RouteManager.php

<?php
namespace Space;

class RouteManager {
    public function __construct() {
        $app = \Slim\Slim::getInstance();
        
        $app->get('/', function () {
            print "hi";
        });
        
        //user stuff
        $app->get('/user', \Space\Controllers\UserController::listMethods());
        $app->get('/user/:id', \Space\Controllers\UserController::getUser());
        $app->post('/user', \Space\Controllers\UserController::createUser());
        $app->put('/user/:id', \Space\Controllers\UserController::updateUser());
        $app->delete('/user/:id', \Space\Controllers\UserController::deleteUser());
    }
}

UserController.php

<?php
namespace Space\Controllers;

use \Space\Models\UserModel as User;

class UserController {   
    public static function getUser() {
        return function ($id) {
            $app = \Slim\Slim::getInstance();
            $user = User::find($id);
            if (!is_null($user) && $user instanceof User) {
                $app->response->setStatus(200);
                print $user->toJson();
            } else {
                $app->response->setStatus(404);
                $app->response->setBody("Not Found");
            }
        };
    }
    
    public static function createUser() {
        return function () {
            $app = \Slim\Slim::getInstance();
            $attr = $app->request->post();
            try {
                $user = new User($attr);
                $user->save();
                $app->response->setStatus(201);
                print $user->toJson();
            } catch (Exception $e) {
                $app->response->setStatus(404);
            }
        };
    }    
    
    public static function updateUser() {
        return function ($id) {
            $app = \Slim\Slim::getInstance();
            
            $attr = $app->request->post();
            try {
                $user = User::find($id);
                if ($user instanceof User) {
                    $user->update($attr);
                    $user->save();
                    $app->response->setStatus(204);
                } else {
                    $app->response->setStatus(404);
                }
            } catch (Exception $e) {
                $app->response->setStatus(400);
            }
        };
    } 
    
    public static function deleteUser() {
        return function ($id) {
            //Not supported
            $app->response->setStatus(403);
        };
    }
    
    public static function listMethods() {
        return function ($id) {

        };
    }    
    
}