private static void ExtractTracks(ICleaner clean, HtmlNodeCollection songNodes, List <Track> tracklist)
{
for (int i = 0; i < songNodes.Count; i++)
{
HtmlNode artistNode = songNodes[i].SelectSingleNode(".//div[@class='artist']");
HtmlNode titleNode = songNodes[i].SelectSingleNode(".//div[@class='song']");
if (artistNode == null)
{
throw new NodeNotFoundException($"Couldn't find song's author node with the given XPath at index: {i}!");
}
if (titleNode == null)
{
throw new NodeNotFoundException($"Couldn't find song's title node with the given XPath at index: {i}!");
}
if (clean.IsNotArtist(artistNode.InnerText))
{
continue;
}
string artistName = clean.ArtistName(artistNode.InnerText);
tracklist.Add(new Track(artistName, titleNode.InnerText));
}
}
/// <summary>
/// Extract the <see cref="Track"/>s from the HTML.
/// </summary>
/// <param name="sourceCode">Non null string.</param>
/// <param name="clean">Non null custom cleaning object.</param>
/// <returns>Non null <see cref="Track"/> collection.</returns>
/// <exception cref="NodeNotFoundException"></exception>
public static List <Track> Process(string sourceCode, ICleaner clean)
{
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(sourceCode);
var songNodes = htmlDoc.DocumentNode.SelectNodes("//div[@class='content']/div[@class='chart-wrapper']/div[@class='chart-content-wrapper']/div[@class='chart-content-block-sub']");
if (songNodes == null)
{
throw new NodeNotFoundException("Couldn't find songs with the given XPath!");
}
var tracks = new List <Track>();
for (int i = 0; i < songNodes.Count; i++)
{
HtmlNode artistNode = songNodes[i].SelectSingleNode("./div[@class='chart-content-metadata-sub']/div[@class='chart-content-author-sub']/a"),
titleNode = songNodes[i].SelectSingleNode("./div[@class='chart-content-metadata-sub']/div[@class='chart-content-title-sub']/a");
if (artistNode == null)
{
throw new NodeNotFoundException($"Couldn't find song's author node with the given XPath at index: {i}!");
}
if (titleNode == null)
{
throw new NodeNotFoundException($"Couldn't find song's title node with the given XPath at index: {i}!");
}
string artistName = clean.ArtistName(artistNode.InnerText);
tracks.Add(new Track(artistName, titleNode.InnerText));
}
return(tracks);
}
