feat: update codegen api and types (#17)

BREAKING_CHANGE: rewrite api name

Author: Himenon

README.md

@@ -20,6 +20,8 @@ yarn add -D @himenon/openapi-typescript-code-generator
 ### DEMO
 
 - [DEMO](./example/README.md)
+- [DEMO: github/rest-api-client code generate](https://github.com/Himenon/github-rest-api-client/tree/master/source)
+  - https://github.com/github/rest-api-description
 
 ### Basic usage
 
@@ -41,7 +43,7 @@ main();
 
 ### Create the original API Client template.
 
-We have an entry point in `option.makeApiClient` to generate non-typed code.
+We have an entry point in `option.rewriteCodeAfterTypeDeclaration` to generate non-typed code.
 The first argument can be TypeScript's `TransformationContext`, and the second argument contains the information of the type definition generated before this.
 By using [ts-ast-viewer](https://ts-ast-viewer.com), code extension by AST can facilitate code extension.
 
@@ -56,7 +58,7 @@ const main = () => {
   const params: CodeGenerator.Params = {
     entryPoint: "your/openapi/spec.yml", // support .yml, .yaml, .json
     option: {
-      makeApiClient: (context: ts.TransformationContext, codeGeneratorParamsList: CodeGenerator.Converter.v3.CodeGeneratorParams[]): ts.Statement[] => {
+      rewriteCodeAfterTypeDeclaration: (context: ts.TransformationContext, codeGeneratorParamsList: CodeGenerator.Converter.v3.CodeGeneratorParams[]): ts.Statement[] => {
         const factory = context.factory; // https://ts-ast-viewer.com/ is very very very useful !
         return []; // generate no api client
       },

docs/ja/README-ja.md

@@ -39,7 +39,7 @@ main();
 
 ### オリジナルの API Client テンプレートを作成する
 
-`option.makeApiClient`に型定義以外のコードを生成するためのエントリーポイントを用意しています。
+`option.rewriteCodeAfterTypeDeclaration`に型定義以外のコードを生成するためのエントリーポイントを用意しています。
 第 1 引数は TypeScript の`TransformationContext`が利用でき、第 2 引数はこれ以前に生成した型定義の情報が含まれます。
 [ts-ast-viewer](https://ts-ast-viewer.com)を利用することにより AST によるコード拡張がコード拡張を円滑にでます。
 
@@ -54,7 +54,7 @@ const main = () => {
   const params: CodeGenerator.Params = {
     entryPoint: "your/openapi/spec.yml", // support .yml, .yaml, .json
     option: {
-      makeApiClient: (context: ts.TransformationContext, codeGeneratorParamsList: CodeGenerator.Converter.v3.CodeGeneratorParams[]): ts.Statement[] => {
+      rewriteCodeAfterTypeDeclaration: (context: ts.TransformationContext, codeGeneratorParamsList: CodeGenerator.Converter.v3.CodeGeneratorParams[]): ts.Statement[] => {
         const factory = context.factory; // https://ts-ast-viewer.com/ is very very very useful !
         return []; // generate no api client
       },

example/client.ts

@@ -1,5 +1,5 @@
 //
-// Generated by @himenon/openapi-typescript-code-generator v0.0.0
+// Generated by @himenon/openapi-typescript-code-generator v0.2.0
 //
 // OpenApi : 3.0.3
 //
@@ -68,15 +68,16 @@ export interface QueryParameter {
 export interface QueryParameters {
   [key: string]: QueryParameter;
 }
+export type SuccessResponses = Response$getBooks$Status$200 | Response$searchBooks$Status$200;
 export interface ApiClient<RequestOption> {
-  request: (
+  request: <T = SuccessResponses>(
     httpMethod: HttpMethod,
     url: string,
     headers: ObjectLike | any,
     requestBody: ObjectLike | any,
     queryParameters: QueryParameters | undefined,
     options?: RequestOption,
-  ) => Promise<any>;
+  ) => Promise<T>;
 }
 export class Client<RequestOption> {
   constructor(private apiClient: ApiClient<RequestOption>, private baseUrl: string) {}

src/CodeGenerator/factory/CallExpression.ts

@@ -2,6 +2,7 @@ import ts from "typescript";
 
 export interface Params$Create {
   expression: ts.Expression;
+  typeArguments?: readonly ts.TypeNode[] | undefined;
   argumentsArray: readonly ts.Expression[];
 }
 
