<?php
/**
 * This file is part of PHPWord - A pure PHP library for reading and writing
 * word processing documents.
 *
 * PHPWord is free software distributed under the terms of the GNU Lesser
 * General Public License version 3 as published by the Free Software Foundation.
 *
 * For the full copyright and license information, please read the LICENSE
 * file that was distributed with this source code. For the full list of
 * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
 *
 * @link        https://github.com/PHPOffice/PHPWord
 * @copyright   2010-2014 PHPWord contributors
 * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
 */

namespace PhpOffice\PhpWord\Writer\Word2007\Element;

use PhpOffice\PhpWord\Element\AbstractContainer as ContainerElement;
use PhpOffice\PhpWord\Element\TextBreak as TextBreakElement;

/**
 * Container element writer (section, textrun, header, footnote, cell, etc.)
 *
 * @since 0.11.0
 */
class Container extends AbstractElement
{
    /**
     * Namespace; Can't use __NAMESPACE__ in inherited class (ODText)
     *
     * @var string
     */
    protected $namespace = 'PhpOffice\\PhpWord\\Writer\\Word2007\\Element';

    /**
     * Write element
     */
    public function write()
    {
        $container = $this->getElement();
        if (!$container instanceof ContainerElement) {
            return;
        }
        $containerClass = substr(get_class($container), strrpos(get_class($container), '\\') + 1);
        $withoutP = in_array($containerClass, array('TextRun', 'Footnote', 'Endnote', 'ListItemRun')) ? true : false;
        $xmlWriter = $this->getXmlWriter();

        // Loop through elements
        $elements = $container->getElements();
        $elementClass = '';
        foreach ($elements as $element) {
            $elementClass = substr(get_class($element), strrpos(get_class($element), '\\') + 1);
            $writerClass = $this->namespace . '\\' . $elementClass;

            // Check it's a page break. No need to write it, instead, flag containers' pageBreakBefore
            // to be assigned to the next element
            if ($elementClass == 'PageBreak') {
                $this->setPageBreakBefore(true);
                continue;
            }
            if (class_exists($writerClass)) {
                // Get container's page break before and reset it
                $pageBreakBefore = $this->hasPageBreakBefore();
                $this->setPageBreakBefore(false);

                /** @var \PhpOffice\PhpWord\Writer\Word2007\Element\AbstractElement $writer Type hint */
                $writer = new $writerClass($xmlWriter, $element, $withoutP);
                $writer->setPageBreakBefore($pageBreakBefore);
                $writer->write();
            }
        }

        // Special case for Cell: They have to contain a w:p element at the end. The $elementClass contains
        // the last element name. If it's empty string or Table, the last element is not w:p
        if ($containerClass == 'Cell') {
            if ($elementClass == '' || $elementClass == 'Table') {
                $writerClass = $this->namespace . '\\TextBreak';
                /** @var \PhpOffice\PhpWord\Writer\Word2007\Element\AbstractElement $writer Type hint */
                $writer = new $writerClass($xmlWriter, new TextBreakElement(), $withoutP);
                $writer->write();
            }
        }
    }
}