127 lines
3.3 KiB
PHP
127 lines
3.3 KiB
PHP
<?php
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namespace controller;
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use controller\db\Database;
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use DateTime;
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Class UserSession{
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public $uid = -1;
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public $token = "undefined";
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public $expires;
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public static $session;
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public function __construct($uid, $token = "undefined"){
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$this->uid = $uid;
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$this->token = $token;
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$this->setExpiry();
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//echo($loginSessionToken);
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$_SESSION['usersession'] = $this;
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setcookie('usersession', $this->token);
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setcookie('uid', $this->uid);
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}
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public function setSessionToken($token){
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$this->token = $token;
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}
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public function getSessionToken(){
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return $this->token;
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}
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public function getFormattedExpiry(){
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return $this->expires->format('Y-m-d H:i:s');
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}
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public function setExpiry(){
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$this->expires = new DateTime();
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$this->expires->modify("+ 1 hour");
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}
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public static function generateToken(){
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$chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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$token = "";
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for ($i=0; $i < 32 ; $i++) {
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$token .= $chars[rand(0, strlen($chars) - 1)];
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}
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return $token;
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}
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public static function isSessionValid(){
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if(isset($_SESSION['usersession'])){
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if(!Database::isSessionValid($_SESSION['usersession']->token, $_SESSION['usersession']->uid)){
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return false;
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}
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if(!UserSession::isSessionExpired($_SESSION['usersession'])){
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//check if session also exists in database
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return true;
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}
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}
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else{
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if(isset($_COOKIE['usersession'])){
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$token = $_COOKIE['usersession'];
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$uid = $_COOKIE['uid'];
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if(Database::isSessionValid($token,$uid)){
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$session = new UserSession($uid, $token);
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$session->expires = new DateTime(Database::getSessionExpiryDate($token));
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}
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else{
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return false;
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}
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if(!UserSession::isSessionExpired($session)){
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return true;
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}
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}
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return false;
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}
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}
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public static function getSession()
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{
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if(isset($_SESSION['usersession'])){
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return $_SESSION['usersession'];
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}
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}
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public static function isSessionExpired($session){
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//session is expired
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if(new DateTime() > $session->expires){
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return true;
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}
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//session is not expired
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else{
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return false;
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}
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}
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public static function isUserSignedIn(){
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/*
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if(UserSession::isSessionValid()){
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if(!UserSession::isSessionExpired(UserSession::getSession())){
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if(Database::isSessionValid(UserSession::getSession()->token, UserSession::getSession()->uid)){
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return true;
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}
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}
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else{
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return false;
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}
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}
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else{
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return false;
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}
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*/
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//session exists, no need to do anything
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if(isset($_SESSION['usersession'])){
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return true;
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}
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else{
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if(isset($_COOKIE['usersession'])){
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//check if the session exists in the database
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if(Database::isSessionTokenInUse($_COOKIE['usersession'])){
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//check if database expiration datetime is still valid
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$expirationDateTime = Database::getSessionExpiryDate($_COOKIE['usersession']);
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if(new DateTime($expirationDateTime) >= new DateTime()){
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//user is signed in. Restore session
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$userSession = new UserSession($_COOKIE['uid'], $_COOKIE['usersession']);
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return true;
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}
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else{
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//remove session from the database
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Database::invalidateSession($_COOKIE['usersession']);
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}
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}
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}
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}
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//session either doesn't exist, doesn't exist in cookie, doesn't exist in database, or is expired in the database.
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return false;
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}
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}
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?>
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