* Set configuration for client_id, client_secret and various OAuth endpoints
*/
require_once 'config.php';
/*
* Check the configuration
*/
require_once 'check_config.php';
/*
* Perform all authorization and authentication logic - exchanging auth
* code for access token, retrieving user profile info, looking up
* pre-existing refresh token in database, updating it (if applicable),
* and more.
*/
require_once 'auth_handler.php';
$authHandler = new AuthHandler($requestType);
$authHandler->VerifyAuth();
/*
* If an authorization 'code' is set, then we assume the user came from
* Google Drive and check to see if the 'state' parameter exists, with
* the mode and potially specified file IDs (on open) or a folder parentId
* (on create).
*/
if (isset($_GET['code'])) {
/*
* State should always be defined
*/
if (isset($_GET['state'])) {
$state = json_decode(stripslashes($_GET['state']));
$_SESSION['mode'] = $state->action;
if (isset($state->ids)) {
$_SESSION['fileIds'] = $state->ids;
