gnu-social/plugins/Facebook/FacebookPlugin.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Plugin to add a StatusNet Facebook application
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
define("FACEBOOK_CONNECT_SERVICE", 3);
define('FACEBOOKPLUGIN_VERSION', '0.9');
require_once INSTALLDIR . '/plugins/Facebook/facebookutil.php';
/**
* Facebook plugin to add a StatusNet Facebook application
*
* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
class FacebookPlugin extends Plugin
{
/**
* Add Facebook app actions to the router table
*
* Hook for RouterInitialized event.
*
* @param Net_URL_Mapper &$m path-to-action mapper
*
* @return boolean hook return
*/
function onStartInitializeRouter($m)
{
// Facebook App stuff
$m->connect('facebook/app', array('action' => 'facebookhome'));
$m->connect('facebook/app/index.php', array('action' => 'facebookhome'));
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$m->connect('facebook/app/settings.php',
array('action' => 'facebooksettings'));
$m->connect('facebook/app/invite.php', array('action' => 'facebookinvite'));
$m->connect('facebook/app/remove', array('action' => 'facebookremove'));
// Facebook Connect stuff
$m->connect('main/facebookconnect', array('action' => 'FBConnectAuth'));
$m->connect('main/facebooklogin', array('action' => 'FBConnectLogin'));
$m->connect('settings/facebook', array('action' => 'FBConnectSettings'));
$m->connect('xd_receiver.html', array('action' => 'FBC_XDReceiver'));
return true;
}
/**
* Automatically load the actions and libraries used by the Facebook app
*
* @param Class $cls the class
*
* @return boolean hook return
*
*/
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function onAutoload($cls)
{
switch ($cls) {
case 'FacebookAction':
case 'FacebookhomeAction':
case 'FacebookinviteAction':
case 'FacebookremoveAction':
case 'FacebooksettingsAction':
include_once INSTALLDIR . '/plugins/Facebook/' .
strtolower(mb_substr($cls, 0, -6)) . '.php';
return false;
case 'FBConnectAuthAction':
case 'FBConnectLoginAction':
case 'FBConnectSettingsAction':
case 'FBC_XDReceiverAction':
include_once INSTALLDIR . '/plugins/Facebook/' .
mb_substr($cls, 0, -6) . '.php';
return false;
case 'FBCLoginGroupNav':
include_once INSTALLDIR . '/plugins/Facebook/FBCLoginGroupNav.php';
return false;
case 'FBCSettingsNav':
include_once INSTALLDIR . '/plugins/Facebook/FBCSettingsNav.php';
return false;
default:
return true;
}
}
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/**
* Override normal HTML output to force the content type to
* text/html and add in xmlns:fb
*
* @param Action $action the current action
*
* @return void
*/
function onStartShowHTML($action)
{
if ($this->reqFbScripts($action)) {
// XXX: Horrible hack to make Safari, FF2, and Chrome work with
// Facebook Connect. These browser cannot use Facebook's
// DOM parsing routines unless the mime type of the page is
// text/html even though Facebook Connect uses XHTML. This is
// A bug in Facebook Connect, and this is a temporary solution
// until they fix their JavaScript libs.
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header('Content-Type: text/html');
$action->extraHeaders();
$action->startXML('html');
$language = $action->getLanguage();
$action->elementStart('html',
array('xmlns' => 'http://www.w3.org/1999/xhtml',
'xmlns:fb' => 'http://www.facebook.com/2008/fbml',
'xml:lang' => $language,
'lang' => $language));
return false;
} else {
return true;
}
}
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/**
* Add in the Facebook Connect JavaScript stuff
*
* Note: this script needs to appear in the <body>
*
* @param Action $action the current action
*
* @return void
*
*/
function onEndShowScripts($action)
{
if ($this->reqFbScripts($action)) {
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$apikey = common_config('facebook', 'apikey');
$plugin_path = common_path('plugins/Facebook');
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$login_url = common_local_url('FBConnectAuth');
$logout_url = common_local_url('logout');
// XXX: Facebook says we don't need this FB_RequireFeatures(),
// but we actually do, for IE and Safari. Gar.
