bb_get_option( 'fb_app_id' ), 'secret' => bb_get_option( 'fb_secret' ), 'cookie' => true, )); $session = $facebook->getSession(); $me = null; if ($session) { try { $uid = $facebook->getUser(); $me = $facebook->api('/me'); } catch (FacebookApiException $e) { error_log($e); } } return $me; } function get_fb_login_button($text = "Login with Facebook", $always_display = false) { if ( $always_display || !bb_is_user_logged_in() ) { global $_fb_need_sdk, $_fb_need_loginscript; $_fb_need_sdk = 1; $_fb_need_loginscript = 1; $perms = ''; if ( bb_get_option ( 'fb_request_email' ) ) $perms = ' perms="email"'; return "$text"; } } function fb_login_button($text = "Login with Facebook", $always_display = false) { echo get_fb_login_button($text, $always_display); } function fb_bb_get_avatar($avatar, $id_or_email, $size, $default, $alt) { if (!is_digits($id_or_email)) return $avatar; $fbid = fb_get_facebookid_by_userid($id_or_email); if (!$fbid) return $avatar; //$pictype = ($size > 50) ? "?type=large" : ""; $pictype = ""; if ( false === $alt) $safe_alt = ''; else $safe_alt = esc_attr( $alt ); $class = 'photo avatar avatar-' . $size; $src = "https://graph.facebook.com/$fbid/picture$pictype"; $avatar = ' ' . $safe_alt . '

'; return $avatar; } function fb_bb_current_user_can($retvalue, $capability, $arg) { if ($capability != 'change_user_password' && $capability != 'edit_user') return $retvalue; if (bb_current_user_can('edit_users')) return $retvalue; $user_id = bb_get_current_user_info( 'id' ); if (!$user_id) return $retvalue; $fbid = fb_get_facebookid_by_userid($user_id); if (!$fbid) return $retvalue; switch ($capability) { case 'change_user_password': return false; case 'edit_user': return ( bb_get_option( 'fb_allow_useredit' ) ) ? $retvalue : false; default: return $retvalue; } } function bb_fb_connect() { global $wp_users_object; $me = try_fb_connect(); if (!$me) { bb_die("Facebook Connect failed"); exit; } $fb_id = $me['id']; if (!$fb_id || !is_digits($fb_id)) { bb_die("Facebook Connect failed, no user id found."); exit; } // Check if the user has already connected before $user_id = fb_get_userid_by_facebookid($fb_id); if (!$user_id) { // User did not exist yet, lets create the local account // First order of business is to find a unused usable account name for ($i = 1; ; $i++) { $user_login = strtolower(sanitize_user(fb_get_user_displayname($me), true)); $user_login = str_replace(' ', '_', $user_login); $user_login = str_replace('__', '_', $user_login); if (strlen($user_login) < 2) $user_login = "user"; if (strlen($user_login) > (50 - strlen($i))) $user_login = substr($user_login, 0, (50 - strlen($i))); if ($i > 1) $user_login .= $i; // A very rare potential race condition exists here, if two users with the same name // happen to register at the same time. On of them would fail, and have to retry. if (bb_get_user($user_login, array ('by' => 'login')) === false) break; } $user_nicename = $user_login; $user_email = $user_login."@none.local"; $user_url = trim($me['link']); $user_url = $user_url ? bb_fix_link($user_url) : ''; $user_status = 0; $user_pass = bb_generate_password(); // User may have given permission to use his/her real email. Lets use it if so. if (isset($me['email']) && $me['email'] != '' && is_email($me['email'])) { $user_email = trim($me['email']); if (bb_get_user($user_email, array ('by' => 'email')) !== false) { // Uh oh. A user with this email already exists. This does not work out for us. bb_die("Error: an user account with the email address '$user_email' already exists."); } } $user = $wp_users_object->new_user( compact( 'user_login', 'user_email', 'user_url', 'user_nicename', 'user_status', 'user_pass' ) ); if ( !$user || is_wp_error($user) ) { bb_die("Creating new user failed"); exit; } $user_id = $user['ID']; bb_update_usermeta($user_id, $bbdb->prefix . 'capabilities', array('member' => true) ); bb_update_usermeta($user_id, 'facebook_id', $fb_id); bb_update_user($user_id, $user_email, $user_url, fb_get_user_displayname($me)); bb_update_usermeta($user_id, 'first_name', trim($me['first_name'])); bb_update_usermeta($user_id, 'last_name', trim($me['last_name'])); do_action('bb_new_user', $user_id, $user_pass); do_action('register_user', $user_id); } else { if (! bb_get_option( 'fb_allow_useredit' ) ) { // enforce first name, last name and display name if the users are not allowed to change them bb_update_user($user_id, bb_get_user_email($user_id), get_user_link($user_id), fb_get_user_displayname($me)); bb_update_usermeta($user_id, 'first_name', trim($me['first_name'])); bb_update_usermeta($user_id, 'last_name', trim($me['last_name'])); } } bb_set_auth_cookie( $user_id, true ); do_action('bb_user_login', $user_id); $redirect_url = $_REQUEST['fb_bb_connect']; if (strpos($redirect_url, bb_get_option('uri')) !== 0) $redirect_url = bb_get_option('uri'); bb_safe_redirect($redirect_url); exit; } function fb_get_user_displayname($me) { switch (bb_get_option('fb_displayname_from')) { case 2: $name = $me['last_name']; break; case 1: $name = $me['first_name']; break; case 0: default: $name = $me['name']; break; } $name = trim($name); if (!$name) { $name = trim($me['name']); if (!$name) $name = "Unknown"; } return $name; } function fb_get_userid_by_facebookid($fb_id) { global $bbdb; $bb_userid = $bbdb->get_var("SELECT user_id FROM `".$bbdb->usermeta."` WHERE meta_key = 'facebook_id' AND meta_value = '".$fb_id."'"); return ($bb_userid > 0) ? $bb_userid : 0; } function fb_get_facebookid_by_userid($u_id) { $bb_fbid = bb_get_usermeta($u_id, 'facebook_id'); return ($bb_fbid > 0) ? $bb_fbid : 0; } function fb_foot_script() { global $_fb_need_sdk, $_fb_need_loginscript; ?>

