[Fusion] Added @fusion__schema_metadata to fusion__Schema enum values (#8508)

Author: glen-84

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Definitions/FusionSchemaMetadataMutableDirectiveDefinition.cs

@@ -0,0 +1,27 @@
+using HotChocolate.Types;
+using HotChocolate.Types.Mutable;
+using static HotChocolate.Fusion.Properties.CompositionResources;
+using static HotChocolate.Fusion.WellKnownDirectiveNames;
+using argNames = HotChocolate.Fusion.WellKnownArgumentNames;
+
+namespace HotChocolate.Fusion.Definitions;
+
+/// <summary>
+/// The <c>@fusion__schema_metadata</c> directive is used to provide additional metadata for a
+/// source schema.
+/// </summary>
+internal sealed class FusionSchemaMetadataMutableDirectiveDefinition : MutableDirectiveDefinition
+{
+    public FusionSchemaMetadataMutableDirectiveDefinition(MutableScalarTypeDefinition stringType)
+        : base(FusionSchemaMetadata)
+    {
+        Description = FusionSchemaMetadataMutableDirectiveDefinition_Description;
+
+        Arguments.Add(new MutableInputFieldDefinition(argNames.Name, new NonNullType(stringType))
+        {
+            Description = FusionSchemaMetadataMutableDirectiveDefinition_Argument_Name_Description
+        });
+
+        Locations = DirectiveLocation.EnumValue;
+    }
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Definitions/FusionSchemaMutableEnumTypeDefinition.cs

@@ -1,4 +1,5 @@
 using System.Collections.Immutable;
+using HotChocolate.Types;
 using HotChocolate.Types.Mutable;
 using static HotChocolate.Fusion.Properties.CompositionResources;
 using static HotChocolate.Fusion.StringUtilities;
@@ -19,7 +20,18 @@ public FusionSchemaMutableEnumTypeDefinition(ImmutableArray<string> schemaNames)
 
         foreach (var schemaName in schemaNames)
         {
-            Values.Add(new MutableEnumValue(ToConstantCase(schemaName)));
+            var enumValue = new MutableEnumValue(ToConstantCase(schemaName))
+            {
+                Directives =
+                {
+                    new Directive(
+                        new FusionSchemaMetadataMutableDirectiveDefinition(
+                            BuiltIns.String.Create()),
+                        new ArgumentAssignment(WellKnownArgumentNames.Name, schemaName))
+                }
+            };
+
+            Values.Add(enumValue);
         }
     }
 }

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Properties/CompositionResources.Designer.cs

@@ -123,6 +123,12 @@
   <data name="FusionRequiresMutableDirectiveDefinition_Description" xml:space="preserve">
     <value>The @fusion__requires directive specifies if a field has requirements on a source schema.</value>
   </data>
+  <data name="FusionSchemaMetadataMutableDirectiveDefinition_Argument_Name_Description" xml:space="preserve">
+    <value>The name of the source schema.</value>
+  </data>
+  <data name="FusionSchemaMetadataMutableDirectiveDefinition_Description" xml:space="preserve">
+    <value>The @fusion__schema_metadata directive is used to provide additional metadata for a source schema.</value>
+  </data>
   <data name="FusionSchemaMutableEnumTypeDefinition_Description" xml:space="preserve">
     <value>The fusion__Schema enum is a generated type used within an execution schema document to refer to a source schema in a type-safe manner.</value>
   </data>

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Properties/CompositionResources.resx

@@ -1235,6 +1235,10 @@ private FrozenDictionary<string, MutableDirectiveDefinition> CreateFusionDirecti
                     fieldDefinitionType,
                     fieldSelectionMapType)
             },
+            {
+                DirectiveNames.FusionSchemaMetadata,
+                new FusionSchemaMetadataMutableDirectiveDefinition(stringType)
+            },
             {
                 DirectiveNames.FusionType,
                 new FusionTypeMutableDirectiveDefinition(schemaEnumType)

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/SourceSchemaMerger.cs

@@ -10,6 +10,7 @@ internal static class WellKnownArgumentNames
     public const string Key = "key";
     public const string Map = "map";
     public const string Member = "member";
+    public const string Name = "name";
     public const string Partial = "partial";
     public const string Path = "path";
     public const string Provides = "provides";

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/WellKnownArgumentNames.cs

@@ -10,6 +10,7 @@ internal static class WellKnownDirectiveNames
     public const string FusionInputField = "fusion__inputField";
     public const string FusionLookup = "fusion__lookup";
     public const string FusionRequires = "fusion__requires";
+    public const string FusionSchemaMetadata = "fusion__schema_metadata";
     public const string FusionType = "fusion__type";
     public const string FusionUnionMember = "fusion__unionMember";
     public const string Inaccessible = "inaccessible";

