fix(visitor-plugin-common): add parent interfaces to interface type

packages/plugins/other/visitor-plugin-common/src/base-types-visitor.ts

@@ -491,6 +491,31 @@ export interface RawTypesConfig extends RawConfig {
    * ```
    */
   directiveArgumentAndInputFieldMappingTypeSuffix?: string;
+  /**
+   * @description When a GraphQL interface is used for a field, this flag will use the implementing types, instead of the interface itself.
+   * @default false
+   *
+   * @exampleMarkdown
+   * ## Override all definition types
+   *
+   * ```ts filename="codegen.ts"
+   * import type { CodegenConfig } from '@graphql-codegen/cli'
+   *
+   * const config: CodegenConfig = {
+   *   // ...
+   *   generates: {
+   *     'path/to/file.ts': {
+   *       plugins: ['typescript'],
+   *       config: {
+   *         useImplementingTypes: true
+   *       }
+   *     }
+   *   }
+   * }
+   * export default config
+   * ```
+   */
+  useImplementingTypes?: boolean;
 }
 
 const onlyUnderscoresPattern = /^_+$/;
@@ -788,14 +813,19 @@ export class BaseTypesVisitor<
 
   getInterfaceTypeDeclarationBlock(
     node: InterfaceTypeDefinitionNode,
-    _originalNode: InterfaceTypeDefinitionNode
+    originalNode: InterfaceTypeDefinitionNode
   ): DeclarationBlock {
     const declarationBlock = new DeclarationBlock(this._declarationBlockConfig)
       .export()
       .asKind(this._parsedConfig.declarationKind.interface)
       .withName(this.convertName(node))
       .withComment(node.description?.value);
 
+    if (!this._parsedConfig.useImplementingTypes) {
+      const interfacesNames = originalNode.interfaces ? originalNode.interfaces.map(i => this.convertName(i)) : [];
+      declarationBlock.withContent(this.mergeInterfaces(interfacesNames, node.fields.length > 0));
+    }
+
     return declarationBlock.withBlock(node.fields.join('\n'));
   }
 

packages/plugins/other/visitor-plugin-common/src/base-visitor.ts

@@ -40,6 +40,7 @@ export interface ParsedConfig {
   importExtension: '' | `.${string}`;
   printFieldsOnNewLines: boolean;
   includeExternalFragments: boolean;
+  useImplementingTypes: boolean;
 }
 
 export interface RawConfig {

packages/plugins/typescript/typescript/src/config.ts

@@ -411,31 +411,6 @@ export interface TypeScriptPluginConfig extends RawTypesConfig {
    * ```
    */
   disableDescriptions?: boolean;
-  /**
-   * @description When a GraphQL interface is used for a field, this flag will use the implementing types, instead of the interface itself.
-   * @default false
-   *
-   * @exampleMarkdown
-   * ## Override all definition types
-   *
-   * ```ts filename="codegen.ts"
-   * import type { CodegenConfig } from '@graphql-codegen/cli'
-   *
-   * const config: CodegenConfig = {
-   *   // ...
-   *   generates: {
-   *     'path/to/file.ts': {
-   *       plugins: ['typescript'],
-   *       config: {
-   *         useImplementingTypes: true
-   *       }
-   *     }
-   *   }
-   * }
-   * export default config
-   * ```
-   */
-  useImplementingTypes?: boolean;
   /**
    * @name wrapEntireFieldDefinitions
    * @type boolean

packages/plugins/typescript/typescript/tests/typescript.spec.ts

@@ -3950,6 +3950,31 @@ describe('TypeScript', () => {
     `);
   });
 
+  it('should list parent interface on an intermediate interface - issue #10515', async () => {
+    const testSchema = buildSchema(/* GraphQL */ `
+      interface TopLevel {
+        topLevelField: Boolean
+      }
+
+      interface MidLevel implements TopLevel {
+        topLevelField: Boolean
+        midLevelField: Int
+      }
+
+      type BottomLevel implements MidLevel & TopLevel {
+        topLevelField: Boolean
+        midLevelField: Int
+        bottomLevelField: String
+      }
+    `);
+
+    const output = (await plugin(testSchema, [], {} as any, { outputFile: 'graphql.ts' })) as Types.ComplexPluginOutput;
+
+    expect(output.content).toBeSimilarStringTo(`
+      type MidLevel = TopLevel & {
+    `);
+  });
+
   it('should use implementing types as node type - issue #5126', async () => {
     const testSchema = buildSchema(/* GraphQL */ `
       type Matrix {