Parser::getBlockFromNode

static function getBlockFromNode(BitrixMainWebDOMNode $node, array $params = []): ?array
{
	$type = 'text';
	$content = $node->getOuterHTML();
	$attrs = $node->getAttributes();

	// quote / code
	if (isset($attrs['class']) && in_array($attrs['class']->getValue(), ['quote', 'code']))
	{
		$type = $attrs['class']->getValue();
		$regExp = '#^
s*
' .
		          '(.*?)
$#is';
		if (preg_match($regExp, $content, $matches))
		{
			$content = $matches[1];
		}
		if ($type == 'code' && preg_match('#^
(.*?)
$#is', $content, $matches))
		{
			$content = $matches[1];
		}
	}
	// table
	else if (isset($attrs['class']) && $attrs['class']->getValue() == 'data-table')
	{
		$type = 'table';
	}
	// video
	else if (($node->getNodeName() == 'IFRAME') && isset($attrs['src']))
	{
		$type = 'video';
		$content = self::getVideoContent(
			$attrs['src']->getValue()
		);
	}
	// picture / file on a single line
	else if (preg_match('/^[DISK FILE ID=([^]]+)]/is', trim($content), $matches))
	{
		$type = 'img';
		$content = self::getImgContent($matches[1], $params['files']);;
	}

	// replace files in content
	if (
		$type == 'text' &&
		isset($params['files']) &&
		is_array($params['files'])
	)
	{
		$content = self::replaceFilesInContent($content, $params['files']);
	}

	if ($content)
	{
		return [
			'type' => $type,
			'content' => $content
		];
	}

	return null;
}