mirror of
https://github.com/beestat/app.git
synced 2025-05-24 02:14:03 -04:00
318 lines
9.2 KiB
PHP
318 lines
9.2 KiB
PHP
<?php
|
|
|
|
namespace cora;
|
|
|
|
/**
|
|
* Offers session-related functions.
|
|
*
|
|
* @author Jon Ziebell
|
|
*/
|
|
final class session {
|
|
|
|
/**
|
|
* The current session.
|
|
*
|
|
* @var array
|
|
*/
|
|
private $session;
|
|
|
|
/**
|
|
* The singleton.
|
|
*
|
|
* @var session
|
|
*/
|
|
private static $instance;
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
private function __construct() {}
|
|
|
|
/**
|
|
* Use this function to instantiate this class instead of calling new
|
|
* session() (which isn't allowed anyways). This avoids confusion from
|
|
* trying to use dependency injection by passing an instance of this class
|
|
* around everywhere.
|
|
*
|
|
* @return session A new session object or the already created one.
|
|
*/
|
|
public static function get_instance() {
|
|
if(isset(self::$instance) === false) {
|
|
self::$instance = new self();
|
|
}
|
|
return self::$instance;
|
|
}
|
|
|
|
/**
|
|
* Return whether or not this class has been instantiated.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function has_instance() {
|
|
return isset(self::$instance);
|
|
}
|
|
|
|
/**
|
|
* Request a session. This method sets a couple cookies and returns the
|
|
* session key. By default, all cookies except those set in
|
|
* $additional_cookie_values are marked as httponly, which means only the
|
|
* server can access them. Use the following table to determine when the
|
|
* local cookie will be set to expire.
|
|
*
|
|
* timeout | life | expire
|
|
* -------------------------------
|
|
* null | null | never expires due to inactivity, never expires due to time limit
|
|
* null | set | never expires due to inactivity, expires in life seconds
|
|
* set | null | expires after timeout inactivity, never expires due to time limit
|
|
* set | set | expires after timeout inactivity, expires in life seconds
|
|
*
|
|
* @param int $timeout How long, in seconds, until the session expires due
|
|
* to inactivity. Set to null for no timeout.
|
|
* @param int $life How long, in seconds, until the session expires. Set to
|
|
* null for no expiration.
|
|
* @param int $user_id An optional external integer pointer to another
|
|
* table. This will most often be user.user_id, but could be something like
|
|
* person.person_id or player.player_id.
|
|
* @param array $additional_cookie_values Set additional values in the
|
|
* cookie by setting this value. Doing this is generally discouraged as
|
|
* cookies add state to the application, but something like a username for a
|
|
* "remember me" checkbox is reasonable.
|
|
*
|
|
* @return string The generated session key.
|
|
*/
|
|
public function request($timeout = null, $life = null, $user_id = null, $additional_cookie_values = null) {
|
|
$database = database::get_instance();
|
|
$session_key = $this->generate_session_key();
|
|
|
|
$this->session = $database->create(
|
|
'cora\session',
|
|
[
|
|
'session_key' => $session_key,
|
|
'timeout' => $timeout,
|
|
'life' => $life,
|
|
'user_id' => $user_id,
|
|
'created_by' => ip2long($_SERVER['REMOTE_ADDR']),
|
|
'last_used_by' => ip2long($_SERVER['REMOTE_ADDR']),
|
|
'last_used_at' => date('Y-m-d H:i:s')
|
|
]
|
|
);
|
|
|
|
// Set the local cookie expiration.
|
|
if($life !== null) {
|
|
$expire = time() + $life;
|
|
}
|
|
else {
|
|
if($timeout === null) {
|
|
$expire = 4294967295; // 2038
|
|
}
|
|
else {
|
|
$expire = 0; // Browser close
|
|
}
|
|
}
|
|
|
|
// Set all of the necessary cookies. Both *_session_key and *_user_id are
|
|
// read every API request and made available to the API.
|
|
$this->set_cookie('session_key', $session_key, $expire);
|
|
if(isset($additional_cookie_values) === true) {
|
|
foreach($additional_cookie_values as $key => $value) {
|
|
$this->set_cookie($key, $value, $expire, false);
|
|
}
|
|
}
|
|
|
|
return $session_key;
|
|
}
|
|
|
|
/**
|
|
* Similar to the Linux touch command, this method "touches" the session and
|
|
* updates last_used_at and last_used_by. This is executed every time a
|
|
* request that requires a session is sent to the API. Note that this uses
|
|
* the cookie sent by the client directly so there is no default way to
|
|
* touch a session unless you are the one logged in to it.
|
|
*
|
|
* @param $string session_key The session_key to use. If not set, will use
|
|
* $_COOKIE['session_key'].
|
|
*
|
|
* @return bool True if it was successfully updated, false if the session
|
|
* does not exist or is expired. Basically, return bool whether or not the
|
|
* sesion is valid.
