BookStack/app/Auth/Access/Guards/ExternalBaseSessionGuard.php

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<?php
namespace BookStack\Auth\Access\Guards;
use Illuminate\Auth\GuardHelpers;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\StatefulGuard;
use Illuminate\Contracts\Auth\UserProvider;
use Illuminate\Contracts\Session\Session;
/**
* Class BaseSessionGuard
* A base implementation of a session guard. Is a copy of the default Laravel
* guard with 'remember' functionality removed. Basic auth and event emission
* has also been removed to keep this simple. Designed to be extended by external
* Auth Guards.
*
* @package Illuminate\Auth
*/
class ExternalBaseSessionGuard implements StatefulGuard
{
use GuardHelpers;
/**
* The name of the Guard. Typically "session".
*
* Corresponds to guard name in authentication configuration.
*
* @var string
*/
protected $name;
/**
* The user we last attempted to retrieve.
*
* @var \Illuminate\Contracts\Auth\Authenticatable
*/
protected $lastAttempted;
/**
* The session used by the guard.
*
* @var \Illuminate\Contracts\Session\Session
*/
protected $session;
/**
* Indicates if the logout method has been called.
*
* @var bool
*/
protected $loggedOut = false;
/**
* Create a new authentication guard.
*
* @param string $name
* @param \Illuminate\Contracts\Auth\UserProvider $provider
* @param \Illuminate\Contracts\Session\Session $session
* @return void
*/
public function __construct($name,
UserProvider $provider,
Session $session)
{
$this->name = $name;
$this->session = $session;
$this->provider = $provider;
}
/**
* Get the currently authenticated user.
*
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function user()
{
if ($this->loggedOut) {
return;
}
// If we've already retrieved the user for the current request we can just
// return it back immediately. We do not want to fetch the user data on
// every call to this method because that would be tremendously slow.
if (! is_null($this->user)) {
return $this->user;
}
$id = $this->session->get($this->getName());
// First we will try to load the user using the
// identifier in the session if one exists.
if (! is_null($id)) {
$this->user = $this->provider->retrieveById($id);
}
return $this->user;
}
/**
* Get the ID for the currently authenticated user.
*
* @return int|null
*/
public function id()
{
if ($this->loggedOut) {
return;
}
return $this->user()
? $this->user()->getAuthIdentifier()
: $this->session->get($this->getName());
}
/**
* Log a user into the application without sessions or cookies.
*
* @param array $credentials
* @return bool
*/
public function once(array $credentials = [])
{
if ($this->validate($credentials)) {
$this->setUser($this->lastAttempted);
return true;
}
return false;
}
/**
* Log the given user ID into the application without sessions or cookies.
*
* @param mixed $id
* @return \Illuminate\Contracts\Auth\Authenticatable|false
*/
public function onceUsingId($id)
{
if (! is_null($user = $this->provider->retrieveById($id))) {
$this->setUser($user);
return $user;
}
return false;
}
/**
* Validate a user's credentials.
*
* @param array $credentials
* @return bool
*/
public function validate(array $credentials = [])
{
return false;
}
/**
* Attempt to authenticate a user using the given credentials.
*
* @param array $credentials
* @param bool $remember
* @return bool
*/
public function attempt(array $credentials = [], $remember = false)
{
return false;
}
/**
* Log the given user ID into the application.
*
* @param mixed $id
* @param bool $remember
* @return \Illuminate\Contracts\Auth\Authenticatable|false
*/
public function loginUsingId($id, $remember = false)
{
if (! is_null($user = $this->provider->retrieveById($id))) {
$this->login($user, $remember);
return $user;
}
return false;
}
/**
* Log a user into the application.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param bool $remember
* @return void
*/
public function login(AuthenticatableContract $user, $remember = false)
{
$this->updateSession($user->getAuthIdentifier());
$this->setUser($user);
}
/**
* Update the session with the given ID.
*
* @param string $id
* @return void
*/
protected function updateSession($id)
{
$this->session->put($this->getName(), $id);
$this->session->migrate(true);
}
/**
* Log the user out of the application.
*
* @return void
*/
public function logout()
{
$this->clearUserDataFromStorage();
// Now we will clear the users out of memory so they are no longer available
// as the user is no longer considered as being signed into this
// application and should not be available here.
$this->user = null;
$this->loggedOut = true;
}
/**
* Remove the user data from the session and cookies.
*
* @return void
*/
protected function clearUserDataFromStorage()
{
$this->session->remove($this->getName());
}
/**
* Get the last user we attempted to authenticate.
*
* @return \Illuminate\Contracts\Auth\Authenticatable
*/
public function getLastAttempted()
{
return $this->lastAttempted;
}
/**
* Get a unique identifier for the auth session value.
*
* @return string
*/
public function getName()
{
return 'login_'.$this->name.'_'.sha1(static::class);
}
/**
* Determine if the user was authenticated via "remember me" cookie.
*
* @return bool
*/
public function viaRemember()
{
return false;
}
/**
* Return the currently cached user.
*
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function getUser()
{
return $this->user;
}
/**
* Set the current user.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @return $this
*/
public function setUser(AuthenticatableContract $user)
{
$this->user = $user;
$this->loggedOut = false;
return $this;
}
}