BoldBlockParser.php

<?php

declare(strict_types=1);

/*
 * A BBCode-to-HTML parser for youthweb.net
 * Copyright (C) 2016-2021  Youthweb e.V. <info@youthweb.net>

 * 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 Youthweb\BBCodeParser\Extension\BBCode\Parser\Block;

use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
use League\CommonMark\Parser\Block\BlockContinue;
use League\CommonMark\Parser\Block\BlockContinueParserInterface;
use League\CommonMark\Parser\Block\BlockContinueParserWithInlinesInterface;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\InlineParserEngineInterface;
use League\CommonMark\Util\RegexHelper;
use Youthweb\BBCodeParser\Extension\BBCode\Node\Block\BoldBlock;

final class BoldBlockParser extends AbstractBlockContinueParser implements BlockContinueParserWithInlinesInterface
{
    private BoldBlock $block;

    private string $content = '';

    private bool $finished = false;

    public function __construct()
    {
        $this->block = new BoldBlock();
    }

    public function getBlock(): BoldBlock
    {
        return $this->block;
    }

    public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
    {
        if ($cursor->getNextNonSpaceCharacter() !== '[') {
            return BlockContinue::at($cursor);
        }

        $tmpCursor = clone $cursor;
        $tmpCursor->advanceToNextNonSpaceOrTab();
        $line = $tmpCursor->getSubstring(0, 4);

        if ($line === '[/b]') {
            return BlockStart::none();
        }

        return BlockContinue::at($cursor);
    }

    public function addLine(string $line): void
    {
        if ($this->content !== '') {
            $this->content .= "\n";
        }

        $line = substr($line, 0, -4);

        $this->content .= $line;
    }

    public function closeBlock(): void
    {
        $this->block->setLiteral($this->content);
        $this->content = '';
    }

    /**
     * Parse any inlines inside of the current block
     */
    public function parseInlines(InlineParserEngineInterface $inlineParser): void
    {
        // #TODO
    }
}