private async Task UpdateLinksForSite(string url, IEnumerable <WebSiteInfo> links)
{
var currentDomain = ExtractDomain(url);
var currentSite = await _context.WebSites.Include(site => site.LinkedSites).FirstOrDefaultAsync(w => w.Url == url);
if (currentSite == null)
{
var existingLinks = _context.WebSites.ToList().Except(links, new SiteComparer());
var siteExistingLinks = existingLinks.Intersect(links);
var siteNotExistingLnks = links.Except(siteExistingLinks);
var newLinks = siteExistingLinks.Union(siteNotExistingLnks);
var isInteresting = IsInteresting(newLinks);
currentSite = new WebSiteInfo
{
Url = url,
Domain = currentDomain,
LinkedSites = newLinks.ToList(),
IsInteresting = isInteresting
};
_context.Add(currentSite);
await _context.SaveChangesAsync();
}
else if (currentSite.LinkedSites == null || currentSite.LinkedSites.Count == 0)
{
var existingLinks = _context.WebSites.ToList().Except(links, new SiteComparer());
var siteExistingLinks = existingLinks.Intersect(links);
var siteNotExistingLnks = links.Except(siteExistingLinks);
var newLinks = siteExistingLinks.Union(siteNotExistingLnks).ToList();
var isInteresting = IsInteresting(newLinks);
currentSite.LinkedSites = newLinks;
currentSite.IsInteresting = isInteresting;
await _context.SaveChangesAsync();
}
}