2015-09-04 18:50:52 +02:00
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<?php namespace Oxbow\Services;
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use Laravel\Socialite\Contracts\Factory as Socialite;
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use Oxbow\Exceptions\SocialDriverNotConfigured;
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2015-09-04 21:40:36 +02:00
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use Oxbow\Exceptions\SocialSignInException;
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2015-09-04 18:50:52 +02:00
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use Oxbow\Repos\UserRepo;
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2015-09-04 21:40:36 +02:00
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use Oxbow\SocialAccount;
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use Oxbow\User;
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2015-09-04 18:50:52 +02:00
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class SocialAuthService
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{
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protected $userRepo;
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protected $socialite;
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protected $socialAccount;
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protected $validSocialDrivers = ['google', 'github'];
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/**
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* SocialAuthService constructor.
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* @param UserRepo $userRepo
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* @param Socialite $socialite
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* @param SocialAccount $socialAccount
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*/
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public function __construct(UserRepo $userRepo, Socialite $socialite, SocialAccount $socialAccount)
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{
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$this->userRepo = $userRepo;
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$this->socialite = $socialite;
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$this->socialAccount = $socialAccount;
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2015-09-04 18:50:52 +02:00
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}
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2015-09-04 21:40:36 +02:00
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/**
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* Start the social login path.
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* @param $socialDriver
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* @return \Symfony\Component\HttpFoundation\RedirectResponse
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* @throws SocialDriverNotConfigured
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*/
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public function startLogIn($socialDriver)
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{
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$driver = $this->validateDriver($socialDriver);
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return $this->socialite->driver($driver)->redirect();
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}
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/**
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* Get a user from socialite after a oAuth callback.
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*
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* @param $socialDriver
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* @return User
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* @throws SocialDriverNotConfigured
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* @throws SocialSignInException
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*/
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public function handleCallback($socialDriver)
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{
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$driver = $this->validateDriver($socialDriver);
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// Get user details from social driver
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$socialUser = $this->socialite->driver($driver)->user();
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$socialId = $socialUser->getId();
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// Get any attached social accounts or users
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$socialAccount = $this->socialAccount->where('driver_id', '=', $socialId)->first();
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$user = $this->userRepo->getByEmail($socialUser->getEmail());
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$isLoggedIn = auth()->check();
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$currentUser = auth()->user();
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// When a user is not logged in but a matching SocialAccount exists,
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// Log the user found on the SocialAccount into the application.
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if (!$isLoggedIn && $socialAccount !== null) {
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return $this->logUserIn($socialAccount->user);
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}
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// When a user is logged in but the social account does not exist,
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// Create the social account and attach it to the user & redirect to the profile page.
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if ($isLoggedIn && $socialAccount === null) {
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$this->fillSocialAccount($socialDriver, $socialUser);
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$currentUser->socialAccounts()->save($this->socialAccount);
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\Session::flash('success', title_case($socialDriver) . ' account was successfully attached to your profile.');
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return redirect($currentUser->getEditUrl());
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}
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// When a user is logged in and the social account exists and is already linked to the current user.
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if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id === $currentUser->id) {
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\Session::flash('error', 'This ' . title_case($socialDriver) . ' account is already attached to your profile.');
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return redirect($currentUser->getEditUrl());
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}
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// When a user is logged in, A social account exists but the users do not match.
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// Change the user that the social account is assigned to.
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if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id != $currentUser->id) {
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$socialAccount->user_id = $currentUser->id;
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$socialAccount->save();
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\Session::flash('success', 'This ' . title_case($socialDriver) . ' account is now attached to your profile.');
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}
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if ($user === null) {
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throw new SocialSignInException('A system user with the email ' . $socialUser->getEmail() .
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' was not found and this ' . $socialDriver . ' account is not linked to any users.', '/login');
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}
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return $this->authenticateUserWithNewSocialAccount($user, $socialUser, $socialUser);
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}
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/**
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* Logs a user in and creates a new social account entry for future usage.
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* @param User $user
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* @param string $socialDriver
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* @param \Laravel\Socialite\Contracts\User $socialUser
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* @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
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*/
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private function authenticateUserWithNewSocialAccount($user, $socialDriver, $socialUser)
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{
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$this->fillSocialAccount($socialDriver, $socialUser);
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$user->socialAccounts()->save($this->socialAccount);
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return $this->logUserIn($user);
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}
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private function logUserIn($user)
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{
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auth()->login($user);
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return redirect('/');
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}
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/**
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* Ensure the social driver is correct and supported.
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*
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* @param $socialDriver
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* @return string
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* @throws SocialDriverNotConfigured
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*/
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private function validateDriver($socialDriver)
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{
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$driver = trim(strtolower($socialDriver));
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if (!in_array($driver, $this->validSocialDrivers)) abort(404, 'Social Driver Not Found');
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if (!$this->checkDriverConfigured($driver)) throw new SocialDriverNotConfigured;
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return $driver;
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}
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/**
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* Check a social driver has been configured correctly.
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* @param $driver
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* @return bool
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*/
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private function checkDriverConfigured($driver)
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{
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$upperName = strtoupper($driver);
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$config = [env($upperName . '_APP_ID', false), env($upperName . '_APP_SECRET', false), env('APP_URL', false)];
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return (!in_array(false, $config) && !in_array(null, $config));
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}
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/**
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* Gets the names of the active social drivers.
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* @return array
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*/
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public function getActiveDrivers()
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{
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$activeDrivers = [];
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foreach ($this->validSocialDrivers as $driverName) {
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if ($this->checkDriverConfigured($driverName)) {
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$activeDrivers[$driverName] = true;
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}
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}
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return $activeDrivers;
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}
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2015-09-04 21:40:36 +02:00
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/**
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* @param $socialDriver
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* @param $socialUser
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*/
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private function fillSocialAccount($socialDriver, $socialUser)
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{
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$this->socialAccount->fill([
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'driver' => $socialDriver,
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'driver_id' => $socialUser->getId(),
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'avatar' => $socialUser->getAvatar()
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]);
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}
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/**
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* Detach a social account from a user.
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* @param $socialDriver
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* @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
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*/
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public function detachSocialAccount($socialDriver)
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{
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session();
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auth()->user()->socialAccounts()->where('driver', '=', $socialDriver)->delete();
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\Session::flash('success', $socialDriver . ' account successfully detached');
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return redirect(auth()->user()->getEditUrl());
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}
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}
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