]> git.mxchange.org Git - friendica-addons.git/blobdiff - facebook/facebook.php
Show the pseudo-user Administrator instead of a broken image
[friendica-addons.git] / facebook / facebook.php
index cc8b85cdba6ef7d04ea5b7c2ca03868d51c3d66c..8fcde40332e7ff02fc6c94a675e947c16510a017 100755 (executable)
@@ -1,8 +1,9 @@
 <?php
 /**
  * Name: Facebook Connector
- * Version: 1.0
+ * Version: 1.1
  * Author: Mike Macgirvin <http://macgirvin.com/profile/mike>
+ *         Tobias Hößl <https://github.com/CatoTH/>
  */
 
 /**
  *    and click 'Install Facebook Connector'.
  * 4. This will ask you to login to Facebook and grant permission to the 
  *    plugin to do its stuff. Allow it to do so. 
- * 5. You're done. To turn it off visit the Plugin Settings page again and
+ * 5. Optional step: If you want to use Facebook Real Time Updates (so new messages
+ *    and new contacts are added ~1min after they are postet / added on FB), go to
+ *    Settings -> plugins -> facebook and press the "Activate Real-Time Updates"-button.
+ * 6. You're done. To turn it off visit the Plugin Settings page again and
  *    'Remove Facebook posting'.
  *
  * Vidoes and embeds will not be posted if there is no other content. Links 
  * authenticate to your site to establish identity. We will address this 
  * in a future release.
  */
+ /** TODO
+ * - Implement a method for the administrator to delete all configuration data the plugin has created,
+ *   e.g. the app_access_token
+ * - Implement a configuration option to set the polling interval system-wide
+ */
 
 define('FACEBOOK_MAXPOSTLEN', 420);
+define('FACEBOOK_SESSION_ERR_NOTIFICATION_INTERVAL', 259200); // 3 days
 
 
 function facebook_install() {
@@ -52,6 +63,7 @@ function facebook_install() {
        register_hook('jot_networks',     'addon/facebook/facebook.php', 'facebook_jot_nets');
        register_hook('connector_settings',  'addon/facebook/facebook.php', 'facebook_plugin_settings');
        register_hook('cron',             'addon/facebook/facebook.php', 'facebook_cron');
+       register_hook('enotify',          'addon/facebook/facebook.php', 'facebook_enotify');
        register_hook('queue_predeliver', 'addon/facebook/facebook.php', 'fb_queue_hook');
 }
 
@@ -62,6 +74,7 @@ function facebook_uninstall() {
        unregister_hook('jot_networks',     'addon/facebook/facebook.php', 'facebook_jot_nets');
        unregister_hook('connector_settings',  'addon/facebook/facebook.php', 'facebook_plugin_settings');
        unregister_hook('cron',             'addon/facebook/facebook.php', 'facebook_cron');
+       unregister_hook('enotify',          'addon/facebook/facebook.php', 'facebook_enotify');
        unregister_hook('queue_predeliver', 'addon/facebook/facebook.php', 'fb_queue_hook');
 
        // hook moved
@@ -84,7 +97,7 @@ function facebook_init(&$a) {
        if (x($_REQUEST, "realtime_cb") && x($_REQUEST, "realtime_cb")) {
                logger("facebook_init: Facebook Real-Time callback called", LOGGER_DEBUG);
                
-               if (x($_REQUEST["hub_verify_token"])) {
+               if (x($_REQUEST, "hub_verify_token")) {
                        // this is the verification callback while registering for real time updates
                        
                        $verify_token = get_config('facebook', 'cb_verify_token');
@@ -113,7 +126,7 @@ function facebook_init(&$a) {
                        return;
                }
                
