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<?php
/*
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\Auth\Cache;
use Psr\Cache\CacheItemInterface;
use Psr\Cache\CacheItemPoolInterface;
/**
* Simple in-memory cache implementation.
*/
final class MemoryCacheItemPool implements CacheItemPoolInterface
{
/**
* @var CacheItemInterface[]
*/
private $items;
/**
* @var CacheItemInterface[]
*/
private $deferredItems;
/**
* {@inheritdoc}
*/
public function getItem($key)
{
return current($this->getItems([$key]));
}
/**
* {@inheritdoc}
*/
public function getItems(array $keys = [])
{
$items = [];
foreach ($keys as $key) {
$items[$key] = $this->hasItem($key) ? clone $this->items[$key] : new Item($key);
}
return $items;
}
/**
* {@inheritdoc}
*/
public function hasItem($key)
{
$this->isValidKey($key);
return isset($this->items[$key]) && $this->items[$key]->isHit();
}
/**
* {@inheritdoc}
*/
public function clear()
{
$this->items = [];
$this->deferredItems = [];
return true;
}
/**
* {@inheritdoc}
*/
public function deleteItem($key)
{
return $this->deleteItems([$key]);
}
/**
* {@inheritdoc}
*/
public function deleteItems(array $keys)
{
array_walk($keys, [$this, 'isValidKey']);
foreach ($keys as $key) {
unset($this->items[$key]);
}
return true;
}
/**
* {@inheritdoc}
*/
public function save(CacheItemInterface $item)
{
$this->items[$item->getKey()] = $item;
return true;
}
/**
* {@inheritdoc}
*/
public function saveDeferred(CacheItemInterface $item)
{
$this->deferredItems[$item->getKey()] = $item;
return true;
}
/**
* {@inheritdoc}
*/
public function commit()
{
foreach ($this->deferredItems as $item) {
$this->save($item);
}
$this->deferredItems = [];
return true;
}
/**
* Determines if the provided key is valid.
*
* @param string $key
* @return bool
* @throws InvalidArgumentException
*/
private function isValidKey($key)
{
$invalidCharacters = '{}()/\\\\@:';
if (!is_string($key) || preg_match("#[$invalidCharacters]#", $key)) {
throw new InvalidArgumentException('The provided key is not valid: ' . var_export($key, true));
}
return true;
}
}