private static RouteValidationResult EnsureCatchAllOnlyAppearAtEnd(Segment[] segments, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var catchAll = segments.OfType<CatchAllParameterSegment>().ToList();
return catchAll.Count == 1 && segments.Last() != catchAll.Single()
? RouteValidationResult.Failure(string.Format("Catch-all parameters may only appear at the end of a route. Catch all parameter: '{0}'", catchAll.Single().ParameterName))
: RouteValidationResult.Successful();
}
private static RouteValidationResult EnsureNoMoreThanOneCatchAllSegment(Segment[] segments, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var catchAll = segments.OfType<CatchAllParameterSegment>().ToList();
return catchAll.Count > 1
? RouteValidationResult.Failure(string.Format("A route cannot have more than one catch-all parameter. Catch all parameters: {0}", string.Join(", ", catchAll.Select(x => "'" + x.ParameterName + "'").ToArray())))
: RouteValidationResult.Successful();
}
private RouteValidationResult EnsureNoUnrecognizableSegments(Segment[] segments, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var unrecognized = segments.Where(x => SupportedSegmentTypes.Contains(x.GetType()) == false).ToList();
return unrecognized.Count > 0
? RouteValidationResult.Failure(string.Format("Unrecognized segment types were found. If using a custom segment type, please replace the IRouteValidator to enforce your own route validation rules. Unrecognized types: {0}", string.Join(", ", unrecognized.Select(x => "'" + x.GetType().Name + "'").ToArray())))
: RouteValidationResult.Successful();
}
private static RouteValidationResult MustHaveViewModelSegment(Segment[] segments, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var hasViewModel = segments.OfType<ParameterSegment>().Any(x => x.ParameterName == "viewModel")
|| defaults.GetOrDefault<object>("viewModel") != null;
return hasViewModel
? RouteValidationResult.Successful()
: RouteValidationResult.Failure("The route does not contain a '{viewModel}' segment, and no default ViewModel type was provided.");
}
private static RouteValidationResult MustHaveActionSegment(Segment[] segments, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var hasController = segments.OfType<ParameterSegment>().Any(x => x.ParameterName == "action")
|| defaults.GetOrDefault<object>("action") != null;
return hasController
? RouteValidationResult.Successful()
: RouteValidationResult.Failure("The route does not contain an '{action}' segment, and no default action was provided.");
}
/// <summary>
/// Parses the given route specification, producing a <see cref="ParsedRoute"/>.
/// </summary>
/// <param name="route">The route.</param>
/// <param name="routeSpecification">The route specification.</param>
/// <param name="defaults">The defaults.</param>
/// <param name="constraints">The constraints.</param>
/// <returns></returns>
public ParsedRoute Parse(IRoute route, string routeSpecification, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var parts = routeSpecification.SplitUrlPath();
var segments = new Segment[parts.Length];
for (var i = 0; i < parts.Length; i++)
{
var segment = recognisers.Select(x => x.Recognise(parts[i], defaults, constraints)).FirstOrDefault(x => x != null);
if (segment == null)
{
throw new InvalidRouteException(
route,
string.Format("Invalid route: {0}. The route segment '{1}' was not recognized as a valid segment.", route, parts[i])
);
}
segments[i] = segment;
}
return new ParsedRoute(defaults, constraints, segments);
}
private static RouteValidationResult EnsureParameterNamesAreUnique(Segment[] segments, RouteValueDictionary defaults, RouteValueDictionary constraints)
{
var parameterSegments = segments.OfType<ParameterSegment>().Select(x => x.ParameterName);
var catchAllSegments = segments.OfType<CatchAllParameterSegment>().Select(x => x.ParameterName);
var parameterNames = parameterSegments.Concat(catchAllSegments).Select(x => x.ToLowerInvariant());
var duplicateNames = parameterNames.GroupBy(x => x).Where(g => g.Count() > 1).Select(x => x.Key).ToList();
return duplicateNames.Count > 0
? RouteValidationResult.Failure(string.Format("The same parameter name cannot be used twice within a route. The following parameters appeared more than once: {0}", string.Join(", ", duplicateNames.Select(x => "'" + x + "'").ToArray())))
: RouteValidationResult.Successful();
}