feat: support interface type

src/valibot/index.ts

@@ -5,6 +5,7 @@ import type {
   GraphQLSchema,
   InputObjectTypeDefinitionNode,
   InputValueDefinitionNode,
+  InterfaceTypeDefinitionNode,
   NameNode,
   ObjectTypeDefinitionNode,
   TypeNode,
@@ -16,6 +17,7 @@ import { BaseSchemaVisitor } from '../schema_visitor';
 import type { Visitor } from '../visitor';
 import { buildApiForValibot, formatDirectiveConfig } from '../directive';
 import {
+  InterfaceTypeDefinitionBuilder,
   ObjectTypeDefinitionBuilder,
   isInput,
   isListType,
@@ -51,6 +53,34 @@ export class ValibotSchemaVisitor extends BaseSchemaVisitor {
     };
   }
 
+  get InterfaceTypeDefinition() {
+    return {
+      leave: InterfaceTypeDefinitionBuilder(this.config.withObjectType, (node: InterfaceTypeDefinitionNode) => {
+        const visitor = this.createVisitor('output');
+        const name = visitor.convertName(node.name.value);
+        this.importTypes.push(name);
+
+        // Building schema for field arguments.
+        const argumentBlocks = this.buildTypeDefinitionArguments(node, visitor);
+        const appendArguments = argumentBlocks ? `\n${argumentBlocks}` : '';
+
+        // Building schema for fields.
+        const shape = node.fields?.map(field => generateFieldValibotSchema(this.config, visitor, field, 2)).join(',\n');
+
+        switch (this.config.validationSchemaExportType) {
+          default:
+            return (
+              new DeclarationBlock({})
+                .export()
+                .asKind('function')
+                .withName(`${name}Schema(): v.GenericSchema<${name}>`)
+                .withBlock([indent(`return v.object({`), shape, indent('})')].join('\n')).string + appendArguments
+            );
+        }
+      }),
+    };
+  }
+
   get ObjectTypeDefinition() {
     return {
       leave: ObjectTypeDefinitionBuilder(this.config.withObjectType, (node: ObjectTypeDefinitionNode) => {
@@ -220,6 +250,7 @@ function generateNameNodeValibotSchema(config: ValidationSchemaPluginConfig, vis
   const converter = visitor.getNameNodeConverter(node);
 
   switch (converter?.targetKind) {
+    case 'InterfaceTypeDefinition':
     case 'InputObjectTypeDefinition':
     case 'ObjectTypeDefinition':
     case 'UnionTypeDefinition':

tests/valibot.spec.ts

@@ -610,12 +610,19 @@ describe('valibot', () => {
       `)
     });
   })
-  it('correctly reference generated union types', async () => {
+  it('generate union types with single element', async () => {
     const schema = buildSchema(/* GraphQL */ `
+      type Square {
+        size: Int
+      }
       type Circle {
         radius: Int
       }
-      union Shape = Circle
+      union Shape = Circle | Square
+
+      type Geometry {
+        shape: Shape
+      }
     `);
 
     const result = await plugin(
@@ -631,6 +638,13 @@ describe('valibot', () => {
     expect(result.content).toMatchInlineSnapshot(`
       "
 
+      export function SquareSchema(): v.GenericSchema<Square> {
+        return v.object({
+          __typename: v.optional(v.literal('Square')),
+          size: v.nullish(v.number())
+        })
+      }
+
       export function CircleSchema(): v.GenericSchema<Circle> {
         return v.object({
           __typename: v.optional(v.literal('Circle')),
@@ -639,24 +653,24 @@ describe('valibot', () => {
       }
 
       export function ShapeSchema() {
-        return CircleSchema()
+        return v.union([CircleSchema(), SquareSchema()])
+      }
+
+      export function GeometrySchema(): v.GenericSchema<Geometry> {
+        return v.object({
+          __typename: v.optional(v.literal('Geometry')),
+          shape: v.nullish(ShapeSchema())
+        })
       }
       "
     `)
   });
-  it('generate enum union types', async () => {
+  it('correctly reference generated union types', async () => {
     const schema = buildSchema(/* GraphQL */ `
-      enum PageType {
-        PUBLIC
-        BASIC_AUTH
-      }
-
-      enum MethodType {
-        GET
-        POST
+      type Circle {
+        radius: Int
       }
-
-      union AnyType = PageType | MethodType
+      union Shape = Circle
     `);
 
     const result = await plugin(
@@ -671,29 +685,33 @@ describe('valibot', () => {
 
     expect(result.content).toMatchInlineSnapshot(`
       "
-      export const PageTypeSchema = v.enum_(PageType);
 
-      export const MethodTypeSchema = v.enum_(MethodType);
+      export function CircleSchema(): v.GenericSchema<Circle> {
+        return v.object({
+          __typename: v.optional(v.literal('Circle')),
+          radius: v.nullish(v.number())
+        })
+      }
 
-      export function AnyTypeSchema() {
-        return v.union([PageTypeSchema, MethodTypeSchema])
+      export function ShapeSchema() {
+        return CircleSchema()
       }
       "
     `)
   });
-  it('generate union types with single element, export as const', async () => {
+  it('generate enum union types', async () => {
     const schema = buildSchema(/* GraphQL */ `
-      type Square {
-        size: Int
-      }
-      type Circle {
-        radius: Int
+      enum PageType {
+        PUBLIC
+        BASIC_AUTH
       }
-      union Shape = Circle | Square
 