-               $affected_users = array("feed" => array(), "friends" => array(), "activities" => array());
+               $affected_users = array("feed" => array(), "friends" => array());
                
                foreach ($js->entry as $entry) {
                        $fbuser = $entry->uid;
@@ -123,36 +136,43 @@ function facebook_init(&$a) {
                                        continue;
                                }
                                if (in_array($fbuser, $affected_users[$field])) continue;
+                               
+                               $r = q("SELECT `uid` FROM `pconfig` WHERE `cat` = 'facebook' AND `k` = 'self_id' AND `v` = '%s' LIMIT 1", dbesc($fbuser));
+                               if(! count($r))
+                                       continue;
+                               $uid = $r[0]['uid'];
+                               
+                               $access_token = get_pconfig($uid,'facebook','access_token');
+                               if(! $access_token)
+                                       return;
+                               
                                switch ($field) {
                                        case "feed":
                                                logger('facebook_init: FB-User ' . $fbuser . ' / feed', LOGGER_DEBUG);
                                                
-                                               $r = q("SELECT `uid` FROM `pconfig` WHERE `cat` = 'facebook' AND `k` = 'self_id' AND `v` = '%s' LIMIT 1", dbesc($fbuser));
-                                               if(! count($r))
-                                                       continue;
-                                               $uid = $r[0]['uid'];
-                                               
-                                               $access_token = get_pconfig($uid,'facebook','access_token');
-                                               if(! $access_token)
-                                                       return;
-       
                                                if(! get_pconfig($uid,'facebook','no_wall')) {
                                                        $private_wall = intval(get_pconfig($uid,'facebook','private_wall'));
                                                        $s = fetch_url('https://graph.facebook.com/me/feed?access_token=' . $access_token);
                                                        if($s) {
                                                                $j = json_decode($s);
-                                                               logger('facebook_init: wall: ' . print_r($j,true), LOGGER_DATA);
-                                                               fb_consume_stream($uid,$j,($private_wall) ? false : true);
+                                                               if (isset($j->data)) {
+                                                                       logger('facebook_init: wall: ' . print_r($j,true), LOGGER_DATA);
+                                                                       fb_consume_stream($uid,$j,($private_wall) ? false : true);
+                                                               } else {
+                                                                       logger('facebook_init: wall: got no data from Facebook: ' . print_r($j,true), LOGGER_NORMAL);
+                                                               }
                                                        }
                                                }
                                                
                                        break;
-                                       case "friend":
-                                               // @TODO
-                                       break;
-                                       case "activities":
-                                               //@TODO
+                                       case "friends":
+                                               logger('facebook_init: FB-User ' . $fbuser . ' / friends', LOGGER_DEBUG);
+                                               
+                                               fb_get_friends($uid, false);
+                                               set_pconfig($uid,'facebook','friend_check',time());
                                        break;
+                                       default:
+                                               logger('facebook_init: Unknown callback field for ' . $fbuser, LOGGER_NORMAL);
                                }
                                $affected_users[$field][] = $fbuser;
                        }
@@ -171,8 +191,8 @@ function facebook_init(&$a) {
                return;
 
        $uid           = $r[0]['uid'];
-       $auth_code     = (($_GET['code']) ? $_GET['code'] : '');
-       $error         = (($_GET['error_description']) ? $_GET['error_description'] : '');
+       $auth_code     = (x($_GET, 'code') ? $_GET['code'] : '');
+       $error         = (x($_GET, 'error_description') ? $_GET['error_description'] : '');
 
 
        if($error)
@@ -199,7 +219,7 @@ function facebook_init(&$a) {
                        if(get_pconfig($uid,'facebook','no_linking') === false)
                                set_pconfig($uid,'facebook','no_linking',1);
                        fb_get_self($uid);
-                       fb_get_friends($uid);
+                       fb_get_friends($uid, true);
                        fb_consume_all($uid);
 
                }
@@ -220,116 +240,46 @@ function fb_get_self($uid) {
        }
 }
 
-
-
-function fb_get_friends($uid) {
-
-       $r = q("SELECT `uid` FROM `user` WHERE `uid` = %d AND `account_expired` = 0 LIMIT 1",
-               intval($uid)
+function fb_get_friends_sync_new($uid, $access_token, $person) {
+       $link = 'http://facebook.com/profile.php?id=' . $person->id;
+       
+       $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
+               intval($uid),
+               dbesc($link)
        );
-       if(! count($r))
-               return;
-
-       $access_token = get_pconfig($uid,'facebook','access_token');
-
-       $no_linking = get_pconfig($uid,'facebook','no_linking');
-       if($no_linking)
-               return;
+       
+       if (count($r) == 0) {
+               logger('fb_get_friends: new contact found: ' . $link, LOGGER_DEBUG);
+               
+               fb_get_friends_sync_full($uid, $access_token, $person);
+       }
+}
 
