fixed white screen on install

app/facebook/Services/README

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+PEAR package for interfacing with Facebook's API.

app/facebook/Services/Services/Facebook.php

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+<?php
+
+/**
+ * PHP5 interface for Facebook's REST API
+ *
+ * PHP version 5.1.0+
+ *
+ * LICENSE: This source file is subject to the New BSD license that is 
+ * available through the world-wide-web at the following URI:
+ * http://www.opensource.org/licenses/bsd-license.php. If you did not receive  
+ * a copy of the New BSD License and are unable to obtain it through the web, 
+ * please send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category  Services
+ * @package   Services_Facebook
+ * @author    Joe Stump <joe@joestump.net> 
+ * @copyright 2007-2008 Joe Stump <joe@joestump.net>  
+ * @license   http://www.opensource.org/licenses/bsd-license.php New BSD License
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/Services_Facebook
+ */
+
+require_once 'Services/Facebook/Common.php';
+require_once 'Services/Facebook/Exception.php';
+
+/**
+ * Services_Facebook
+ *
+ * @category Services
+ * @package  Services_Facebook
+ * @author   Joe Stump <joe@joestump.net>
+ * @license  http://www.opensource.org/licenses/bsd-license.php New BSD License
+ * @version  Release: @package_version@
+ * @link     http://wiki.developers.facebook.com
+ */
+class Services_Facebook
+{
+    /**
+     * Facebook API URL
+     *
+     * @var string $apiURL URL that that API calls will be sent to
+     * @static
+     */
+    static public $apiURL = 'http://api.new.facebook.com/restserver.php';
+
+    /**
+     * Facebok application API key 
+     *
+     * @var string $apiKey 32 character api_key from Facebook
+     * @static
+     */
+    static public $apiKey = '';
+
+    /**
+     * Facebok application secret 
+     *
+     * The Facebook secret token is used to both sign requests sent to 
+     * Facebook and to verify requests sent from Facebook to your application.
+     *
+     * @var string $secret 32 character secret from Facebook
+     * @static
+     */
+    static public $secret = '';
+
+    /**
+     * Timeout  
+     * 
+     * The amount in seconds for the curl http request timeout
+     *
+     * @var string $timeout Time in seconds for a request to timeout
+     * @static
+     */
+    static public $timeout = 30;
+
+    /**
+     * Currently logged in user
+     * 
+     * @var string $sessionKey
+     */
+    public $sessionKey = '';
+
+    /**
+     * Instances of various drivers
+     *
+     * @var array $instances
+     */
+    static protected $instances = array();
+
+    /**
+     * Instance of Services_Facebook
+     *
+     * @var Services_Facebook $instance
+     * @see Services_Facebook::singleton();
+     */
+    static protected $instance;
+
+    /**
+     * Available drivers
+     *
+     * @var array $drivers
+     */
+    static protected $drivers = array(
+        'admin'         => 'Admin',
+        'application'   => 'Application',
+        'auth'          => 'Auth',
+        'connect'       => 'Connect',
+        'data'          => 'Data',
+        'events'        => 'Events',
+        'fbml'          => 'FBML',
+        'fql'           => 'FQL',
+        'feed'          => 'Feed',
+        'friends'       => 'Friends',
+        'groups'        => 'Friends',
+        'marketplace'   => 'MarketPlace',
+        'notifications' => 'Notifications',
+        'pages'         => 'Pages',
+        'photos'        => 'Photos',
+        'profile'       => 'Profile',
+        'share'         => 'Share',
+        'users'         => 'Users'
+    );
+
+    /**
+     * Create a facebook service 
+     *
+     * @param string $endPoint Services to create
+     * 
+     * @return object Instance of Facebook endpoint
+     * @throws Services_Facebook_Exception
+     */
+    static protected function factory($endPoint)
+    {
+        $file = 'Services/Facebook/' . $endPoint . '.php';
+        include_once $file;
+        $class = 'Services_Facebook_' . $endPoint;
+        if (!class_exists($class)) {
+            throw new Services_Facebook_Exception('Class not found ' . $class);
+        } 
+
+        $instance = new $class();
+        return $instance;
+    }
+
+    /**
+     * Singleton 
+     * 
+     * @return Services_Facebook
+     */
+    static public function singleton()
+    {
+        if (self::$instance !== null) {
+            return self::$instance;
+        }
+
+        $instance = new Services_Facebook();
+        self::$instance = $instance;
+
+        return $instance;
+    }
+
+    /**
+     * Lazy loader for Facebook drivers
+     *
+     * @param string $driver The Facebook driver/endpoint to load
+     * 
+     * @throws Services_Facebook_Exception
+     * @return object
+     */
+    public function __get($driver)
+    {
+        $driver = strtolower($driver);
+        if (!isset(self::$drivers[$driver])) {
+            throw new Services_Facebook_Exception(
+                'The driver requested, ' . $driver . ', is not supported'
+            );
+        } else {
+            $driver = self::$drivers[$driver];
+        }
+
+        if (isset(self::$instances[$driver])) {
+            return self::$instances[$driver];
+        } 
+
+        self::$instances[$driver] = self::factory($driver);
+        self::$instances[$driver]->sessionKey = $this->sessionKey;
+        return self::$instances[$driver];
+    }
+
+    /**
+     * Validates requests from Facebook
+     *
+     * Facebook sends a series of $_POST variables when it requests a canvas
+     * page or sends a user to the post removal URL. This function validates
+     * that request came from Facebook. This function returns true if the 
+     * request came from Facebook.
+     * 
+     * Both the signature of the request and the api_key is verified. If the
+     * api_key given doesn't match up to the current Services_Facebook::$apiKey
+     * then it will return false. 
+     *
+     * @param array $args Normally the $_POST array
+     *
+     * @return boolean True if the request signature is valid
+     */
+    static public function isValidRequest($args)
+    {
+        if ($args['fb_sig_api_key'] != Services_Facebook::$apiKey) {
+            return false;
+        }
+
+        ksort($args);
+
+        $sig = '';
+        foreach ($args as $k => $v) {
+            if ($k == 'fb_sig') {
+                continue;
+            }
+
+            // The signature is based on fb_sig_* fields only. Extra POST
+            // args are passed along, but don't alter the signature.
+            if (preg_match('/^fb_sig_/', $k)) {
+                $sig .= substr($k, 7) . '=' . $v;
+            }
+        }        
+
+        return (md5($sig . Services_Facebook::$secret) == $args['fb_sig']); 
+    }
+}
+
+?>

