------------------------------------------------------------
SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(source, settings);
adapter.Fill(this);
return(wasLoaded);
}
/// <summary>
/// Loads this <see cref="RssItem"/> using the supplied <see cref="XPathNavigator"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <returns><b>true</b> if the <see cref="RssItem"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="RssItem"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
public bool Load(XPathNavigator source)
{
bool wasLoaded = false;
Guard.ArgumentNotNull(source, "source");
XmlNamespaceManager manager = new XmlNamespaceManager(source.NameTable);
XPathNavigator authorNavigator = source.SelectSingleNode("author", manager);
XPathNavigator commentsNavigator = source.SelectSingleNode("comments", manager);
XPathNavigator descriptionNavigator = source.SelectSingleNode("description", manager);
XPathNavigator guidNavigator = source.SelectSingleNode("guid", manager);
XPathNavigator linkNavigator = source.SelectSingleNode("link", manager);
XPathNavigator publicationNavigator = source.SelectSingleNode("pubDate", manager);
XPathNavigator sourceNavigator = source.SelectSingleNode("source", manager);
XPathNavigator titleNavigator = source.SelectSingleNode("title", manager);
XPathNodeIterator categoryIterator = source.Select("category", manager);
XPathNodeIterator enclosureIterator = source.Select("enclosure", manager);
if (titleNavigator != null)
{
this.Title = titleNavigator.Value;
wasLoaded = true;
}
if (descriptionNavigator != null)
{
this.Description = descriptionNavigator.Value;
wasLoaded = true;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
this.Link = link;
wasLoaded = true;
}
}
if (authorNavigator != null)
{
this.Author = authorNavigator.Value;
wasLoaded = true;
}
if (commentsNavigator != null)
{
Uri comments;
if (Uri.TryCreate(commentsNavigator.Value, UriKind.RelativeOrAbsolute, out comments))
{
this.Comments = comments;
wasLoaded = true;
}
}
if (guidNavigator != null)
{
RssGuid guid = new RssGuid();
if (guid.Load(guidNavigator))
{
this.Guid = guid;
wasLoaded = true;
}
}
if (publicationNavigator != null)
{
DateTime publicationDate;
if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
{
this.PublicationDate = publicationDate;
wasLoaded = true;
}
}
if (sourceNavigator != null)
{
RssSource sourceFeed = new RssSource();
if (sourceFeed.Load(sourceNavigator))
{
this.Source = sourceFeed;
wasLoaded = true;
}
}
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
if (category.Load(categoryIterator.Current))
{
this.Categories.Add(category);
}
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
if (enclosure.Load(enclosureIterator.Current))
{
this.Enclosures.Add(enclosure);
}
}
}
return(wasLoaded);
}
/// <summary>
/// Initializes the supplied <see cref="RssItem"/> using the specified <see cref="XPathNavigator"/> and <see cref="XmlNamespaceManager"/>.
/// </summary>
/// <param name="item">The <see cref="RssItem"/> to be filled.</param>
/// <param name="navigator">The <see cref="XPathNavigator"/> used to navigate the item XML data.</param>
/// <param name="manager">The <see cref="XmlNamespaceManager"/> used to resolve XML namespace prefixes.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> object used to configure the load operation.</param>
/// <exception cref="ArgumentNullException">The <paramref name="item"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="navigator"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="manager"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
private static void FillItem(RssItem item, XPathNavigator navigator, XmlNamespaceManager manager, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Validate parameters
//------------------------------------------------------------
Guard.ArgumentNotNull(item, "item");
Guard.ArgumentNotNull(navigator, "navigator");
Guard.ArgumentNotNull(manager, "manager");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Attempt to extract item information
//------------------------------------------------------------
XPathNavigator titleNavigator = navigator.SelectSingleNode("title", manager);
XPathNavigator linkNavigator = navigator.SelectSingleNode("link", manager);
XPathNavigator descriptionNavigator = navigator.SelectSingleNode("description", manager);
XPathNavigator sourceNavigator = navigator.SelectSingleNode("source", manager);
XPathNodeIterator enclosureIterator = navigator.Select("enclosure", manager);
XPathNodeIterator categoryIterator = navigator.Select("category", manager);
if (titleNavigator != null)
{
item.Title = titleNavigator.Value;
}
if (descriptionNavigator != null)
{
item.Description = descriptionNavigator.Value;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
item.Link = link;
}
}
if (sourceNavigator != null)
{
item.Source = new RssSource();
if (sourceNavigator.HasAttributes)
{
string urlAttribute = sourceNavigator.GetAttribute("url", String.Empty);
Uri url;
if (Uri.TryCreate(urlAttribute, UriKind.RelativeOrAbsolute, out url))
{
item.Source.Url = url;
}
}
if(!String.IsNullOrEmpty(sourceNavigator.Value))
{
item.Source.Title = sourceNavigator.Value;
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
Rss092SyndicationResourceAdapter.FillEnclosure(enclosure, enclosureIterator.Current, manager, settings);
item.Enclosures.Add(enclosure);
}
}
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
Rss092SyndicationResourceAdapter.FillCategory(category, categoryIterator.Current, manager, settings);
item.Categories.Add(category);
}
}
SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(navigator, settings);
adapter.Fill(item);
}
/// <summary>
/// Initializes the supplied <see cref="RssEnclosure"/> using the specified <see cref="XPathNavigator"/> and <see cref="XmlNamespaceManager"/>.