A Facebook Application ID and Secret Key are needed. These can be obtained from Facebook developer pages.

Remember to check that OAuth 2.0 support is enabled. This setting is located under Advanced-tab of your Facebook application page.

__( 'Facebook Application ID' ), 'attributes' => array( 'maxlength' => 20), 'after' => '[Numeric] Example: 123456789012345' ) ); bb_option_form_element( 'fb_secret', array( 'title' => __( 'Facebook Application Secret' ), 'attributes' => array( 'maxlength' => 40 ), 'after' => "[Alphanumeric] Example: abcdef123456abcdef123456abcdef123456" ) ); bb_option_form_element( 'fb_displayname_from', array( 'title' => __( 'Set as Display Name' ), 'type' => 'select', 'options' => array( 0 => __( 'Full Name' ), 1 => __( 'First Name' ), 2 => __( 'Last Name' ) ), 'after' => "The users Display Name will be set to this value as provided by Facebook" ) ); bb_option_form_element( 'fb_allow_useredit', array( 'title' => __( 'Allow User Edit' ), 'type' => 'checkbox', 'options' => array( 1 => __( 'Allow users to edit their own profile information, such as first name, last name and display name' ) ) ) ); bb_option_form_element( 'fb_request_email', array( 'title' => __( 'Request Real Email' ), 'type' => 'checkbox', 'options' => array( 1 => __( 'Request users real email address from Facebook (user must accept this). A dummy email is set to new users if this is disabled.' ) ) ) ); bb_option_form_element( 'fb_hide_post_login', array( 'title' => __( 'Hide login in post form' ), 'type' => 'checkbox', 'options' => array( 1 => __( 'Hide the "You must login to reply" in post-form for non-logged in users. This links to the traditional login page otherwise, which Facebook Connected users cannot use.' ) ) ) ); bb_option_form_element( 'fb_sdkinit', array( 'title' => __( 'Facebook Javascript SDK initialization' ), 'type' => 'select', 'options' => array( 0 => __( 'Automatic' ), 1 => __( 'Always' ), 2 => __( 'Never' ) ), 'after' => "Select how Facebook Javascript SDK is initialized. This can be used to enable compatibility with conflicting/overlapping themes and/or plugins." ) ); ?>

2) { $_POST['fb_displayname_from'] = 0; } bb_update_option('fb_displayname_from', intval($_POST['fb_displayname_from'])); if (!isset($_POST['fb_sdkinit']) || $_POST['fb_sdkinit'] < 0 || $_POST['fb_sdkinit'] > 2) { $_POST['fb_sdkinit'] = 0; } bb_update_option('fb_sdkinit', intval($_POST['fb_sdkinit'])); if (!isset($_POST['fb_allow_useredit']) || true !== (bool) $_POST['fb_allow_useredit']) { bb_delete_option('fb_allow_useredit'); } else { bb_update_option('fb_allow_useredit', 1); } if (!isset($_POST['fb_request_email']) || true !== (bool) $_POST['fb_request_email']) { bb_delete_option('fb_request_email'); } else { bb_update_option('fb_request_email', 1); } if (!isset($_POST['fb_hide_post_login']) || true !== (bool) $_POST['fb_hide_post_login']) { bb_delete_option('fb_hide_post_login'); } else { bb_update_option('fb_hide_post_login', 1); } bb_admin_notice( __('Configuration saved.') ); } } add_action('fb_configuration_page_pre_head', 'fb_configuration_page_process'); // Exit if configuration has not been done if ( !bb_get_option( 'fb_app_id' ) || !bb_get_option( 'fb_secret' )) { return; } add_filter('bb_get_avatar', 'fb_bb_get_avatar', 10, 5); add_filter('bb_current_user_can', 'fb_bb_current_user_can', 10, 3); add_action('bb_foot', 'fb_foot_script'); if ( bb_get_option( 'fb_hide_post_login' ) ) { add_action('pre_post_form', 'fb_pre_hide_post_login'); add_action('post_post_form', 'fb_post_hide_post_login'); } function fb_pre_hide_post_login() { if ( !bb_is_user_logged_in() ) { echo "\n"; } } if ( isset( $_REQUEST['fb_bb_connect'] ) ) { add_action('bb_send_headers', 'bb_fb_connect'); } if (! function_exists( 'is_digits') ) : function is_digits($string) { return (preg_match('|[^0-9]|', $string) == 0) ? true : false; } endif; ?>