<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\Mview;

class Processor implements ProcessorInterface
{
/**
* @var View\CollectionFactory
*/
protected $viewsFactory;

/**
* @param View\CollectionFactory $viewsFactory
*/
public function __construct(View\CollectionFactory $viewsFactory)
{
$this->viewsFactory = $viewsFactory;
}

/**
* Return list of views by group
*
* @param string $group
* @return ViewInterface[]
*/
protected function getViewsByGroup($group = '')
{
$collection = $this->viewsFactory->create();
return $group ? $collection->getItemsByColumnValue('group', $group) : $collection->getItems();
}

/**
* Materialize all views by group (all views if empty)
*
* @param string $group
* @return void
*/
public function update($group = '')
{
foreach ($this->getViewsByGroup($group) as $view) {
$view->update();
}
}

/**
* Clear all views' changelogs by group (all views if empty)
*
* @param string $group
* @return void
*/
public function clearChangelog($group = '')
{
foreach ($this->getViewsByGroup($group) as $view) {
$view->clearChangelog();
}
}
}