/// <summary>
/// Parse the results of the Bing search
/// </summary>
/// <param name="reader">The xml reader containing the search results</param>
public Collection<Article> ParseItems(XmlReader reader, Feed ownerFeed)
{
Collection<Article> results = new Collection<Article>();
reader.ReadToFollowing("item");
do
{
if (reader.ReadToFollowing("title"))
{
string name = reader.ReadElementContentAsString();
if (reader.ReadToFollowing("link"))
{
string uri = reader.ReadElementContentAsString();
// Assign feed information to Article object.
Article newResult = new Article
{
ArticleTitle = name,
ArticleBaseURI = uri
};
// Safely add the search result to the collection.
lock (_lockObject)
{
results.Add(newResult);
}
}
}
} while (reader.ReadToFollowing("item"));
return results;
}
//Delete an article.
public void DeleteArticle(Article deleteArticle)
{
db.Article.DeleteOnSubmit(deleteArticle);
SaveChangesToDB();
}
/// <summary>
/// Obtains the latest featured articles and sets them up to be displayed.
/// </summary>
public void GetFeatured()
{
// Gather the latest featured articles.
// If there are no new ones, then old ones will be used.
FeaturedAlgorithm.UpdateFeatured();
// Set the articles to be displayed.
// Gather each article from the database to ensure that it actually exists.
if (Settings.FeaturedArticles != null)
{
HubTileArticle1 = App.DataBaseUtility.QueryArticle(Convert.ToInt32(Settings.FeaturedArticles[0].ArticleID));
HubTileArticle2 = App.DataBaseUtility.QueryArticle(Convert.ToInt32(Settings.FeaturedArticles[1].ArticleID));
HubTileArticle3 = App.DataBaseUtility.QueryArticle(Convert.ToInt32(Settings.FeaturedArticles[2].ArticleID));
HubTileArticle4 = App.DataBaseUtility.QueryArticle(Convert.ToInt32(Settings.FeaturedArticles[3].ArticleID));
HubTileArticle5 = App.DataBaseUtility.QueryArticle(Convert.ToInt32(Settings.FeaturedArticles[4].ArticleID));
HubTileArticle6 = App.DataBaseUtility.QueryArticle(Convert.ToInt32(Settings.FeaturedArticles[5].ArticleID));
}
}
/// <summary>
/// Function to parse the item of a feed and obtain useful data.
/// </summary>
/// <param name="feed">The Feed the article being parsed belongs to.</param>
/// <param name="synFeed">Syndication Feed to be parsed</param>
/// <param name="item">SyndicationItem that will be added to the database</param>
public Collection<Article> ParseItems(XmlReader reader, Feed parentFeed)
{
// Collection to store all parsed articles
Collection<Article> parsedArticles = new Collection<Article>();
SyndicationFeed synFeed;
// Create a syndicationFeed from the provided reader
try
{
synFeed = SyndicationFeed.Load(reader);
}
catch
{
return null;
}
if (null != synFeed)
{
// First, obtain an image for the feed if it does not have one.
if (!ImageGrabber.IfImageExists(parentFeed))
{
ImageGrabber.GetImage(parentFeed, synFeed);
latestDate = new DateTime();
}
// Parse the xml file, getting each article.
foreach (SyndicationItem item in synFeed.Items)
{
// Get the necessary details from the SyndicationItem.
string title = (item.Title != null) ? item.Title.Text : String.Empty;
title = HTMLParser(title); // parse the title for html leftovers
string itemURI = (item.Links[0].Uri.ToString() != null) ? item.Links[0].Uri.ToString() : String.Empty;
DateTimeOffset date = item.PublishDate;
// Special case for the text/preview of article.
StringBuilder text = new StringBuilder();
if (item.Summary != null)
{
text.Append(item.Summary.Text);
}
// If the article instead writes to the content:encoded portion of the xml.
else
{
foreach (SyndicationElementExtension extension in item.ElementExtensions)
{
XElement ele = extension.GetObject<XElement>();
if (ele.Name.LocalName == "encoded"
&& ele.Name.Namespace.ToString().Contains("content"))
{
text.Append(ele.Value + "<br/>");
}
}
}
string parsedText = HTMLParser(text.ToString());
if (parsedText.Length >= 3500)
{
parsedText = parsedText.Substring(0, 2499);
}
if (null == latestDate)
{
lock (_lockObject)
{
latestDate = new DateTime();
}
}
bool val;
lock (_lockObject)
{
val = latestDate.CompareTo(date.DateTime) < 0;
}
if (val)
{
// Initialize new article, then add it to the database.
Article newArticle = new Article
{
ArticleTitle = title,
Authors = parentFeed.FeedTitle,
PublishDate = date.DateTime.ToLocalTime(),
Summary = parsedText,
LastUpdatedTime = DateTime.Now,
ArticleBaseURI = itemURI,
FeedID = parentFeed.FeedID,
ImageURL = parentFeed.ImageURL
};
parsedArticles.Add(newArticle);
}
}
}
return parsedArticles;
}
partial void DeleteArticle(Article instance);
partial void UpdateArticle(Article instance);
partial void InsertArticle(Article instance);
/// <summary>
/// Parse the results of the Bing search
/// </summary>
/// <param name="reader">The xml reader containing the search results</param>
private void ParseResults(XmlReader reader)
{
reader.ReadToFollowing("item");
do
{
if (reader.ReadToFollowing("title"))
{
string name = reader.ReadElementContentAsString();
if (reader.ReadToFollowing("link"))
{
string uri = reader.ReadElementContentAsString();
Article newResult = new Article
{
ArticleTitle = name,
ArticleBaseURI = uri
};
// Safely add the search result to the collection.
lock (_lockObject)
{
results.Add(newResult);
}
}
}
} while (reader.ReadToFollowing("item"));
}