-       if(! $access_token)
-               return;
-       $s = fetch_url('https://graph.facebook.com/me/friends?access_token=' . $access_token);
+function fb_get_friends_sync_full($uid, $access_token, $person) {
+       $s = fetch_url('https://graph.facebook.com/' . $person->id . '?access_token=' . $access_token);
        if($s) {
-               logger('facebook: fb_get_friends: ' . $s, LOGGER_DATA);
-               $j = json_decode($s);
-               logger('facebook: fb_get_friends: json: ' . print_r($j,true), LOGGER_DATA);
-               if(! $j->data)
-                       return;
-               foreach($j->data as $person) {
-                       $s = fetch_url('https://graph.facebook.com/' . $person->id . '?access_token=' . $access_token);
-                       if($s) {
-                               $jp = json_decode($s);
-                               logger('fb_get_friends: info: ' . print_r($jp,true), LOGGER_DATA);
+               $jp = json_decode($s);
+               logger('fb_get_friends: info: ' . print_r($jp,true), LOGGER_DATA);
 
-                               // always use numeric link for consistency
+               // always use numeric link for consistency
 
-                               $jp->link = 'http://facebook.com/profile.php?id=' . $person->id;
+               $jp->link = 'http://facebook.com/profile.php?id=' . $person->id;
 
-                               // check if we already have a contact
+               // check if we already have a contact
 
-                               $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
-                                       intval($uid),
-                                       dbesc($jp->link)
-                               );                      
-
-                               if(count($r)) {
-
-                                       // check that we have all the photos, this has been known to fail on occasion
-
-                                       if((! $r[0]['photo']) || (! $r[0]['thumb']) || (! $r[0]['micro'])) {  
-                                               require_once("Photo.php");
-
-                                               $photos = import_profile_photo('https://graph.facebook.com/' . $jp->id . '/picture', $uid, $r[0]['id']);
-
-                                               $r = q("UPDATE `contact` SET `photo` = '%s', 
-                                                       `thumb` = '%s',
-                                                       `micro` = '%s', 
-                                                       `name-date` = '%s', 
-                                                       `uri-date` = '%s', 
-                                                       `avatar-date` = '%s'
-                                                       WHERE `id` = %d LIMIT 1
-                                               ",
-                                                       dbesc($photos[0]),
-                                                       dbesc($photos[1]),
-                                                       dbesc($photos[2]),
-                                                       dbesc(datetime_convert()),
-                                                       dbesc(datetime_convert()),
-                                                       dbesc(datetime_convert()),
-                                                       intval($r[0]['id'])
-                                               );                      
-                                       }       
-                                       continue;
-                               }
-                               else {
+               $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
+                       intval($uid),
+                       dbesc($jp->link)
+               );                      
 
-                                       // create contact record 
-                                       $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `alias`, `notify`, `poll`, 
-                                               `name`, `nick`, `photo`, `network`, `rel`, `priority`,
-                                               `writable`, `blocked`, `readonly`, `pending` )
-                                               VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, 0, 0, 0 ) ",
-                                               intval($uid),
-                                               dbesc(datetime_convert()),
-                                               dbesc($jp->link),
-                                               dbesc(normalise_link($jp->link)),
-                                               dbesc(''),
-                                               dbesc(''),
-                                               dbesc($jp->id),
-                                               dbesc('facebook ' . $jp->id),
-                                               dbesc($jp->name),
-                                               dbesc(($jp->nickname) ? $jp->nickname : strtolower($jp->first_name)),
-                                               dbesc('https://graph.facebook.com/' . $jp->id . '/picture'),
-                                               dbesc(NETWORK_FACEBOOK),
-                                               intval(CONTACT_IS_FRIEND),
-                                               intval(1),
-                                               intval(1)
-                                       );
-                               }
-
-                               $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
-                                       dbesc($jp->link),
-                                       intval($uid)
-                               );
-
-                               if(! count($r)) {
-                                       continue;
-                               }
+               if(count($r)) {
 
