Basic Facebook Connect plugin

1 files changed, 278 insertions, 0 deletions

diff --git a/plugins/FBConnect/FBConnectPlugin.php b/plugins/FBConnect/FBConnectPlugin.php
new file mode 100644
index 000000000..30532e5ec
--- /dev/null
+++ b/plugins/FBConnect/FBConnectPlugin.php
@@ -0,0 +1,278 @@
+<?php
+/**
+ * Laconica, the distributed open-source microblogging tool
+ *
+ * Plugin to enable Facebook Connect
+ *
+ * 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   Laconica
+ * @author    Zach Copley <zach@controlyourself.ca>
+ * @copyright 2009 Control Yourself, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://laconi.ca/
+ */
+
+if (!defined('LACONICA')) {
+    exit(1);
+}
+
+require_once INSTALLDIR . '/plugins/FBConnect/FBConnectLogin.php';
+require_once INSTALLDIR . '/lib/facebookutil.php';
+
+/**
+ * Plugin to enable Facebook Connect
+ *
+ * @category Plugin
+ * @package  Laconica
+ * @author   Zach Copley <zach@controlyourself.ca>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://laconi.ca/
+ */
+
+class FBConnectPlugin extends Plugin
+{
+
+    function __construct()
+    {
+        parent::__construct();
+    }
+
+    // Hook in new actions
+    function onRouterInitialized(&$m) {
+        $m->connect('main/facebookconnect', array('action' => 'fbconnectlogin'));
+     }
+
+    // Add in xmlns:fb
+    function onStartShowHTML($action)
+    {
+
+        // XXX: This is probably a bad place to do general processing
+        // so maybe I need to make some new events?  Maybe in
+        // Action::prepare?
+
+        $name = get_class($action);
+
+        common_debug("action: $name");
+
+        // Avoid a redirect loop
+        if ($name != 'FBConnectloginAction') {
+
+            $this->checkFacebookUser($action);
+
+        }
+
+        $httpaccept = isset($_SERVER['HTTP_ACCEPT']) ?
+        $_SERVER['HTTP_ACCEPT'] : null;
+
+        // XXX: allow content negotiation for RDF, RSS, or XRDS
+
+        $cp = common_accept_to_prefs($httpaccept);
+        $sp = common_accept_to_prefs(PAGE_TYPE_PREFS);
+
+        $type = common_negotiate_type($cp, $sp);
+
+        if (!$type) {
+            throw new ClientException(_('This page is not available in a '.
+                                         'media type you accept'), 406);
+        }
+
+
+        header('Content-Type: '.$type);
+
+        $action->extraHeaders();
+
+        $action->startXML('html',
+                         '-//W3C//DTD XHTML 1.0 Strict//EN',
+                         'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
+
+        $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'     => $language));
+
+        return false;
+
+    }
+
+    function onEndShowLaconicaScripts($action)
+    {
+
+        $action->element('script',
+            array('type' => 'text/javascript',
+                  'src'  => 'http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php'),
+                  ' ');
+
+        $apikey = common_config('facebook', 'apikey');
+        $plugin_path = common_path('plugins/FBConnect');
+
+        $login_url = common_get_returnto() || common_local_url('public');
+
+        $html = sprintf('<script type="text/javascript">FB.init("%s", "%s/xd_receiver.htm");
+
+                            function refresh_page() {
+                                window.location = "%s";
+                            }
+
+                         </script>', $apikey, $plugin_path, $login_url);
+
+
+        $action->raw($html);
+    }
+
+    function onStartPrimaryNav($action)
+    {
+        $user = common_current_user();
+
+        if ($user) {
+             $action->menuItem(common_local_url('all', array('nickname' => $user->nickname)),
+                             _('Home'), _('Personal profile and friends timeline'), false, 'nav_home');
+             $action->menuItem(common_local_url('profilesettings'),
+                             _('Account'), _('Change your email, avatar, password, profile'), false, 'nav_account');
+             if (common_config('xmpp', 'enabled')) {
+                 $action->menuItem(common_local_url('imsettings'),
+                                 _('Connect'), _('Connect to IM, SMS, Twitter'), false, 'nav_connect');
+             } else {
+                 $action->menuItem(common_local_url('smssettings'),
+                                 _('Connect'), _('Connect to SMS, Twitter'), false, 'nav_connect');
+             }
+             $action->menuItem(common_local_url('invite'),
+                              _('Invite'),
+                              sprintf(_('Invite friends and colleagues to join you on %s'),
+                              common_config('site', 'name')),
+                              false, 'nav_invitecontact');
+
+             // Need to override the Logout link to make it do FB stuff
+
+             $logout_url = common_local_url('logout');
+             $title =  _('Logout from the site');
+             $text = _('Logout');
+
+             $html = sprintf('<li id="nav_logout"><a href="%s" title="%s" ' .
