/// <summary>
/// Gets a comic from a comic archive entry
/// </summary>
/// <param name="comicArchiveEntry">Comic archive entry</param>
/// <returns>Comic object</returns>
public static Comic GetComic(ComicArchiveEntry comicArchiveEntry)
{
Comic comic = XkcdDatabase.GetComic(comicArchiveEntry.Id);
if (comic != null)
{
return(comic);
}
var permaLink = $"https://xkcd.com/{comicArchiveEntry.Id}/";
var web = new HtmlWeb();
HtmlDocument doc = web.Load(permaLink);
return(GetComic(comicArchiveEntry, permaLink, doc));
}
/// <summary>
/// Gets a comic from a comic archive entry, comic url, and html document
/// </summary>
/// <param name="comicArchiveEntry">Comic archive entry</param>
/// <param name="url">Comic permalink</param>
/// <param name="doc">Comic webpage html document</param>
/// <returns>Comic object</returns>
private static Comic GetComic(ComicArchiveEntry comicArchiveEntry, string url, HtmlDocument doc)
{
string imageUrl = string.Empty;
string altText = string.Empty;
switch (comicArchiveEntry.Id)
{
case 1350:
imageUrl = "https://imgs.xkcd.com/comics/shouldnt_be_hard.png";
altText = "Every choice, no matter how small, begins a new story.";
break;
case 1416:
imageUrl = "https://imgs.xkcd.com/comics/pixels.png";
altText = "It's turtles all the way down.";
break;
case 1506:
imageUrl = "https://imgs.xkcd.com/comics/xkcloud.png";
altText = string.Empty; // No alt text for this comic
break;
case 1525:
imageUrl = "https://imgs.xkcd.com/comics/emojic_8_ball.png";
altText = string.Empty; // No alt text for this comic
break;
case 1608:
// This comic is interactive, and difficult.
// TODO: I should find a better way to display this one
imageUrl = string.Empty;
altText = string.Empty;
break;
case 1663:
imageUrl = string.Empty; // Interactive with no static image
altText = "Relax";
break;
case 2067:
imageUrl = "https://imgs.xkcd.com/comics/challengers.png";
altText = "Use your mouse or fingers to pan + zoom. To edit the map, submit your ballot on November 6th.";
break;
case 2198:
imageUrl = "https://imgs.xkcd.com/comics/throw.png";
altText = "The keys to successfully throwing a party are location, planning, and one of those aircraft carrier steam catapults.";
break;
default:
HtmlNode comicNode = doc.DocumentNode.Descendants().Where(y => y.Id == "comic").FirstOrDefault();
HtmlNode comicImageNode = comicNode.Descendants().Where(x => x.Name == "img").FirstOrDefault();
if (comicImageNode != null)
{
if (comicImageNode.Attributes["src"] != null)
{
imageUrl = $"https:{comicImageNode.Attributes["src"].DeEntitizeValue}";
}
if (comicImageNode.Attributes["title"] != null)
{
altText = comicImageNode.Attributes["title"].DeEntitizeValue;
}
}
break;
}
var comic = new Comic
{
Id = comicArchiveEntry.Id,
ImageUrl = imageUrl,
AltText = altText,
Title = comicArchiveEntry.Title,
PermaLink = url,
Date = comicArchiveEntry.Date
};
XkcdDatabase.InsertOrUpdateComic(comic);
return(comic);
}
/// <summary>
/// Gets the first comic (ID=1)
/// </summary>
/// <returns>The first comic</returns>
public static Comic GetFirstComic()
{
ComicArchiveEntry first = ComicDictionary.OrderBy(x => x.Key).FirstOrDefault().Value;
return(GetComic(first));
}
/// <summary>
/// Gets the latest comic
/// </summary>
/// <returns>The latest comic</returns>
public static Comic GetLatestComic()
{
ComicArchiveEntry latest = ComicDictionary.OrderByDescending(x => x.Key).FirstOrDefault().Value;
return(GetComic(latest));
}
