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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/>.
*/
namespace Fisharebest\Webtrees\CommonMark;
use League\CommonMark\Block\Element\Paragraph;
use League\CommonMark\Block\Parser\AbstractBlockParser;
use League\CommonMark\ContextInterface;
use League\CommonMark\Cursor;
use Webuni\CommonMark\TableExtension\Table;
use Webuni\CommonMark\TableExtension\TableCell;
use Webuni\CommonMark\TableExtension\TableRow;
/**
* Convert webtrees 1.x census-assistant markup into tables.
* Note that webtrees 2.0 generates markdown tables directly.
*
* Based on the table parser from webuni/commonmark-table-extension.
*/
class CensusTableParser extends AbstractBlockParser
{
const REGEX_CENSUS_TABLE_HEADER = '/^\.b\.[^.|]+(?:\|\.b\.[^.|]+)*$/';
/**
* Parse a paragraph of text with the following stucture:
*
* .b.HEADING1|.b.HEADING2|.b.HEADING3
* COL1|COL2|COL3
* COL1|COL2|COL3
*
* @param ContextInterface $context
* @param Cursor $cursor
*
* @return bool
*/
public function parse(ContextInterface $context, Cursor $cursor)
{
$container = $context->getContainer();
// Replace paragraphs with tables
if (!$container instanceof Paragraph) {
return false;
}
$lines = $container->getStrings();
$first_line = array_pop($lines);
if (!preg_match(self::REGEX_CENSUS_TABLE_HEADER, $first_line)) {
return false;
}
$head = $this->parseRow($first_line, TableCell::TYPE_HEAD);
$table = new Table(function (Cursor $cursor) use (&$table) {
$row = $this->parseRow($cursor->getLine(), TableCell::TYPE_BODY);
if ($row === null) {
return false;
}
$table->getBody()->appendChild($row);
return true;
});
$table->getHead()->appendChild($head);
$context->replaceContainerBlock($table);
return true;
}
/**
* @param string $line
* @param string $type
*
* @return TableRow|null
*/
private function parseRow($line, $type)
{
if (strpos($line, '|') === false) {
return null;
}
$row = new TableRow;
foreach (explode('|', $line) as $cell) {
// Strip leading ".b." from <th> cells
if ($type === TableCell::TYPE_HEAD && substr_compare($cell, '.b.', 0)) {
$cell = substr($cell, 3);
}
$row->appendChild(new TableCell($cell, $type, null));
}
return $row;
}
}
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