Added support for localizable routes

.github/setup/action.yml

@@ -37,7 +37,6 @@ runs:
       dotnet-version: |
         8.0.x
         6.0.x
-        3.1.x
   - if: ${{ runner.os == 'Windows' }}
     uses: microsoft/[email protected]
 

src/Framework/Framework/Controls/RouteLink.cs

@@ -8,6 +8,7 @@
 using DotVVM.Framework.Compilation.Validation;
 using DotVVM.Framework.Configuration;
 using DotVVM.Framework.Hosting;
+using DotVVM.Framework.Routing;
 using DotVVM.Framework.Runtime;
 using DotVVM.Framework.Utils;
 
@@ -64,6 +65,18 @@ public string Text
         public static readonly DotvvmProperty TextProperty =
             DotvvmProperty.Register<string, RouteLink>(c => c.Text, "");
 
+        /// <summary>
+        /// Gets or sets the required culture of the page. This property is supported only when using localizable routes.
+        /// </summary>
+        [MarkupOptions(AllowBinding = false)]
+        public string? Culture
+        {
+            get { return (string?)GetValue(CultureProperty); }
+            set { SetValue(CultureProperty, value); }
+        }
+        public static readonly DotvvmProperty CultureProperty
+            = DotvvmProperty.Register<string?, RouteLink>(c => c.Culture, null);
+
         /// <summary>
         /// Gets or sets a collection of parameters to be substituted in the route URL. If the current route contains a parameter with the same name, its value will be reused unless another value is specified here.
         /// </summary>
@@ -185,15 +198,28 @@ public static IEnumerable<ControlUsageError> ValidateUsage(ResolvedControl contr
             if (routeNameProperty is not ResolvedPropertyValue { Value: string routeName })
                 yield break;
 
-            if (!configuration.RouteTable.Contains(routeName))
+            if (!configuration.RouteTable.TryGetValue(routeName, out var route))
             {
                 yield return new ControlUsageError(
                     $"RouteName \"{routeName}\" does not exist.",
                     routeNameProperty.DothtmlNode);
                 yield break;
             }
 
-            var parameterDefinitions = configuration.RouteTable[routeName].ParameterNames;
+            if (control.GetValue(CultureProperty) is ResolvedPropertyValue { Value: string culture }
+                && !string.IsNullOrEmpty(culture))
+            {
+                if (route is not LocalizedDotvvmRoute localizedRoute)
+                {
+                    yield return new ControlUsageError($"The route {routeName} must be localizable if the {nameof(Culture)} property is set!");
+                }
+                else
+                {
+                    route = localizedRoute.GetRouteForCulture(culture);
+                }
+            }
+
+            var parameterDefinitions = route!.ParameterNames;
             var parameterReferences = control.Properties.Where(i => i.Key is GroupedDotvvmProperty p && p.PropertyGroup == ParamsGroupDescriptor);
 
             var undefinedReferences =

src/Framework/Framework/Controls/RouteLinkCapability.cs

@@ -19,5 +19,7 @@ public sealed record RouteLinkCapability
 
         [DefaultValue(null)]
         public ValueOrBinding<string>? UrlSuffix { get; init; }
+
+        public string? Culture { get; init; }
     }
 }

src/Framework/Framework/Controls/RouteLinkHelpers.cs

@@ -87,7 +87,7 @@ public static string EvaluateRouteUrl(string routeName, RouteLink control, IDotv
 
         private static string GenerateRouteUrlCore(string routeName, RouteLink control, IDotvvmRequestContext context)
         {
-            var route = GetRoute(context, routeName);
+            var route = GetRoute(context, routeName, control.Culture);
             var parameters = ComposeNewRouteParameters(control, context, route);
 
             // evaluate bindings on server
@@ -114,9 +114,18 @@ private static string GenerateUrlSuffixCore(string? urlSuffix, RouteLink control
             return UrlHelper.BuildUrlSuffix(urlSuffix, queryParams);
         }
 
