<?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\AbstractElement as Element;
use PhpOffice\PhpWord\Exception\Exception;
use PhpOffice\PhpWord\Shared\XMLWriter;

/**
 * Abstract element writer
 *
 * @since 0.10.0
 */
abstract class AbstractElement
{
    /**
     * XML writer
     *
     * @var \PhpOffice\PhpWord\Shared\XMLWriter
     */
    private $xmlWriter;

    /**
     * Element
     *
     * @var \PhpOffice\PhpWord\Element\AbstractElement
     */
    private $element;

    /**
     * Without paragraph
     *
     * @var bool
     */
    protected $withoutP = false;

    /**
     * Write element
     */
    abstract public function write();

    /**
     * Create new instance
     *
     * @param bool $withoutP
     */
    public function __construct(XMLWriter $xmlWriter, Element $element, $withoutP = false)
    {
        $this->xmlWriter = $xmlWriter;
        $this->element = $element;
        $this->withoutP = $withoutP;
    }

    /**
     * Get XML Writer
     *
     * @return \PhpOffice\PhpWord\Shared\XMLWriter
     */
    protected function getXmlWriter()
    {
        return $this->xmlWriter;
    }

    /**
     * Get Element
     *
     * @return \PhpOffice\PhpWord\Element\AbstractElement
     */
    protected function getElement()
    {
        if (!is_null($this->element)) {
            $elementClass = 'PhpOffice\\PhpWord\\Element\\' . basename(get_class($this->element));
            if ($this->element instanceof $elementClass) {
                return $this->element;
            } else {
                throw new Exception('No valid element assigned.');
            }
        } else {
            throw new Exception('No element assigned.');
        }
    }
}