- fixes inheritance from intersection type

Signed-off-by: Vincent Biret <vibiret@microsoft.com>

src/Kiota.Builder/Extensions/OpenApiSchemaExtensions.cs

@@ -80,13 +80,17 @@ public static bool IsInherited(this OpenApiSchema? schema)
             isRootSchemaMeaningful);
     }
 
-    internal static OpenApiSchema? MergeIntersectionSchemaEntries(this OpenApiSchema? schema)
+    internal static OpenApiSchema? MergeIntersectionSchemaEntries(this OpenApiSchema? schema, HashSet<OpenApiSchema>? schemasToExclude = default)
     {
         if (schema is null) return null;
         if (!schema.IsIntersection()) return schema;
         var result = new OpenApiSchema(schema);
         result.AllOf.Clear();
-        var meaningfulSchemas = schema.AllOf.Where(static x => x.IsSemanticallyMeaningful()).Select(MergeIntersectionSchemaEntries).Where(x => x is not null).OfType<OpenApiSchema>();
+        var meaningfulSchemas = schema.AllOf
+                                    .Where(static x => x.IsSemanticallyMeaningful())
+                                    .Select(x => MergeIntersectionSchemaEntries(x, schemasToExclude))
+                                    .Where(x => x is not null && (schemasToExclude is null || !schemasToExclude.Contains(x)))
+                                    .OfType<OpenApiSchema>();
         meaningfulSchemas.SelectMany(static x => x.Properties).ToList().ForEach(x => result.Properties.TryAdd(x.Key, x.Value));
         return result;
     }

src/Kiota.Builder/KiotaBuilder.cs

@@ -1554,9 +1554,11 @@ private CodeType CreateInheritedModelDeclaration(OpenApiUrlTreeNode currentNode,
         var allOfs = schema.AllOf.FlattenSchemaIfRequired(static x => x.AllOf)
                     .Union(isRootSchemaMeaningful ?
                         [schema] :
-                        Array.Empty<OpenApiSchema>());
-        CodeElement? codeDeclaration = null;
+                        Array.Empty<OpenApiSchema>())
+                    .ToArray();
+        CodeClass? codeDeclaration = null;
         var codeNamespaceFromParent = GetShortestNamespace(codeNamespace, schema);
+        OpenApiSchema? previousSchema = null;
         foreach (var currentSchema in allOfs)
         {
             var referenceId = GetReferenceIdFromOriginalSchema(currentSchema, schema);
@@ -1568,10 +1570,14 @@ private CodeType CreateInheritedModelDeclaration(OpenApiUrlTreeNode currentNode,
                                 typeNameForInlineSchema :
                                 currentNode.GetClassName(config.StructuredMimeTypes, operation: operation, suffix: classNameSuffix, schema: currentSchema, requestBody: isRequestBody)))
                         .CleanupSymbolName();
-            if (shortestNamespace != null)
-                codeDeclaration = AddModelDeclarationIfDoesntExist(currentNode, currentSchema, className, shortestNamespace, codeDeclaration as CodeClass);
+            if (shortestNamespace != null &&
+                AddModelDeclarationIfDoesntExist(currentNode, currentSchema, className, shortestNamespace, codeDeclaration, previousSchema) is CodeClass addedDeclaration)
+            {
+                codeDeclaration = addedDeclaration;
+                previousSchema = currentSchema;
+            }
         }
-        if (codeDeclaration is CodeClass currentClass &&
+        if (codeDeclaration is { } currentClass &&
             !currentClass.Documentation.DescriptionAvailable &&
             string.IsNullOrEmpty(schema.AllOf.LastOrDefault()?.Description) &&
             !string.IsNullOrEmpty(schema.Description))
@@ -1741,13 +1747,22 @@ private CodeNamespace GetSearchNamespace(OpenApiUrlTreeNode currentNode, CodeNam
         return currentNamespace;
     }
     private ConcurrentDictionary<string, ModelClassBuildLifecycle> classLifecycles = new(StringComparer.OrdinalIgnoreCase);
-    private CodeElement AddModelDeclarationIfDoesntExist(OpenApiUrlTreeNode currentNode, OpenApiSchema schema, string declarationName, CodeNamespace currentNamespace, CodeClass? inheritsFrom = null)
+    private CodeElement AddModelDeclarationIfDoesntExist(OpenApiUrlTreeNode currentNode, OpenApiSchema schema, string declarationName, CodeNamespace currentNamespace, CodeClass? inheritsFrom = null, OpenApiSchema? parentSchemaToExcludeForIntersections = null)
     {
         if (GetExistingDeclaration(currentNamespace, currentNode, declarationName) is not CodeElement existingDeclaration) // we can find it in the components
         {
             if (AddEnumDeclaration(currentNode, schema, declarationName, currentNamespace) is CodeEnum enumDeclaration)
                 return enumDeclaration;
 
