<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zf2 for the canonical source repository
 * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Zend\InputFilter;

use Zend\ServiceManager\AbstractPluginManager;
use Zend\ServiceManager\ConfigInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use Zend\Stdlib\InitializableInterface;

/**
 * Plugin manager implementation for input filters.
 */
class InputFilterPluginManager extends AbstractPluginManager
{
    /**
     * Default set of plugins
     *
     * @var array
     */
    protected $invokableClasses = array(
        'inputfilter' => 'Zend\InputFilter\InputFilter',
        'collection'  => 'Zend\InputFilter\CollectionInputFilter',
    );

    /**
     * Whether or not to share by default
     *
     * @var bool
     */
    protected $shareByDefault = false;

    /**
     * @param ConfigInterface $configuration
     */
    public function __construct(ConfigInterface $configuration = null)
    {
        parent::__construct($configuration);

        $this->addInitializer(array($this, 'populateFactory'));
    }

    /**
     * Inject this and populate the factory with filter chain and validator chain
     *
     * @param $inputfilter
     */
    public function populateFactory($inputfilter)
    {
        if ($inputfilter instanceof InputFilter) {
            $factory = $inputfilter->getFactory();

            $factory->setInputFilterManager($this);

            if ($this->serviceLocator instanceof ServiceLocatorInterface) {
                $factory->getDefaultFilterChain()->setPluginManager($this->serviceLocator->get('FilterManager'));
                $factory->getDefaultValidatorChain()->setPluginManager($this->serviceLocator->get('ValidatorManager'));
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    public function validatePlugin($plugin)
    {
        if ($plugin instanceof InputFilterInterface) {
            // Hook to perform various initialization, when the inputfilter is not created through the factory
            if ($plugin instanceof InitializableInterface) {
                $plugin->init();
            }

            // we're okay
            return;
        }

        throw new Exception\RuntimeException(sprintf(
            'Plugin of type %s is invalid; must implement Zend\InputFilter\InputFilterInterface',
            (is_object($plugin) ? get_class($plugin) : gettype($plugin))
        ));
    }
}