-                               $contact = $r[0];
-                               $contact_id  = $r[0]['id'];
+                       // check that we have all the photos, this has been known to fail on occasion
 
+                       if((! $r[0]['photo']) || (! $r[0]['thumb']) || (! $r[0]['micro'])) {  
                                require_once("Photo.php");
 
-                               $photos = import_profile_photo($r[0]['photo'],$uid,$contact_id);
+                               $photos = import_profile_photo('https://graph.facebook.com/' . $jp->id . '/picture', $uid, $r[0]['id']);
 
                                $r = q("UPDATE `contact` SET `photo` = '%s', 
                                        `thumb` = '%s',
@@ -345,11 +295,102 @@ function fb_get_friends($uid) {
                                        dbesc(datetime_convert()),
                                        dbesc(datetime_convert()),
                                        dbesc(datetime_convert()),
-                                       intval($contact_id)
+                                       intval($r[0]['id'])
                                );                      
+                       }       
+                       return;
+               }
+               else {
 
-                       }
+                       // create contact record 
+                       $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `alias`, `notify`, `poll`, 
+                               `name`, `nick`, `photo`, `network`, `rel`, `priority`,
+                               `writable`, `blocked`, `readonly`, `pending` )
+                               VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, 0, 0, 0 ) ",
+                               intval($uid),
+                               dbesc(datetime_convert()),
+                               dbesc($jp->link),
+                               dbesc(normalise_link($jp->link)),
+                               dbesc(''),
+                               dbesc(''),
+                               dbesc($jp->id),
+                               dbesc('facebook ' . $jp->id),
+                               dbesc($jp->name),
+                               dbesc(($jp->nickname) ? $jp->nickname : strtolower($jp->first_name)),
+                               dbesc('https://graph.facebook.com/' . $jp->id . '/picture'),
+                               dbesc(NETWORK_FACEBOOK),
+                               intval(CONTACT_IS_FRIEND),
+                               intval(1),
+                               intval(1)
+                       );
                }
+
+               $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
+                       dbesc($jp->link),
+                       intval($uid)
+               );
+
+               if(! count($r)) {
+                       return;
+               }
+
+               $contact = $r[0];
+               $contact_id  = $r[0]['id'];
+
+               require_once("Photo.php");
+
+               $photos = import_profile_photo($r[0]['photo'],$uid,$contact_id);
+
+               $r = q("UPDATE `contact` SET `photo` = '%s', 
+                       `thumb` = '%s',
+                       `micro` = '%s', 
+                       `name-date` = '%s', 
+                       `uri-date` = '%s', 
+                       `avatar-date` = '%s'
+                       WHERE `id` = %d LIMIT 1
+               ",
+                       dbesc($photos[0]),
+                       dbesc($photos[1]),
+                       dbesc($photos[2]),
+                       dbesc(datetime_convert()),
+                       dbesc(datetime_convert()),
+                       dbesc(datetime_convert()),
+                       intval($contact_id)
+               );                      
+
+       }
+}
+
+// if $fullsync is true, only new contacts are searched for
+
+function fb_get_friends($uid, $fullsync = true) {
+
+       $r = q("SELECT `uid` FROM `user` WHERE `uid` = %d AND `account_expired` = 0 LIMIT 1",
+               intval($uid)
+       );
+       if(! count($r))
+               return;
+
+       $access_token = get_pconfig($uid,'facebook','access_token');
+
+       $no_linking = get_pconfig($uid,'facebook','no_linking');
+       if($no_linking)
+               return;
+
+       if(! $access_token)
+               return;
+       $s = fetch_url('https://graph.facebook.com/me/friends?access_token=' . $access_token);
+       if($s) {
+               logger('facebook: fb_get_friends: ' . $s, LOGGER_DATA);
+               $j = json_decode($s);
+               logger('facebook: fb_get_friends: json: ' . print_r($j,true), LOGGER_DATA);
+               if(! $j->data)
+                       return;
+               foreach($j->data as $person)
+                       if ($fullsync)
+                               fb_get_friends_sync_full($uid, $access_token, $person);
+                       else
+                               fb_get_friends_sync_new($uid, $access_token, $person);
        }
 }
 
