}
if (!isset($_SESSION['account_href'])) {
getAccounts($_SESSION['token']);
}
if (!isset($_SESSION['project_href'])) {
getProjects($_SESSION['account_href'], $_SESSION['token']);
}
getTodos($_SESSION['project'], $_SESSION['token']);
} else {
switch ($_GET['action']) {
case 'redirect':
if (!isset($_GET['code'])) {
throw new InvalidArgumentException("verification code missing");
}
$verification_code = $_GET['code'];
$tokens = $oauth->exchangeVerificationCode($verification_code);
$_SESSION['token'] = $tokens['access_token'];
setcookie('token', $tokens['access_token']);
file_put_contents('tokens', serialize($tokens) . "\n-----------------------\n", FILE_APPEND);
getAccounts($tokens['access_token']);
break;
case 'choose_user':
$_SESSION['account_href'] = $_POST['url_base'];
setcookie('account_href', $_POST['url_base']);
header('Location: index.php');
break;
case 'choose_project':
$_SESSION['project_href'] = $_POST['project_url'];
setcookie('project_href', $_POST['project_url']);
$_SESSION['project'] = $_POST['project'];
setcookie('project', $_POST['project']);