fix: handle tree-shakeable angular client case

.changeset/ninety-windows-accept.md

@@ -0,0 +1,5 @@
+---
+'@hey-api/openapi-ts': patch
+---
+
+fix: handle tree-shakeable angular client case

packages/openapi-ts/src/compiler/index.ts

@@ -168,6 +168,7 @@ export class TypeScriptFile {
 }
 
 export const compiler = {
+  anonymousFunction: types.createAnonymousFunction,
   arrayLiteralExpression: types.createArrayLiteralExpression,
   arrowFunction: types.createArrowFunction,
   awaitExpression: types.createAwaitExpression,

packages/openapi-ts/src/compiler/types.ts

@@ -298,6 +298,44 @@ export const createArrowFunction = ({
   return expression;
 };
 
+/**
+ * Create anonymous function type expression.
+ */
+export const createAnonymousFunction = ({
+  async,
+  comment,
+  multiLine,
+  parameters = [],
+  returnType,
+  statements = [],
+  types = [],
+}: {
+  async?: boolean;
+  comment?: Comments;
+  multiLine?: boolean;
+  parameters?: FunctionParameter[];
+  returnType?: string | ts.TypeNode;
+  statements?: ts.Statement[];
+  types?: FunctionTypeParameter[];
+}) => {
+  const expression = ts.factory.createFunctionExpression(
+    async ? [ts.factory.createModifier(ts.SyntaxKind.AsyncKeyword)] : undefined,
+    undefined,
+    undefined,
+    types ? toTypeParameters(types) : undefined,
+    toParameterDeclarations(parameters),
+    returnType ? createTypeNode(returnType) : undefined,
+    ts.factory.createBlock(statements, multiLine),
+  );
+
+  addLeadingComments({
+    comments: comment,
+    node: expression,
+  });
+
+  return expression;
+};
+
 /**
  * Create Array type expression.
  * @param arr - The array to create.

packages/openapi-ts/src/generate/services.ts

@@ -610,7 +610,7 @@ const processService = ({
 
   if (!config.services.asClass && !config.name) {
     for (const operation of service.operations) {
-      const expression = compiler.arrowFunction({
+      const compileFunctionParams = {
         parameters: toOperationParamType(client, operation),
         returnType: isStandalone
           ? undefined
@@ -622,7 +622,11 @@ const processService = ({
           onClientImport,
         ),
         types: isStandalone ? [throwOnErrorTypeGeneric] : undefined,
-      });
+      };
+      const expression =
+        config.client.name === 'angular'
+          ? compiler.anonymousFunction(compileFunctionParams)
+          : compiler.arrowFunction(compileFunctionParams);
       const statement = compiler.constVariable({
         comment: toOperationComment(operation),
         exportConst: true,

packages/openapi-ts/test/__snapshots__/test/generated/v3_angular_tree_shakeable/core/ApiError.ts.snap

@@ -0,0 +1,21 @@
+import type { ApiRequestOptions } from './ApiRequestOptions';
+import type { ApiResult } from './ApiResult';
+
+export class ApiError extends Error {
+	public readonly url: string;
+	public readonly status: number;
+	public readonly statusText: string;
+	public readonly body: unknown;
+	public readonly request: ApiRequestOptions;
+
+	constructor(request: ApiRequestOptions, response: ApiResult, message: string) {
+		super(message);
+
+		this.name = 'ApiError';
+		this.url = response.url;
+		this.status = response.status;
+		this.statusText = response.statusText;
+		this.body = response.body;
+		this.request = request;
+	}
+}

packages/openapi-ts/test/__snapshots__/test/generated/v3_angular_tree_shakeable/core/ApiRequestOptions.ts.snap

@@ -0,0 +1,21 @@
+export type ApiRequestOptions<T = unknown> = {
+	readonly body?: any;
+	readonly cookies?: Record<string, unknown>;
+	readonly errors?: Record<number | string, string>;
+	readonly formData?: Record<string, unknown> | any[] | Blob | File;
+	readonly headers?: Record<string, unknown>;
+	readonly mediaType?: string;
+	readonly method:
+		| 'DELETE'
+		| 'GET'
+		| 'HEAD'
+		| 'OPTIONS'
+		| 'PATCH'
+		| 'POST'
+		| 'PUT';
+	readonly path?: Record<string, unknown>;
+	readonly query?: Record<string, unknown>;
+	readonly responseHeader?: string;
+	readonly responseTransformer?: (data: unknown) => Promise<T>;
+	readonly url: string;
+};

packages/openapi-ts/test/__snapshots__/test/generated/v3_angular_tree_shakeable/core/ApiResult.ts.snap

@@ -0,0 +1,7 @@
+export type ApiResult<TData = any> = {
+	readonly body: TData;
+	readonly ok: boolean;
+	readonly status: number;
+	readonly statusText: string;
+	readonly url: string;
+};

packages/openapi-ts/test/__snapshots__/test/generated/v3_angular_tree_shakeable/core/OpenAPI.ts.snap

@@ -0,0 +1,55 @@
+import type { HttpResponse } from '@angular/common/http';
+import type { ApiRequestOptions } from './ApiRequestOptions';
+
+type Headers = Record<string, string>;
+type Middleware<T> = (value: T) => T | Promise<T>;
+type Resolver<T> = (options: ApiRequestOptions<T>) => Promise<T>;
+
+export class Interceptors<T> {
+  _fns: Middleware<T>[];
+
+  constructor() {
+    this._fns = [];
+  }
+
+  eject(fn: Middleware<T>): void {
+    const index = this._fns.indexOf(fn);
+    if (index !== -1) {
+      this._fns = [...this._fns.slice(0, index), ...this._fns.slice(index + 1)];
+    }
+  }
+
+  use(fn: Middleware<T>): void {
+    this._fns = [...this._fns, fn];
+  }
+}
+
+export type OpenAPIConfig = {
+	BASE: string;
+	CREDENTIALS: 'include' | 'omit' | 'same-origin';
+	ENCODE_PATH?: ((path: string) => string) | undefined;
+	HEADERS?: Headers | Resolver<Headers> | undefined;
+	PASSWORD?: string | Resolver<string> | undefined;
+	TOKEN?: string | Resolver<string> | undefined;
+	USERNAME?: string | Resolver<string> | undefined;
+	VERSION: string;
+	WITH_CREDENTIALS: boolean;
+	interceptors: {
+		response: Interceptors<HttpResponse<any>>;
+	};
+};
+
+export const OpenAPI: OpenAPIConfig = {
+	BASE: 'http://localhost:3000/base',
+	CREDENTIALS: 'include',
+	ENCODE_PATH: undefined,
+	HEADERS: undefined,
+	PASSWORD: undefined,
+	TOKEN: undefined,
+	USERNAME: undefined,
+	VERSION: '1.0',
+	WITH_CREDENTIALS: false,
+	interceptors: {
+		response: new Interceptors(),
+	},
+};