private Channel Extract(ChannelPageExtractor channelPage)
{
var channelId =
channelPage.TryGetChannelId() ??
throw new YoutubeExplodeException("Could not extract channel ID.");
var title =
channelPage.TryGetChannelTitle() ??
throw new YoutubeExplodeException("Could not extract channel title.");
var logoUrl =
channelPage.TryGetChannelLogoUrl() ??
throw new YoutubeExplodeException("Could not extract channel logo URL.");
var logoSize = Regex
.Matches(logoUrl, @"\bs(\d+)\b")
.Cast <Match>()
.LastOrDefault()?
.Groups[1]
.Value
.NullIfWhiteSpace()?
.ParseIntOrNull() ?? 100;
var thumbnails = new[] { new Thumbnail(logoUrl, new Resolution(logoSize, logoSize)) };
return(new Channel(channelId, title, thumbnails));
}
private async ValueTask <ChannelPageExtractor> GetChannelPageAsync(
string channelRoute,
CancellationToken cancellationToken = default)
{
var url = $"https://www.youtube.com/{channelRoute}?hl=en";
for (var retry = 0; retry <= 5; retry++)
{
var raw = await SendHttpRequestAsync(url, cancellationToken);
var channelPage = ChannelPageExtractor.TryCreate(raw);
if (channelPage is not null)
{
return(channelPage);
}
}
throw new YoutubeExplodeException(
"Channel page is broken. " +
"Please try again in a few minutes."
);
}
