plugins/FBConnect/FBConnectPlugin.php

   1 <?php
   2 /**
   3  * Laconica, the distributed open-source microblogging tool
   4  *
   5  * Plugin to enable Facebook Connect
   6  *
   7  * PHP version 5
   8  *
   9  * LICENCE: This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU Affero General Public License as published by
  11  * the Free Software Foundation, either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU Affero General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Affero General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  *
  22  * @category  Plugin
  23  * @package   Laconica
  24  * @author    Zach Copley <zach@controlyourself.ca>
  25  * @copyright 2009 Control Yourself, Inc.
  26  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  27  * @link      http://laconi.ca/
  28  */
  29
  30 if (!defined('LACONICA')) {
  31     exit(1);
  32 }
  33
  34 define("FACEBOOK_CONNECT_SERVICE", 3);
  35
  36 require_once INSTALLDIR . '/lib/facebookutil.php';
  37 require_once INSTALLDIR . '/plugins/FBConnect/FBConnectAuth.php';
  38 require_once INSTALLDIR . '/plugins/FBConnect/FBConnectLogin.php';
  39 require_once INSTALLDIR . '/plugins/FBConnect/FBConnectSettings.php';
  40 require_once INSTALLDIR . '/plugins/FBConnect/FBCLoginGroupNav.php';
  41 require_once INSTALLDIR . '/plugins/FBConnect/FBCSettingsNav.php';
  42 require_once INSTALLDIR . '/plugins/FBConnect/FBC_XDReceiver.php';
  43
  44 /**
  45  * Plugin to enable Facebook Connect
  46  *
  47  * @category Plugin
  48  * @package  Laconica
  49  * @author   Zach Copley <zach@controlyourself.ca>
  50  * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  51  * @link     http://laconi.ca/
  52  */
  53
  54 class FBConnectPlugin extends Plugin
  55 {
  56     function __construct()
  57     {
  58         parent::__construct();
  59     }
  60
  61     // Hook in new actions
  62     function onRouterInitialized(&$m) {
  63         $m->connect('main/facebookconnect', array('action' => 'FBConnectAuth'));
  64         $m->connect('main/facebooklogin', array('action' => 'FBConnectLogin'));
  65         $m->connect('settings/facebook', array('action' => 'FBConnectSettings'));
  66         $m->connect('xd_receiver.html', array('action' => 'FBC_XDReceiver'));
  67      }
  68
  69     // Add in xmlns:fb
  70     function onStartShowHTML($action)
  71     {
  72
  73         if ($this->requiresFB($action)) {
  74
  75             // XXX: Horrible hack to make Safari, FF2, and Chrome work with
  76             // Facebook Connect. These browser cannot use Facebook's
  77             // DOM parsing routines unless the mime type of the page is
  78             // text/html even though Facebook Connect uses XHTML.  This is
  79             // A bug in Facebook Connect, and this is a temporary solution
  80             // until they fix their JavaScript libs.
  81             header('Content-Type: text/html');
  82
  83             $action->extraHeaders();
  84
  85             $action->startXML('html',
  86                 '-//W3C//DTD XHTML 1.0 Strict//EN',
  87                 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
  88
  89             $language = $action->getLanguage();
  90
  91             $action->elementStart('html',
  92                 array('xmlns'  => 'http://www.w3.org/1999/xhtml',
  93                       'xmlns:fb' => 'http://www.facebook.com/2008/fbml',
  94                       'xml:lang' => $language,
  95                       'lang'     => $language));
  96
  97             return false;
  98
  99         } else {
 100
 101             return true;
 102         }
 103     }
 104
 105     // Note: this script needs to appear in the <body>
 106
 107     function onStartShowHeader($action)
 108     {
 109         if ($this->requiresFB($action)) {
 110
 111             $apikey = common_config('facebook', 'apikey');
 112             $plugin_path = common_path('plugins/FBConnect');
 113
 114             $login_url = common_local_url('FBConnectAuth');
 115             $logout_url = common_local_url('logout');
 116
 117             // XXX: Facebook says we don't need this FB_RequireFeatures(),
 118             // but we actually do, for IE and Safari. Gar.