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/WellKnownDirectiveNames.cs

@@ -71,8 +71,13 @@ type PageInfo {
 "The fusion__Schema enum is a generated type used within an execution schema document to refer to a source schema in a type-safe manner."
 enum fusion__Schema {
   A
+    @fusion__schema_metadata(name: "A")
   B
+    @fusion__schema_metadata(name: "B")
 }
 
 "The @fusion__inaccessible directive is used to prevent specific type system members from being accessible through the client-facing composite schema, even if they are accessible in the underlying source schemas."
 directive @fusion__inaccessible on SCALAR | OBJECT | FIELD_DEFINITION | ARGUMENT_DEFINITION | INTERFACE | UNION | ENUM | ENUM_VALUE | INPUT_OBJECT | INPUT_FIELD_DEFINITION
+
+"The @fusion__schema_metadata directive is used to provide additional metadata for a source schema."
+directive @fusion__schema_metadata("The name of the source schema." name: String!) on ENUM_VALUE

src/HotChocolate/Fusion-vnext/test/Fusion.AspNetCore.Tests/__snapshots__/IntrospectionTests.Download_Schema.graphql

@@ -30,7 +30,9 @@ type User
 "The fusion__Schema enum is a generated type used within an execution schema document to refer to a source schema in a type-safe manner."
 enum fusion__Schema {
   SCHEMA1
+    @fusion__schema_metadata(name: "Schema1")
   SCHEMA2
+    @fusion__schema_metadata(name: "Schema2")
 }
 
 "The fusion__FieldDefinition scalar is used to represent a GraphQL field definition specified in the GraphQL spec."
@@ -66,6 +68,9 @@ directive @fusion__lookup("The GraphQL field definition in the source schema tha
 "The @fusion__requires directive specifies if a field has requirements on a source schema."
 directive @fusion__requires("The GraphQL field definition in the source schema that this field depends on." field: fusion__FieldDefinition! "The map describes how the argument values for the source schema are resolved from the arguments of the field exposed in the client-facing composite schema and from required data relative to the current type." map: [fusion__FieldSelectionMap]! "A selection set on the annotated field that describes its requirements." requirements: fusion__FieldSelectionSet! "The name of the source schema where this field has requirements to data on other source schemas." schema: fusion__Schema!) repeatable on FIELD_DEFINITION
 
+"The @fusion__schema_metadata directive is used to provide additional metadata for a source schema."
+directive @fusion__schema_metadata("The name of the source schema." name: String!) on ENUM_VALUE
+
 "The @fusion__type directive specifies which source schemas provide parts of a composite type."
 directive @fusion__type("The name of the source schema that originally provided part of the annotated type." schema: fusion__Schema!) repeatable on SCALAR | OBJECT | INTERFACE | UNION | ENUM | INPUT_OBJECT
 

src/HotChocolate/Fusion-vnext/test/Fusion.CommandLine.Tests/__resources__/invalid-example-1-result/composite-schema.graphqls

@@ -14,7 +14,9 @@ type Query
 "The fusion__Schema enum is a generated type used within an execution schema document to refer to a source schema in a type-safe manner."
 enum fusion__Schema {
   SCHEMA1
+    @fusion__schema_metadata(name: "Schema1")
   SCHEMA2
+    @fusion__schema_metadata(name: "Schema2")
 }
 
 "The fusion__FieldDefinition scalar is used to represent a GraphQL field definition specified in the GraphQL spec."
@@ -50,6 +52,9 @@ directive @fusion__lookup("The GraphQL field definition in the source schema tha
 "The @fusion__requires directive specifies if a field has requirements on a source schema."
 directive @fusion__requires("The GraphQL field definition in the source schema that this field depends on." field: fusion__FieldDefinition! "The map describes how the argument values for the source schema are resolved from the arguments of the field exposed in the client-facing composite schema and from required data relative to the current type." map: [fusion__FieldSelectionMap]! "A selection set on the annotated field that describes its requirements." requirements: fusion__FieldSelectionSet! "The name of the source schema where this field has requirements to data on other source schemas." schema: fusion__Schema!) repeatable on FIELD_DEFINITION
 
+"The @fusion__schema_metadata directive is used to provide additional metadata for a source schema."
+directive @fusion__schema_metadata("The name of the source schema." name: String!) on ENUM_VALUE
+
 "The @fusion__type directive specifies which source schemas provide parts of a composite type."
 directive @fusion__type("The name of the source schema that originally provided part of the annotated type." schema: fusion__Schema!) repeatable on SCALAR | OBJECT | INTERFACE | UNION | ENUM | INPUT_OBJECT