/concrete/core/models/permission/keys/custom/add_file.php

<?php 

defined('C5_EXECUTE') or die("Access Denied.");



class Concrete5_Model_AddFileFileSetPermissionKey extends FileSetPermissionKey  {



	public function getAllowedFileExtensions() {

		$u = new User();



		$extensions = array();

		if ($u->isSuperUser()) {

			$extensions = Loader::helper('concrete/file')->getAllowedFileExtensions();

			return $extensions;

		}



		$pae = $this->getPermissionAccessObject();

		if (!is_object($pae)) {

			return array();

		}

	

		$accessEntities = $u->getUserAccessEntityObjects();

		$accessEntities = $pae->validateAndFilterAccessEntities($accessEntities);

		$list = $this->getAccessListItems(FileSetPermissionKey::ACCESS_TYPE_ALL, $accessEntities);

		$list = PermissionDuration::filterByActive($list);



		foreach($list as $l) {

			if ($l->getFileTypesAllowedPermission() == 'N') {

				$extensions = array();

			}

			if ($l->getFileTypesAllowedPermission() == 'C') {

				$extensions = array_unique(array_merge($extensions, $l->getFileTypesAllowedArray()));

			}

			if ($l->getFileTypesAllowedPermission() == 'A') {

				$extensions = Loader::helper('concrete/file')->getAllowedFileExtensions();

			}

		}

		

		return $extensions;

	}

	

	public function validate($extension = false) {

		$extensions = $this->getAllowedFileExtensions();

		if ($ext != false) {

			return in_array($extension, $extensions);

		} else {

			return count($extensions) > 0;

		}

	}

	



}