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<?php
namespace Bitrix\Location\Common;
/**
* Class CachePool
* @package Bitrix\Location\Common
*/
class Pool
{
/** @var int */
protected $poolSize = 0;
/** @var array */
protected $items = [];
/**
* CachePool constructor.
* @param int $poolSize
* @param array $items
*/
public function __construct(int $poolSize)
{
$this->poolSize = $poolSize;
}
/**
* @return array
*/
public function getItems(): array
{
return $this->items;
}
public function cleanItems(): void
{
$this->items = [];
}
/**
* @param array $items
*/
public function setItems(array $items): void
{
$this->items = $items;
}
/**
* @param string $index
* @return mixed
*/
public function getItem(string $index)
{
$result = null;
if(isset($this->items[$index]))
{
$result = $this->items[$index];
//come up used items
unset($this->items[$index]);
$this->items[$index] = $result;
}
return $result;
}
/**
* @param string $index
* @param mixed $value
*/
public function addItem(string $index, $value): void
{
$this->items[$index] = $value;
$delta = count($this->items) - $this->poolSize;
if($delta > 0)
{
$this->items = $this->decreaseSize($delta, $this->items);
}
}
/**
* @return int
*/
public function getItemsCount(): int
{
return count($this->items);
}
/**
* @param string $index
*/
public function deleteItem(string $index): void
{
if(isset($this->items[$index]))
{
unset($this->items[$index]);
}
}
/**
* @param int $delta
* @param array $items
* @return array
*/
protected function decreaseSize(int $delta, array $items): array
{
if($delta <= 0 || count($items) <= 0)
{
return $items;
}
do
{
reset($items);
unset($items[key($items)]);
$delta--;
}
while($delta > 0);
return $items;
}
}