BookStack/app/Auth/Access/SocialAuthService.php

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<?php namespace BookStack\Auth\Access;
use BookStack\Auth\SocialAccount;
use BookStack\Auth\UserRepo;
use BookStack\Exceptions\SocialDriverNotConfigured;
use BookStack\Exceptions\SocialSignInAccountNotUsed;
use BookStack\Exceptions\UserRegistrationException;
use Laravel\Socialite\Contracts\Factory as Socialite;
use Laravel\Socialite\Contracts\User as SocialUser;
class SocialAuthService
{
protected $userRepo;
protected $socialite;
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protected $socialAccount;
protected $validSocialDrivers = ['google', 'github', 'facebook', 'slack', 'twitter', 'azure', 'okta', 'gitlab', 'twitch', 'discord'];
/**
* SocialAuthService constructor.
* @param \BookStack\Auth\UserRepo $userRepo
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* @param Socialite $socialite
* @param SocialAccount $socialAccount
*/
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public function __construct(UserRepo $userRepo, Socialite $socialite, SocialAccount $socialAccount)
{
$this->userRepo = $userRepo;
$this->socialite = $socialite;
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$this->socialAccount = $socialAccount;
}
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/**
* Start the social login path.
* @param string $socialDriver
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* @return \Symfony\Component\HttpFoundation\RedirectResponse
* @throws SocialDriverNotConfigured
*/
public function startLogIn($socialDriver)
{
$driver = $this->validateDriver($socialDriver);
return $this->getSocialDriver($driver)->redirect();
}
/**
* Start the social registration process
* @param string $socialDriver
* @return \Symfony\Component\HttpFoundation\RedirectResponse
* @throws SocialDriverNotConfigured
*/
public function startRegister($socialDriver)
{
$driver = $this->validateDriver($socialDriver);
return $this->getSocialDriver($driver)->redirect();
}
/**
* Handle the social registration process on callback.
* @param string $socialDriver
* @param SocialUser $socialUser
* @return SocialUser
* @throws UserRegistrationException
*/
public function handleRegistrationCallback(string $socialDriver, SocialUser $socialUser)
{
// Check social account has not already been used
if ($this->socialAccount->where('driver_id', '=', $socialUser->getId())->exists()) {
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throw new UserRegistrationException(trans('errors.social_account_in_use', ['socialAccount'=>$socialDriver]), '/login');
}
if ($this->userRepo->getByEmail($socialUser->getEmail())) {
$email = $socialUser->getEmail();
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throw new UserRegistrationException(trans('errors.social_account_in_use', ['socialAccount'=>$socialDriver, 'email' => $email]), '/login');
}
return $socialUser;
}
/**
* Get the social user details via the social driver.
* @param string $socialDriver
* @return SocialUser
* @throws SocialDriverNotConfigured
*/
public function getSocialUser(string $socialDriver)
{
$driver = $this->validateDriver($socialDriver);
return $this->socialite->driver($driver)->user();
}
/**
* Handle the login process on a oAuth callback.
* @param $socialDriver
* @param SocialUser $socialUser
* @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
* @throws SocialSignInAccountNotUsed
*/
public function handleLoginCallback($socialDriver, SocialUser $socialUser)
{
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$socialId = $socialUser->getId();
// Get any attached social accounts or users
$socialAccount = $this->socialAccount->where('driver_id', '=', $socialId)->first();
$isLoggedIn = auth()->check();
$currentUser = user();
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// When a user is not logged in and a matching SocialAccount exists,
// Simply log the user into the application.
