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File: PicasaImportHelper.class
<?php
/*
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2007 Bharat Mediratta
 *
 * 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; either version 2 of the License, or (at
 * your option) any later version.
 *
 * 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.
 */

/**
 * This class provides some functions used by the Picasa module
 * @package Picasa
 * @subpackage PicasaImportHelper
 * @author Waldemar Schlackow <gallery@schlackow.de>
 * @version $Revision: 15513 $
 * @static
 */
class PicasaImportHelper {
    /**
     * Convert html according to given markup type
     * @param string $markupType markup type (none, bbcode, html)
     * @param string $item input string
     * @param string $sourceEncoding (optional; default='UTF-8')
     * @return string
     */
    function convertHtml($markupType, $item, $sourceEncoding='UTF-8') {
	$item = GalleryCoreApi::convertToUtf8($item, $sourceEncoding);
	switch ($markupType) {
	    case 'bbcode':
		$item = PicasaImportHelper::convertHtmlToBbcode($item);
		break;

	    case 'html':
		break;

	    case 'none':
	    default:
		$item = strip_tags($item);
	}
	GalleryUtilities::sanitizeInputValues($item, false);
	return $item;
    }

    /**
     * Converts HTML to BBCode
     *
     * @param string $item item to convert
     * @return string
     */
    function convertHtmlToBbcode($item) {
	static $patterns, $match, $replace;
	if (!isset($patterns)) {
	    $patterns = array(
		'#<br\s*(/?)>#i' => '\n',
		'#<(/?)(b|strong)>#i' => '[$1b]',
		'#<(/?)(i|em)>#i' => '[$1i]',
		'#<(/?)ul>#i' => '[$1list]',
		'#<li>#i' => '[*]',
		'#</li>#i' => '',
		'#<img[^>]*\s+src\s*=\s*["\']{0,1}([^\s"\'>]+)["\']{0,1}[^>]*>#is' =>
		    '[img]$1[/img]',
		'#<a[^>]*\s+href\s*=\s*["\']{0,1}([^\s"\'>]+)["\']{0,1}[^>]*>\s*(.*?)\s*</a>#is' =>
		    '[url=$1]$2[/url]',
	    );
	    $match = array_keys($patterns);
	    $replace = array_values($patterns);
	}
	$item = preg_replace($match, $replace, $item);
	return strip_tags($item);
    }
}
?>