src/AppBundle/Extension/CopyExtension.php

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<?php

namespace AppBundle\Extension;

use Pimple\Container;
use Pimple\ServiceProviderInterface;

class CopyExtension extends Extension implements ServiceProviderInterface
{
    /**
     * {@inheritdoc}
     */
    public function register(Container $biz)
    {
        $self = $this;

        $copyNodes = array(
            'course_copy' => 'generateCourseNodes',
            'classroom_course_copy' => 'generateClassroomNodes',
            'course_set_courses_copy' => 'generateCourseSetCoursesCopy',
        );

        foreach ($copyNodes as $key => $copyNode) {
            $biz[$key] = function ($biz) use ($self, $copyNode) {
                $copyNode = call_user_func(array($self, $copyNode));
                $copyClass = $copyNode['class'];

                return new $copyClass($biz, $copyNode);
            };
        }
    }

    public function generateCourseNodes()
    {
        return array(
            'class' => 'Biz\Course\Copy\Entry\CourseCopy',
            'children' => array(
                'course-member' => array(
                    'class' => 'Biz\Course\Copy\Chain\CourseMemberCopy',
                ),
                'task' => array(
                    'class' => 'Biz\Course\Copy\Chain\TaskCopy',
                ),
            ),
        );
    }

    public function generateClassroomNodes()
    {
        return array(
            'class' => 'Biz\Course\Copy\Entry\ClassroomCourseCopy',
            'children' => array(
                'material' => array(
                    'class' => 'Biz\Course\Copy\Chain\CourseMaterialCopy',
                    'priority' => 100,
                ),
                'course-member' => array(
                    'class' => 'Biz\Course\Copy\Chain\CourseMemberCopy',
                    'priority' => 90,
                ),