Controllers/UserAuthController.php

   1 <?php
   2
   3 namespace Controllers;
   4
   5 use Domain\Util;
   6 use Services\Http\IHttpResponse;
   7 use Services\Http\IHttpRequest;
   8 use Services\IFacebookSessionFactory;
   9 use Domain\Entities\IUserStepByStepBuilder;
  10 use DataAccess\IUserRepository;
  11 use Facebook\FacebookSession;
  12 use Facebook\FacebookRequest;
  13 use Facebook\GraphUser;
  14 use Facebook\GraphLocation;
  15
  16 class UserAuthController implements IDivineController
  17 {
  18     private $_response;
  19     private $_request;
  20     private $_facebookSessionFactory;
  21     private $_facebookSession;
  22     private $_facebookRequest;
  23     private $_userRepository;
  24
  25     /* @var $_userStepByStepBuilder Domain\Entities\UserStepByStepBuilder */
  26     private $_userStepByStepBuilder;
  27
  28     //override
  29     public function __construct(
  30         IHttpRequest $request,
  31         IHttpResponse $response,
  32         IFacebookSessionFactory $facebookSessionFactory,
  33         IUserRepository $userRepository,
  34         IUserStepByStepBuilder $userStepByStepBuilder
  35     ) {
  36         $this->_request = $request;
  37         $this->_response = $response;
  38         $this->_facebookSessionFactory = $facebookSessionFactory;
  39         $this->_userRepository = $userRepository;
  40         $this->_userStepByStepBuilder = $userStepByStepBuilder;
  41     }
  42
  43     public function indexAction() {
  44         $token = $this->validateAuthRequest();
  45         $facebookSession = $this->_facebookSessionFactory->createInstance($token);
  46
  47         //If it fails to validate the exception will deal with it.
  48         $facebookSession->validate();
  49
  50         $this->_facebookSession = $this->isSessionLongLived($facebookSession) ? $facebookSession->getLongLivedSession() : $facebookSession;
  51         $this->_facebookRequest = (new FacebookRequest($this->_facebookSession, 'GET', '/me?fields=hometown,first_name,last_name'))->execute();
  52
  53         $id = $this->_facebookRequest->getGraphObject(GraphUser::className())->getId();
  54
  55         // If the user is not in the DB, create them.
  56         $user = $this->_userRepository->findByFacebookId($id) ?: $this->registerUser();
  57
  58         $this->_response->setHeader('Content-Type', 'application/json')
  59                         ->setBody(json_encode(array('token' => $this->_facebookSession->getToken(), 'expires' => $this->getSessionExpiryTimestamp($this->_facebookSession), 'displayName' => $user->getDisplayName())))
  60                         ->sendResponse();
  61     }
  62
  63     private function validateAuthRequest()
  64     {
  65         $request = $this->_request->get();
  66         $response = $this->_response->setHeader('Content-Type', 'application/json');
  67
  68         if(!isset($request['token']))
  69         {
  70             //TODO: Perhaps I should be using the status reporter class here (and above).
  71             //Will require changes to front end though, but at least it would be more consistent.
  72             $response->setBody(json_encode(array('result' => 'error', 'message' => 'missing auth token')))
  73                      ->sendResponse();
  74             die();
  75         }
  76
  77         return $request['token'];
  78     }
  79
  80     private function registerUser()
  81     {
  82         $userProfile = $this->_facebookRequest->getGraphObject(GraphUser::className());
  83
  84         $homeTown = $userProfile->getProperty('hometown');
  85
  86         if($homeTown)
  87         {
  88             $homeTownPageId = $homeTown ? $homeTown->getProperty('id') : null;
  89
  90             $pageRequest = (new FacebookRequest($this->_facebookSession, 'GET', '/' . $homeTownPageId ))->execute();
  91             $pageLocation = $pageRequest->getGraphObject(GraphLocation::className())->getProperty('location')->cast(GraphLocation::className());
  92
  93             $country = Util::countryNameFromLatLong($pageLocation->getLatitude(), $pageLocation->getLongitude());
  94         }
  95
  96         $firstName = $userProfile->getFirstName();
  97         $lastName = $userProfile->getLastName();
  98         $facebookId = $userProfile->getId();
  99
 100         //TODO: Is insantiating the VO classes here a good idea?
 101         $newUser = $this->_userStepByStepBuilder->With_DisplayName($firstName)
 102                                                 ->With_Name(new \Domain\VOs\Name($firstName, $lastName))
 103                                                 ->With_Tags(array())
 104                                                 ->With_FacebookId($facebookId)
 105                                                 ->With_Quota(100000000) //XXX: quota is in bytes
 106                                                 //XXX: Is this confusing? Maybe better to do a conditional and only call with_country when we have a country
 107                                                 ->With_Country(isset($country) ? new \Domain\VOs\Country($country) : null)
 108                                                 ->build();
 109
 110         $this->_userRepository->save($newUser);
 111
 112         return $newUser;
 113     }
 114
 115     private function isSessionLongLived(FacebookSession $session)
 116     {
 117         return $this->getSessionExpiryTimestamp($session) - time() >= 60;
 118     }
 119
 120     private function getSessionExpiryTimestamp(FacebookSession $session)
 121     {
 122         return $session->getSessionInfo()->getExpiresAt()->format('U');
 123     }
 124 }