@@ -394,7 +435,7 @@ function facebook_post(&$a) {
                elseif(intval($no_linking) && intval($linkvalue)) {
                        // FB linkage is now allowed - import stuff.
                        fb_get_self($uid);
-                       fb_get_friends($uid);
+                       fb_get_friends($uid, true);
                        fb_consume_all($uid);
                }
 
@@ -419,7 +460,7 @@ function facebook_content(&$a) {
        }
 
        if($a->argc > 1 && $a->argv[1] === 'friends') {
-               fb_get_friends(local_user());
+               fb_get_friends(local_user(), true);
                info( t('Updating contacts') . EOL);
        }
 
@@ -537,13 +578,40 @@ function facebook_cron($a,$b) {
                        if($last_friend_check) 
                                $next_friend_check = $last_friend_check + 86400;
                        if($next_friend_check <= time()) {
-                               fb_get_friends($rr['uid']);
+                               fb_get_friends($rr['uid'], true);
                                set_pconfig($rr['uid'],'facebook','friend_check',time());
                        }
                        fb_consume_all($rr['uid']);
                }
-       }       
-
+       }
+       
+       if (get_config('facebook', 'realtime_active') == 1) {
+               if (!facebook_check_realtime_active()) {
+                       
+                       logger('facebook_cron: Facebook is not sending Real-Time Updates any more, although it is supposed to. Trying to fix it...', LOGGER_NORMAL);
+                       facebook_subscription_add_users();
+                       
+                       if (facebook_check_realtime_active()) 
+                               logger('facebook_cron: Successful', LOGGER_NORMAL);
+                       else {
+                               logger('facebook_cron: Failed', LOGGER_NORMAL);
+                               
+                               if(strlen($a->config['admin_email']) && !get_config('facebook', 'realtime_err_mailsent')) {
+                                       $res = mail($a->config['admin_email'], t('Problems with Facebook Real-Time Updates'), 
+                                               "Hi!\n\nThere's a problem with the Facebook Real-Time Updates that cannot be solved automatically. Maybe a permission issue?\n\nPlease try to re-activate it on " . $a->config["system"]["url"] . "/admin/plugins/facebook\n\nThis e-mail will only be sent once.",
+                                               'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
+                                               . 'Content-type: text/plain; charset=UTF-8' . "\n"
+                                               . 'Content-transfer-encoding: 8bit'
+                                       );
+                                       
+                                       set_config('facebook', 'realtime_err_mailsent', 1);
+                               }
+                       }
+               } else { // !facebook_check_realtime_active()
+                       del_config('facebook', 'realtime_err_mailsent');
+               }
+       }
+       
        set_config('facebook','last_poll', time());
 
 }
@@ -562,12 +630,7 @@ function facebook_plugin_settings(&$a,&$b) {
 
 function facebook_plugin_admin(&$a, &$o){
        
-       $activated = false;
-       $access_token = fb_get_app_access_token();
-       if ($access_token) {
-               $ret = facebook_subscriptions_get();
-               if (is_array($ret)) foreach ($ret as $re) if (is_object($re) && $re->object == "user") $activated = true;
-       }
+       $activated = facebook_check_realtime_active();
        if ($activated) {
                $o = t('Real-Time Updates are activated.') . '<br><br>';
                $o .= '<input type="submit" name="real_time_deactivate" value="' . t('Deactivate Real-Time Updates') . '">';
@@ -610,6 +673,7 @@ function facebook_post_hook(&$a,&$b) {
         */
 
        require_once('include/group.php');
+       require_once('include/html2plain.php');
 
        logger('Facebook post');
 
@@ -730,7 +794,7 @@ function facebook_post_hook(&$a,&$b) {
                                if($b['verb'] == ACTIVITY_DISLIKE)
                                        $msg = trim(strip_tags(bbcode($msg)));
 
-                               $search_str = $a->get_baseurl() . '/search';
+                               /*$search_str = $a->get_baseurl() . '/search';
 
