External login : facebook module

main/auth/external_login/facebook-php-sdk/src/facebook.php

@@ -0,0 +1,93 @@
+<?php
+/**
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+require_once "base_facebook.php";
+
+/**
+ * Extends the BaseFacebook class with the intent of using
+ * PHP sessions to store user ids and access tokens.
+ */
+class Facebook extends BaseFacebook
+{
+  /**
+   * Identical to the parent constructor, except that
+   * we start a PHP session to store the user ID and
+   * access token if during the course of execution
+   * we discover them.
+   *
+   * @param Array $config the application configuration.
+   * @see BaseFacebook::__construct in facebook.php
+   */
+  public function __construct($config) {
+    if (!session_id()) {
+      session_start();
+    }
+    parent::__construct($config);
+  }
+
+  protected static $kSupportedKeys =
+    array('state', 'code', 'access_token', 'user_id');
+
+  /**
+   * Provides the implementations of the inherited abstract
+   * methods.  The implementation uses PHP sessions to maintain
+   * a store for authorization codes, user ids, CSRF states, and
+   * access tokens.
+   */
+  protected function setPersistentData($key, $value) {
+    if (!in_array($key, self::$kSupportedKeys)) {
+      self::errorLog('Unsupported key passed to setPersistentData.');
+      return;
+    }
+
+    $session_var_name = $this->constructSessionVariableName($key);
+    $_SESSION[$session_var_name] = $value;
+  }
+
+  protected function getPersistentData($key, $default = false) {
+    if (!in_array($key, self::$kSupportedKeys)) {
+      self::errorLog('Unsupported key passed to getPersistentData.');
+      return $default;
+    }
+
+    $session_var_name = $this->constructSessionVariableName($key);
+    return isset($_SESSION[$session_var_name]) ?
+      $_SESSION[$session_var_name] : $default;
+  }
+
+  protected function clearPersistentData($key) {
+    if (!in_array($key, self::$kSupportedKeys)) {
+      self::errorLog('Unsupported key passed to clearPersistentData.');
+      return;
+    }
+
+    $session_var_name = $this->constructSessionVariableName($key);
+    unset($_SESSION[$session_var_name]);
+  }
+
+  protected function clearAllPersistentData() {
+    foreach (self::$kSupportedKeys as $key) {
+      $this->clearPersistentData($key);
+    }
+  }
+
+  protected function constructSessionVariableName($key) {
+    return implode('_', array('fb',
+                              $this->getAppId(),
+                              $key));
+  }
+}

main/auth/external_login/facebook-php-sdk/src/fb_ca_chain_bundle.crt

@@ -0,0 +1,121 @@
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main/auth/external_login/facebook.conf.php

@@ -0,0 +1,35 @@
+<?php 
+/**
+ * Licence: GPL
+ * Please contact CBlue regarding any licences issues.
+ * Author: noel@cblue.be
+ *  Copyright: CBlue SPRL, 20XX
+ *
+ * External login module : FACEBOOK
+ *
+ * Configuration file 
+ * Please edit this file to match with your FACEBOOK settings
+ **/
+
+/** 
+ * Facebook application setting
+ **/
+require_once dirname(__FILE__).'/facebook-php-sdk/src/facebook.php';
+
+global $facebook_config; 
+/** 
+ * Decomment those lines and put your facebook app parameters here
+ * Find them here : https://developers.facebook.com/apps/
+ **/
+/*$facebook_config = array('appId'=> 'APPID',
+		'secret' => 'secret app',
+		'return_url' => api_get_path(WEB_PATH).'?action=fbconnect');
+ */
+
+global $facebook;
+$facebook = new Facebook(array(
+			'appId'  => $facebook_config['appId'],
+			'secret' => $facebook_config['secret']
+			));
+require_once dirname(__FILE__).'/facebook.inc.php';
+?>

main/auth/external_login/facebook.inc.php

@@ -0,0 +1,93 @@
+<?php
+/**
+ * Licence: GPL
+ * Please contact CBlue regarding any licences issues.
+ * Author: noel@cblue.be
+ *  Copyright: CBlue SPRL, 20XX
+ *
+ * External login module : FACEBOOK
+ *
+ * This files provides the facebook_connect()  and facebook_get_url functions
+ * Please edit the facebook.conf.php file to adapt it to your fb application parameter
+ **/
+require_once dirname(__FILE__).'/../../inc/global.inc.php';
+require_once dirname(__FILE__).'/facebook.conf.php';
+require_once dirname(__FILE__).'/facebook-php-sdk/src/facebook.php';
+require_once dirname(__FILE__).'/functions.inc.php';
+
+/** 
+  * This function connect to facebook and retrieves the user info
+  * If user does not exist in chamilo, it creates it and logs in
+  * If user already exists, it updates his info
+**/
+function facebook_connect() { 
+	global $facebook;
+	// See if there is a user from a cookie
+	$user = $facebook->getUser();
+	if ($user) {
+		try {
+			//Gets facebook user info
+			$fu = $facebook->api('/me');
+			$username = api_get_setting('login_is_email') == 'true' ? $fu['email'] : $fu['username'];
+			//Checks if user already exists in chamilo
+			$u = array(
+					'firstname' => $fu['first_name'],
+					'lastname' => $fu['last_name'],
+					'status' => STUDENT,
+					'email' => $fu['email'],
+					'username' => $username,
+					'language' => 'french',
+					'password' => DEFAULT_PASSWORD,
+					'auth_source' => 'facebook',
+					//'courses' => $user_info['courses'],
+					//'profile_link' => $user_info['profile_link'],
+					//'worldwide_bu' => $user_info['worlwide_bu'],
+					//'manager' => $user_info['manager'],
+					'extra' => array()
+					);
+			$cu = api_get_user_info_from_username($username);
+			$chamilo_uinfo = api_get_user_info_from_username($username);
+			if ( $chamilo_uinfo  === false) {
+				//we have to create the user
+				$chamilo_uid = external_add_user($u);
+				if ($chamilo_uid !==false) {
+					$_user['user_id'] = $chamilo_uid;
+					$_user['uidReset'] = true;  
+					$_SESSION['_user'] = $_user;
+					header('Location:'.api_get_path(WEB_PATH));
+					exit();
+				} else {
+					return false;
+				}
+			} else {//User already exists, update info and login
+				$chamilo_uid = $chamilo_uinfo['user_id'];
+				$u['user_id'] = $chamilo_uid;
+				external_update_user($u);
+				$_user['user_id'] = $chamilo_uid;
+				$_user['uidReset'] = true;  
+				$_SESSION['_user'] = $_user;
+				header('Location:'.api_get_path(WEB_PATH));
+				exit();
+			}
+		} catch (FacebookApiException $e) {
+			echo '<pre>'.htmlspecialchars(print_r($e, true)).'</pre>';
+			$user = null;
+		}
+	}
+}
+
+/**
+* Get facebook login url for the platform
+**/
+function facebook_get_login_url(){
+	global $facebook, $facebook_config;
+
+	$login_url = $facebook->getLoginUrl(
+			array(
+				'scope'	=> 'email,publish_stream',
+				'redirect_uri' => $facebook_config['return_url']
+				)
+			); 
+	return $login_url;
+}
+