public async Task <List <RssSourceDto> > Handle(GetRssSourceByIdQuery request, CancellationToken cancellationToken)
{
var rssSources = await _context.RssSources.Where(s => !request.Id.HasValue || s.Id.Equals(request.Id))
.Select(s => _mapper.Map <RssSourceDto>(s))
.ToListAsync(cancellationToken);
return(rssSources);
}
public async Task Aggregate()
{
var query = new GetRssSourceByIdQuery(null);
var rssSources = await _mediator.Send(query);
var newsList = new ConcurrentBag <NewsDto>();
var currentNewsUrls = await _mediator.Send(new GetOwnNewsUrlQuery());
Parallel.ForEach(rssSources, (rssSource) =>
{
using (var reader = XmlReader.Create(rssSource.Url))
{
var feed = SyndicationFeed.Load(reader);
reader.Close();
var feedUrls = feed.Items.Select(i => i.Id).ToList();
Log.Information($"News count in DB: {currentNewsUrls.Count}");
foreach (var feedItem in feed.Items)
{
if (!currentNewsUrls.Any(url => url.Equals(feedItem.Id)))
{
var newsDto = new NewsDto()
{
Id = Guid.NewGuid(),
RssSourceId = rssSource.Id,
Url = feedItem.Id,
Title = feedItem.Title.Text,
Summary = SyndicationHelper.GetSyndicationItemSummary(feedItem),
NewsDate = feedItem.PublishDate.UtcDateTime,
DateCollect = DateTime.UtcNow
};
newsList.Add(newsDto);
}
}
}
});
//return newsList;
}
public async Task <IEnumerable <RssSourceDto> > GetRssSources(Guid?id = null)
{
var getRssSourceByIdQuery = new GetRssSourceByIdQuery(id);
return(await _mediator.Send(getRssSourceByIdQuery));
}