/// </summary>
/// <param name="enclosure">The <see cref="RssEnclosure"/> to be filled.</param>
/// <param name="navigator">The <see cref="XPathNavigator"/> used to navigate the enclosure XML data.</param>
/// <param name="manager">The <see cref="XmlNamespaceManager"/> used to resolve XML namespace prefixes.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> object used to configure the load operation.</param>
/// <exception cref="ArgumentNullException">The <paramref name="enclosure"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="navigator"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="manager"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
private static void FillEnclosure(RssEnclosure enclosure, XPathNavigator navigator, XmlNamespaceManager manager, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Validate parameters
//------------------------------------------------------------
Guard.ArgumentNotNull(enclosure, "enclosure");
Guard.ArgumentNotNull(navigator, "navigator");
Guard.ArgumentNotNull(manager, "manager");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Attempt to extract enclosure information
//------------------------------------------------------------
if (navigator.HasAttributes)
{
string urlAttribute = navigator.GetAttribute("url", String.Empty);
string lengthAttribute = navigator.GetAttribute("length", String.Empty);
string typeAttribute = navigator.GetAttribute("type", String.Empty);
Uri url;
if (Uri.TryCreate(urlAttribute, UriKind.RelativeOrAbsolute, out url))
{
enclosure.Url = url;
}
long length;
if (Int64.TryParse(lengthAttribute, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out length))
{
enclosure.Length = length;
}
if (!String.IsNullOrEmpty(typeAttribute))
{
enclosure.ContentType = typeAttribute;
}
}
SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(navigator, settings);
adapter.Fill(enclosure);
}
/// <summary>
/// Loads this <see cref="RssItem"/> using the supplied <see cref="XPathNavigator"/> and <see cref="SyndicationResourceLoadSettings"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> used to configure the load operation.</param>
/// <returns><b>true</b> if the <see cref="RssItem"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="RssItem"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
public bool Load(XPathNavigator source, SyndicationResourceLoadSettings settings)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
bool wasLoaded = false;
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(source, "source");
Guard.ArgumentNotNull(settings, "settings");
//------------------------------------------------------------
// Create namespace resolver
//------------------------------------------------------------
XmlNamespaceManager manager = new XmlNamespaceManager(source.NameTable);
//------------------------------------------------------------
// Attempt to extract syndication information
//------------------------------------------------------------
XPathNavigator authorNavigator = source.SelectSingleNode("author", manager);
XPathNavigator commentsNavigator = source.SelectSingleNode("comments", manager);
XPathNavigator descriptionNavigator = source.SelectSingleNode("description", manager);
XPathNavigator guidNavigator = source.SelectSingleNode("guid", manager);
XPathNavigator linkNavigator = source.SelectSingleNode("link", manager);
XPathNavigator publicationNavigator = source.SelectSingleNode("pubDate", manager);
XPathNavigator sourceNavigator = source.SelectSingleNode("source", manager);
XPathNavigator titleNavigator = source.SelectSingleNode("title", manager);
XPathNodeIterator categoryIterator = source.Select("category", manager);
XPathNodeIterator enclosureIterator = source.Select("enclosure", manager);
//------------------------------------------------------------
// Load required/common item elements
//------------------------------------------------------------
if (titleNavigator != null)
{
this.Title = titleNavigator.Value;
wasLoaded = true;
}
if (descriptionNavigator != null)
{
this.Description = descriptionNavigator.Value;
wasLoaded = true;
}
if (linkNavigator != null)
{
Uri link;
if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
{
this.Link = link;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load optional item elements
//------------------------------------------------------------
if (authorNavigator != null)
{
this.Author = authorNavigator.Value;
wasLoaded = true;
}
if (commentsNavigator != null)
{
Uri comments;
if (Uri.TryCreate(commentsNavigator.Value, UriKind.RelativeOrAbsolute, out comments))
{
this.Comments = comments;
wasLoaded = true;
}
}
if (guidNavigator != null)
{
RssGuid guid = new RssGuid();
if (guid.Load(guidNavigator, settings))
{
this.Guid = guid;
wasLoaded = true;
}
}
if (publicationNavigator != null)
{
DateTime publicationDate;
if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
{
this.PublicationDate = publicationDate;
wasLoaded = true;
}
}
if (sourceNavigator != null)
{
RssSource sourceFeed = new RssSource();
if (sourceFeed.Load(sourceNavigator, settings))
{
this.Source = sourceFeed;
wasLoaded = true;
}
}
//------------------------------------------------------------
// Load item collection elements
//------------------------------------------------------------
if (categoryIterator != null && categoryIterator.Count > 0)
{
while (categoryIterator.MoveNext())
{
RssCategory category = new RssCategory();
if (category.Load(categoryIterator.Current, settings))
{
this.Categories.Add(category);
}
}
}
if (enclosureIterator != null && enclosureIterator.Count > 0)
{
while (enclosureIterator.MoveNext())
{
RssEnclosure enclosure = new RssEnclosure();
if (enclosure.Load(enclosureIterator.Current, settings))
{
this.Enclosures.Add(enclosure);
}
}
}
//------------------------------------------------------------
// Attempt to extract syndication extension information
//------------------------------------------------------------
SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(source, settings);
adapter.Fill(this);
return wasLoaded;
}
