<?php

require_once 'master.php';

class Auth {

    public static function register($email, $password) {
        $user_results = User::get(array("email" => $email));
        if (!empty($user_results)) {
            throw new Exception("User with email $email already exists.");
        }
        $salt = rand();
        $user = new User(null, array(
                    'email' => $email,
                    'passwordHash' => sha1($password . $salt),
                    'passwordSalt' => $salt));
        $user->save();
        return $user;
    }

    public static function login($email, $password) {
        $user_results = User::get(array("email" => $email));
        if (empty($user_results)) {
            throw new Exception("User with email $email not found.");
        }
        $user = $user_results[0];
        if (sha1($password . $user->passwordSalt) != $user->passwordHash) {
            throw new Exception("Wrong password.");
        }
        return $user;
    }

    public static function restore($session) {
        $user_results = User::get(array("uid" => $session));
        if (empty($user_results)) {
            throw new Exception("Session with id $session not found.");
        }
        return $user_results[0];
    }

}

?>