<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */
declare (strict_types=1);
namespace Packetery\Nette\Http;

use Packetery\Nette;
/**
 * Session section.
 */
class SessionSection implements \IteratorAggregate, \ArrayAccess
{
    use \Packetery\Nette\SmartObject;
    /** @var bool */
    public $warnOnUndefined = \false;
    /** @var Session */
    private $session;
    /** @var string */
    private $name;
    /**
     * Do not call directly. Use Session::getSection().
     */
    public function __construct(Session $session, string $name)
    {
        $this->session = $session;
        $this->name = $name;
    }
    /**
     * Returns an iterator over all section variables.
     */
    public function getIterator() : \Iterator
    {
        $this->session->autoStart(\false);
        return new \ArrayIterator($this->getData() ?? []);
    }
    /**
     * Sets a variable in this session section.
     * @param  mixed  $value
     */
    public function set(string $name, $value, ?string $expire = null) : void
    {
        if ($value === null) {
            $this->remove($name);
        } else {
            $this->session->autoStart(\true);
            $this->getData()[$name] = $value;
            $this->setExpiration($expire, $name);
        }
    }
    /**
     * Gets a variable from this session section.
     * @return mixed
     */
    public function get(string $name)
    {
        if (\func_num_args() > 1) {
            throw new \ArgumentCountError(__METHOD__ . '() expects 1 arguments, given more.');
        }
        $this->session->autoStart(\false);
        return $this->getData()[$name] ?? null;
    }
    /**
     * Removes a variable or whole section.
     * @param  string|string[]|null  $name
     */
    public function remove($name = null) : void
    {
        $this->session->autoStart(\false);
        if (\func_num_args() > 1) {
            throw new \ArgumentCountError(__METHOD__ . '() expects at most 1 arguments, given more.');
        } elseif (\func_num_args()) {
            $data =& $this->getData();
            $meta =& $this->getMeta();
            foreach ((array) $name as $name) {
                unset($data[$name], $meta[$name]);
            }
        } else {
            unset($_SESSION['__NF']['DATA'][$this->name], $_SESSION['__NF']['META'][$this->name]);
        }
    }
    /**
     * Sets a variable in this session section.
     * @deprecated  use set() instead
     */
    public function __set(string $name, $value) : void
    {
        $this->session->autoStart(\true);
        $this->getData()[$name] = $value;
    }
    /**
     * Gets a variable from this session section.
     * @deprecated  use get() instead
     */
    public function &__get(string $name)
    {
        $this->session->autoStart(\true);
        $data =& $this->getData();
        if ($this->warnOnUndefined && !\array_key_exists($name, $data ?? [])) {
            \trigger_error("The variable '{$name}' does not exist in session section");
        }
        return $data[$name];
    }
    /**
     * Determines whether a variable in this session section is set.
     * @deprecated  use get() instead
     */
    public function __isset(string $name) : bool
    {
        $this->session->autoStart(\false);
        return isset($this->getData()[$name]);
    }
    /**
     * Unsets a variable in this session section.
     * @deprecated  use remove() instead
     */
    public function __unset(string $name) : void
    {
        $this->remove($name);
    }
    /**
     * Sets a variable in this session section.
     * @deprecated  use set() instead
     */
    public function offsetSet($name, $value) : void
    {
        $this->__set($name, $value);
    }
    /**
     * Gets a variable from this session section.
     * @deprecated  use get() instead
     */
    #[\ReturnTypeWillChange]
    public function offsetGet($name)
    {
        return $this->get($name);
    }
    /**
     * Determines whether a variable in this session section is set.
     * @deprecated  use get() instead
     */
    public function offsetExists($name) : bool
    {
        return $this->__isset($name);
    }
    /**
     * Unsets a variable in this session section.
     * @deprecated  use remove() instead
     */
    public function offsetUnset($name) : void
    {
        $this->remove($name);
    }
    /**
     * Sets the expiration of the section or specific variables.
     * @param  ?string  $expire
     * @param  string|string[]|null  $variables  list of variables / single variable to expire
     * @return static
     */
    public function setExpiration($expire, $variables = null)
    {
        $this->session->autoStart((bool) $expire);
        $meta =& $this->getMeta();
        if ($expire) {
            $expire = \Packetery\Nette\Utils\DateTime::from($expire)->format('U');
            $max = (int) \ini_get('session.gc_maxlifetime');
            if ($max !== 0 && $expire - \time() > $max + 3) {
                \trigger_error("The expiration time is greater than the session expiration {$max} seconds");
            }
        }
        foreach (\is_array($variables) ? $variables : [$variables] as $variable) {
            $meta[$variable]['T'] = $expire ?: null;
        }
        return $this;
    }
    /**
     * Removes the expiration from the section or specific variables.
     * @param  string|string[]|null  $variables  list of variables / single variable to expire
     */
    public function removeExpiration($variables = null) : void
    {
        $this->setExpiration(null, $variables);
    }
    private function &getData()
    {
        return $_SESSION['__NF']['DATA'][$this->name];
    }
    private function &getMeta()
    {
        return $_SESSION['__NF']['META'][$this->name];
    }
}