                                if(preg_match("/\[url=(.*?)\](.*?)\[\/url\]/is",$msg,$matches)) {
 
@@ -759,25 +823,51 @@ function facebook_post_hook(&$a,&$b) {
                                if((strpos($link,z_root()) !== false) && (! $image))
                                        $image = $a->get_baseurl() . '/images/friendica-64.jpg';
 
-                               $msg = trim(strip_tags(bbcode($msg)));
+                               $msg = trim(strip_tags(bbcode($msg)));*/
+
+                               // Test
+
+                               // Looking for images
+                               if(preg_match("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/is",$b['body'],$matches))
+                                       $image = $matches[3];
+
+                               if(preg_match("/\[img\](.*?)\[\/img\]/is",$b['body'],$matches))
+                                       $image = $matches[1];
+
+                               $html = bbcode($b['body']);
+                               $msg = trim($b['title']." \n".html2plain($html, 0, true));
                                $msg = html_entity_decode($msg,ENT_QUOTES,'UTF-8');
 
+                               $toolong = false;
+
                                // add any attachments as text urls
 
-                           $arr = explode(',',$b['attach']);
+                               $arr = explode(',',$b['attach']);
 
-                           if(count($arr)) {
+                               if(count($arr)) {
                                        $msg .= "\n";
-                               foreach($arr as $r) {
-                               $matches = false;
+                                       foreach($arr as $r) {
+                                               $matches = false;
                                                $cnt = preg_match('|\[attach\]href=\"(.*?)\" size=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"\[\/attach\]|',$r,$matches);
                                                if($cnt) {
-                                                       $msg .= $matches[1];
+                                                       $msg .= "\n".$matches[1];
                                                }
                                        }
                                }
 
-                               if (strlen($msg) > FACEBOOK_MAXPOSTLEN) {
+                               // To-Do: look for bookmark-bbcode and handle it with priority
+
+                               $links = collecturls($html);
+                               if (sizeof($links) > 0) {
+                                       reset($links);
+                                       $link = current($links);
+                                       /*if (strlen($msg."\n".$link) <= FACEBOOK_MAXPOSTLEN)
+                                               $msg .= "\n".$link;
+                                       else
+                                               $toolong = true;*/
+                               }
+
+                               if ((strlen($msg) > FACEBOOK_MAXPOSTLEN) or $toolong) {
                                        $shortlink = "";
                                        require_once('library/slinky.php');
 
@@ -842,6 +932,7 @@ function facebook_post_hook(&$a,&$b) {
 
                                if(! get_config('facebook','test_mode')) {
                                        $x = post_url($url, $postvars);
+                                       logger('Facebook post returns: ' . $x, LOGGER_DEBUG);
 
                                        $retj = json_decode($x);
                                        if($retj->id) {
@@ -857,15 +948,45 @@ function facebook_post_hook(&$a,&$b) {
                                                        add_to_queue($a->contact,NETWORK_FACEBOOK,$s);
                                                        notice( t('Facebook post failed. Queued for retry.') . EOL);
                                                }
+                                               
+                                               if (isset($retj->error) && $retj->error->type == "OAuthException" && $retj->error->code == 190) {
+                                                       logger('Facebook session has expired due to changed password.', LOGGER_DEBUG);
+                                                       
+                                                       $last_notification = get_pconfig($b['uid'], 'facebook', 'session_expired_mailsent');
+                                                       if (!$last_notification || $last_notification < (time() - FACEBOOK_SESSION_ERR_NOTIFICATION_INTERVAL)) {
+                                                               require_once('include/enotify.php');
+                                                       
+                                                               $r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($b['uid']) );
+                                                               notification(array(
+                                                                       'uid' => $b['uid'],
+                                                                       'type' => NOTIFY_SYSTEM,
+                                                                       'system_type' => 'facebook_connection_invalid',
+                                                                       'language'     => $r[0]['language'],
+                                                                       'to_name'      => $r[0]['username'],
+                                                                       'to_email'     => $r[0]['email'],
+                                                                       'source_name'  => t('Administrator'),
+                                                                       'source_link'  => $a->config["system"]["url"],
+                                                                       'source_photo' => $a->config["system"]["url"] . '/images/person-80.jpg',
+                                                               ));
+                                                               
+                                                               set_pconfig($b['uid'], 'facebook', 'session_expired_mailsent', time());
+                                                       } else logger('Facebook: No notification, as the last one was sent on ' . $last_notification, LOGGER_DEBUG);
+                                               }
                                        }
-                                       
-                                       logger('Facebook post returns: ' . $x, LOGGER_DEBUG);
                                }
                        }
                }
        }
 }
 
