public void ToString_TemplateRoundtrips(string template)
{
var routePattern = RoutePatternFactory.Parse(template);
var sb = new StringBuilder();
RoutePatternWriter.WriteString(sb, routePattern.PathSegments);
Assert.Equal(template, sb.ToString());
}
// CreateEndpoints processes the route pattern, replacing area/controller/action parameters with endpoint values
// Because of default values it is possible for a route pattern to resolve to multiple endpoints
private int CreateEndpoints(
List <Endpoint> endpoints,
ref StringBuilder patternStringBuilder,
ActionDescriptor action,
int routeOrder,
RoutePattern routePattern,
IReadOnlyDictionary <string, object> allDefaults,
IReadOnlyDictionary <string, object> nonInlineDefaults,
string name,
RouteValueDictionary dataTokens,
IDictionary <string, IList <IParameterPolicy> > allParameterPolicies,
bool suppressLinkGeneration,
bool suppressPathMatching,
List <Action <EndpointModel> > conventions)
{
var newPathSegments = routePattern.PathSegments.ToList();
var hasLinkGenerationEndpoint = false;
// Create a mutable copy
var nonInlineDefaultsCopy = nonInlineDefaults != null
? new RouteValueDictionary(nonInlineDefaults)
: null;
var resolvedRouteValues = ResolveActionRouteValues(action, allDefaults);
for (var i = 0; i < newPathSegments.Count; i++)
{
// Check if the pattern can be shortened because the remaining parameters are optional
//
// e.g. Matching pattern {controller=Home}/{action=Index} against HomeController.Index
// can resolve to the following endpoints: (sorted by RouteEndpoint.Order)
// - /
// - /Home
// - /Home/Index
if (UseDefaultValuePlusRemainingSegmentsOptional(
i,
action,
resolvedRouteValues,
allDefaults,
ref nonInlineDefaultsCopy,
newPathSegments))
{
// The route pattern has matching default values AND an optional parameter
// For link generation we need to include an endpoint with parameters and default values
// so the link is correctly shortened
// e.g. {controller=Home}/{action=Index}/{id=17}
if (!hasLinkGenerationEndpoint)
{
var ep = CreateEndpoint(
action,
resolvedRouteValues,
name,
GetPattern(ref patternStringBuilder, newPathSegments),
newPathSegments,
nonInlineDefaultsCopy,
routeOrder++,
dataTokens,
suppressLinkGeneration,
true,
conventions);
endpoints.Add(ep);
hasLinkGenerationEndpoint = true;
}
var subPathSegments = newPathSegments.Take(i);
var subEndpoint = CreateEndpoint(
action,
resolvedRouteValues,
name,
GetPattern(ref patternStringBuilder, subPathSegments),
subPathSegments,
nonInlineDefaultsCopy,
routeOrder++,
dataTokens,
suppressLinkGeneration,
suppressPathMatching,
conventions);
endpoints.Add(subEndpoint);
}
UpdatePathSegments(i, action, resolvedRouteValues, routePattern, newPathSegments, ref allParameterPolicies);
}
var finalEndpoint = CreateEndpoint(
action,
resolvedRouteValues,
name,
GetPattern(ref patternStringBuilder, newPathSegments),
newPathSegments,
nonInlineDefaultsCopy,
routeOrder++,
dataTokens,
suppressLinkGeneration,
suppressPathMatching,
conventions);
endpoints.Add(finalEndpoint);
return(routeOrder);
string GetPattern(ref StringBuilder sb, IEnumerable <RoutePatternPathSegment> segments)
{
if (sb == null)
{
sb = new StringBuilder();
}
RoutePatternWriter.WriteString(sb, segments);
var rawPattern = sb.ToString();
sb.Length = 0;
return(rawPattern);
}
}