<?php
/**
* @version	$Id: ClassDetector.php 16252 2015-09-27 06:34:45Z alex $
* @package	In-Portal
* @copyright	Copyright (C) 1997 - 2015 Intechnic. All rights reserved.
* @license      GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/

namespace InPortal\Core\kernel\utility\ClassDiscovery;


use PhpParser\Node;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassLike;
use PhpParser\Node\Stmt\Interface_;
use PhpParser\Node\Stmt\Trait_;
use PhpParser\NodeVisitorAbstract;

defined('FULL_PATH') or die('restricted access!');

class ClassDetector extends NodeVisitorAbstract
{

	/**
	 * List of classes, discovered by the visitor.
	 *
	 * @var array
	 */
	protected $classes = array();

	/**
	 * Class map builder.
	 *
	 * @var ClassMapBuilder
	 */
	protected $classMapBuilder;

	/**
	 * Creates class detector instance.
	 *
	 * @param ClassMapBuilder $class_map_builder Class map builder.
	 */
	public function __construct(ClassMapBuilder $class_map_builder)
	{
		$this->classMapBuilder = $class_map_builder;
	}

	/**
	 * Remembers all encountered classes.
	 *
	 * @param Node $node Node.
	 *
	 * @return void
	 */
	public function enterNode(Node $node)
	{
		if ( $node instanceof ClassLike ) {
			$class_info = array();

			if ( $node instanceof Class_ ) {
				$class_info['type'] = \kFactory::TYPE_CLASS;
				$class_info['modifiers'] = 0;

				if ( $node->isAbstract() ) {
					$class_info['modifiers'] |= \kFactory::MODIFIER_ABSTRACT;
				}

				if ( $node->isFinal() ) {
					$class_info['modifiers'] |= \kFactory::MODIFIER_FINAL;
				}

				$extends = array();

				if ( $node->extends ) {
					$extends[] = (string)$node->extends;
				}

				if ( $node->implements ) {
					foreach ( $node->implements as $interface ) {
						$extends[] = (string)$interface;
					}
				}

				if ( $extends ) {
					$class_info['extends'] = $extends;
				}
			}
			elseif ( $node instanceof Interface_ ) {
				$class_info['type'] = \kFactory::TYPE_INTERFACE;

				if ( $node->extends ) {
					$extends = array();

					foreach ( $node->extends as $interface ) {
						$extends[] = (string)$interface;
					}

					$class_info['extends'] = $extends;
				}
			}
			elseif ( $node instanceof Trait_ ) {
				$class_info['type'] = \kFactory::TYPE_TRAIT;
			}

			$this->classMapBuilder->addClass((string)$node->namespacedName, $class_info);
		}
	}

}