Pony.fm/app/Http/Controllers/AuthController.php

<?php

use App\Http\Controllers\Controller;
use App\User;

class AuthController extends Controller
{
    protected $poniverse;

    public function __construct()
    {
        $this->poniverse = new Poniverse(Config::get('poniverse.client_id'), Config::get('poniverse.secret'));
        $this->poniverse->setRedirectUri(URL::to('/auth/oauth'));
    }

    public function getLogin()
    {
        if (Auth::guest()) {
            return Redirect::to($this->poniverse->getAuthenticationUrl('login'));
        }

        return Redirect::to('/');
    }

    public function postLogout()
    {
        Auth::logout();

        return Redirect::to('/');
    }

    public function getOAuth()
    {
        $code = $this->poniverse->getClient()->getAccessToken(
            Config::get('poniverse.urls')['token'],
            'authorization_code',
            [
                'code' => Input::query('code'),
                'redirect_uri' => URL::to('/auth/oauth')
            ]);

        if ($code['code'] != 200) {
            if ($code['code'] == 400 && $code['result']['error_description'] == 'The authorization code has expired' && !isset($this->request['login_attempt'])) {
                return Redirect::to($this->poniverse->getAuthenticationUrl('login_attempt'));
            }

            return Redirect::to('/')->with('message',
                'Unfortunately we are having problems attempting to log you in at the moment. Please try again at a later time.');
        }

        $this->poniverse->setAccessToken($code['result']['access_token']);
        $poniverseUser = $this->poniverse->getUser();
        $token = DB::table('oauth2_tokens')->where('external_user_id', '=', $poniverseUser['id'])->where('service', '=',
            'poniverse')->first();

        $setData = [
            'access_token' => $code['result']['access_token'],
            'expires' => date('Y-m-d H:i:s', strtotime("+" . $code['result']['expires_in'] . " Seconds", time())),
            'type' => $code['result']['token_type'],
        ];

        if (isset($code['result']['refresh_token']) && !empty($code['result']['refresh_token'])) {
            $setData['refresh_token'] = $code['result']['refresh_token'];
        }

        if ($token) {
            //User already exists, update access token and refresh token if provided.
            DB::table('oauth2_tokens')->where('id', '=', $token->id)->update($setData);

            return $this->loginRedirect(User::find($token->user_id));
        }

        //Check by email to see if they already have an account
        $localMember = User::where('email', '=', $poniverseUser['email'])->first();

        if ($localMember) {
            return $this->loginRedirect($localMember);
        }

        $user = new User;

        $user->mlpforums_name = $poniverseUser['username'];
        $user->display_name = $poniverseUser['display_name'];
        $user->email = $poniverseUser['email'];
        $user->created_at = gmdate("Y-m-d H:i:s", time());
        $user->uses_gravatar = 1;

        $user->save();

        //We need to insert a new token row :O

        $setData['user_id'] = $user->id;
        $setData['external_user_id'] = $poniverseUser['id'];
        $setData['service'] = 'poniverse';

        DB::table('oauth2_tokens')->insert($setData);

        return $this->loginRedirect($user);
    }

    protected function loginRedirect($user, $rememberMe = true)
    {
        Auth::login($user, $rememberMe);

        return Redirect::to('/');
    }
}