+function facebook_enotify(&$app, &$data) {
+       if (x($data, 'params') && $data['params']['type'] == NOTIFY_SYSTEM && x($data['params'], 'system_type') && $data['params']['system_type'] == 'facebook_connection_invalid') {
+               $data['itemlink'] = '/facebook';
+               $data['epreamble'] = $data['preamble'] = t('Your Facebook connection became invalid. Please Re-authenticate.');
+               $data['subject'] = t('Facebook connection became invalid');
+               $data['body'] = sprintf( t("Hi %1\$s,\n\nThe connection between your accounts on %2\$s and Facebook became invalid. This usually happens after you change your Facebook-password. To enable the connection again, you have to %3\$sre-authenticate the Facebook-connector%4\$s."), $data['params']['to_name'], "[url=" . $app->config["system"]["url"] . "]" . $app->config["sitename"] . "[/url]", "[url=" . $app->config["system"]["url"] . "/facebook]", "[/url]");
+       }
+}
 
 function facebook_post_local(&$a,&$b) {
 
@@ -964,15 +1085,23 @@ function fb_consume_all($uid) {
                $s = fetch_url('https://graph.facebook.com/me/feed?access_token=' . $access_token);
                if($s) {
                        $j = json_decode($s);
-                       logger('fb_consume_stream: wall: ' . print_r($j,true), LOGGER_DATA);
-                       fb_consume_stream($uid,$j,($private_wall) ? false : true);
+                       if (isset($j->data)) {
+                               logger('fb_consume_stream: wall: ' . print_r($j,true), LOGGER_DATA);
+                               fb_consume_stream($uid,$j,($private_wall) ? false : true);
+                       } else {
+                               logger('fb_consume_stream: wall: got no data from Facebook: ' . print_r($j,true), LOGGER_NORMAL);
+                       }
                }
        }
        $s = fetch_url('https://graph.facebook.com/me/home?access_token=' . $access_token);
        if($s) {
                $j = json_decode($s);
-               logger('fb_consume_stream: feed: ' . print_r($j,true), LOGGER_DATA);
-               fb_consume_stream($uid,$j,false);
+               if (isset($j->data)) {
+                       logger('fb_consume_stream: feed: ' . print_r($j,true), LOGGER_DATA);
+                       fb_consume_stream($uid,$j,false);
+               } else {
+                       logger('fb_consume_stream: feed: got no data from Facebook: ' . print_r($j,true), LOGGER_NORMAL);
+               }
        }
 
 }
@@ -997,7 +1126,7 @@ function fb_consume_stream($uid,$j,$wall = false) {
        $a = get_app();
 
 
-       $user = q("SELECT `nickname`, `blockwall` FROM `user` WHERE `uid` = %d AND `account_expired` = 0 LIMIT 1",
+       $user = q("SELECT * FROM `user` WHERE `uid` = %d AND `account_expired` = 0 LIMIT 1",
                intval($uid)
        );
        if(! count($user))
@@ -1120,14 +1249,19 @@ function fb_consume_stream($uid,$j,$wall = false) {
 
