GitHubController.php

<?php

namespace GitHub\Controller;

use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;
use Zend\Http\ClientStatic;

use GitHubAPIv3\UserAPI;

class GitHubController extends AbstractActionController
{
    public function indexAction()
    {
        $session = $this->getServiceLocator()->get('github-session');
        $vars = array();

        if (isset($session['access_token'])) {
            $token = $session['access_token'];

            $client = new UserAPI($token);
            $user = $client->getAuthenticatedUser();
            //$vars['user'] = $user;
            $vars['user'] = $client->getUser('weierophinney');
        }

        $vm = new ViewModel($vars);
        $vm->setTemplate('github/github/index');
        return $vm;
    }

    public function sendToGitHubAction()
    {
        /** @var $session \Zend\Session\Container */
        $session = $this->getServiceLocator()->get('github-session');
        $session['state'] = $login_state = uniqid('state', true);

        $config = $this->serviceLocator->get('config');
        $loginConfig = $config['login'];

        $url = 'https://github.com/login/oauth/authorize?';
        $url .= 'client_id=' . $loginConfig['github_client_id'];
        $url .= '&scope=repo';
        $url .= '&state=' . $login_state;
        return $this->redirect()->toUrl($url);
    }

    public function completeAction()
    {
        /** @var $request \Zend\Http\Request */
        $request = $this->getRequest();

        $code = $request->getQuery('code');
        $state = $request->getQuery('state');

        if ($code == '' || $state == '') {
            return $this->redirect()->toRoute('github', array('action' => 'index'));
        }

        /** @var $session \Zend\Session\Container */
        $session = $this->getServiceLocator()->get('github-session');

        if ($state !== $session['state']) {
            throw new \Exception('Invalid state.');
        }

        $config = $this->serviceLocator->get('config');
        $loginConfig = $config['login'];

        $response = ClientStatic::post(
            'https://github.com/login/oauth/access_token',
            array(
                'client_id' => $loginConfig['github_client_id'],
                'client_secret' => $loginConfig['github_client_secret'],
                'code' => $code,
                'state' => $state
            ),
            array(
                'Accept' => 'application/json'
            )
        );

        unset($session['state']);

        $body = $response->getBody();
        $response = json_decode($body);

        $session['access_token'] = $response->access_token;

        $vm = new ViewModel();
        $vm->setTemplate('github/github/complete');
        return $vm;
    }

}