-        private static RouteBase GetRoute(IDotvvmRequestContext context, string routeName)
+        private static RouteBase GetRoute(IDotvvmRequestContext context, string routeName, string? cultureIdentifier)
         {
-            return context.Configuration.RouteTable[routeName];
+            var route = context.Configuration.RouteTable[routeName];
+            if (!string.IsNullOrEmpty(cultureIdentifier))
+            {
+                if (route is not LocalizedDotvvmRoute localizedRoute)
+                {
+                    throw new DotvvmControlException($"The route {routeName} is not localizable, the Culture property cannot be used!");
+                }
+                route = localizedRoute.GetRouteForCulture(cultureIdentifier!);
+            }
+            return route;
         }
 
         public static string GenerateKnockoutHrefExpression(string routeName, RouteLink control, IDotvvmRequestContext context)
@@ -146,7 +155,7 @@ public static string GenerateKnockoutHrefExpression(string routeName, RouteLink
 
         private static string GenerateRouteLinkCore(string routeName, RouteLink control, IDotvvmRequestContext context)
         {
-            var route = GetRoute(context, routeName);
+            var route = GetRoute(context, routeName, control.Culture);
             var parameters = ComposeNewRouteParameters(control, context, route);
 
             var parametersExpression = parameters.Select(p => TranslateRouteParameter(control, p)).StringJoin(",");

src/Framework/Framework/Hosting/HostingConstants.cs

@@ -28,5 +28,12 @@ public class HostingConstants
         public const string DotvvmFileUploadAsyncHeaderName = "X-DotVVM-AsyncUpload";
 
         public const string HostAppModeKey = "host.AppMode";
+
+        /// <summary>
+        /// When this key is set to true in the OWIN environment, the request culture will not be set by DotVVM to config.DefaultCulture.
+        /// Use this key when the request culture is set by the host or the middleware preceding DotVVM.
+        /// See https://github.com/riganti/dotvvm/blob/93107dd07127ff2bd29c2934f3aa2a26ec2ca79c/src/Samples/Owin/Startup.cs#L34
+        /// </summary>
+        public const string OwinDoNotSetRequestCulture = "OwinDoNotSetRequestCulture";
     }
 }

src/Framework/Framework/Hosting/Middlewares/DotvvmRoutingMiddleware.cs

@@ -38,10 +38,9 @@ private static bool TryParseGooglebotHashbangEscapedFragment(string queryString,
             return false;
         }
 
-        public static RouteBase? FindMatchingRoute(IEnumerable<RouteBase> routes, IDotvvmRequestContext context, out IDictionary<string, object?>? parameters)
+        public static string GetRouteMatchUrl(IDotvvmRequestContext context)
         {
-            string? url;
-            if (!TryParseGooglebotHashbangEscapedFragment(context.HttpContext.Request.Url.Query, out url))
+            if (!TryParseGooglebotHashbangEscapedFragment(context.HttpContext.Request.Url.Query, out var url))
             {
                 url = context.HttpContext.Request.Path.Value;
             }
@@ -52,29 +51,58 @@ private static bool TryParseGooglebotHashbangEscapedFragment(string queryString,
             {
                 url = url.Substring(HostingConstants.SpaUrlIdentifier.Length).Trim('/');
             }
+            return url;
+        }
 
-
-            // find the route
+        internal static RouteBase? FindExactMatchRoute(IEnumerable<RouteBase> routes, string matchUrl, out IDictionary<string, object?>? parameters)
+        {
             foreach (var r in routes)
             {
-                if (r.IsMatch(url, out parameters)) return r;
+                if (r.IsMatch(matchUrl, out parameters))
+                {
+                    return r;
+                }
             }
             parameters = null;
             return null;
         }
 
+        public static RouteBase? FindMatchingRoute(DotvvmRouteTable routes, IDotvvmRequestContext context, out IDictionary<string, object?>? parameters, out bool isPartialMatch)
+        {
+            var url = GetRouteMatchUrl(context);
+
+            var route = FindExactMatchRoute(routes, url, out parameters);
+            if (route is { })
+            {
+                isPartialMatch = false;
+                return route;
+            }
+
+            foreach (var r in routes.PartialMatchRoutes)
+            {
+                if (r.IsPartialMatch(url, out var matchedRoute, out parameters))
+                {
+                    isPartialMatch = true;
+                    return matchedRoute;
+                }
+            }
+
+            isPartialMatch = false;
+            parameters = null;
+            return null;
+        }
 
         public async Task<bool> Handle(IDotvvmRequestContext context)
         {
             var requestTracer = context.Services.GetRequiredService<AggregateRequestTracer>();
 
             await requestTracer.TraceEvent(RequestTracingConstants.BeginRequest, context);
 
