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Remove instanceOf checks #90

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merged 1 commit into from
Feb 20, 2024
Merged

Remove instanceOf checks #90

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28 changes: 21 additions & 7 deletions src/transformer.ts
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import type { FastifyDynamicSwaggerOptions } from '@fastify/swagger';
import type { FastifySchema } from 'fastify';
import type { OpenAPIV3 } from 'openapi-types';
import { type AnyZodObject, ZodObject, type ZodRawShape, ZodType } from 'zod';
import type { AnyZodObject, ZodObject, ZodRawShape, ZodType } from 'zod';
import { api } from 'zod-openapi';
import type {
ZodOpenApiComponentsObject,
Expand Down Expand Up @@ -36,6 +36,20 @@ export type FastifyZodOpenApiSchema = Omit<
params?: AnyZodObject;
};

export const isZodType = (object: unknown): object is ZodType =>
Boolean(
object &&
// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
Object.getPrototypeOf((object as ZodType)?.constructor)?.name ===
'ZodType',
);

export const isZodObject = (
object: unknown,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
): object is ZodObject<any, any, any, any, any> =>
Boolean(object && (object as ZodType)?.constructor?.name === 'ZodObject');

export const createParams = (
// eslint-disable-next-line @typescript-eslint/no-explicit-any
querystring: ZodObject<any, any, any, any, any>,
Expand Down Expand Up @@ -72,7 +86,7 @@ export const createResponseSchema = (
components: api.ComponentsObject,
path: string[],
): unknown => {
if (schema.properties instanceof ZodType) {
if (isZodType(schema.properties)) {
return api.createMediaTypeSchema(schema.properties, components, 'output', [
...path,
'schema',
Expand Down Expand Up @@ -122,7 +136,7 @@ export const createResponse = (

return Object.entries(response).reduce(
(acc, [key, value]: [string, unknown]) => {
if (value instanceof ZodType) {
if (isZodType(value)) {
acc[key] = api.createMediaTypeSchema(value, components, 'output', [
...path,
key,
Expand Down Expand Up @@ -177,7 +191,7 @@ export const fastifyZodOpenApiTransform: Transform = ({
...schema,
};

if (body instanceof ZodType) {
if (isZodType(body)) {
transformedSchema.body = api.createMediaTypeSchema(
body,
components,
Expand All @@ -190,7 +204,7 @@ export const fastifyZodOpenApiTransform: Transform = ({
transformedSchema.response = maybeResponse;
}

if (querystring instanceof ZodObject) {
if (isZodObject(querystring)) {
transformedSchema.querystring = createParams(
querystring,
'query',
Expand All @@ -199,14 +213,14 @@ export const fastifyZodOpenApiTransform: Transform = ({
);
}

if (params instanceof ZodObject) {
if (isZodObject(params)) {
transformedSchema.params = createParams(params, 'path', components, [
url,
'params',
]);
}

if (headers instanceof ZodObject) {
if (isZodObject(headers)) {
transformedSchema.headers = createParams(headers, 'header', components, [
url,
'headers',
Expand Down
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