<?php
namespace Livewire\HydrationMiddleware;
use Livewire\Exceptions\RootTagMissingFromViewException;
class AddAttributesToRootTagOfHtml
{
public function __invoke($dom, $data)
{
$attributesFormattedForHtmlElement = collect($data)
->mapWithKeys(function ($value, $key) {
return ["wire:{$key}" => $this->escapeStringForHtml($value)];
})->map(function ($value, $key) {
return sprintf('%s="%s"', $key, $value);
})->implode(' ');
preg_match('/(?:\n\s*|^\s*)<([a-zA-Z0-9\-]+)/', $dom, $matches, PREG_OFFSET_CAPTURE);
throw_unless(
count($matches),
new RootTagMissingFromViewException
);
$tagName = $matches[1][0];
$lengthOfTagName = strlen($tagName);
$positionOfFirstCharacterInTagName = $matches[1][1];
return substr_replace(
$dom,
' '.$attributesFormattedForHtmlElement,
$positionOfFirstCharacterInTagName + $lengthOfTagName,
0
);
}
protected function escapeStringForHtml($subject)
{
if (is_string($subject) || is_numeric($subject)) {
return htmlspecialchars($subject, ENT_QUOTES|ENT_SUBSTITUTE);
}
return htmlspecialchars(json_encode($subject), ENT_QUOTES|ENT_SUBSTITUTE);
}
}