-            var route = FindMatchingRoute(context.Configuration.RouteTable, context, out var parameters);
+            var route = FindMatchingRoute(context.Configuration.RouteTable, context, out var parameters, out var isPartialMatch);
 
             //check if route exists
             if (route == null) return false;
-
+            
             var timer = ValueStopwatch.StartNew();
 
             context.Route = route;
@@ -83,12 +111,25 @@ public async Task<bool> Handle(IDotvvmRequestContext context)
 
             WriteSecurityHeaders(context);
 
+
             var filters =
                 ActionFilterHelper.GetActionFilters<IPresenterActionFilter>(presenter.GetType().GetTypeInfo())
                 .Concat(context.Configuration.Runtime.GlobalFilters.OfType<IPresenterActionFilter>());
             try
             {
                 foreach (var f in filters) await f.OnPresenterExecutingAsync(context);
+
+                if (isPartialMatch)
+                {
+                    foreach (var handler in context.Configuration.RouteTable.PartialMatchHandlers)
+                    {
+                        if (await handler.TryHandlePartialMatch(context))
+                        {
+                            break;
+                        }
+                    }
+                }
+
                 await presenter.ProcessRequest(context);
                 foreach (var f in filters) await f.OnPresenterExecutedAsync(context);
             }

src/Framework/Framework/ResourceManagement/LocalResourceUrlManager.cs

@@ -65,7 +65,9 @@ protected virtual string GetVersionHash(ILocalResourceLocation location, IDotvvm
         public ILocalResourceLocation? FindResource(string url, IDotvvmRequestContext context, out string? mimeType)
         {
             mimeType = null;
-            if (DotvvmRoutingMiddleware.FindMatchingRoute(new[] { resourceRoute }, context, out var parameters) == null)
+
+            var routeMatchUrl = DotvvmRoutingMiddleware.GetRouteMatchUrl(context);
+            if (DotvvmRoutingMiddleware.FindExactMatchRoute(new[] { resourceRoute }, routeMatchUrl, out var parameters) == null)
             {
                 return null;
             }

src/Framework/Framework/Routing/CanonicalRedirectPartialMatchRouteHandler.cs

@@ -0,0 +1,18 @@
+using System.Threading.Tasks;
+using DotVVM.Framework.Hosting;
+
+namespace DotVVM.Framework.Routing;
+
+public class CanonicalRedirectPartialMatchRouteHandler : IPartialMatchRouteHandler
+{
+    /// <summary>
+    /// Indicates whether a permanent redirect shall be used.
+    /// </summary>
+    public bool IsPermanentRedirect { get; set; }
+
+    public Task<bool> TryHandlePartialMatch(IDotvvmRequestContext context)
+    {
+        context.RedirectToRoute(context.Route!.RouteName, context.Parameters);
+        return Task.FromResult(true);
+    }
+}

src/Framework/Framework/Routing/DotvvmRoute.cs

@@ -20,12 +20,15 @@ public sealed class DotvvmRoute : RouteBase
         private List<Func<Dictionary<string, string?>, string>> urlBuilders;
         private List<KeyValuePair<string, Func<string, ParameterParseResult>?>> parameters;
         private string urlWithoutTypes;
+        private List<KeyValuePair<string, DotvvmRouteParameterMetadata>> parameterMetadata;
 
         /// <summary>
         /// Gets the names of the route parameters in the order in which they appear in the URL.
         /// </summary>
         public override IEnumerable<string> ParameterNames => parameters.Select(p => p.Key);
 
+        public override IEnumerable<KeyValuePair<string, DotvvmRouteParameterMetadata>> ParameterMetadata => parameterMetadata;
+
         public override string UrlWithoutTypes => urlWithoutTypes;
 
 
@@ -77,6 +80,7 @@ private void ParseRouteUrl(DotvvmConfiguration configuration)
             routeRegex = result.RouteRegex;
             urlBuilders = result.UrlBuilders;
             parameters = result.Parameters;
+            parameterMetadata = result.ParameterMetadata;
             urlWithoutTypes = result.UrlWithoutTypes;
         }
 