$js .= ' $(document).ready(function () {';
$js .= ' FB_RequireFeatures(';
$js .= ' ["XFBML"], function() {';
$js .= ' FB.init("%1$s", "../xd_receiver.html");';
$js .= ' }';
$js .= ' );';
$js .= ' });';
$js .= ' function goto_login() {';
$js .= ' window.location = "%2$s";';
$js .= ' }';
// The below function alters the logout link so that it logs the user out
// of Facebook Connect as well as the site. However, for some pages
// (FB Connect Settings) we need to output the FB Connect scripts (to
// show an existing FB connection even if the user isn't authenticated
// with Facebook connect) but NOT alter the logout link. And the only
// way to reliably do that is with the FB Connect .js libs. Crazy.
$js .= ' FB.ensureInit(function() {';
$js .= ' FB.Connect.ifUserConnected(';
$js .= ' function() { ';
$js .= ' $(\'#nav_logout a\').attr(\'href\', \'#\');';
$js .= ' $(\'#nav_logout a\').click(function() {';
$js .= ' FB.Connect.logoutAndRedirect(\'%3$s\');';
$js .= ' return false;';
$js .= ' })';
$js .= ' },';
$js .= ' function() {';
$js .= ' return false;';
$js .= ' }';
$js .= ' );';
$js .= ' });';
$js = sprintf($js, $apikey, $login_url, $logout_url);
// Compress the bugger down a bit
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$js = str_replace(' ', '', $js);
$action->inlineScript($js);
}
}
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/**
* Add in an additional Facebook Connect script that's supposed to
* appear as close as possible to </body>
*
* @param Action $action the current action
*
* @return void
*
*/
function onEndShowFooter($action)
{
if ($this->reqFbScripts($action)) {
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$action->script('http://static.ak.connect.facebook.com' .
'/js/api_lib/v0.4/FeatureLoader.js.php');
}
}
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/**
* Output Facebook Connect specific CSS link
*
* @param Action $action the current action
*
* @return void
*
*/
function onEndShowStatusNetStyles($action)
{
if ($this->reqFbScripts($action)) {
$action->cssLink('plugins/Facebook/FBConnect.css');
}
}
/**
* Does the Action we're plugged into require the FB Scripts? We only
* want to output FB namespace, scripts, CSS, etc. on the pages that
* really need them.
*
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* @param Action $action the current action
*
* @return boolean true
*/
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function reqFbScripts($action)
{
// If you're logged in w/FB Connect, you always need the FB stuff
$fbuid = $this->loggedIn();
if (!empty($fbuid)) {
return true;
}
// List of actions that require FB stuff
$needy = array('FBConnectLoginAction',
'FBConnectauthAction',
'FBConnectSettingsAction');
if (in_array(get_class($action), $needy)) {
return true;
}
return false;
}
/**
* Is the user currently logged in with FB Connect?
*
* @return mixed $fbuid the Facebook ID of the logged in user, or null
*/
function loggedIn()
{
$user = common_current_user();
if (!empty($user)) {
$flink = Foreign_link::getByUserId($user->id,
FACEBOOK_CONNECT_SERVICE);
$fbuid = 0;
if (!empty($flink)) {
try {
$facebook = getFacebook();
$fbuid = $facebook->get_loggedin_user();
} catch (Exception $e) {
common_log(LOG_WARNING, 'Facebook Connect Plugin - ' .
'Problem getting Facebook user: ' .
