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<?php
namespace Engelsystem\Helpers;
use Carbon\Carbon;
use Engelsystem\Models\User\User;
use Engelsystem\Models\User\User as UserRepository;
use Psr\Http\Message\ServerRequestInterface;
use Symfony\Component\HttpFoundation\Session\Session;
class Authenticator
{
/** @var User */
protected $user = null;
/** @var ServerRequestInterface */
protected $request;
/** @var Session */
protected $session;
/** @var UserRepository */
protected $userRepository;
/** @var string[] */
protected $permissions;
/** @var int */
protected $passwordAlgorithm = PASSWORD_DEFAULT;
/**
* @param ServerRequestInterface $request
* @param Session $session
* @param UserRepository $userRepository
*/
public function __construct(ServerRequestInterface $request, Session $session, UserRepository $userRepository)
{
$this->request = $request;
$this->session = $session;
$this->userRepository = $userRepository;
}
/**
* Load the user from session
*
* @return User|null
*/
public function user()
{
if ($this->user) {
return $this->user;
}
$userId = $this->session->get('user_id');
if (!$userId) {
return null;
}
$user = $this
->userRepository
->find($userId);
if (!$user) {
return null;
}
$this->user = $user;
return $this->user;
}
/**
* Get the user by his api key
*
* @param string $parameter
* @return User|null
*/
public function apiUser($parameter = 'api_key')
{
if ($this->user) {
return $this->user;
}
$params = $this->request->getQueryParams();
if (!isset($params[$parameter])) {
return null;
}
$user = $this
->userRepository
->whereApiKey($params[$parameter])
->first();
if (!$user) {
return $this->user();
}
$this->user = $user;
return $this->user;
}
/**
* @param string[]|string $abilities
* @return bool
*/
public function can($abilities): bool
{
$abilities = (array)$abilities;
if (empty($this->permissions)) {
$user = $this->user();
if ($user) {
$this->permissions = $this->getPermissionsByUser($user);
$user->last_login_at = new Carbon();
$user->save();
} elseif ($this->session->get('user_id')) {
$this->session->remove('user_id');
}
if (empty($this->permissions)) {
$this->permissions = $this->getPermissionsByGroup(-10);
}
}
foreach ($abilities as $ability) {
if (!in_array($ability, $this->permissions)) {
return false;
}
}
return true;
}
/**
* @param string $login
* @param string $password
* @return User|null
*/
public function authenticate(string $login, string $password)
{
/** @var User $user */
$user = $this->userRepository->whereName($login)->first();
if (!$user) {
$user = $this->userRepository->whereEmail($login)->first();
}
if (!$user) {
return null;
}
if (!$this->verifyPassword($user, $password)) {
return null;
}
return $user;
}
/**
* @param User $user
* @param string $password
* @return bool
*/
public function verifyPassword(User $user, string $password)
{
$algorithm = $this->passwordAlgorithm;
if (!password_verify($password, $user->password)) {
return false;
}
if (password_needs_rehash($user->password, $algorithm)) {
$this->setPassword($user, $password);
}
return true;
}
/**
* @param UserRepository $user
* @param string $password
*/
public function setPassword(User $user, string $password)
{
$algorithm = $this->passwordAlgorithm;
$user->password = password_hash($password, $algorithm);
$user->save();
}
/**
* @return int
*/
public function getPasswordAlgorithm()
{
return $this->passwordAlgorithm;
}
/**
* @param int $passwordAlgorithm
*/
public function setPasswordAlgorithm(int $passwordAlgorithm)
{
$this->passwordAlgorithm = $passwordAlgorithm;
}
/**
* @param User $user
* @return array
* @codeCoverageIgnore
*/
protected function getPermissionsByUser($user)
{
return privileges_for_user($user->id);
}
/**
* @param int $groupId
* @return array
* @codeCoverageIgnore
*/
protected function getPermissionsByGroup(int $groupId)
{
return privileges_for_group($groupId);
}
}
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