<?php
namespace Concrete\Core\Permission;

use Loader;
use \Concrete\Core\Permission\Response\Response as PermissionResponse;
use \Concrete\Core\Permission\Key\Key as PermissionKey;

class Checker
{

    public $error;

    /** @var PermissionResponse */
    protected $response;

    /**
     * Checks to see if there is a fatal error with this particular permission call.
     */
    public function isError()
    {
        return $this->error != '';
    }

    /**
     * Returns the error code if there is one
     */
    public function getError()
    {
        return $this->error;
    }

    /**
     * Legacy
     * @private
     */
    public function getOriginalObject()
    {
        return $this->response->getPermissionObject();
    }


    public function __construct($object = false)
    {
        if ($object) {
            $this->response = PermissionResponse::getResponse($object);
            $r = $this->response->testForErrors();
            if ($r) {
                $this->error = $r;
            }
        }
    }

    public function getResponseObject()
    {
        return $this->response;
    }

    /**
     * We take any permissions function run on the permissions class and send it into the category object
     */
    public function __call($f, $a)
    {
        if (!is_object($this->response)) {
            // handles task permissions
            $permission = Loader::helper('text')->uncamelcase($f);
        }

        if (count($a) > 0) {
            if (is_object($this->response)) {
                $r = call_user_func_array(array($this->response, $f), $a);
            } else {
                $pk = PermissionKey::getByHandle($permission);
                $r = call_user_func_array(array($pk, $f), $a);
            }
        } elseif (is_object($this->response)) {
            $r = $this->response->{$f}();
        } else {
            $pk = PermissionKey::getByHandle($permission);
            if (is_object($pk)) {
                $r = $pk->validate();
            } else {
                throw new \Exception(t('Unable to get permission key for %s', $permission));
            }
        }

        if (is_array($r) || is_object($r)) {
            return $r;
        } elseif ($r) {
            return 1;
        } else {
            return 0;
        }
    }

}