public async Task <ComicStripResponse> GetLastComicStripUrlAsync(ComicStripType comicStripType)
{
var dateTime = DateTime.UtcNow;
var comicStripResponse = await GetComicStripUrlAsync(dateTime, comicStripType);
if (comicStripResponse.HasErrors)
{
comicStripResponse = await GetComicStripUrlAsync(dateTime.AddDays(-1), comicStripType);
}
return(comicStripResponse);
}
private ComicStripResponse GetImageUri(HtmlDocument htmlDocument, ComicStripType comicStripType)
{
HtmlNodeCollection imagesNodeCollection = htmlDocument.DocumentNode.SelectNodes(comicStripType.HtmlImageClass);
if (imagesNodeCollection is null ||
imagesNodeCollection.Count != 1)
{
return(new ComicStripResponse(String.Empty, true, "Resource not found"));
}
var imageLink = String.Empty;
if (comicStripType.IsInChildNodes)
{
imageLink = imagesNodeCollection[0].ChildNodes[0].GetAttributeValue("src", "");
}
else
{
imageLink = imagesNodeCollection[0].GetAttributeValue("src", "");
}
return(new ComicStripResponse($"{imageLink}.png"));
}
public async Task <ComicStripResponse> GetComicStripUrlAsync(DateTime dateTime, ComicStripType comicStripType)
{
var dilbertStripResponse = await GetHtmlSourceCodeAsync(new Uri(String.Format(comicStripType.Url, dateTime.ToString(comicStripType.Parameter))));
if (!dilbertStripResponse.HasErrors)
{
var htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(dilbertStripResponse.Source);
return(GetImageUri(htmlDocument, comicStripType));
}
return(dilbertStripResponse);
}
