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<?php
declare(strict_types=1);
namespace League\HTMLToMarkdown\Converter;
use League\HTMLToMarkdown\ElementInterface;
class TextConverter implements ConverterInterface
{
public function convert(ElementInterface $element): string
{
$markdown = $element->getValue();
// Remove leftover \n at the beginning of the line
$markdown = \ltrim($markdown, "\n");
// Replace sequences of invisible characters with spaces
$markdown = \preg_replace('~\s+~u', ' ', $markdown);
\assert(\is_string($markdown));
// Escape the following characters: '*', '_', '[', ']' and '\'
if (($parent = $element->getParent()) && $parent->getTagName() !== 'div') {
$markdown = \preg_replace('~([*_\\[\\]\\\\])~u', '\\\\$1', $markdown);
\assert(\is_string($markdown));
}
$markdown = \preg_replace('~^#~u', '\\\\#', $markdown);
\assert(\is_string($markdown));
if ($markdown === ' ') {
$next = $element->getNext();
if (! $next || $next->isBlock()) {
$markdown = '';
}
}
return \htmlspecialchars($markdown, ENT_NOQUOTES, 'UTF-8');
}
/**
* @return string[]
*/
public function getSupportedTags(): array
{
return ['#text'];
}
}
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