<?php
/**
 * Virtual File System: Access Control Rule: DenyFileOfUser
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @package WB
 * @subpackage vfs
 */

WBClass::load('WBVFS_AccessControlRule');

/**
 * Virtual File System: Access Control Rule: DenyFileOfUser
 *
 * Check permission denied if file is owned by one of listed users' (id).
 *
 * Configuration example:
 *  - uid => array(123, 345, ...) // uid is array of ids
 *  - group => '' // group name like staff
 *
 * @version 0.1.1
 * @package WB
 * @subpackage vfs
 */
class WBVFS_AccessControlRule_DenyFileOfUser extends WBVFS_AccessControlRule
{
    const USER_PRIMARY  =   'uid';

    /**
     * 2nc Constructor
     *
     * Called after configuration was set
     */
    protected function init()
    {
        // normalize config
        if (empty($this->config[self::USER_PRIMARY])) {
            $this->config[self::USER_PRIMARY]    =   array();
        }
        if (!is_array($this->config[self::USER_PRIMARY])) {
            $this->config[self::USER_PRIMARY]    =   array($this->config[self::USER_PRIMARY]);
        }
        if (empty($this->config['group'])) {
            $this->config['group']  =   '';
        }
    }

    /**
     * Check Permissions 4 Request
     *
     * @param WBRequest
     * @return bool
     */
    public function isRequestGranted($req)
    {
        if (empty($this->config[self::USER_PRIMARY])) {
            $this->log->debug($this->getLogMsg($this::GRANT_ALLOW, 'Empty config'));
            return true;
        }

        $uid    =   $this->file->getUserId();
        if (!in_array($uid, $this->config[self::USER_PRIMARY])) {
            return true;
        }

        /** @var WBUser_Auth */
        $user   =   WBUser::getCurrent();

        // any group
        if (empty($this->config['group']) && $user->isAuthenticated()) {
            $this->log->debug($this->getLogMsg($this::GRANT_ALLOW, sprintf('File %s - current user %s authenticated', $this->file->getId(), $user->getId())));
            return true;
        }

        // specific group
        if ($user->isInGroup($this->config['group'])) {
            $this->log->debug($this->getLogMsg($this::GRANT_ALLOW, sprintf('File %s - current user %s in group %s', $this->file->getId(), $user->getId(), $this->config['group'])));
            return true;
        }

        $this->log->debug($this->getLogMsg($this::GRANT_DENY, sprintf('File %s - current user %s not in group %s', $this->file->getId(), $user->getId(), $this->config['group'])));
        return false;
    }
}