                        if($entry->privacy && $entry->privacy->value !== 'EVERYONE') {
                                $datarray['private'] = 1;
-                               $datarray['allow_cid'] = '<' . $uid . '>';
+                               $datarray['allow_cid'] = '<' . $self[0]['id'] . '>';
                        }
-                       
+
+                       if(trim($datarray['body']) == '') {
+                               logger('facebook: empty body');
+                               continue;
+                       }
+
                        $top_item = item_store($datarray);
                        $r = q("SELECT * FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
                                intval($top_item),
                                intval($uid)
-                       );                      
+                       );
                        if(count($r)) {
                                $orig_post = $r[0];
                                logger('fb: new top level item posted');
@@ -1254,6 +1388,47 @@ function fb_consume_stream($uid,$j,$wall = false) {
                                $cmntdata['author-avatar'] = 'https://graph.facebook.com/' . $cmnt->from->id . '/picture';
                                $cmntdata['body'] = $cmnt->message;
                                $item = item_store($cmntdata);                  
+                               
+                               $myconv = q("SELECT `author-link`, `author-avatar`, `parent` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `parent` != 0 ",
+                                       dbesc($orig_post['uri']),
+                                       intval($uid)
+                               );
+
+                               if(count($myconv)) {
+                                       $importer_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
+
+                                       foreach($myconv as $conv) {
+
+                                               // now if we find a match, it means we're in this conversation
+       
+                                               if(! link_compare($conv['author-link'],$importer_url))
+                                                       continue;
+
+                                               require_once('include/enotify.php');
+                                                               
+                                               $conv_parent = $conv['parent'];
+
+                                               notification(array(
+                                                       'type'         => NOTIFY_COMMENT,
+                                                       'notify_flags' => $user[0]['notify-flags'],
+                                                       'language'     => $user[0]['language'],
+                                                       'to_name'      => $user[0]['username'],
+                                                       'to_email'     => $user[0]['email'],
+                                                       'uid'          => $user[0]['uid'],
+                                                       'item'         => $cmntdata,
+                                                       'link'             => $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $item,
+                                                       'source_name'  => $cmntdata['author-name'],
+                                                       'source_link'  => $cmntdata['author-link'],
+                                                       'source_photo' => $cmntdata['author-avatar'],
+                                                       'verb'         => ACTIVITY_POST,
+                                                       'otype'        => 'item',
+                                                       'parent'       => $conv_parent,
+                                               ));
+
+                                               // only send one notification
+                                               break;
+                                       }
+                               }
                        }
                }
        }
@@ -1300,7 +1475,9 @@ function facebook_subscription_del_users() {
        $access_token = fb_get_app_access_token();
        
        $url = "https://graph.facebook.com/" . get_config('facebook', 'appid'  ) . "/subscriptions?access_token=" . $access_token;
-       delete_url($url);
+       facebook_delete_url($url);
+       
+       del_config('facebook', 'realtime_active');
 }
 
 function facebook_subscription_add_users() {
@@ -1318,7 +1495,7 @@ function facebook_subscription_add_users() {
        
        $j = post_url($url,array(
                "object" => "user",
-               "fields" => "feed,friends,activities",
+               "fields" => "feed,friends",
                "callback_url" => $cb,
                "verify_token" => $verify_token,
        ));
@@ -1326,12 +1503,15 @@ function facebook_subscription_add_users() {
        
        if ($j) {
                logger("Facebook reponse: " . $j, LOGGER_DATA);
+               
+               if (facebook_check_realtime_active()) set_config('facebook', 'realtime_active', 1);
        };
 }
 
 function facebook_subscriptions_get() {
        
        $access_token = fb_get_app_access_token();
+       if (!$access_token) return null;
        
        $url = "https://graph.facebook.com/" . get_config('facebook', 'appid'  ) . "/subscriptions?access_token=" . $access_token;
        $j = fetch_url($url);
@@ -1344,15 +1524,20 @@ function facebook_subscriptions_get() {
 }
 
 
-
+function facebook_check_realtime_active() {
+       $ret = facebook_subscriptions_get();
+       if (is_null($ret)) return false;
+       if (is_array($ret)) foreach ($ret as $re) if (is_object($re) && $re->object == "user") return true;
+       return false;
+}
 
 
 
 
 // DELETE-request to $url
 
-if(! function_exists('delete_url')) {
-function delete_url($url,$headers = null, &$redirects = 0, $timeout = 0) {
+if(! function_exists('facebook_delete_url')) {
+function facebook_delete_url($url,$headers = null, &$redirects = 0, $timeout = 0) {
        $a = get_app();
        $ch = curl_init($url);
        if(($redirects > 8) || (! $ch)) 
@@ -1433,4 +1618,4 @@ function delete_url($url,$headers = null, &$redirects = 0, $timeout = 0) {
 
        curl_close($ch);
        return($body);
-}}
\ No newline at end of file
+}}