+                 'onclick="FB.Connect.logoutAndRedirect(\'%s\')">%s</a></li>',
+                    $logout_url, $title, $logout_url, $text);
+
+             $action->raw($html);
+
+         }
+         else {
+             if (!common_config('site', 'closed')) {
+                 $action->menuItem(common_local_url('register'),
+                                 _('Register'), _('Create an account'), false, 'nav_register');
+             }
+             $action->menuItem(common_local_url('openidlogin'),
+                             _('OpenID'), _('Login with OpenID'), false, 'nav_openid');
+             $action->menuItem(common_local_url('login'),
+                             _('Login'), _('Login to the site'), false, 'nav_login');
+         }
+
+         $action->menuItem(common_local_url('doc', array('title' => 'help')),
+                         _('Help'), _('Help me!'), false, 'nav_help');
+         $action->menuItem(common_local_url('peoplesearch'),
+                         _('Search'), _('Search for people or text'), false, 'nav_search');
+
+        // Tack on "Connect with Facebook" button
+
+        // XXX: Maybe this looks bad and should not go here.  Where should it go?
+
+        if (!$user) {
+             $action->elementStart('li');
+             $action->element('fb:login-button', array('onlogin' => 'refresh_page()',
+                 'length' => 'long'));
+             $action->elementEnd('li');
+        }
+
+        return false;
+    }
+
+    function checkFacebookUser() {
+
+        try {
+
+            $facebook = getFacebook();
+            $fbuid = $facebook->get_loggedin_user();
+            $user = common_current_user();
+
+            // If you're a Facebook user and you're logged in do nothing
+
+            // If you're a Facebook user and you're not logged in
+            // redirect to Facebook connect login page because that means you have clicked
+            // the 'connect with Facebook' button and have cookies
+
+            if ($fbuid > 0) {
+
+                if ($facebook->api_client->users_isAppUser($fbuid) ||
+                    $facebook->api_client->added) {
+
+                    // user should be connected...
+
+                    common_debug("Facebook user found: $fbuid");
+
+                    if ($user) {
+                        common_debug("Facebook user is logged in.");
+                        return;
+
+                    } else {
+                        common_debug("Facebook user is NOT logged in.");
+                        common_redirect(common_local_url('fbconnectlogin'), 303);
+                    }
+
+                } else {
+                    common_debug("No Facebook connect user found.");
+                }
+            }
+
+        } catch (Exception $e) {
+            common_debug('Expired FB session.');
+        }
+
+    }
+
+    function onStartLogout($action)
+    {
+        common_debug("onEndLogout()");
+
+        common_set_user(null);
+        common_real_login(false); // not logged in
+        common_forgetme(); // don't log back in!
+
+        try {
+
+            $facebook = getFacebook();
+            $fbuid = $facebook->get_loggedin_user();
+
+            // XXX: ARGGGH this doesn't work right!
+
+            if ($fbuid) {
+                $facebook->expire_session();
+                $facebook->logout(common_local_url('public'));
+              }
+
+        } catch (Exception $e) {
+            common_debug('Problem expiring FB session');
+        }
+
+        common_debug("logged out.");
+
+        return false;
+    }
+
+}
+
+