app/facebook/Services/Services/Facebook/Admin.php

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+<?php
+
+/**
+ * PHP5 interface for Facebook's REST API
+ *
+ * PHP version 5.1.0+
+ *
+ * LICENSE: This source file is subject to the New BSD license that is 
+ * available through the world-wide-web at the following URI:
+ * http://www.opensource.org/licenses/bsd-license.php. If you did not receive  
+ * a copy of the New BSD License and are unable to obtain it through the web, 
+ * please send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category  Services
+ * @package   Services_Facebook
+ * @author    Joe Stump <joe@joestump.net> 
+ * @copyright 2007-2008 Joe Stump <joe@joestump.net>  
+ * @license   http://www.opensource.org/licenses/bsd-license.php New BSD License
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/Services_Facebook
+ */
+
+
+/**
+ * Facebook Admin Interface
+ *
+ * <code>
+ * <?php
+ * require_once 'Services/Facebook.php';
+ * $api = new Services_Facebook();
+ * echo 'Notifications that we can send per day, behalf 
+ *       of a user: ' . $api->admin->getNotificationsPerDay() . '<br />';
+ * echo 'Requests that we can send per day, behalf of a user: ' . 
+ *       $api->admin->getRequestsPerDay(). '<br />';
+ * ?>
+ * </code>
+ *
+ * @category Services
+ * @package  Services_Facebook
+ * @author   Jeff Hodsdon <jeffhodsdon@gmail.com>
+ * @license  http://www.opensource.org/licenses/bsd-license.php New BSD License
+ * @version  Release: @package_version@
+ * @link     http://wiki.developers.facebook.com
+ */
+class Services_Facebook_Admin extends Services_Facebook_Common
+{
+    /**
+     * Default application property fields
+     * 
+     * @link http://wiki.developers.facebook.com/index.php/ApplicationProperties
+     */
+    protected $applicationFields = array(
+        'application_name', 'callback_url', 'post_install_url', 'edit_url', 
+        'dashboard_url', 'uninstall_url', 'ip_list', 'email', 'description', 
+        'use_iframe', 'desktop', 'is_mobile', 'default_fbml', 'default_column', 
+        'message_url', 'message_action', 'about_url', 'private_install',
+        'installable', 'privacy_url', 'help_url', 'see_all_url', 'tos_url',
+        'dev_mode', 'preload_fql'
+    );
+
+    /**
+     * Gets property values previously set for an application.
+     *
+     * @param array $properties The properties to get, default is all
+     *
+     * @return array Array with all requested properties
+     *
+     * @link http://wiki.developers.facebook.com/index.php/Admin.getAppProperties
+     */
+    public function getAppProperties($properties = array())
+    {
+        if (!count($properties)) {
+            $properties = $this->applicationFields;
+        }
+
+        //FB accepts the app properties as a json array
+        $jsonProperties = json_encode($properties);
+
+        $result = $this->callMethod('admin.getAppProperties', array(
+                                     'properties' => $jsonProperties
+                        ));
+
+        //The response from Facebook is in JSON
+        return json_decode((string)$result);
+    }
+
+    /**
+     * Sets multiple properties for an application.
+     *
+     * @param array $properties Property / value assocative array of properties
+     *
+     * @return boolean True on success
+     *
+     * @link http://wiki.developers.facebook.com/index.php/Admin.setAppProperties
+     */
+    public function setAppProperties($properties = array())
+    {
+        $jsonArray = array();
+        foreach ($properties as $property => $value) {
+            if (in_array($property, $this->applicationFields)) {
+                $jsonArray[$property] = $value;
+            }
+        }
+        $jsonProperties = json_encode($jsonArray);
+
+        $result = $this->callMethod('admin.setAppProperties', array(
+                                   'properties' => $jsonProperties
+                    ));
+
+        return (intval((string) $result) == 1);
+    }
+
+
+    /**
+     * Get the number of notifications your application can send on
+     * behalf of a user per day.
+     *
+     * @return int Number of notifications
+     *
+     * @link http://wiki.developers.facebook.com/index.php/Admin.getAllocation
+     */
+    public function getNotificationsPerDay()
+    {
+        return (int)$this->callMethod('admin.getAllocation', array(
+                                  'session_key' => $this->sessionKey,
+                                  'integration_point_name' => 'notifications_per_day'
+                ));
+    }
+
+    /**
+     * Get the number of requests your application can send on behalf 
+     * of a user per day.
+     *
+     * @return int Number of requests
+     *
+     * @link http://wiki.developers.facebook.com/index.php/Admin.getAllocation
+     **/
+    public function getRequestsPerDay()
+    {
+        return (int)$this->callMethod('admin.getAllocation', array(
+                                  'session_key' => $this->sessionKey,
+                                  'integration_point_name' => 'requests_per_day'
+                ));
+    }
+
+}