private void OnNowPlayingChanged(NowPlayingInfo newInfo)
{
if (_lastNowPlayingInfo != newInfo &&
_lastNowPlayingInfo?.IsEquivalentTo(newInfo) != true)
{
NowPlayingChanged?.Invoke(this, new NowPlayingChangedEventArgs(_lastNowPlayingInfo, newInfo));
_lastNowPlayingInfo = newInfo;
}
}
private async void TimerCallback(object sender, ElapsedEventArgs args)
{
var timeoutCancellationTokenSource = new CancellationTokenSource(_configuration.PollingInterval * 5);
CancellationTokenSource cancellationTokenSource;
if (_cancellationTokenSource != null)
{
cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(
_cancellationTokenSource.Token,
timeoutCancellationTokenSource.Token);
}
else
{
cancellationTokenSource = timeoutCancellationTokenSource;
}
NowPlayingInfo nowPlayingInfo = null;
try
{
var web = new HtmlWeb();
var doc = await web.LoadFromWebAsync(
_configuration.SourceUrl,
Encoding.UTF8,
cancellationTokenSource.Token);
var infoDiv = doc.DocumentNode.FirstDescendantWithClass("div", "card horizontal");
if (infoDiv != null)
{
var imgUrl = infoDiv.Descendants("img").FirstOrDefault()?.GetAttributeValue("src", default(string));
var content = infoDiv.FirstDescendantWithClass("div", "card-content")?.InnerText;
if (content != null)
{
var lines = content
.Split(new[] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries)
.Select(x => x.Trim())
.Take(2)
.ToList();
var song = lines[0];
var artist = lines[1];
nowPlayingInfo = new NowPlayingInfo(artist, song, imgUrl);
}
}
}
catch (TaskCanceledException)
{
// Ignore - these are expected during timeouts or while quitting
}
catch (Exception ex)
{
_logger?.Log(ex);
}
finally
{
timeoutCancellationTokenSource.Dispose();
cancellationTokenSource.Dispose();
}
OnNowPlayingChanged(nowPlayingInfo);
}