-      type Geometry {
-        shape: Shape
+      enum MethodType {
+        GET
+        POST
       }
+
+      union AnyType = PageType | MethodType
     `);
 
     const result = await plugin(
@@ -702,41 +720,23 @@ describe('valibot', () => {
       {
         schema: 'valibot',
         withObjectType: true,
-        validationSchemaExportType: 'const',
       },
       {},
     );
 
     expect(result.content).toMatchInlineSnapshot(`
       "
+      export const PageTypeSchema = v.enum_(PageType);
 
-      export function CircleSchema(): v.GenericSchema<Circle> {
-        return v.object({
-          __typename: v.optional(v.literal('Circle')),
-          radius: v.nullish(v.number())
-        })
-      }
-
-      export function SquareSchema(): v.GenericSchema<Square> {
-        return v.object({
-          __typename: v.optional(v.literal('Square')),
-          size: v.nullish(v.number())
-        })
-      }
-
-      export function ShapeSchema() {
-        return v.union([CircleSchema(), SquareSchema()])
-      }
+      export const MethodTypeSchema = v.enum_(MethodType);
 
-      export function GeometrySchema(): v.GenericSchema<Geometry> {
-        return v.object({
-          __typename: v.optional(v.literal('Geometry')),
-          shape: v.nullish(ShapeSchema())
-        })
+      export function AnyTypeSchema() {
+        return v.union([PageTypeSchema, MethodTypeSchema])
       }
       "
     `)
   });
+  it.todo('generate union types with single element, export as const')
   it('with object arguments', async () => {
     const schema = buildSchema(/* GraphQL */ `
       type MyType {
@@ -778,4 +778,166 @@ describe('valibot', () => {
       "
     `)
   });
+  describe('with InterfaceType', () => {
+    it('not generate if withObjectType false', async () => {
+      const schema = buildSchema(/* GraphQL */ `
+        interface User {
+          id: ID!
+          name: String
+        }
+      `);
+      const result = await plugin(
+        schema,
+        [],
+        {
+          schema: 'valibot',
+          withObjectType: false,
+        },
+        {},
+      );
+      expect(result.content).not.toContain('export function UserSchema(): v.GenericSchema<User>');
+    });
+    it('generate if withObjectType true', async () => {
+      const schema = buildSchema(/* GraphQL */ `
+        interface Book {
+          title: String
+        }
+      `);
+      const result = await plugin(
+        schema,
+        [],
+        {
+          schema: 'valibot',
+          withObjectType: true,
+        },
+        {},
+      );
+      expect(result.content).toMatchInlineSnapshot(`
+        "
+
+        export function BookSchema(): v.GenericSchema<Book> {
+          return v.object({
+            title: v.nullish(v.string())
+          })
+        }
+        "
+      `)
+    });
+    it('generate interface type contains interface type', async () => {
+      const schema = buildSchema(/* GraphQL */ `
+        interface Book {
+          author: Author
+          title: String
+        }
+
+        interface Author {
+          books: [Book]
+          name: String
+        }
+      `);
+      const result = await plugin(
+        schema,
+        [],
+        {
+          schema: 'valibot',
+          withObjectType: true,
+        },
+        {},
+      );
+      expect(result.content).toMatchInlineSnapshot(`
+        "
+
+        export function BookSchema(): v.GenericSchema<Book> {
+          return v.object({
+            author: v.nullish(AuthorSchema()),
+            title: v.nullish(v.string())
+          })
+        }
+
+        export function AuthorSchema(): v.GenericSchema<Author> {
+          return v.object({
+            books: v.nullish(v.array(v.nullable(BookSchema()))),
+            name: v.nullish(v.string())
+          })
+        }
+        "
+      `)
+    });
+    it('generate object type contains interface type', async () => {
+      const schema = buildSchema(/* GraphQL */ `
+        interface Book {
+          title: String!
+          author: Author!
+        }
+
+        type Textbook implements Book {
+          title: String!
+          author: Author!
+          courses: [String!]!
+        }
+
+        type ColoringBook implements Book {
+          title: String!
+          author: Author!
+          colors: [String!]!
+        }
+
+        type Author {
+          books: [Book!]
+          name: String
+        }
+      `);
+      const result = await plugin(
+        schema,
+        [],
+        {
+          schema: 'valibot',
+          withObjectType: true,
+        },
+        {},
+      );
+      expect(result.content).toMatchInlineSnapshot(`
+        "
+
+        export function BookSchema(): v.GenericSchema<Book> {
+          return v.object({
+            title: v.string(),
+            author: AuthorSchema()
+          })
+        }
+
+        export function TextbookSchema(): v.GenericSchema<Textbook> {
+          return v.object({
+            __typename: v.optional(v.literal('Textbook')),
+            title: v.string(),
+            author: AuthorSchema(),
+            courses: v.array(v.string())
+          })
+        }
+
+        export function ColoringBookSchema(): v.GenericSchema<ColoringBook> {
+          return v.object({
+            __typename: v.optional(v.literal('ColoringBook')),
+            title: v.string(),
+            author: AuthorSchema(),
+            colors: v.array(v.string())
+          })
+        }
+
+        export function AuthorSchema(): v.GenericSchema<Author> {
+          return v.object({
+            __typename: v.optional(v.literal('Author')),
+            books: v.nullish(v.array(BookSchema())),
+            name: v.nullish(v.string())
+          })
+        }
+        "
+      `)
+    });
+  })
+  it.todo('properly generates custom directive values')
+  it.todo('exports as const instead of func')
+  it.todo('generate both input & type, export as const')
+  it.todo('issue #394')
+  it.todo('issue #394')
 })