<?php declare(strict_types=1);
/**
 * MIT License
 * 
 * Copyright (c) 2021 Nicholas English
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

namespace Omatamix\SessionLock\Encryption;

use Omatamix\SessionLock\Encryption\Adapter\EncryptionAdapter as Adapter;
use SessionHandlerInterface;

/**
 * An encryption wrapper.
 */
class Encrypted implements SessionHandlerInterface
{
    /** @var \SessionHandlerInterface $handler The session handler. */
    private $handler;
 
    /** @var \Omatamix\SessionLock\Encryption\Adapter\EncryptionAdapter $adapter The encryption adapter. */
    private $adapter;

    /**
     * Wrap a session handler in an encryption handler.
     *
     * @param \SessionHandlerInterface                                   $handler The session handler.
     * @param \Omatamix\SessionLock\Encryption\Adapter\EncryptionAdapter $adapter The encryption adapter.
     *
     * @return void Returns nothing.
     */
    public function __construct(SessionHandlerInterface $handler, Adapter $adapter)
    {
        $this->handler = $handler;
        $this->adapter = $adapter;
    }
    /**
     * {@inheritdoc}
     */
    public function open($savePath, $sessionName)
    {
        return $this->handler->open($savePath, $sessionName);
    }

    /**
     * {@inheritdoc}
     */
    public function close()
    {
        return $this->handler->close();
    }

    /**
     * {@inheritdoc}
     */
    public function read($sessionId)
    {
        return $this->adapter->decrypt($this->handler->read($sessionId));
    }

    /**
     * {@inheritdoc}
     */
    public function write($sessionId, $data)
    {
        return $this->adapter->encrypt($this->handler->write($sessionId, $data));
    }

    /**
     * {@inheritdoc}
     */
    public function destroy($sessionId)
    {
        return $this->handler->destroy($sessionId);
    }

    /**
     * {@inheritdoc}
     */
    public function gc($lifetime)
    {
        return $this->handler->gc($lifetime);
    }
}