function fbc_init_auth()
{
$fbuid = fbc_facebook_client()->get_loggedin_user();
$user = wp_get_current_user();
$assoc_fbuid = fbc_get_fbuid($user->ID);
if ($assoc_fbuid) {
if ($fbuid == $assoc_fbuid) {
// user is already logged in to both
fbc_login_header('logged in', $fbuid, $user->ID);
return;
} else {
//wp session, no fbsession = logout of wp and reload page
// or, user is logged in under a different fb account
wp_logout();
header('Location: ' . $_SERVER['REQUEST_URI']);
fbc_login_header('logging user out assoc=' . $assoc_fbuid, $fbuid, $user->ID);
exit;
}
} else {
if ($user->ID) {
fbc_login_header('non-facebook user', $fbuid, $user->ID);
// wpuser not associated w/ fb. do nothing
return;
} else {
if ($fbuid) {
// not a wp user, but fb authed = log them in to wp
$res = fbc_login_if_necessary();
if ($res > 0) {
$wp_uid = fbc_fbuser_to_wpuser($res);
wp_set_current_user($wp_uid);
fbc_login_header('login sucessful', $fbuid, $wp_uid);
} else {
fbc_login_header('login error ' . $res, $fbuid, $user->ID);
}
} else {
fbc_login_header('anonymous', 0, 0);
// neither facebook nor wordpress, do nothing
return;
}
}
}
}
function fbc_login_if_necessary($allow_link = false)
{
$fbuid = fbc_facebook_client()->get_loggedin_user();
if ($fbuid) {
$wpuid = fbc_fbuser_to_wpuser($fbuid);
if (!$wpuid) {
// There is no wp user associated w/ this fbuid
$user = wp_get_current_user();
$wpuid = $user->ID;
if ($wpuid && $allow_link) {
// User already has a wordpress account, link to this facebook account
update_usermeta($wpuid, 'fbuid', "{$fbuid}");
} else {
// Create a new wordpress account
$wpuid = fbc_insert_user($fbuid);
if ($wpuid === FBC_ERROR_USERNAME_EXISTS) {
return FBC_ERROR_USERNAME_EXISTS;
}
}
} else {
// Already have a linked wordpress account, fall through and set
// login cookie
}
wp_set_auth_cookie($wpuid, true, false);
return $fbuid;
} else {
return FBC_ERROR_NO_FB_SESSION;
}
}
