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<?php
namespace Illuminate\Session;
use Closure;
use Illuminate\Contracts\Session\Session;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use SessionHandlerInterface;
use stdClass;
class Store implements Session
{
/**
* The session ID.
*
* @var string
*/
protected $id;
/**
* The session name.
*
* @var string
*/
protected $name;
/**
* The session attributes.
*
* @var array
*/
protected $attributes = [];
/**
* The session handler implementation.
*
* @var \SessionHandlerInterface
*/
protected $handler;
/**
* Session store started status.
*
* @var bool
*/
protected $started = false;
/**
* Create a new session instance.
*
* @param string $name
* @param \SessionHandlerInterface $handler
* @param string|null $id
* @return void
*/
public function __construct($name, SessionHandlerInterface $handler, $id = null)
{
$this->setId($id);
$this->name = $name;
$this->handler = $handler;
}
/**
* Start the session, reading the data from a handler.
*
* @return bool
*/
public function start()
{
$this->loadSession();
if (! $this->has('_token')) {
$this->regenerateToken();
}
return $this->started = true;
}
/**
* Load the session data from the handler.
*
* @return void
*/
protected function loadSession()
{
$this->attributes = array_merge($this->attributes, $this->readFromHandler());
}
/**
* Read the session data from the handler.
*
* @return array
*/
protected function readFromHandler()
{
if ($data = $this->handler->read($this->getId())) {
$data = @unserialize($this->prepareForUnserialize($data));
if ($data !== false && ! is_null($data) && is_array($data)) {
return $data;
}
}
return [];
}
/**
* Prepare the raw string data from the session for unserialization.
*
* @param string $data
* @return string
*/
protected function prepareForUnserialize($data)
{
return $data;
}
/**
* Save the session data to storage.
*
* @return void
*/
public function save()
{
$this->ageFlashData();
$this->handler->write($this->getId(), $this->prepareForStorage(
serialize($this->attributes)
));
$this->started = false;
}
/**
* Prepare the serialized session data for storage.
*
* @param string $data
* @return string
*/
protected function prepareForStorage($data)
{
return $data;
}
/**
* Age the flash data for the session.
*
* @return void
*/
public function ageFlashData()
{
$this->forget($this->get('_flash.old', []));
$this->put('_flash.old', $this->get('_flash.new', []));
$this->put('_flash.new', []);
}
/**
* Get all of the session data.
*
* @return array
*/
public function all()
{
return $this->attributes;
}
/**
* Get a subset of the session data.
*
* @param array $keys
* @return array
*/
public function only(array $keys)
{
return Arr::only($this->attributes, $keys);
}
/**
* Checks if a key exists.
*
* @param string|array $key
* @return bool
*/
public function exists($key)
{
$placeholder = new stdClass;
return ! collect(is_array($key) ? $key : func_get_args())->contains(function ($key) use ($placeholder) {
return $this->get($key, $placeholder) === $placeholder;
});
}
/**
* Determine if the given key is missing from the session data.
*
* @param string|array $key
* @return bool
*/
public function missing($key)
{
return ! $this->exists($key);
}
/**
* Checks if a key is present and not null.
*
* @param string|array $key
* @return bool
*/
public function has($key)
{
return ! collect(is_array($key) ? $key : func_get_args())->contains(function ($key) {
return is_null($this->get($key));
});
}
/**
* Get an item from the session.
*
* @param string $key
* @param mixed $default
* @return mixed
*/
public function get($key, $default = null)
{
return Arr::get($this->attributes, $key, $default);
}
/**
* Get the value of a given key and then forget it.
*
* @param string $key
* @param mixed $default
* @return mixed
*/
public function pull($key, $default = null)
{
return Arr::pull($this->attributes, $key, $default);
}
/**
* Determine if the session contains old input.
*
* @param string|null $key
* @return bool
*/
public function hasOldInput($key = null)
{
$old = $this->getOldInput($key);
return is_null($key) ? count($old) > 0 : ! is_null($old);
}
/**
* Get the requested item from the flashed input array.
*
* @param string|null $key
* @param mixed $default
* @return mixed
*/
public function getOldInput($key = null, $default = null)
{
return Arr::get($this->get('_old_input', []), $key, $default);
}
/**
* Replace the given session attributes entirely.
*
* @param array $attributes
* @return void
*/
public function replace(array $attributes)
{
$this->put($attributes);
}
/**
* Put a key / value pair or array of key / value pairs in the session.
*
* @param string|array $key
* @param mixed $value
* @return void
*/
public function put($key, $value = null)
{
if (! is_array($key)) {
$key = [$key => $value];
}
foreach ($key as $arrayKey => $arrayValue) {
Arr::set($this->attributes, $arrayKey, $arrayValue);
}
}
/**
* Get an item from the session, or store the default value.
*
* @param string $key
* @param \Closure $callback
* @return mixed
*/
public function remember($key, Closure $callback)
{
if (! is_null($value = $this->get($key))) {
return $value;
}
return tap($callback(), function ($value) use ($key) {
$this->put($key, $value);
});
}
/**
* Push a value onto a session array.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function push($key, $value)
{
$array = $this->get($key, []);
$array[] = $value;
$this->put($key, $array);
}
/**
* Increment the value of an item in the session.