@@ -10,7 +11,7 @@ export interface Factory {
 }
 
 export const create = ({ factory }: ts.TransformationContext): Factory["create"] => (params: Params$Create): ts.CallExpression => {
-  const node = factory.createCallExpression(params.expression, undefined, params.argumentsArray);
+  const node = factory.createCallExpression(params.expression, params.typeArguments, params.argumentsArray);
   return node;
 };
 

src/CodeGenerator/factory/TypeParameterDeclaration.ts

@@ -3,14 +3,15 @@ import ts from "typescript";
 export interface Params$Create {
   name: string;
   constraint?: ts.TypeNode;
+  defaultType?: ts.TypeNode;
 }
 
 export interface Factory {
   create: (params: Params$Create) => ts.TypeParameterDeclaration;
 }
 
 export const create = ({ factory }: ts.TransformationContext): Factory["create"] => (params: Params$Create): ts.TypeParameterDeclaration => {
-  const node = factory.createTypeParameterDeclaration(factory.createIdentifier(params.name), params.constraint, undefined);
+  const node = factory.createTypeParameterDeclaration(factory.createIdentifier(params.name), params.constraint, params.defaultType);
   return node;
 };
 

src/Converter/v3/Generator.ts

@@ -103,14 +103,17 @@ const generateCodeGeneratorParamsList = (store: Store.Type, converterContext: Co
   return params;
 };
 
-export type MakeApiClientFunction = (context: ts.TransformationContext, codeGeneratorParamsList: CodeGeneratorParams[]) => ts.Statement[];
+export type RewriteCodeAfterTypeDeclaration = (
+  context: ts.TransformationContext,
+  codeGeneratorParamsList: CodeGeneratorParams[],
+) => ts.Statement[];
 
 export const generateApiClientCode = (
   store: Store.Type,
   context: ts.TransformationContext,
   converterContext: ConverterContext.Types,
-  makeApiClient: MakeApiClientFunction,
+  rewriteCodeAfterTypeDeclaration: RewriteCodeAfterTypeDeclaration,
 ): void => {
   const codeGeneratorParamsList = generateCodeGeneratorParamsList(store, converterContext);
-  store.addAdditionalStatement(makeApiClient(context, codeGeneratorParamsList));
+  store.addAdditionalStatement(rewriteCodeAfterTypeDeclaration(context, codeGeneratorParamsList));
 };

src/Converter/v3/index.ts

@@ -24,7 +24,10 @@ export interface Type {
 }
 
 export interface Option {
-  makeApiClient: Generator.MakeApiClientFunction;
+  /**
+   * It is possible to rewrite the implementation after the type declaration.
+   */
+  rewriteCodeAfterTypeDeclaration: Generator.RewriteCodeAfterTypeDeclaration;
 }
 
 export const create = (entryPoint: string, rootSchema: OpenApi.Document, noReferenceOpenApiSchema: OpenApi.Document, option: Option): Type => {
@@ -94,7 +97,7 @@ export const create = (entryPoint: string, rootSchema: OpenApi.Document, noRefer
     }
     if (rootSchema.paths) {
       Paths.generateStatements(entryPoint, currentPoint, store, factory, rootSchema.paths, toTypeNodeContext, converterContext);
-      Generator.generateApiClientCode(store, context, converterContext, option.makeApiClient);
+      Generator.generateApiClientCode(store, context, converterContext, option.rewriteCodeAfterTypeDeclaration);
     }
     return store.getRootStatements();
   };

src/DefaultCodeTemplate/ApiClientClass/ApiClientInterface.ts

@@ -1,9 +1,31 @@
 import ts from "typescript";
 
 import { Factory } from "../../CodeGenerator";
+import { CodeGeneratorParams } from "../../Converter/v3";
 
 const httpMethodList: string[] = ["GET", "PUT", "POST", "DELETE", "OPTIONS", "HEAD", "PATCH", "TRACE"];
 
