<?php
session_start();
$user = new User();
$participant = new User();
if ($user->selectByEmail(Database::sessionDecrypt($_SESSION['user'])) && $participant->selectByEmail($_POST['participant'])) {
$trip = new Trip();
if ($trip->selectById($_POST['tripId'])) {
if ($trip->addParticipant($participant->getUserId())) {
echo ReturnCode::$success;
} else {
echo ReturnCode::$error;
}
} else {
echo ReturnCode::$tripNotFound;
}
} else {
echo ReturnCode::$userNotFound;
}