<?php

/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2002-2008 (original work) Public Research Centre Henri Tudor & University of Luxembourg (under the project TAO & TAO2);
 *               2008-2010 (update and modification) Deutsche Institut für Internationale Pädagogische Forschung (under the project TAO-TRANSFER);
 *               2009-2012 (update and modification) Public Research Centre Henri Tudor (under the project TAO-SUSTAIN & TAO-DEV);
 *
 */

use oat\generis\model\OntologyRdfs;
use tao_helpers_form_FormContainer as FormContainer;

/**
 * SaSItems Controller provide process services for in the Items
 *
 * @author Bertrand Chevrier, <taosupport@tudor.lu>
 * @package taoItems

 * @license GPLv2  http://www.opensource.org/licenses/gpl-2.0.php
 */
class taoItems_actions_SaSItems extends taoItems_actions_Items
{

    /**
     * overrided to prevent exception:
     * if no class is selected, the root class is returned
     * @see TaoModule::getCurrentClass()
     * @return core_kernel_classes_Class
     */
    protected function getCurrentClass()
    {
        if ($this->hasRequestParameter('classUri')) {
            return parent::getCurrentClass();
        }
        return $this->getRootClass();
    }

    /**
     * Edit an instances
     * @return void
     */
    public function sasEditInstance()
    {
        $this->loadStandaloneMode();

        $clazz = $this->getCurrentClass();
        $instance = $this->getCurrentInstance();

        $formContainer = new tao_actions_form_Instance($clazz, $instance, [FormContainer::CSRF_PROTECTION_OPTION => true]);
        $myForm = $formContainer->getForm();

        if ($myForm->isSubmited() && $myForm->isValid()) {
            $binder = new tao_models_classes_dataBinding_GenerisFormDataBinder($instance);
            $instance = $binder->bind($myForm->getValues());
            $instance = $this->getClassService()->setDefaultItemContent($instance);
            $this->setData('message', __('Item saved'));
        }

        $this->setData('uri', tao_helpers_Uri::encode($instance->getUri()));
        $this->setData('classUri', tao_helpers_Uri::encode($clazz->getUri()));
        $this->setData('formTitle', __('Edit item'));
        $this->setData('myForm', $myForm->render());
        $this->setView('form.tpl', 'tao');
    }

    /**
     * view and item
     * @throws common_exception_BadRequest
     * @throws common_exception_Error
     * @throws tao_models_classes_MissingRequestParameterException
     * @return void
     */
    public function viewItem()
    {
        $this->loadStandaloneMode();

        if (!$this->isXmlHttpRequest()) {
            throw new common_exception_BadRequest('wrong request mode');
        }

        $itemClass = $this->getCurrentClass();
        $item = $this->getCurrentInstance();

        $lang = null;
        if ($this->hasRequestParameter('target_lang')) {
            $lang = $this->getRequestParameter('target_lang');
        }

        $hiddenProperties = [
            taoItems_models_classes_ItemsService::PROPERTY_ITEM_CONTENT
        ];

        $properties = [];
        foreach ($this->getClassService()->getClazzProperties($itemClass) as $property) {
            if (in_array($property->getUri(), $hiddenProperties)) {
                continue;
            }
            $range = $property->getRange();

            if (is_null($lang)) {
                $propValues = $item->getPropertyValues($property);
            } else {
                $propContainer = $item->getPropertyValuesByLg($property, $lang);
                $propValues = $propContainer->getIterator();
            }
            foreach ($propValues as $propValue) {
                if ($range->getUri() == OntologyRdfs::RDFS_LITERAL) {
                    $value = (string)$propValue;
                } else {
                    $resource = new core_kernel_classes_Resource($propValue);
                    $value = $resource->getLabel();
                }
                $properties[] = [
                    'name'  => $property->getLabel(),
                    'value' => $value
                ];
            }
        }

        $previewData = $this->initPreview($item, $itemClass);
        if (count($previewData) == 0) {
            $this->setData('preview', false);
            $this->setData('previewMsg', __('Not yet available'));
        } else {
            $this->setData('preview', true);
            $this->setData('instanceUri', tao_helpers_Uri::encode($item->getUri(), false));
            foreach ($previewData as $key => $value) {
                $this->setData($key, $value);
            }
        }

        $this->setData('uri', tao_helpers_Uri::encode($item->getUri()));
        $this->setData('classUri', tao_helpers_Uri::encode($itemClass->getUri()));

        $this->setData('label', $item->getLabel());
        $this->setData('itemProperties', $properties);
        $this->setView('view.tpl');
    }

    /**
     * Load the standalone mode
     */
    protected function loadStandaloneMode()
    {
        tao_helpers_Context::load('STANDALONE_MODE');
    }
}