$e->getMessage());
}
if ($fbuid > 0) {
return $fbuid;
}
}
}
return null;
}
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/**
* Add in a Facebook Connect avatar to the primary nav menu
*
* @param Action $action the current action
*
* @return void
*
*/
function onStartPrimaryNav($action)
{
$user = common_current_user();
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$connect = 'FBConnectSettings';
if (common_config('xmpp', 'enabled')) {
$connect = 'imsettings';
} else if (common_config('sms', 'enabled')) {
$connect = 'smssettings';
} else if (common_config('twitter', 'enabled')) {
$connect = 'twittersettings';
}
if (!empty($user)) {
$fbuid = $this->loggedIn();
if (!empty($fbuid)) {
/* Default FB silhouette pic for FB users who haven't
uploaded a profile pic yet. */
$silhouetteUrl =
'http://static.ak.fbcdn.net/pics/q_silhouette.gif';
$url = $this->getProfilePicURL($fbuid);
$action->elementStart('li', array('id' => 'nav_fb'));
$action->element('img', array('id' => 'fbc_profile-pic',
'src' => (!empty($url)) ? $url : $silhouetteUrl,
'alt' => 'Facebook Connect User',
'width' => '16'), '');
$iconurl = common_path('plugins/Facebook/fbfavicon.ico');
$action->element('img', array('id' => 'fb_favicon',
'src' => $iconurl));
$action->elementEnd('li');
}
}
return true;
}
/*
* Add a login tab for Facebook Connect
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*
* @param Action &action the current action
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*
* @return void
*/
function onEndLoginGroupNav(&$action)
{
$action_name = $action->trimmed('action');
$action->menuItem(common_local_url('FBConnectLogin'),
_m('Facebook'),
_m('Login or register using Facebook'),
'FBConnectLogin' === $action_name);
return true;
}
/*
* Add a tab for managing Facebook Connect settings
*
* @param Action &action the current action
*
* @return void
*/
function onEndConnectSettingsNav(&$action)
{
$action_name = $action->trimmed('action');
$action->menuItem(common_local_url('FBConnectSettings'),
_m('Facebook'),
_m('Facebook Connect Settings'),
$action_name === 'FBConnectSettings');
return true;
}
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/**
* Have the logout process do some Facebook Connect cookie cleanup
*
* @param Action $action the current action
*
* @return void
*/
function onStartLogout($action)
{
$action->logout();
$fbuid = $this->loggedIn();
if (!empty($fbuid)) {
try {
$facebook = getFacebook();
$facebook->expire_session();
} catch (Exception $e) {
common_log(LOG_WARNING, 'Facebook Connect Plugin - ' .
'Could\'t logout of Facebook: ' .
$e->getMessage());
}
}
return true;
}
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/**
* Get the URL of the user's Facebook avatar
*
* @param int $fbuid the Facebook user ID
*
* @return string $url the url for the user's Facebook avatar
*/
function getProfilePicURL($fbuid)
{
$facebook = getFacebook();
$url = null;
try {
$fqry = 'SELECT pic_square FROM user WHERE uid = %s';
$result = $facebook->api_client->fql_query(sprintf($fqry, $fbuid));
if (!empty($result)) {
$url = $result[0]['pic_square'];
}
} catch (Exception $e) {
common_log(LOG_WARNING, 'Facebook Connect Plugin - ' .
"Facebook client failure requesting profile pic!");
}
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return $url;
}
/**
* Add a Facebook queue item for each notice
*
* @param Notice $notice the notice
* @param array &$transports the list of transports (queues)
*
* @return boolean hook return
*/
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function onStartEnqueueNotice($notice, &$transports)
{
array_push($transports, 'facebook');
return true;
}
/**
* broadcast the message when not using queuehandler
*
* @param Notice &$notice the notice
* @param array $queue destination queue
*
* @return boolean hook return
*/
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function onUnqueueHandleNotice(&$notice, $queue)
{
if (($queue == 'facebook') && ($this->_isLocal($notice))) {
facebookBroadcastNotice($notice);
return false;
}
return true;
}
/**
* Determine whether the notice was locally created
*
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* @param Notice $notice the notice
*
* @return boolean locality
*/
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function _isLocal($notice)
{
return ($notice->is_local == Notice::LOCAL_PUBLIC ||
$notice->is_local == Notice::LOCAL_NONPUBLIC);
}
/**
* Add Facebook queuehandler to the list of daemons to start
*
* @param array $daemons the list fo daemons to run
*
* @return boolean hook return
*
*/
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function onGetValidDaemons($daemons)
{
array_push($daemons, INSTALLDIR .
'/plugins/Facebook/facebookqueuehandler.php');
return true;
}
function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'Facebook',
'version' => FACEBOOKPLUGIN_VERSION,
'author' => 'Zach Copley',
'homepage' => 'http://status.net/wiki/Plugin:Facebook',
'rawdescription' =>
_m('The Facebook plugin allows you to integrate ' .
'your StatusNet instance with ' .
'<a href="http://facebook.com/">Facebook</a> ' .
'and Facebook Connect.'));
return true;
}
}