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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2018 webtrees development team
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\CommonMark;
use Fisharebest\Webtrees\Gedcom;
use Fisharebest\Webtrees\GedcomRecord;
use Fisharebest\Webtrees\Tree;
use League\CommonMark\Inline\Element\Link;
use League\CommonMark\Inline\Parser\AbstractInlineParser;
use League\CommonMark\InlineParserContext;
/**
* Convert XREFs within markdown text to links
*/
class XrefParser extends AbstractInlineParser
{
/** @var Tree - match XREFs in this tree */
private $tree;
/**
* MarkdownXrefParser constructor.
*
* @param Tree $tree
*/
public function __construct(Tree $tree)
{
$this->tree = $tree;
}
/**
* We are only interested in text that begins with '@'.
*
* @return string[]
*/
public function getCharacters(): array
{
return ['@'];
}
/**
* @param InlineParserContext $context
*
* @return bool
*/
public function parse(InlineParserContext $context): bool
{
// The cursor should be positioned on the opening '@'.
$cursor = $context->getCursor();
// If this isn't the start of an XREF, we'll need to rewind.
$previous_state = $cursor->saveState();
$handle = $cursor->match('/@' . Gedcom::REGEX_XREF . '@/');
if (empty($handle)) {
// Not an XREF?
$cursor->restoreState($previous_state);
return false;
}
$xref = trim($handle, '@');
$record = GedcomRecord::getInstance($xref, $this->tree);
if ($record === null) {
// Linked record does not exist?
$cursor->restoreState($previous_state);
return false;
}
$url = $record->url();
$label = $handle;
$title = strip_tags($record->getFullName());
$context->getContainer()->appendChild(new Link($url, $label, $title));
return true;
}
}
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