pkp/pkp-lib#9434 added exmaple of injecting a closure based route

ApiExamplePlugin.php

@@ -20,10 +20,14 @@
 namespace APP\plugins\generic\apiExample;
 
 use APP\plugins\generic\apiExample\api\v1\users\PKPOverriddenUserController;
+use Illuminate\Http\Request as IlluminateRequest;
+use Illuminate\Http\Response;
+use Illuminate\Http\JsonResponse;
 use PKP\core\PKPBaseController;
 use PKP\handler\APIHandler;
 use PKP\plugins\GenericPlugin;
 use PKP\plugins\Hook;
+use PKP\security\Role;
 
 class ApiExamplePlugin extends GenericPlugin
 {
@@ -61,7 +65,29 @@ public function register($category, $path, $mainContextId = null)
     public function addRoute(): void
     {
         Hook::add('APIHandler::endpoints::users', function(string $hookName, PKPBaseController &$apiController, APIHandler $apiHandler): bool {
-
+
+            // This allow to add a route on fly without defining a api controller
+            // Through this allow quick add/modify routes, it's better to use
+            // controller based appraoch which is more structured and understandable
+            $apiHandler->addRoute(
+                'GET',
+                'testing/routes/add/onfly',
+                function (IlluminateRequest $request): JsonResponse {
+                    return response()->json([
+                        'message' => 'A new route added successfully on fly',
+                    ], Response::HTTP_OK);
+                },
+                'test.onfly',
+                [
+                    Role::ROLE_ID_SITE_ADMIN,
+                    Role::ROLE_ID_MANAGER,
+                    Role::ROLE_ID_SUB_EDITOR,
+                ]
+            );
+
+            // This allow to update the api controller directly with an overrided controller 
+            // that extends a core controller where one or more routes can be added or 
+            // multiple existing routes can be modified
             $apiController = new PKPOverriddenUserController();
 
             return false;

README.md

@@ -49,6 +49,29 @@ Hook::add('APIHandler::endpoints::users', function(string $hookName, PKPBaseCont
 });
 ```
 
+Another way to add or override api routes to an existing entity is to use the closure based appraoch to add a route directly in the route collection. 
+
+```php
+Hook::add('APIHandler::endpoints::users', function(string $hookName, PKPBaseController &$apiController, APIHandler $apiHandler): bool {
+
+    $apiHandler->addRoute(
+        'GET/POST/PUT/PATCH/DELETE', // HTTP Request METHOD
+        'some/route/path/to/add',   // The route uri
+        function (IlluminateRequest $request): JsonResponse { // The closure/callback of route action handler when the route url got hit
+            return response()->json([
+                'message' => 'A new route added successfully',
+            ], Response::HTTP_OK);
+        },
+        'name.of.the.route', // Name of the route
+        [Role::ROLE_ID_..., Role::ROLE_ID_..., ...] // The route accessable role from `Role::ROLE_ID_*`
+    );
+
+    return false;
+});
+```
+
+> NOTE : Above approach to inject route dynamically through the `APIHandler::addRoute` should be used for simple route implementation that handle very simple and limited action logic. For broad and complex route action, better to use the controller based approach.
+
 Also see the same implementation in [Plugin Code](https://github.com/touhidurabir/apiExample/blob/main/api/v1/users/PKPOverriddenUserController.php) .
 
 

api/v1/tests/PluginTestController.php

@@ -76,6 +76,16 @@ public function authorize(PKPRequest $request, array &$args, array $roleAssignme
     /**
      * A simple plugin level api endpoint can be access as 
      * http://BASE_URL/index.php/CONTEXT_PATH/plugins/generic/apiExample/api/v1/tests
+     * 
+     * To generate the API URL of a plugin : 
+     * 
+     *  Application::get()->getRequest()->getRouter()->url(
+     *      request: Application::get()->getRequest(),
+     *      newContext: Application::get()->getRequest()->getContext()?->getPath(),
+     *      endpoint: 'tests',
+     *      pluginOptions: ['generic', 'apiExample']
+     *  )
+     * 
      */
     public function get(Request $request): JsonResponse
     {