Add support for hono.on(method, path, class) (#208)

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "chanfana",
-	"version": "2.4.1",
+	"version": "2.4.2",
 	"description": "OpenAPI 3 and 3.1 schema generator and validator for Hono, itty-router and more!",
 	"main": "dist/index.js",
 	"module": "dist/index.mjs",

src/adapters/hono.ts

@@ -1,6 +1,12 @@
 import { OpenAPIHandler, type OpenAPIRouterType } from "../openapi";
+import type { OpenAPIRoute } from "../route";
 import type { RouterOptions } from "../types";
 
+export type HonoOpenAPIRouterType<M> = OpenAPIRouterType<M> & {
+  on(method: string, path: string, endpoint: typeof OpenAPIRoute<any>): M;
+  on(method: string, path: string, router: M): M;
+};
+
 export class HonoOpenAPIHandler extends OpenAPIHandler {
   getRequest(args: any[]) {
     return args[0].req.raw;
@@ -11,7 +17,7 @@ export class HonoOpenAPIHandler extends OpenAPIHandler {
   }
 }
 
-export function fromHono<M>(router: M, options?: RouterOptions): M & OpenAPIRouterType<M> {
+export function fromHono<M>(router: M, options?: RouterOptions): M & HonoOpenAPIRouterType<M> {
   const openapiRouter = new HonoOpenAPIHandler(router, options);
 
   return new Proxy(router, {
@@ -35,6 +41,21 @@ export function fromHono<M>(router: M, options?: RouterOptions): M & OpenAPIRout
               path: route,
               handlers: handlers,
             });
+          } else if (prop === "on") {
+            const methods: string | string[] = route;
+            const paths: string | string[] = handlers.shift();
+
+            if (Array.isArray(methods) || Array.isArray(paths)) {
+              throw new Error("chanfana only supports single method+path on hono.on('method', 'path', EndpointClass)");
+            }
+
+            handlers = openapiRouter.registerRoute({
+              method: methods.toLowerCase(),
+              path: paths,
+              handlers: handlers,
+            });
+
+            handlers = [paths, ...handlers];
           }
         }