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if (!$isLoggedIn && $socialAccount !== null) {
auth()->login($socialAccount->user);
return redirect()->intended('/');
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}
// When a user is logged in but the social account does not exist,
// Create the social account and attach it to the user & redirect to the profile page.
if ($isLoggedIn && $socialAccount === null) {
$this->fillSocialAccount($socialDriver, $socialUser);
$currentUser->socialAccounts()->save($this->socialAccount);
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session()->flash('success', trans('settings.users_social_connected', ['socialAccount' => title_case($socialDriver)]));
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return redirect($currentUser->getEditUrl());
}
// When a user is logged in and the social account exists and is already linked to the current user.
if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id === $currentUser->id) {
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session()->flash('error', trans('errors.social_account_existing', ['socialAccount' => title_case($socialDriver)]));
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return redirect($currentUser->getEditUrl());
}
// When a user is logged in, A social account exists but the users do not match.
if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id != $currentUser->id) {
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session()->flash('error', trans('errors.social_account_already_used_existing', ['socialAccount' => title_case($socialDriver)]));
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return redirect($currentUser->getEditUrl());
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}
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// Otherwise let the user know this social account is not used by anyone.
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$message = trans('errors.social_account_not_used', ['socialAccount' => title_case($socialDriver)]);
if (setting('registration-enabled')) {
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$message .= trans('errors.social_account_register_instructions', ['socialAccount' => title_case($socialDriver)]);
}
throw new SocialSignInAccountNotUsed($message, '/login');
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}
/**
* Ensure the social driver is correct and supported.
*
* @param $socialDriver
* @return string
* @throws SocialDriverNotConfigured
*/
private function validateDriver($socialDriver)
{
$driver = trim(strtolower($socialDriver));
if (!in_array($driver, $this->validSocialDrivers)) {
abort(404, trans('errors.social_driver_not_found'));
}
if (!$this->checkDriverConfigured($driver)) {
throw new SocialDriverNotConfigured(trans('errors.social_driver_not_configured', ['socialAccount' => title_case($socialDriver)]));
}
return $driver;
}
/**
* Check a social driver has been configured correctly.
* @param $driver
* @return bool
*/
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private function checkDriverConfigured($driver)
{
$lowerName = strtolower($driver);
$configPrefix = 'services.' . $lowerName . '.';
$config = [config($configPrefix . 'client_id'), config($configPrefix . 'client_secret'), config('services.callback_url')];
return !in_array(false, $config) && !in_array(null, $config);
}
/**
* Gets the names of the active social drivers.
* @return array
*/
public function getActiveDrivers()
{
$activeDrivers = [];
foreach ($this->validSocialDrivers as $driverKey) {
if ($this->checkDriverConfigured($driverKey)) {
$activeDrivers[$driverKey] = $this->getDriverName($driverKey);
}
}
return $activeDrivers;
}
/**
* Get the presentational name for a driver.
* @param $driver
* @return mixed
*/
public function getDriverName($driver)
{
return config('services.' . strtolower($driver) . '.name');
}
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/**
* Check if the current config for the given driver allows auto-registration.
* @param string $driver
* @return bool
*/
public function driverAutoRegisterEnabled(string $driver)
{
return config('services.' . strtolower($driver) . '.auto_register') === true;
}
/**
* Check if the current config for the given driver allow email address auto-confirmation.
* @param string $driver
* @return bool
*/
public function driverAutoConfirmEmailEnabled(string $driver)
{
return config('services.' . strtolower($driver) . '.auto_confirm') === true;
}
/**
* @param string $socialDriver
* @param SocialUser $socialUser
* @return SocialAccount
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*/
public function fillSocialAccount($socialDriver, $socialUser)
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{
$this->socialAccount->fill([
'driver' => $socialDriver,
'driver_id' => $socialUser->getId(),
'avatar' => $socialUser->getAvatar()
]);
return $this->socialAccount;
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}
/**
* Detach a social account from a user.
* @param $socialDriver
* @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
*/
public function detachSocialAccount($socialDriver)
{
user()->socialAccounts()->where('driver', '=', $socialDriver)->delete();
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session()->flash('success', trans('settings.users_social_disconnected', ['socialAccount' => title_case($socialDriver)]));
return redirect(user()->getEditUrl());
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}
/**
* Provide redirect options per service for the Laravel Socialite driver
* @param $driverName
* @return \Laravel\Socialite\Contracts\Provider
*/
public function getSocialDriver(string $driverName)
{
$driver = $this->socialite->driver($driverName);
if ($driverName === 'google' && config('services.google.select_account')) {
$driver->with(['prompt' => 'select_account']);
}
return $driver;
}
}