 119
 120             $html = sprintf('<script type="text/javascript">
 121                                 window.onload = function () {
 122                                     FB_RequireFeatures(
 123                                         ["XFBML"],
 124                                             function() {
 125                                                 FB.Facebook.init("%s", "../xd_receiver.html");
 126                                             }
 127                                         ); }
 128
 129                                 function goto_login() {
 130                                     window.location = "%s";
 131                                 }
 132
 133                                 function goto_logout() {
 134                                     window.location = "%s";
 135                                 }
 136                               </script>', $apikey,
 137                                   $login_url, $logout_url);
 138
 139             $action->raw($html);
 140         }
 141
 142     }
 143
 144     // Note: this script needs to appear as close as possible to </body>
 145
 146     function onEndShowFooter($action)
 147     {
 148         if ($this->requiresFB($action)) {
 149
 150             $action->element('script',
 151                 array('type' => 'text/javascript',
 152                       'src'  => 'http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php'),
 153                       '');
 154         }
 155     }
 156
 157     function onEndShowLaconicaStyles($action)
 158     {
 159
 160         if ($this->requiresFB($action)) {
 161
 162             $action->element('link', array('rel' => 'stylesheet',
 163                 'type' => 'text/css',
 164                 'href' => common_path('plugins/FBConnect/FBConnectPlugin.css')));
 165         }
 166     }
 167
 168     /**
 169      * Does the Action we're plugged into require the FB Scripts?  We only
 170      * want to output FB namespace, scripts, CSS, etc. on the pages that
 171      * really need them.
 172      *
 173      * @param Action the action in question
 174      *
 175      * @return boolean true
 176      */
 177
 178     function requiresFB($action) {
 179
 180         // If you're logged in w/FB Connect, you always need the FB stuff
 181
 182         $fbuid = $this->loggedIn();
 183
 184         if (!empty($fbuid)) {
 185             return true;
 186         }
 187
 188         // List of actions that require FB stuff
 189
 190         $needy = array('FBConnectLoginAction',
 191                        'FBConnectauthAction',
 192                        'FBConnectSettingsAction');
 193
 194         if (in_array(get_class($action), $needy)) {
 195             return true;
 196         }
 197
 198         return false;
 199
 200     }
 201
 202     /**
 203      * Is the user currently logged in with FB Connect?
 204      *
 205      * @return mixed $fbuid the Facebook ID of the logged in user, or null
 206      */
 207
 208     function loggedIn()
 209     {
 210         $user = common_current_user();
 211
 212         if (!empty($user)) {
 213
 214             $flink = Foreign_link::getByUserId($user->id,
 215                 FACEBOOK_CONNECT_SERVICE);
 216             $fbuid = 0;
 217
 218             if (!empty($flink)) {
 219
 220                 try {
 221
 222                     $facebook = getFacebook();
 223                     $fbuid = getFacebook()->get_loggedin_user();
 224
 225                 } catch (Exception $e) {
 226                     common_log(LOG_WARNING,
 227                         'Problem getting Facebook client: ' .