+            if (schema.IsIntersection() &&
+                (parentSchemaToExcludeForIntersections is null ?
+                    schema.MergeIntersectionSchemaEntries() :
+                    schema.MergeIntersectionSchemaEntries([parentSchemaToExcludeForIntersections])) is OpenApiSchema mergedSchema &&
+                AddModelDeclarationIfDoesntExist(currentNode, mergedSchema, declarationName, currentNamespace, inheritsFrom) is CodeClass createdClass)
+            {
+                // multiple allOf entries that do not translate to inheritance
+                return createdClass;
+            }
             return AddModelClass(currentNode, schema, declarationName, currentNamespace, inheritsFrom);
         }
         return existingDeclaration;
@@ -2077,7 +2092,7 @@ internal static void AddDiscriminatorMethod(CodeClass newClass, string discrimin
             logger.LogWarning("Discriminator {ComponentKey} is not inherited from {ClassName}.", componentKey, baseClass.Name);
             return null;
         }
-        var codeClass = AddModelDeclarationIfDoesntExist(currentNode, discriminatorSchema, className, GetShortestNamespace(currentNamespace, discriminatorSchema), shouldInherit ? baseClass : null);
+        var codeClass = AddModelDeclarationIfDoesntExist(currentNode, discriminatorSchema, className, GetShortestNamespace(currentNamespace, discriminatorSchema), shouldInherit ? baseClass : null, currentSchema);
         return new CodeType
         {
             TypeDefinition = codeClass,