@@ -123,7 +127,7 @@ public override bool IsMatch(string url, [MaybeNullWhen(false)] out IDictionary<
         /// <summary>
         /// Builds the URL core from the parameters.
         /// </summary>
-        protected override string BuildUrlCore(Dictionary<string, object?> values)
+        protected internal override string BuildUrlCore(Dictionary<string, object?> values)
         {
             var convertedValues =
                 values.ToDictionary(

src/Framework/Framework/Routing/DotvvmRouteParser.cs

@@ -25,13 +25,15 @@ public UrlParserResult ParseRouteUrl(string url, IDictionary<string, object?> de
 
             var regex = new StringBuilder("^");
             var parameters = new List<KeyValuePair<string, Func<string, ParameterParseResult>?>>();
+            var parameterMetadata = new List<KeyValuePair<string, DotvvmRouteParameterMetadata>>();
             var urlBuilders = new List<Func<Dictionary<string, string?>, string>>();
             urlBuilders.Add(_ => "~");
 
             void AppendParameterParserResult(UrlParameterParserResult result)
             {
                 regex.Append(result.ParameterRegexPart);
                 parameters.Add(result.Parameter);
+                parameterMetadata.Add(new KeyValuePair<string, DotvvmRouteParameterMetadata>(result.Parameter.Key, result.Metadata));
                 urlBuilders.Add(result.UrlBuilder);
             }
 
@@ -78,6 +80,7 @@ void AppendParameterParserResult(UrlParameterParserResult result)
                 RouteRegex = new Regex(regex.ToString(), RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant),
                 UrlBuilders = urlBuilders,
                 Parameters = parameters,
+                ParameterMetadata = parameterMetadata,
                 UrlWithoutTypes = string.Concat(urlBuilders.Skip(1).Select(b => b(fakeParameters))).TrimStart('/')
             };
         }
@@ -109,6 +112,7 @@ private UrlParameterParserResult ParseParameter(string url, string prefix, ref i
             // determine route parameter constraint
             IRouteParameterConstraint? type = null;
             string? parameter = null;
+            string? typeName = null;
             if (url[index] == ':')
             {
                 startIndex = index + 1;
@@ -118,7 +122,7 @@ private UrlParameterParserResult ParseParameter(string url, string prefix, ref i
                     throw new ArgumentException($"The route URL '{url}' is not valid! It contains an unclosed parameter.");
                 }
 
-                var typeName = url.Substring(startIndex, index - startIndex);
+                typeName = url.Substring(startIndex, index - startIndex);
                 if (!routeConstraints.ContainsKey(typeName))
                 {
                     throw new ArgumentException($"The route parameter constraint '{typeName}' is not valid!");
@@ -181,7 +185,8 @@ private UrlParameterParserResult ParseParameter(string url, string prefix, ref i
             {
                 ParameterRegexPart = result,
                 UrlBuilder = urlBuilder,
-                Parameter = parameterParser
+                Parameter = parameterParser,
+                Metadata = new DotvvmRouteParameterMetadata(isOptional, parameter != null ? $"{typeName}({parameter})" : typeName)
             };
         }
 
@@ -190,14 +195,18 @@ private struct UrlParameterParserResult
             public string ParameterRegexPart { get; set; }
             public Func<Dictionary<string, string?>, string> UrlBuilder { get; set; }
             public KeyValuePair<string, Func<string, ParameterParseResult>?> Parameter { get; set; }
+            public DotvvmRouteParameterMetadata Metadata { get; set; }
         }
     }
 
+    public record DotvvmRouteParameterMetadata(bool IsOptional, string? ConstraintName);
+
     public struct UrlParserResult
     {
         public Regex RouteRegex { get; set; }
         public List<Func<Dictionary<string, string?>, string>> UrlBuilders { get; set; }
         public List<KeyValuePair<string, Func<string, ParameterParseResult>?>> Parameters { get; set; }
         public string UrlWithoutTypes { get; set; }
+        public List<KeyValuePair<string, DotvvmRouteParameterMetadata>> ParameterMetadata { get; set; }
     }
 }