|
|
*/
|
|
public function touch($session_key = null) {
|
|
if($session_key === null && isset($_COOKIE['session_key']) === true) {
|
|
$session_key = $_COOKIE['session_key'];
|
|
}
|
|
|
|
if($session_key === null) {
|
|
return false;
|
|
}
|
|
|
|
$database = database::get_instance();
|
|
|
|
$sessions = $database->read(
|
|
'cora\session',
|
|
[
|
|
'session_key' => $session_key,
|
|
'deleted' => 0
|
|
]
|
|
);
|
|
if(count($sessions) === 1) {
|
|
$session = $sessions[0];
|
|
|
|
// Check for expired session.
|
|
if(
|
|
(
|
|
$session['timeout'] !== null &&
|
|
(strtotime($session['last_used_at']) + strtotime($session['timeout'])) < time()
|
|
) ||
|
|
(
|
|
$session['life'] !== null &&
|
|
(strtotime($session['last_used_at']) + strtotime($session['life'])) < time()
|
|
)
|
|
) {
|
|
$this->delete_cookie('session_key');
|
|
return false;
|
|
}
|
|
|
|
$this->session = $database->update(
|
|
'cora\session',
|
|
[
|
|
'session_id' => $session['session_id'],
|
|
'last_used_at' => date('Y-m-d H:i:s'),
|
|
'last_used_by' => ip2long($_SERVER['REMOTE_ADDR'])
|
|
]
|
|
);
|
|
|
|
return true;
|
|
}
|
|
else {
|
|
$this->delete_cookie('session_key');
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private function invalidate_cookies() {
|
|
|
|
}
|
|
|
|
/**
|
|
* Delete the session with the provided session_key. If no session_key is
|
|
* provided, delete the current session. This function is provided to aid
|
|
* session management. Call it with no parameters for something like
|
|
* user->log_out(), or set $session_key to end a specific session. You would
|
|
* typically want to have your own permission layer on top of that to enable
|
|
* only admins to do that.
|
|
*
|
|
* @param string $session_key The session key of the session to delete.
|
|
*
|
|
* @return bool True if it was successfully deleted. Could return false for
|
|
* a non-existent session key or if it was already deleted.
|
|
*/
|
|
public function delete($session_key = null) {
|
|
$database = database::get_instance();
|
|
if($session_key === null) {
|
|
$session_key = $this->session['session_key'];
|
|
}
|
|
|
|
$sessions = $database->read('cora\session', ['session_key' => $session_key]);
|
|
if(count($sessions) === 1) {
|
|
$database->delete('cora\session', $sessions[0]['session_id']);
|
|
// Remove these if the current session got logged out.
|
|
if($session_key === $this->session['session_key']) {
|
|
$this->session = null;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get the user_id on this session. Useful for getting things like the
|
|
* user_id for the currently logged in user.
|
|
*
|
|
* @return int The current user_id.
|
|
*/
|
|
public function get_user_id() {
|
|
if ($this->session !== null) {
|
|
return $this->session['user_id'];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Get the session.
|
|
*
|
|
* @return array The session.
|
|
*/
|
|
public function get() {
|
|
return $this->session;
|
|
}
|
|
|
|
/**
|
|
* Generate a random (enough) session key.
|
|
*
|
|
* @return string The generated session key.
|
|
*/
|
|
private function generate_session_key() {
|
|
return bin2hex(random_bytes(20));
|
|
}
|
|
|
|
/**
|
|
* Sets a cookie. If you want to set custom cookies, use the
|
|
* $additional_cookie_values argument on $session->create().
|
|
*
|
|
* @param string $name The name of the cookie.
|
|
* @param mixed $value The value of the cookie.
|
|
* @param int $expire When the cookie should expire.
|
|
* @param bool $httponly True if the cookie should only be accessible on the
|
|
* server.
|
|
*
|
|
* @throws \Exception If The cookie fails to set.
|
|
*/
|
|
private function set_cookie($name, $value, $expire, $httponly = true) {
|
|
$this->setting = setting::get_instance();
|
|
$path = '/'; // The current directory that the cookie is being set in.
|
|
$secure = $this->setting->get('force_ssl');
|
|
|
|
preg_match(
|
|
'/https?:\/\/(.*?)\//',
|
|
$this->setting->get('beestat_root_uri'),
|
|
$matches
|
|
);
|
|
$domain = $matches[1];
|
|
|
|
$cookie_success = setcookie(
|
|
$name,
|
|
$value,
|
|
$expire,
|
|
$path,
|
|
$domain,
|
|
$secure,
|
|
$httponly
|
|
);
|
|
|
|
if($cookie_success === false) {
|
|
throw new \Exception('Failed to set cookie.', 1400);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Delete a cookie. This will remove the cookie value and set it to expire 1
|
|
* day ago.
|
|
*
|
|
* @param string $name The name of the cookie to delete.
|
|
*/
|
|
private function delete_cookie($name) {
|
|
$this->set_cookie($name, '', time() - 86400);
|
|
}
|
|
|
|
/**
|
|
* Check if the session is valid.
|
|
*
|
|
* @return bool Whether or not the session is valid.
|
|
*/
|
|
public function is_valid() {
|
|
return $this->session !== null;
|
|
}
|
|
}
|