register/marko_unpacked/marko/portal/services/Auth.php

<?php

namespace app\services;

use app\models\UserPublic;

class Auth
{

    /**
     * @return \app\models\UserPublic|null
     */
    public static function getUser()
    {
        if (isset($_SESSION['public_user']))
            return UserPublic::find()->where(['email' => $_SESSION['public_user']])->one();
        return null;
    }

    public static function checkUserExists($user)
    {
        $exists = UserPublic::find()->where(['email' => $user])->one();

        if (!$exists) {
            header('Location: ' . \Yii::$app->params['portal']);
            exit;
        }
    }

    public static function setUser($username = null)
    {
        if ($username) {
            $_SESSION['public_user'] = $username;
        } else {
            if (!empty($_SESSION['public_user'])) {
                unset($_SESSION['public_user']);
            }
        }
    }

    public static function getUserByToken($get_token = null)
    {
        if ($get_token) {
            $token = $get_token;
        } else {
            $headers = getallheaders();
            $token = !empty($headers['Auth']) && $headers['Auth'] != 'undefined' ? $headers['Auth'] : null;
        }
        if ($token) {
            $decode = JWT::decode($token, JWT::SECRET_KEY);
            if ($decode->id) {
                return UserPublic::findOne($decode->id);
            }
        }
        return null;
    }
}