slim 3 pass additional param to controller - php

Question

This is my original code:
$app->post('/api/user', function (Request $request, Response $response, array $args) use ($tokenAuth) {
$tokenAuth->parseHeaders(); // validate token
//...do stuff with $tokenAuth data
$response->getBody()->write(json_encode(...)));
return $response;
});
Notice the use ($tokenAuth) this allows me to use this object within the method.
How can I use this method below in the same manner?
$app->post('/api/user', \UserController::class . ':add');
which works fine when the route hits in the class UserController:
class UserController {
public function add($request, $response, $args) { ...}
}
How can I pass $tokenAuth to this?

Answer 1

You can register $tokenAuth and UserController to dependency manager and pass $tokenAuth to UserController via dependency injection merchanism. For example:
<?php
namespace Your\Own\NameSpace;
use Your\Own\NameSpace\TokenAuth;
class UserController
{
private $tokenAuth;
public function __construct(TokenAuth $tokenAuth)
{
$this->tokenAuth = $tokenAuth;
}
public function add($request, $response, $args)
{
$this->tokenAuth->parseHeaders();
...
}
}
In your dependency registration code (assuming using Pimple):
<?php
use Your\Own\NameSpace\TokenAuth;
use Your\Own\NameSpace\UserController;
$container[TokenAuth::class] = function ($c) {
return new TokenAuth();
};
$container[UserController::class] = function ($c) {
$tokenAuth = $c->get(TokenAuth::class);
return new UserController($tokenAuth);
};

Answer 2

I ended up using middleware to authenticate on the route:
$mw = function($request, $response, $next){
$tokenAuth = new \TokenAuth();
$tokenAuth->parseHeaders();
$response = $next($request, $response);
return $response;
};
$app = new \Slim\App();
$app->post('/api/user', \UserController::class . ':add')->add($mw);
$app->run();

Answer 3

Take a look at your original code, you can use $tokenAuth (and it works), it means that you defined it globally before.
So, in your add method, just declare it as a global variable: global $tokenAuth; then use it;
public function add($request, $response, $args) {
global $tokenAuth;
$tokenAuth->parseHeaders();
...
}