<?php
    require_once(dirname(dirname(dirname(dirname(__FILE__))))."/engine/engine.php");

    admin_gatekeeper();

    $id = get_input('id');
    $first_name = get_input('first_name');
    $last_name = get_input('last_name');
    $email = get_input('email');
    $role = get_input('role');
    $institution = get_input('institution');
    if (!$id) {
        $forward_to = "users/user/add";
    } else {
        $forward_to = "users/user/${id}/edit";
    }

    $input_values = get_inputs();
    $_SESSION['input_values'] = $input_values;

	if (empty($first_name) || empty($last_name) || empty($email)) {
		$TeKe->add_system_message(_("At least one of the parameters is empty."), 'error');
        forward($forward_to);
    } else if (!$TeKe->user->is_valid_email($email)) {
        $TeKe->add_system_message(_("Email is not valid."), "error");
        forward($forward_to);
    } else if ($TeKe->user->check_email_exists($email) && $id <= 0) {
        $TeKe->add_system_message(_("User with that email already exists."), "error");
        forward($forward_to);
    } else if ($id > 0) {
        $user = $TeKe->user->getUserById($id);
        if ($TeKe->user->check_email_exists($email) && $user->getEmail() != $email) {
            $TeKe->add_system_message(_("User with that email already exists."), "error");
            forward($forward_to);
        } else {
            $user_id = $TeKe->plugin->users->editUser($id, $first_name, $last_name, $email, $role, $institution); 
            if ($user_id) {
                $TeKe->add_system_message(_("Changes saved."));
                forward("users/view");
            } else {
                $TeKe->add_system_message(_("Saving failed."), 'error');
                forward("users/user/${id}/edit");
            }
        }
    } else {
        if ($user_id = $TeKe->plugin->addUser($first_name, $last_name, $email, $role, $institution)) {
            $TeKe->add_system_message(_("Success."));
        } else {
            $TeKe->add_system_message(_("Registration failed."), 'error');
            forward($forward_to);
        }
    }

    unset($_SESSION['input_values']);
    forward("users/view");
?>