+const createSuccessResponseTypeAlias = (typeName: string, factory: Factory.Type, successResponseNames: string[]) => {
+  if (successResponseNames.length === 0) {
+    return factory.TypeAliasDeclaration.create({
+      export: true,
+      name: typeName,
+      type: ts.factory.createToken(ts.SyntaxKind.VoidKeyword),
+    });
+  }
+  return factory.TypeAliasDeclaration.create({
+    export: true,
+    name: typeName,
+    type: factory.UnionTypeNode.create({
+      typeNodes: successResponseNames.map(name => {
+        return factory.TypeReferenceNode.create({
+          name,
+        });
+      }),
+    }),
+  });
+};
+
 const createHttpMethod = (factory: Factory.Type) => {
   return factory.TypeAliasDeclaration.create({
     export: true,
@@ -61,7 +83,7 @@ const createObjectLikeInterface = (factory: Factory.Type) => {
   });
 };
 
-export const create = (factory: Factory.Type): ts.Statement[] => {
+export const create = (factory: Factory.Type, list: CodeGeneratorParams[]): ts.Statement[] => {
   const objectLikeOrAnyType = factory.UnionTypeNode.create({
     typeNodes: [
       factory.TypeReferenceNode.create({
@@ -110,12 +132,25 @@ export const create = (factory: Factory.Type): ts.Statement[] => {
     }),
   });
 
+  const successResponseNames = list.map(item => item.responseSuccessNames).flat();
+
   const functionType = factory.FunctionTypeNode.create({
-    typeParameters: undefined,
+    typeParameters: [
+      factory.TypeParameterDeclaration.create({
+        name: "T",
+        defaultType: factory.TypeReferenceNode.create({
+          name: "SuccessResponses",
+        }),
+      }),
+    ],
     parameters: [httpMethod, url, headers, requestBody, queryParameters, options],
     type: factory.TypeReferenceNode.create({
       name: "Promise",
-      typeArguments: [factory.TypeNode.create({ type: "any" })],
+      typeArguments: [
+        factory.TypeReferenceNode.create({
+          name: "T",
+        }),
+      ],
     }),
   });
 
@@ -129,6 +164,7 @@ export const create = (factory: Factory.Type): ts.Statement[] => {
     createHttpMethod(factory),
     createObjectLikeInterface(factory),
     ...createQueryParamsDeclarations(factory),
+    createSuccessResponseTypeAlias("SuccessResponses", factory, successResponseNames),
     factory.InterfaceDeclaration.create({
       export: true,
       name: "ApiClient",

src/DefaultCodeTemplate/ApiClientClass/Method.ts

@@ -46,7 +46,7 @@ const generateResponseReturnType = (factory: Factory.Type, successResponseNameLi
     });
   }
 
-  // レスすポンスが存在しないので Promise<void>
+  // レスポンスが存在しないので Promise<void>
   if (successResponseNameList.length === 0) {
     return factory.TypeReferenceNode.create({
       name: "Promise",

src/DefaultCodeTemplate/ApiClientClass/MethodBody/CallRequest.ts

@@ -25,6 +25,7 @@ export const create = (factory: Factory.Type, params: CodeGeneratorParams): ts.C
 
   return factory.CallExpression.create({
     expression: expression,
+    typeArguments: [],
     argumentsArray: argumentsArray,
   });
 };