tests/Kiota.Builder.Tests/KiotaBuilderTests.cs

@@ -7396,7 +7396,7 @@ public async Task InheritanceWithAllOfInBaseType()
         Assert.NotNull(codeModel.FindChildByName<CodeClass>("Group"));
     }
     [Fact]
-    public async Task InheritanceWithAllOfWith3Parts3Schema()
+    public async Task InheritanceWithAllOfWith3Parts3SchemaChildClass()
     {
         var tempFilePath = Path.Combine(Path.GetTempPath(), Path.GetTempFileName());
         await using var fs = await GetDocumentStream(@"openapi: 3.0.1
@@ -7426,9 +7426,7 @@ public async Task InheritanceWithAllOfWith3Parts3Schema()
 components:
   schemas:
     microsoft.graph.directoryObject:
-      title: 'directoryObject'
       required: ['@odata.type']
-      type: 'object'
       properties:
         '@odata.type':
           type: 'string'
@@ -7438,16 +7436,12 @@ public async Task InheritanceWithAllOfWith3Parts3Schema()
         mapping:
           '#microsoft.graph.group': '#/components/schemas/microsoft.graph.group'
     microsoft.graph.groupFacet1:
-      title: 'group part 1'
-      type: 'object'
       properties:
-        groupprop1:
+        facetprop1:
           type: 'string'
     microsoft.graph.groupFacet2:
-      title: 'group part 2'
-      type: 'object'
       properties:
-        groupprop2:
+        facetprop2:
           type: 'string'
     microsoft.graph.group:
       title: 'group'
@@ -7461,15 +7455,95 @@ public async Task InheritanceWithAllOfWith3Parts3Schema()
         var node = builder.CreateUriSpace(document);
         var codeModel = builder.CreateSourceModel(node);
         var directoryObjectClass = codeModel.FindChildByName<CodeClass>("DirectoryObject");
+        Assert.Null(directoryObjectClass.StartBlock.Inherits);
         Assert.NotNull(directoryObjectClass);
-        var resultClass = codeModel.FindChildByName<CodeClass>("Group");
-        Assert.NotNull(resultClass);
-        Assert.Equal(4, resultClass.Properties.Count());
-        Assert.Null(resultClass.StartBlock.Inherits);
-        Assert.Single(resultClass.Properties.Where(static x => x.Kind is CodePropertyKind.AdditionalData));
-        Assert.Single(resultClass.Properties.Where(static x => x.Name.Equals("oDataType", StringComparison.OrdinalIgnoreCase)));
-        Assert.Single(resultClass.Properties.Where(static x => x.Name.Equals("groupprop1", StringComparison.OrdinalIgnoreCase)));
-        Assert.Single(resultClass.Properties.Where(static x => x.Name.Equals("groupprop2", StringComparison.OrdinalIgnoreCase)));
+        var groupClass = codeModel.FindChildByName<CodeClass>("Group");
+        Assert.NotNull(groupClass);
+        Assert.Equal(4, groupClass.Properties.Count());
+        Assert.Null(groupClass.StartBlock.Inherits);
+        Assert.Single(groupClass.Properties.Where(static x => x.Kind is CodePropertyKind.AdditionalData));
+        Assert.Single(groupClass.Properties.Where(static x => x.Name.Equals("oDataType", StringComparison.OrdinalIgnoreCase)));
+        Assert.Single(groupClass.Properties.Where(static x => x.Name.Equals("facetprop1", StringComparison.OrdinalIgnoreCase)));
+        Assert.Single(groupClass.Properties.Where(static x => x.Name.Equals("facetprop2", StringComparison.OrdinalIgnoreCase)));
+    }
+    [Fact]
+    public async Task InheritanceWithAllOfWith3Parts3SchemaParentClass()
+    {
+        var tempFilePath = Path.Combine(Path.GetTempPath(), Path.GetTempFileName());
+        await using var fs = await GetDocumentStream(@"openapi: 3.0.1
+info:
+  title: OData Service for namespace microsoft.graph
+  description: This OData service is located at https://graph.microsoft.com/v1.0
+  version: 1.0.1
+servers:
+  - url: https://graph.microsoft.com/v1.0
+paths:
+  /directoryObject:
+    get:
+      responses: 
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/microsoft.graph.directoryObject'
+  /group:
+    get:
+      responses: 
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/microsoft.graph.group'
+components:
+  schemas:
+    microsoft.graph.directoryObject:
+      required: ['@odata.type']
+      properties:
+        '@odata.type':
+          type: 'string'
+          default: '#microsoft.graph.directoryObject'
+      allOf:
+        - '$ref': '#/components/schemas/microsoft.graph.directoryObjectFacet1'
+        - '$ref': '#/components/schemas/microsoft.graph.directoryObjectFacet2'
+      discriminator:
+        propertyName: '@odata.type'
+        mapping:
+          '#microsoft.graph.group': '#/components/schemas/microsoft.graph.group'
+    microsoft.graph.directoryObjectFacet1:
+      properties:
+        facetprop1:
+          type: 'string'
+    microsoft.graph.directoryObjectFacet2:
+      properties:
+        facetprop2:
+          type: 'string'
+    microsoft.graph.group:
+      allOf:
+        - '$ref': '#/components/schemas/microsoft.graph.directoryObject'
+      properties:
+        groupprop1:
+          type: 'string'");
+        var mockLogger = new Mock<ILogger<KiotaBuilder>>();
+        var builder = new KiotaBuilder(mockLogger.Object, new GenerationConfiguration { ClientClassName = "Graph", OpenAPIFilePath = tempFilePath }, _httpClient);
+        var document = await builder.CreateOpenApiDocumentAsync(fs);
+        var node = builder.CreateUriSpace(document);
+        var codeModel = builder.CreateSourceModel(node);
+        var directoryObjectClass = codeModel.FindChildByName<CodeClass>("DirectoryObject");
+        Assert.NotNull(directoryObjectClass);
+        Assert.Null(directoryObjectClass.StartBlock.Inherits);
+        Assert.Single(directoryObjectClass.Properties.Where(static x => x.Kind is CodePropertyKind.AdditionalData));
+        Assert.Single(directoryObjectClass.Properties.Where(static x => x.Name.Equals("oDataType", StringComparison.OrdinalIgnoreCase)));
+        Assert.Single(directoryObjectClass.Properties.Where(static x => x.Name.Equals("facetprop1", StringComparison.OrdinalIgnoreCase)));
+        Assert.Single(directoryObjectClass.Properties.Where(static x => x.Name.Equals("facetprop2", StringComparison.OrdinalIgnoreCase)));
+        var groupClass = codeModel.FindChildByName<CodeClass>("Group");
+        Assert.NotNull(groupClass);
+        Assert.Single(groupClass.Properties);
+        Assert.NotNull(groupClass.StartBlock.Inherits);
+        Assert.Empty(groupClass.Properties.Where(static x => x.Kind is CodePropertyKind.AdditionalData));
+        Assert.Empty(groupClass.Properties.Where(static x => x.Name.Equals("oDataType", StringComparison.OrdinalIgnoreCase)));
+        Assert.Empty(groupClass.Properties.Where(static x => x.Name.Equals("facetprop1", StringComparison.OrdinalIgnoreCase)));
+        Assert.Empty(groupClass.Properties.Where(static x => x.Name.Equals("facetprop2", StringComparison.OrdinalIgnoreCase)));
+        Assert.Single(groupClass.Properties.Where(static x => x.Name.Equals("groupprop1", StringComparison.OrdinalIgnoreCase)));
     }
     [Fact]
     public async Task InheritanceWithAllOfWith2Parts1Schema1InlineNoDiscriminator()
@@ -7569,8 +7643,10 @@ public async Task InheritanceWithAllOfWith1Part1SchemaAndPropertiesNoDiscriminat
         Assert.Single(resultClass.Properties);
         Assert.Single(resultClass.Properties.Where(static x => x.Name.Equals("groupprop1", StringComparison.OrdinalIgnoreCase)));
     }
-    [Fact]
-    public async Task InheritanceWithAllOfWith3Parts1Schema2Inline()
+    [InlineData(true)]
+    [InlineData(false)]
+    [Theory]
+    public async Task InheritanceWithAllOfWith3Parts1Schema2Inline(bool reverseOrder)
     {
         var tempFilePath = Path.Combine(Path.GetTempPath(), Path.GetTempFileName());
         await using var fs = await GetDocumentStream(@"openapi: 3.0.1
@@ -7592,9 +7668,7 @@ public async Task InheritanceWithAllOfWith3Parts1Schema2Inline()
 components:
   schemas:
     microsoft.graph.directoryObject:
-      title: 'directoryObject'
       required: ['@odata.type']
-      type: 'object'
       properties:
         '@odata.type':
           type: 'string'
@@ -7604,18 +7678,16 @@ public async Task InheritanceWithAllOfWith3Parts1Schema2Inline()
         mapping:
           '#microsoft.graph.group': '#/components/schemas/microsoft.graph.group'
     microsoft.graph.group:
-      allOf:
-        - '$ref': '#/components/schemas/microsoft.graph.directoryObject'
-        - title: 'group part 1'
-          type: 'object'
-          properties:
+      allOf:"
+       + (reverseOrder ? "" : @" 
+        - '$ref': '#/components/schemas/microsoft.graph.directoryObject'") + @"
+        - properties:
             groupprop1:
               type: 'string'
-        - title: 'group part 2'
-          type: 'object'
-          properties:
+        - properties:
             groupprop2:
-              type: 'string'");
+              type: 'string'" + (!reverseOrder ? "" : @" 
+        - '$ref': '#/components/schemas/microsoft.graph.directoryObject'"));
         var mockLogger = new Mock<ILogger<KiotaBuilder>>();
         var builder = new KiotaBuilder(mockLogger.Object, new GenerationConfiguration { ClientClassName = "Graph", OpenAPIFilePath = tempFilePath }, _httpClient);
         var document = await builder.CreateOpenApiDocumentAsync(fs);