static IEnumerable GetItems(object node)
{
IEnumerable results = null;
switch (node)
{
case IShellController shell:
results = shell.GetItems();
break;
case IShellItemController item:
results = item.GetItems();
break;
case IShellSectionController section:
results = section.GetItems();
break;
case ShellContent content:
results = Array.Empty <object>();
break;
case GlobalRouteItem routeItem:
results = routeItem.Items;
break;
}
if (results == null)
{
throw new ArgumentException($"{node}", nameof(node));
}
foreach (var result in results)
{
yield return(result);
}
if (node is GlobalRouteItem)
{
yield break;
}
var keys = Routing.GetRouteKeys();
string route = GetRoute(node);
foreach (var key in keys)
{
if (key.StartsWith(_pathSeparator, StringComparison.Ordinal) && !(node is Shell))
{
continue;
}
var segments = RetrievePaths(key);
if (segments[0] == route)
{
yield return(new GlobalRouteItem(key, key));
}
}
}
internal static List <RouteRequestBuilder> GenerateRoutePaths(Shell shell, Uri request, Uri originalRequest, bool enableRelativeShellRoutes)
{
var routeKeys = Routing.GetRouteKeys();
for (int i = 0; i < routeKeys.Length; i++)
{
routeKeys[i] = FormatUri(routeKeys[i]);
}
request = FormatUri(request, shell);
originalRequest = FormatUri(originalRequest, shell);
List <RouteRequestBuilder> possibleRoutePaths = new List <RouteRequestBuilder>();
if (!request.IsAbsoluteUri)
{
request = ConvertToStandardFormat(shell, request);
}
string localPath = request.LocalPath;
bool relativeMatch = false;
if (!originalRequest.IsAbsoluteUri &&
!originalRequest.OriginalString.StartsWith("//", StringComparison.Ordinal))
{
relativeMatch = true;
}
var segments = RetrievePaths(localPath);
var depthStart = 0;
if (segments[0] == shell?.Route)
{
segments = segments.Skip(1).ToArray();
depthStart = 1;
}
else
{
depthStart = 0;
}
if (relativeMatch && shell?.CurrentItem != null)
{
var result = ProcessRelativeRoute(shell, routeKeys, segments, enableRelativeShellRoutes, originalRequest);
if (result.Count > 0)
{
return(result);
}
}
possibleRoutePaths.Clear();
SearchPath(shell, null, segments, possibleRoutePaths, depthStart);
var bestMatches = GetBestMatches(possibleRoutePaths);
if (bestMatches.Count > 0)
{
return(bestMatches);
}
bestMatches.Clear();
ExpandOutGlobalRoutes(possibleRoutePaths, routeKeys);
foreach (var possibleRoutePath in possibleRoutePaths)
{
if (possibleRoutePath.IsFullMatch)
{
continue;
}
var url = possibleRoutePath.PathFull;
var globalRouteMatches =
SearchForGlobalRoutes(
possibleRoutePath.RemainingSegments,
new ShellNavigationState(url, false).FullLocation,
possibleRoutePath.GetNodeLocation(),
routeKeys);
if (globalRouteMatches.Count != 1)
{
continue;
}
var globalRouteMatch = globalRouteMatches[0];
while (possibleRoutePath.NextSegment != null)
{
var matchIndex = globalRouteMatch.SegmentsMatched.IndexOf(possibleRoutePath.NextSegment);
if (matchIndex < 0)
{
break;
}
possibleRoutePath.AddGlobalRoute(
globalRouteMatch.GlobalRouteMatches[matchIndex],
globalRouteMatch.SegmentsMatched[matchIndex]);
}
}
possibleRoutePaths = GetBestMatches(possibleRoutePaths);
if (possibleRoutePaths.Count == 0)
{
foreach (var routeKey in routeKeys)
{
if (routeKey == originalRequest.OriginalString)
{
var builder = new RouteRequestBuilder(routeKey, routeKey, null, new string[] { routeKey });
return(new List <RouteRequestBuilder> {
builder
});
}
}
if (!relativeMatch)
{
for (int i = 0; i < routeKeys.Length; i++)
{
var route = routeKeys[i];
var uri = ConvertToStandardFormat(shell, CreateUri(route));
if (uri.Equals(request))
{
throw new Exception($"Global routes currently cannot be the only page on the stack, so absolute routing to global routes is not supported. For now, just navigate to: {originalRequest.OriginalString.Replace("//", "")}");
}
}
}
}
return(possibleRoutePaths);
}