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Session.php
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/
Session.php
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<?php
declare(strict_types=1);
namespace Bow\Session;
use Bow\Contracts\CollectionInterface;
use Bow\Security\Crypto;
use Bow\Session\Exception\SessionException;
use InvalidArgumentException;
class Session implements CollectionInterface
{
/**
* The internal session variable
*
* @var array
*/
public const CORE_SESSION_KEY = [
"flash" => "__bow.flash",
"old" => "__bow.old",
"listener" => "__bow.event.listener",
"csrf" => "__bow.csrf",
"cookie" => "__bow.cookie.secure",
"cache" => "__bow.session.key.cache"
];
/**
* The session available driver
*
* @var array
*/
private array $driver = [
'database' => \Bow\Session\Driver\DatabaseDriver::class,
'array' => \Bow\Session\Driver\ArrayDriver::class,
'file' => \Bow\Session\Driver\FilesystemDriver::class,
];
/**
* The instance of Session
*
* @var Session
*/
private static ?Session $instance = null;
/**
* The session configuration
*
* @var array
*/
private array $config;
/**
* Session constructor.
*
* @param array $config
*/
private function __construct(array $config)
{
if (!isset($config['driver'])) {
throw new SessionException("The session driver is undefined");
}
if (!isset($this->driver[$config['driver']])) {
throw new SessionException("The session driver is not support");
}
// We merge configuration
$this->config = array_merge([
'name' => 'Bow',
'path' => '/',
'domain' => null,
'secure' => false,
'httponly' => false,
'save_path' => null,
], $config);
}
/**
* Configure session instance
*
* @param array $config
* @return Session
*/
public static function configure(array $config): Session
{
if (static::$instance == null) {
static::$instance = new Session($config);
}
return static::$instance;
}
/**
* Get session singleton
*
* @return ?Session
*/
public static function getInstance(): ?Session
{
return static::$instance;
}
/**
* Session starter.
*
* @return bool
*/
public function start(): bool
{
if (PHP_SESSION_ACTIVE == session_status()) {
return true;
}
// Load session driver
$this->initializeDriver();
// Set the cookie param
$this->setCookieParameters();
// Boot session
$started = $this->boot();
// Init interne session manager
$this->initializeInternalSessionStorage();
return $started;
}
/**
* Start session natively
*
* @return bool
*/
private function boot(): bool
{
if (!headers_sent()) {
return @session_start();
}
throw new SessionException('Headers already sent. Cannot start session.');
}
/**
* Load session driver
*
* @return void
*/
private function initializeDriver(): void
{
// We Apply session cookie name
@session_name($this->config['name']);
if (!isset($_COOKIE[$this->config['name']])) {
@session_id(hash("sha256", $this->generateId()));
}
// We create get driver
$driver = $this->driver[$this->config['driver']] ?? null;
if (is_null($driver)) {
throw new SessionException('The driver ' . $this->config['driver'] . ' is not valid');
}
switch ($this->config['driver']) {
case 'file':
@session_save_path(realpath($this->config['save_path']));
$handler = new $driver(realpath($this->config['save_path']));
break;
case 'database':
$handler = new $driver($this->config['database'], request()->ip());
break;
case 'array':
$handler = new $driver();
break;
default:
throw new SessionException('Cannot set the session driver');
break;
}
// Set the session driver
if (!@session_set_save_handler($handler, true)) {
throw new SessionException('Cannot set the session driver');
}
}
/**
* Load internal session
*
* @return void
*/
private function initializeInternalSessionStorage(): void
{
if (!isset($_SESSION[static::CORE_SESSION_KEY['csrf']])) {
$_SESSION[static::CORE_SESSION_KEY['csrf']] = new \stdClass();
}
if (!isset($_SESSION[static::CORE_SESSION_KEY['cache']])) {
$_SESSION[static::CORE_SESSION_KEY['cache']] = [];
}
if (!isset($_SESSION[static::CORE_SESSION_KEY['listener']])) {
$_SESSION[static::CORE_SESSION_KEY['listener']] = [];
}
if (!isset($_SESSION[static::CORE_SESSION_KEY['flash']])) {
$_SESSION[static::CORE_SESSION_KEY['flash']] = [];
}
if (!isset($_SESSION[static::CORE_SESSION_KEY['old']])) {
$_SESSION[static::CORE_SESSION_KEY['old']] = [];
}
}
/**
* Set session cookie params
*
* @return void
*/
private function setCookieParameters()
{
session_set_cookie_params(
$this->config["lifetime"],
$this->config["path"],
$this->config['domain'],
$this->config["secure"],
$this->config["httponly"]
);
}
/**
* Generate session ID
*
* @return string
*/
private function generateId()
{
return Crypto::encrypt(uniqid(microtime(false)));
}
/**
* Generate session
*/
public function regenerate()
{
$this->flush();
$this->start();
}
/**
* Allows to filter user defined variables
* and those used by the framework.
