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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\ObjectManager\Profiler;
use Magento\Framework\ObjectManager\Profiler\Tree\Item as Item;
/**
* Class Log
*/
class Log
{
/**
* @var self
*/
protected static $instance;
/**
* @var Item
*/
protected $currentItem = null;
/**
* @var array
*/
protected $data = [];
/**
* @var array
*/
protected $roots = [];
/**
* @var array
*/
protected $used = [];
/**
* @var array
*/
protected $stats = ['total' => 0, 'used' => 0, 'unused' => 0];
/**
* Constructor
*/
public function __construct()
{
register_shutdown_function([$this, 'display']);
}
/**
* Retrieve instance
*
* @return Log
*/
public static function getInstance()
{
if (!self::$instance) {
self::$instance = new Log();
}
return self::$instance;
}
/**
* Log object instantiation
*
* @param string $class
* @return void
*/
public function startCreating($class)
{
$this->stats['total']++;
$parent = empty($this->currentItem) ? null : $this->currentItem;
$item = new Item($class, $parent);
if (!$parent) {
$this->roots[] = $item;
}
$this->currentItem = $item;
}
/**
* Log object instantiation
*
* @param mixed $object
* @return void
*/
public function stopCreating($object)
{
$this->currentItem->setHash(spl_object_hash($object));
$this->currentItem = $this->currentItem->getParent();
}
/**
* Monitor object
*
* @param mixed $object
* @return void
*/
public function add($object)
{
$this->stats['total']++;
if ($this->currentItem) {
$item = new Item(get_class($object), $this->currentItem);
$this->currentItem->addChild($item);
} else {
$item = new Item(get_class($object), null);
$this->roots[] = $item;
}
$item->setHash(spl_object_hash($object));
}
/**
* Object was invoked
*
* @param mixed $object
* @return void
*/
public function invoked($object)
{
$this->used[spl_object_hash($object)] = 1;
}
/**
* Display results
*
* @return void
*/
public function display()
{
$this->stats['used'] = count($this->used);
$this->stats['unused'] = $this->stats['total'] - $this->stats['used'];
echo '<table border="1" cellspacing="0" cellpadding="2">',
'<thead><tr><th>',
"Creation chain (Red items are never used) Total: {$this->stats['total']}\n",
"Used: {$this->stats['used']} Not used: {$this->stats['unused']}",
'</th></tr></thead>',
'<tbody>',
'<tr><th>Instance class</th></tr>';
foreach ($this->roots as $root) {
$this->displayItem($root);
}
echo '</tbody></table>';
}
/**
* Display item
*
* @param Item $item
* @param int $level
* @return void
*/
protected function displayItem(Item $item, $level = 0)
{
$colorStyle = isset($this->used[$item->getHash()]) ? '' : ' style="color:red" ';
echo "<tr><td $colorStyle>" . str_repeat('· ', $level) . $item->getClass()
. ' - ' . $item->getHash() . '</td></tr>';
foreach ($item->getChildren() as $child) {
$this->displayItem($child, $level + 1);
}
}
}