xref: /webtrees/app/CommonMark/XrefParser.php (revision 51f02acd5c7cb6a496edf42f9d187a2a7835bb82) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2021 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees\CommonMark;
21
22use Fisharebest\Webtrees\Gedcom;
23use Fisharebest\Webtrees\GedcomRecord;
24use Fisharebest\Webtrees\Registry;
25use Fisharebest\Webtrees\Tree;
26use League\CommonMark\Parser\Inline\InlineParserInterface;
27use League\CommonMark\Parser\Inline\InlineParserMatch;
28use League\CommonMark\Parser\InlineParserContext;
29
30/**
31 * Convert XREFs within markdown text to links
32 */
33class XrefParser implements InlineParserInterface
34{
35    private Tree $tree;
36
37    /**
38     * MarkdownXrefParser constructor.
39     *
40     * @param Tree $tree Match XREFs in this tree
41     */
42    public function __construct(Tree $tree)
43    {
44        $this->tree = $tree;
45    }
46
47    /**
48     * We are only interested in text that begins with '@'.
49     *
50     * @return InlineParserMatch
51     */
52    public function getMatchDefinition(): InlineParserMatch
53    {
54        return InlineParserMatch::regex('@(' . Gedcom::REGEX_XREF . ')@');
55    }
56
57    /**
58     * @param InlineParserContext $inlineContext
59     *
60     * @return bool
61     */
62    public function parse(InlineParserContext $inlineContext): bool
63    {
64        $cursor = $inlineContext->getCursor();
65        [$xref] = $inlineContext->getSubMatches();
66        $record = Registry::gedcomRecordFactory()->make($xref, $this->tree);
67
68        if ($record instanceof GedcomRecord) {
69            $cursor->advanceBy($inlineContext->getFullMatchLength());
70
71            $inlineContext->getContainer()->appendChild(new XrefNode($record));
72
73            return true;
74        }
75
76        return false;
77    }
78}
79