replace summernote image contents with storage path

process_summernote.php

function processSummerNote($content)
{
    if (empty($content)) {
        return $content;
    }

    $content = mb_convert_encoding($content, 'HTML-ENTITIES', 'UTF-8');
    $dom = new \DOMDocument('1.0', 'utf-8');

    libxml_use_internal_errors(true);
    $dom->loadHTML($content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
    $images = $dom->getElementsByTagName('img');

    foreach ($images as $count => $image) 
    {
        $src = $image->getAttribute('src');
        if (preg_match('/data:image/', $src)) {
            preg_match('/data:image\/(?<mime>.*?)\;/', $src, $groups);
            $mimeType = $groups['mime'];
            $uniqueId = str_random();
            $path = "images/$uniqueId.$mimeType";
            $fileContents = file_get_contents($src);

            Storage::disk('s3')->put($path, $fileContents, 'public');

            $image->removeAttribute('src');
            $image->setAttribute('src', makeS3Url($path));
        }
    }

    return $dom->saveHTML();
}