/// <summary>
/// Finds the domain that best matches the current uri, into an enumeration of domains.
/// </summary>
/// <param name="domains">The enumeration of Umbraco domains.</param>
/// <param name="current">The uri of the current request, or null.</param>
/// <param name="defaultToFirst">A value indicating whether to return the first domain of the list when no domain matches.</param>
/// <returns>The domain and its normalized uri, that best matches the current uri, else the first domain (if <c>defaultToFirst</c> is <c>true</c>), else null.</returns>
public static DomainAndUri DomainMatch(IEnumerable <Domain> domains, Uri current, bool defaultToFirst)
{
// sanitize the list to have proper uris for comparison (scheme, path end with /)
// we need to end with / because example.com/foo cannot match example.com/foobar
// we need to order so example.com/foo matches before example.com/
var scheme = current == null ? Uri.UriSchemeHttp : current.Scheme;
var domainsAndUris = domains
.Where(d => !IsWildcardDomain(d))
.Select(d => SanitizeForBackwardCompatibility(d))
.Select(d => new { Domain = d, UriString = UriUtility.EndPathWithSlash(UriUtility.StartWithScheme(d.Name, scheme)) })
.OrderByDescending(t => t.UriString)
.Select(t => new DomainAndUri {
Domain = t.Domain, Uri = new Uri(t.UriString)
});
if (!domainsAndUris.Any())
{
return(null);
}
DomainAndUri domainAndUri;
if (current == null)
{
// take the first one by default
domainAndUri = domainsAndUris.First();
}
else
{
// look for a domain that would be the base of the hint
// else take the first one by default
var hintWithSlash = current.EndPathWithSlash();
domainAndUri = domainsAndUris
.FirstOrDefault(t => t.Uri.IsBaseOf(hintWithSlash));
if (domainAndUri == null && defaultToFirst)
{
domainAndUri = domainsAndUris.First();
}
}
if (domainAndUri != null)
{
domainAndUri.Uri = domainAndUri.Uri.TrimPathEndSlash();
}
return(domainAndUri);
}