 228                             $e->getMessage());
 229                 }
 230
 231                 if ($fbuid > 0) {
 232                     return $fbuid;
 233                 }
 234             }
 235         }
 236
 237         return null;
 238     }
 239
 240     function onStartPrimaryNav($action)
 241     {
 242
 243         $user = common_current_user();
 244
 245         if (!empty($user)) {
 246
 247             $fbuid = $this->loggedIn();
 248
 249             if (!empty($fbuid)) {
 250
 251                 $action->elementStart('li', array('id' => 'nav_fb'));
 252                 $action->elementStart('fb:profile-pic', array('uid' => $fbuid,
 253                     'linked' => 'false',
 254                     'width' => 16,
 255                     'height' => 16));
 256                 $action->elementEnd('fb:profile-pic');
 257
 258                 $iconurl =  common_path('/plugins/FBConnect/fbfavicon.ico');
 259                 $action->element('img', array('src' => $iconurl));
 260
 261                 $action->elementEnd('li');
 262
 263             }
 264
 265             $action->menuItem(common_local_url('all', array('nickname' => $user->nickname)),
 266                 _('Home'), _('Personal profile and friends timeline'), false, 'nav_home');
 267             $action->menuItem(common_local_url('profilesettings'),
 268                 _('Account'), _('Change your email, avatar, password, profile'), false, 'nav_account');
 269             if (common_config('xmpp', 'enabled')) {
 270                 $action->menuItem(common_local_url('imsettings'),
 271                     _('Connect'), _('Connect to IM, SMS, Twitter'), false, 'nav_connect');
 272             } else {
 273              $action->menuItem(common_local_url('smssettings'),
 274                  _('Connect'), _('Connect to SMS, Twitter'), false, 'nav_connect');
 275             }
 276             if (common_config('invite', 'enabled')) {
 277                 $action->menuItem(common_local_url('invite'),
 278                     _('Invite'),
 279                     sprintf(_('Invite friends and colleagues to join you on %s'),
 280                     common_config('site', 'name')),
 281                     false, 'nav_invitecontact');
 282             }
 283
 284             // Need to override the Logout link to make it do FB stuff
 285             if (!empty($fbuid)) {
 286
 287                 $logout_url = common_local_url('logout');
 288                 $title =  _('Logout from the site');
 289                 $text = _('Logout');
 290
 291                 $html = sprintf('<li id="nav_logout"><a href="%s" title="%s" ' .
 292                     'onclick="FB.Connect.logout(function() { goto_logout() })">%s</a></li>',
 293                     $logout_url, $title, $text);
 294
 295                 $action->raw($html);
 296
 297              } else {
 298                  $action->menuItem(common_local_url('logout'),
 299                      _('Logout'), _('Logout from the site'), false, 'nav_logout');
 300              }
 301          }
 302          else {
 303              if (!common_config('site', 'closed')) {
 304                  $action->menuItem(common_local_url('register'),
 305                      _('Register'), _('Create an account'), false, 'nav_register');
 306              }
 307              $action->menuItem(common_local_url('openidlogin'),
 308                  _('OpenID'), _('Login with OpenID'), false, 'nav_openid');
 309              $action->menuItem(common_local_url('login'),
 310                  _('Login'), _('Login to the site'), false, 'nav_login');
 311          }
 312
 313          $action->menuItem(common_local_url('doc', array('title' => 'help')),
 314              _('Help'), _('Help me!'), false, 'nav_help');
 315          $action->menuItem(common_local_url('peoplesearch'),
 316              _('Search'), _('Search for people or text'), false, 'nav_search');
 317
 318         return false;
 319     }
 320
 321     function onStartShowLocalNavBlock($action)
 322     {
 323         $action_name = get_class($action);
 324
 325         $login_actions = array('LoginAction', 'RegisterAction',
 326             'OpenidloginAction', 'FBConnectLoginAction');
 327
 328         if (in_array($action_name, $login_actions)) {
 329             $nav = new FBCLoginGroupNav($action);
 330             $nav->show();
 331             return false;
 332         }
 333
 334         $connect_actions = array('SmssettingsAction', 'ImsettingsAction',
 335             'TwittersettingsAction', 'FBConnectSettingsAction');
 336
 337         if (in_array($action_name, $connect_actions)) {
 338             $nav = new FBCSettingsNav($action);
 339             $nav->show();
 340             return false;
 341         }
 342
 343         return true;
 344     }
 345
 346     function onStartLogout($action)
 347     {
 348         $action->logout();
 349         $fbuid = $this->loggedIn();
 350
 351         if (!empty($fbuid)) {
 352             try {
 353                 $facebook = getFacebook();
 354                 $facebook->expire_session();
 355             } catch (Exception $e) {
 356                 common_log(LOG_WARNING, 'Could\'t logout of Facebook: ' .
 357                     $e->getMessage());
 358             }
 359         }
 360
 361         return true;
 362     }
 363
 364 }