PHP-MVC/framework/helpers.php

<?php

use Framework\App;
use Framework\Validation;
use Framework\View;

if (!function_exists('app')) {
    function app(string $alias = null): mixed
    {
        if (is_null($alias)) {
            return App::getInstance();
        }

        return App::getInstance()->resolve($alias);
    }
}

if (!function_exists('view')) {
    function view(string $template, array $data = []): View\View
    {
        return app('view')->render($template, $data);
    }
}

if (!function_exists('validate')) {
    function validate(array $data, array $rules, string $sessionName = 'errors')
    {
        return app('validator')->validate($data, $rules, $sessionName);
    }
}

if (!function_exists('response')) {
    function response()
    {
        return app('response');
    }
}

if (!function_exists('redirect')) {
    function redirect(string $url)
    {
        return response()->redirect($url);
    }
}

if (!function_exists('csrf')) {
    function csrf()
    {
        $session = session();

        if (!$session) {
            throw new Exception('Session is not enabled');
        }

        $session->put('token', $token = bin2hex(random_bytes(32)));

        return $token;
    }
}

if (!function_exists('secure')) {
    function secure()
    {
        $session = session();

        if (!$session) {
            throw new Exception('Session is not enabled');
        }

        if (!isset($_POST['csrf']) || !$session->has('token') ||  !hash_equals($session->get('token'), $_POST['csrf'])) {
            throw new Exception('CSRF token mismatch');
        }
    }
}

if (!function_exists('dd')) {
    function dd(...$params)
    {
        var_dump(...$params);
        die;
    }
}

if (!function_exists('basePath')) {
    function basePath(string $newBasePath = null): ?string
    {
        return app('paths.base');
    }
}

if (!function_exists('env')) {
    function env(string $key, mixed $default = null): mixed
    {
        if (isset($_SERVER[$key])) {
            return $_SERVER[$key];
        }

        if (isset($_ENV[$key])) {
            return $_ENV[$key];
        }

        $value = getenv($key);

        if ($value !== false) {
            return $value;
        }

        return $default;
    }
}

if (!function_exists('config')) {
    function config(string $key = null, mixed $default = null): mixed
    {
        if (is_null($key)) {
            return app('config');
        }

        return app('config')->get($key, $default);
    }
}

if (!function_exists('session')) {
    function session(string $key = null, mixed $default = null): mixed
    {
        if (is_null($key)) {
            return app('session');
        }

        return app('session')->get($key, $default);
    }
}