*
* @return array
*/
private function filter()
{
$arr = [];
$this->start();
foreach ($_SESSION as $key => $value) {
if (!array_key_exists($key, static::CORE_SESSION_KEY)) {
$arr[$key] = $value;
}
}
return $arr;
}
/**
* Allows checking for the existence of a key in the session collection
*
* @param string|int $key
* @param bool $strict
* @return bool
*/
public function has(string|int $key, bool $strict = false): bool
{
$this->start();
$cache = $_SESSION[static::CORE_SESSION_KEY['cache']];
$flash = $_SESSION[static::CORE_SESSION_KEY['flash']];
if (!$strict) {
if (isset($cache[$key])) {
return true;
}
if (isset($flash[$key])) {
return true;
}
return isset($_SESSION[$key]);
}
$value = $cache[$key] ?? null;
if (!is_null($value)) {
return count((array) $value) > 0;
}
$value = $flash[$key] ?? null;
if (!is_null($value)) {
return count((array) $value) > 0;
}
if (isset($_SESSION[$key]) && !is_null($_SESSION[$key])) {
return count((array) $_SESSION[$key]) > 0;
}
return false;
}
/**
* Allows checking for the existence of a key in the session collection
*
* @param string $key
* @return bool
*/
public function exists($key): bool
{
return $this->has($key, true);
}
/**
* Check whether a collection is empty.
*
* @return bool
*/
public function isEmpty(): bool
{
return empty($this->filter());
}
/**
* Retrieves a value or value collection.
*
* @param string $key
* @param mixed $default
* @return mixed
*/
public function get(mixed $key, mixed $default = null): mixed
{
$content = $this->flash($key);
if (!is_null($content)) {
return $content;
}
if (is_null($content) && $this->has($key)) {
return $_SESSION[$key] ?? null;
}
if (is_callable($default)) {
return $default();
}
return $default;
}
/**
* Add an entry to the collection
*
* @param string|int $key
* @param mixed $value
* @param boolean $next
* @throws InvalidArgumentException
* @return mixed
*/
public function add(string|int $key, mixed $value, $next = false): mixed
{
$this->start();
$_SESSION[static::CORE_SESSION_KEY['cache']][$key] = true;
if ($next == false) {
return $_SESSION[$key] = $value;
}
if (! $this->has($key)) {
$_SESSION[$key] = [];
}
if (!is_array($_SESSION[$key])) {
$_SESSION[$key] = [$_SESSION[$key]];
}
$_SESSION[$key] = array_merge($_SESSION[$key], [$value]);
return $value;
}
/**
* The add alias
*
* @see \Bow\Session\Session::add
*/
public function put(string|int $key, mixed $value, $next = false): mixed
{
return $this->add($key, $value, $next);
}
/**
* Returns the list of session variables
*
* @return array
*/
public function all(): array
{
return $this->filter();
}
/**
* Delete an entry in the collection
*
* @param string $key
*
* @return mixed
*/
public function remove(string|int $key): mixed
{
$this->start();
$old = null;
if ($this->has($key)) {
$old = $_SESSION[$key];
}
unset($_SESSION[$key]);
unset($_SESSION[static::CORE_SESSION_KEY['cache']][$key]);
unset($_SESSION[static::CORE_SESSION_KEY['flash']][$key]);
return $old;
}
/**
* set
*
* @param string $key
* @param mixed $value
*
* @return mixed
*/
public function set(string|int $key, mixed $value): mixed
{
$this->start();
$old = null;
$_SESSION[static::CORE_SESSION_KEY['cache']][$key] = true;
if (!$this->has($key)) {
$_SESSION[$key] = $value;
return $old;
}
$old = $_SESSION[$key];
$_SESSION[$key] = $value;
return $old;
}
/**
* Add flash data
* After the data recovery is automatic deleted
*
* @param string|int $key
* @param mixed $message
* @return mixed
*/
public function flash(string|int $key, ?string $message = null): mixed
{
$this->start();
if ($message != null) {
$_SESSION[static::CORE_SESSION_KEY['flash']][$key] = $message;
return true;
}
$flash = $_SESSION[static::CORE_SESSION_KEY['flash']];
$content = isset($flash[$key]) ? $flash[$key] : null;
$tmp = [];
foreach ($flash as $i => $value) {
if ($i != $key) {
$tmp[$i] = $value;
}
}
$_SESSION[static::CORE_SESSION_KEY['flash']] = $tmp;
return $content;
}
/**
* Returns the list of session data as a array.
*
* @return array
*/
public function toArray(): array
{
return $this->filter();
}
/**
* Empty the flash system.
*/
public function clearFash(): void
{
$this->start();
$_SESSION[static::CORE_SESSION_KEY['flash']] = [];
}
/**
* Allows to clear the cache except csrf and __bow.flash
*/
public function clear(): void
{
$this->start();
foreach ($this->filter() as $key => $value) {
unset($_SESSION[static::CORE_SESSION_KEY['cache']][$key]);
unset($_SESSION[$key]);
}
}
/**
* Allows you to empty the session
*/
public function flush(): void
{
session_destroy();
}
/**
* Returns the list of session data as a toObject.
*
* @return array|void
*/
public function toObject(): array
{
throw new \BadMethodCallException("Bad method called");
}
/**
* __toString
*
* @return string
*/
public function __toString(): string
{
$this->start();
return json_encode($this->filter());
}
}