<?php

namespace PhpOffice\PhpSpreadsheet\Writer\Ods;

/**
 * Copyright (c) 2006 - 2015 PhpSpreadsheet.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category   PhpSpreadsheet
 *
 * @copyright  Copyright (c) 2006 - 2015 PhpSpreadsheet (https://github.com/PHPOffice/PhpSpreadsheet)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 */
class Settings extends WriterPart
{
    /**
     * Write settings.xml to XML format.
     *
     * @param \PhpOffice\PhpSpreadsheet\Spreadsheet $spreadsheet
     *
     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
     *
     * @return string XML Output
     */
    public function write(\PhpOffice\PhpSpreadsheet\SpreadSheet $spreadsheet = null)
    {
        if (!$spreadsheet) {
            $spreadsheet = $this->getParentWriter()->getSpreadsheet();
        }

        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new \PhpOffice\PhpSpreadsheet\Shared\XMLWriter(\PhpOffice\PhpSpreadsheet\Shared\XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new \PhpOffice\PhpSpreadsheet\Shared\XMLWriter(\PhpOffice\PhpSpreadsheet\Shared\XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8');

        // Settings
        $objWriter->startElement('office:document-settings');
        $objWriter->writeAttribute('xmlns:office', 'urn:oasis:names:tc:opendocument:xmlns:office:1.0');
        $objWriter->writeAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
        $objWriter->writeAttribute('xmlns:config', 'urn:oasis:names:tc:opendocument:xmlns:config:1.0');
        $objWriter->writeAttribute('xmlns:ooo', 'http://openoffice.org/2004/office');
        $objWriter->writeAttribute('office:version', '1.2');

        $objWriter->startElement('office:settings');
        $objWriter->startElement('config:config-item-set');
        $objWriter->writeAttribute('config:name', 'ooo:view-settings');
        $objWriter->startElement('config:config-item-map-indexed');
        $objWriter->writeAttribute('config:name', 'Views');
        $objWriter->endElement();
        $objWriter->endElement();
        $objWriter->startElement('config:config-item-set');
        $objWriter->writeAttribute('config:name', 'ooo:configuration-settings');
        $objWriter->endElement();
        $objWriter->endElement();
        $objWriter->endElement();

        return $objWriter->getData();
    }
}