static void WhatIfExamples()
{
// Get the first What If article
WhatIfArticle first = WhatIf.GetFirstArticle();
// Get the latest What If article
WhatIfArticle latest = WhatIf.GetLatestArticle();
// Get a random What If article
WhatIfArticle random = WhatIf.GetRandomArticle();
// Get a specific What If article by ID
WhatIfArticle fortyTwo = WhatIf.GetArticle(42);
// Get the next article
WhatIfArticle fortyThree = fortyTwo.Next();
// Get the previous article
WhatIfArticle fortyOne = fortyTwo.Previous();
// There's nothing before the first article
WhatIfArticle badFirst = first.Previous();
// ...and nothing after the latest
WhatIfArticle badLast = latest.Next();
// Get the dictionary of What If article entries, keyed on article ID
Dictionary <int, WhatIfArchiveEntry> dict = WhatIf.WhatIfDictionary;
// Refresh the article dictionary
WhatIf.RefreshWhatIfDictionary();
}
/// <summary>
/// Get a What If article by ID
/// </summary>
/// <param name="id">Article ID</param>
/// <returns>What If article if found, null otherwise</returns>
public static WhatIfArticle GetArticle(int id)
{
WhatIfArticle article = XkcdDatabase.GetWhatIfArticle(id);
if (article != null)
{
return(article);
}
if (WhatIfDictionary.Keys.Contains(id))
{
return(GetArticle(WhatIfDictionary[id]));
}
return(null);
}
/// <summary>
/// Inserts or updates a What If article in the database
/// </summary>
/// <param name="comic">Article to insert or update</param>
internal static void InsertOrUpdateWhatIfArticle(WhatIfArticle article)
{
using (var db = new LiteDatabase(DatabaseLocation))
{
ILiteCollection <WhatIfArticle> collection = db.GetCollection <WhatIfArticle>(WhatIfCollectionName);
if (collection.FindById(article.Id) != null)
{
collection.Update(article);
}
else
{
collection.Insert(article);
}
collection.EnsureIndex(x => x.Id);
}
}
/// <summary>
/// Gets a What If Article from an archive entry
/// </summary>
/// <param name="archiveEntry">Archive entry</param>
/// <returns>Whar If Article</returns>
public static WhatIfArticle GetArticle(WhatIfArchiveEntry archiveEntry)
{
WhatIfArticle article = XkcdDatabase.GetWhatIfArticle(archiveEntry.Id);
if (article != null)
{
return(article);
}
var web = new HtmlWeb();
HtmlDocument doc = web.Load(archiveEntry.PermaLink);
HtmlNode articleContentNode = doc.DocumentNode.Descendants().FirstOrDefault(x => x.Name == "article" && x.HasClass("entry"));
article = new WhatIfArticle
{
Id = archiveEntry.Id,
PermaLink = archiveEntry.PermaLink,
Title = archiveEntry.Title,
Date = archiveEntry.Date,
Html = articleContentNode.OuterHtml
};
XkcdDatabase.InsertOrUpdateWhatIfArticle(article);
return(article);
}