*
* @param string $key
* @param int $amount
* @return mixed
*/
public function increment($key, $amount = 1)
{
$this->put($key, $value = $this->get($key, 0) + $amount);
return $value;
}
/**
* Decrement the value of an item in the session.
*
* @param string $key
* @param int $amount
* @return int
*/
public function decrement($key, $amount = 1)
{
return $this->increment($key, $amount * -1);
}
/**
* Flash a key / value pair to the session.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function flash(string $key, $value = true)
{
$this->put($key, $value);
$this->push('_flash.new', $key);
$this->removeFromOldFlashData([$key]);
}
/**
* Flash a key / value pair to the session for immediate use.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function now($key, $value)
{
$this->put($key, $value);
$this->push('_flash.old', $key);
}
/**
* Reflash all of the session flash data.
*
* @return void
*/
public function reflash()
{
$this->mergeNewFlashes($this->get('_flash.old', []));
$this->put('_flash.old', []);
}
/**
* Reflash a subset of the current flash data.
*
* @param array|mixed $keys
* @return void
*/
public function keep($keys = null)
{
$this->mergeNewFlashes($keys = is_array($keys) ? $keys : func_get_args());
$this->removeFromOldFlashData($keys);
}
/**
* Merge new flash keys into the new flash array.
*
* @param array $keys
* @return void
*/
protected function mergeNewFlashes(array $keys)
{
$values = array_unique(array_merge($this->get('_flash.new', []), $keys));
$this->put('_flash.new', $values);
}
/**
* Remove the given keys from the old flash data.
*
* @param array $keys
* @return void
*/
protected function removeFromOldFlashData(array $keys)
{
$this->put('_flash.old', array_diff($this->get('_flash.old', []), $keys));
}
/**
* Flash an input array to the session.
*
* @param array $value
* @return void
*/
public function flashInput(array $value)
{
$this->flash('_old_input', $value);
}
/**
* Remove an item from the session, returning its value.
*
* @param string $key
* @return mixed
*/
public function remove($key)
{
return Arr::pull($this->attributes, $key);
}
/**
* Remove one or many items from the session.
*
* @param string|array $keys
* @return void
*/
public function forget($keys)
{
Arr::forget($this->attributes, $keys);
}
/**
* Remove all of the items from the session.
*
* @return void
*/
public function flush()
{
$this->attributes = [];
}
/**
* Flush the session data and regenerate the ID.
*
* @return bool
*/
public function invalidate()
{
$this->flush();
return $this->migrate(true);
}
/**
* Generate a new session identifier.
*
* @param bool $destroy
* @return bool
*/
public function regenerate($destroy = false)
{
return tap($this->migrate($destroy), function () {
$this->regenerateToken();
});
}
/**
* Generate a new session ID for the session.
*
* @param bool $destroy
* @return bool
*/
public function migrate($destroy = false)
{
if ($destroy) {
$this->handler->destroy($this->getId());
}
$this->setExists(false);
$this->setId($this->generateSessionId());
return true;
}
/**
* Determine if the session has been started.
*
* @return bool
*/
public function isStarted()
{
return $this->started;
}
/**
* Get the name of the session.
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set the name of the session.
*
* @param string $name
* @return void
*/
public function setName($name)
{
$this->name = $name;
}
/**
* Get the current session ID.
*
* @return string
*/
public function getId()
{
return $this->id;
}
/**
* Set the session ID.
*
* @param string $id
* @return void
*/
public function setId($id)
{
$this->id = $this->isValidId($id) ? $id : $this->generateSessionId();
}
/**
* Determine if this is a valid session ID.
*
* @param string $id
* @return bool
*/
public function isValidId($id)
{
return is_string($id) && ctype_alnum($id) && strlen($id) === 40;
}
/**
* Get a new, random session ID.
*
* @return string
*/
protected function generateSessionId()
{
return Str::random(40);
}
/**
* Set the existence of the session on the handler if applicable.
*
* @param bool $value
* @return void
*/
public function setExists($value)
{
if ($this->handler instanceof ExistenceAwareInterface) {
$this->handler->setExists($value);
}
}
/**
* Get the CSRF token value.
*
* @return string
*/
public function token()
{
return $this->get('_token');
}
/**
* Regenerate the CSRF token value.
*
* @return void
*/
public function regenerateToken()
{
$this->put('_token', Str::random(40));
}
/**
* Get the previous URL from the session.
*
* @return string|null
*/
public function previousUrl()
{
return $this->get('_previous.url');
}
/**
* Set the "previous" URL in the session.
*
* @param string $url
* @return void
*/
public function setPreviousUrl($url)
{
$this->put('_previous.url', $url);
}
/**
* Specify that the user has confirmed their password.
*
* @return void
*/
public function passwordConfirmed()
{
$this->put('auth.password_confirmed_at', time());
}
/**
* Get the underlying session handler implementation.
*
* @return \SessionHandlerInterface
*/
public function getHandler()
{
return $this->handler;
}
/**
* Determine if the session handler needs a request.
*
* @return bool
*/
public function handlerNeedsRequest()
{
return $this->handler instanceof CookieSessionHandler;
}
/**
* Set the request on the handler instance.
*
* @param \Illuminate\Http\Request $request
* @return void
*/
public function setRequestOnHandler($request)
{
if ($this->handlerNeedsRequest()) {
$this->handler->setRequest($request);
}
}
}