Upgrade to Facebook Graph API v5.4.2

.gitmodules

@@ -1,9 +1,9 @@
 [submodule "include/flight"]
 	path = include/flight
 	url = https://github.com/mikecao/flight/
-[submodule "include/facebook-php-sdk-v4"]
-	path = include/facebook-php-sdk-v4
-	url = https://github.com/facebook/facebook-php-sdk-v4.git
 [submodule "static/fontawesome"]
 	path = static/fontawesome
 	url = https://github.com/FortAwesome/Font-Awesome.git
+[submodule "include/php-graph-sdk"]
+	path = include/php-graph-sdk
+	url = https://github.com/facebook/php-graph-sdk

handlers/fb_handlers.php

@@ -24,18 +24,20 @@
 // and Facebook
 
 // TODO: this only works if the script is installed in root
-define('FACEBOOK_SDK_V4_SRC_DIR', __DIR__ . '/../include/facebook-php-sdk-v4/src/Facebook/');
-require_once(__DIR__ . '/../include/facebook-php-sdk-v4/autoload.php');
+define('FACEBOOK_SDK_V4_SRC_DIR', __DIR__ . '/../include/php-graph-sdk/src/Facebook');
+require_once(__DIR__ . '/../include/php-graph-sdk/src/Facebook/autoload.php');
 
 require_once(__DIR__ . '/../tokens.php');
 
-use Facebook\FacebookSession;
-use Facebook\FacebookRequest;
-use Facebook\FacebookRequestException;
-use Facebook\FacebookRedirectLoginHelper;
+use Facebook\Facebook;
+use Facebook\Exceptions\FacebookResponseException;
+use Facebook\Exceptions\FacebookSDKException;
 
-FacebookSession::setDefaultApplication(APP_ID,
-     APP_SECRET);
+Flight::set('fb', new Facebook([
+  'app_id' => APP_ID,
+  'app_secret' => APP_SECRET,
+  'default_graph_version' => 'v2.8',
+]));
 
 
 Flight::set('retry_url', MY_URL .'login');
@@ -67,25 +69,20 @@ function render_boilerplate() {
 }
 
 
-function check_permissions($session) {
-
-    $request = new FacebookRequest(
-        $session,
-        'GET',
-        '/me/permissions'
-    );
-
+function check_permissions($accessToken) {
+
+    $fb = Flight::get('fb');
+
     try {
-        $response = $request->execute();
-        $graphObject = $response->getGraphObject()->asArray();
-        // http://stackoverflow.com/q/23527919
-        foreach ($graphObject as $key => $permissionObject) {
-            //print_r($permission);
-            if ($permissionObject->permission == 'publish_actions') {
-                return $permissionObject->status == 'granted';
+        $response = $fb->get('/me/permissions', $accessToken);
+        $graphEdge = $response->getGraphEdge();
+
+        foreach($graphEdge as $graphNode) {  
+            if ($graphNode->getField('permission') == 'publish_actions') {
+                return $graphNode->getField('status') == 'granted';
             }
         }
-    } catch (FacebookRequestException $ex) {
+    } catch (FacebookResponseException $ex) {
         Flight::error($ex);
     } catch (\Exception $ex) {
         Flight::error($ex);
@@ -107,12 +104,13 @@ function handle_root() {
 // if the user does not grant publish_actions,
 // we go here and ask again
 function handle_rerequest_permission() {
+    $fb = Flight::get('fb');
     render_boilerplate();
     // Simplification: always assume we are not logged in!
-    $helper = new FacebookRedirectLoginHelper(MY_URL . 'fb_callback/');
+    $helper = $fb->getRedirectLoginHelper();
     // We do want to publish to the user's wall!
     $scope = array('publish_actions');
-    $fb_login_url = $helper->getReRequestUrl($scope);
+    $fb_login_url = $helper->getReRequestUrl(MY_URL . 'fb_callback/', $scope);
     Flight::render('rerequest_permission', array(
         'fburl' => $fb_login_url,
         ));
@@ -121,20 +119,21 @@ function handle_rerequest_permission() {
 // In the FB callback, we show a form to the user
 // or an error message if something went wrong.
 function handle_fb_callback() {
+    $fb = Flight::get('fb');
     render_boilerplate();
-    $helper = new FacebookRedirectLoginHelper(MY_URL . 'fb_callback/');
+    $helper = $fb->getRedirectLoginHelper();
     try {
-        $session = $helper->getSessionFromRedirect();
-    } catch(FacebookRequestException $ex) {
+        $accessToken = $helper->getAccessToken();
+    } catch(FacebookSDKException $ex) {
       // When Facebook returns an error
         Flight::error($ex);
     } catch(\Exception $ex) {
         // When validation fails or other local issues
         Flight:error($ex);
     }
-    if ($session) {
-        $_SESSION['FBTOKEN'] = $session->getToken();
-        if (check_permissions($session)) {
+    if (isset($accessToken)) {
+        $_SESSION['FBTOKEN'] = (string) $accessToken;
+        if (check_permissions($accessToken)) {
             $_SESSION['FB_CHECKIN_NONCE'] = make_nonce();
             Flight::render('fb_callback', array(
                 'post_action' => MY_URL .'checkin',
@@ -160,6 +159,7 @@ function handle_fb_callback() {
 }
 
 function handle_checkin() {
+    $fb = Flight::get('fb');
     render_boilerplate();
     // This happens if we unset the nonce below.
     // Or if the nonce was never set, in which case the user
@@ -195,29 +195,22 @@ function handle_checkin() {
     if (empty($token)) {
         Flight::error(new Exception('No FB token in session!'));
     }
-    $session = new FacebookSession($token);
     $message = Flight::request()->query->message;
 
     $config = array('place' => PAGE_ID);
     if (! empty($message)) {
         $config['message'] = $message;
     }
-    $request = new FacebookRequest(
-        $session,
-        'POST',
-        '/me/feed',
-        $config
-    );
     // Some exceptions can be caught and handled sanely,
     // e.g. Duplicate status message (506)
     try {
-        $response = $request->execute()->getGraphObject();
-    } catch (FacebookRequestException $ex) {
+        $response = $fb->post('/me/feed', $config, $token);
+    } catch (FacebookResponseException $ex) {
         Flight::error($ex);
     } catch (\Exception $ex) {
         Flight::error($ex);
     }
-    $postid = $response->asArray()['id'];
+    $postid = $response->getGraphNode()->getField('id');
     $posturl = 'https://www.facebook.com/' . $postid;
     Flight::render('checkin',
         array(
@@ -227,17 +220,17 @@ function handle_checkin() {
 }
 
 function fblogin() {
-
+    $fb = Flight::get('fb');
     // Simplification: always assume we are not logged in!
-    $helper = new FacebookRedirectLoginHelper(MY_URL . 'fb_callback/');
+    $helper = $fb->getRedirectLoginHelper();
     // We do want to publish to the user's wall!
     // Note: Facebook docs state that login and write permission request
     // should be two separate requests.
     // The code is already set up to handle this separately, but I believe
     // the combined flow provides better UX.
     // https://developers.facebook.com/docs/facebook-login/permissions/v2.2
     $scope = array('publish_actions');
-    $fb_login_url = $helper->getLoginUrl($scope);
+    $fb_login_url = $helper->getLoginUrl(MY_URL . 'fb_callback/', $scope);
     $code_login_url = MY_URL . 'access_code/';
     Flight::render('login', array(
         'fburl' => $fb_login_url,