private static DateTimeOffset GetDate(CodeHollow.FeedReader.FeedItem item)
{
if (item.SpecificItem is AtomFeedItem feedItem)
{
if (!string.IsNullOrWhiteSpace(feedItem.UpdatedDateString))
{
return(ParseDate(feedItem.UpdatedDateString));
}
}
if (!string.IsNullOrEmpty(item.PublishingDateString))
{
return(ParseDate(item.PublishingDateString));
}
if (item.SpecificItem is Rss20FeedItem rss20FeedItem)
{
if (!string.IsNullOrWhiteSpace(rss20FeedItem.DC.DateString))
{
return(ParseDate(rss20FeedItem.DC.DateString));
}
}
if (TryExtractDateFromUrl(item.Link, out var date))
{
return(date);
}
return(default);
private string GetImageUrl(CodeHollow.FeedReader.FeedItem item)
{
if (item.SpecificItem is MediaRssFeedItem feedItem)
{
if (feedItem.Enclosure.MediaType?.StartsWith("image") == true)
{
return(feedItem.Enclosure.Url);
}
return(feedItem.Media.FirstOrDefault()?.Url);
}
if (item.SpecificItem is AtomFeedItem atomFeedItem)
{
return(atomFeedItem.Links.FirstOrDefault(x => x.LinkType?.StartsWith("image") == true)?.Href);
}
if (item.SpecificItem is Rss20FeedItem rss20FeedItem)
{
if (rss20FeedItem.Enclosure.MediaType?.StartsWith("image") == true)
{
return(rss20FeedItem.Enclosure.Url);
}
if (rss20FeedItem.Description?.Contains("<img") == true)
{
return(rss20FeedItem.Description
.Pipe(_htmlParser.ExtractFirstImageUrl)
.Pipe(WebUtility.HtmlDecode));
}
}
return(null);
}
private static string GetSummary(CodeHollow.FeedReader.FeedItem syndicationItem)
{
if (!string.IsNullOrEmpty(syndicationItem.Description))
{
return(syndicationItem.Description);
}
return(null);
}
private FeedItem ConvertToRssItem(CodeHollow.FeedReader.FeedItem syndicationItem)
{
return(new FeedItem {
Id = syndicationItem.Id,
Title = WebUtility.HtmlDecode(syndicationItem.Title),
Link = syndicationItem.Link,
PublishDate = GetDate(syndicationItem),
ImageUrl = syndicationItem
.Pipe(GetImageUrl)
.Pipe(UrlSanitizer.Sanitize),
Summary = syndicationItem
.Pipe(GetSummary)
.Pipe(WebUtility.HtmlDecode)
.Pipe(HtmlToPlainText)
.Pipe(ClearConsecutiveSpaces)
});
}
