<?php 
function xlsx_to_html($xlsx, $html_dir) {
    // Ensure the LANG environment variable is set
    putenv('LANG=ru_RU.UTF-8');
    
    // Ensure the output directory exists
    if (!is_dir($html_dir)) {
        mkdir($html_dir, 0777, true);
    }
    
    // Construct the command
    $command = "sudo -u root libreoffice --headless --convert-to html --outdir " . escapeshellarg($html_dir) . " " . escapeshellarg($xlsx);
    // Execute the command
    $output = shell_exec($command);
    $output = extract_between_markers($output);

    update_src_paths($output, $html_dir);
    
    return $output;
}

function extract_between_markers($input_str) {
    // Define the regular expression pattern to match the content between the markers
    $pattern = '/->\s*(.*?)\s*using filter : HTML \(StarCalc\)/';

    // Perform the regex match
    if (preg_match($pattern, $input_str, $matches)) {
        // Return the matched content
        return $matches[1];
    }

    // Return null if no match is found
    return null;
}

function update_src_paths($htmlPath, $newBasePath) {
    // Load HTML content from the file
    if(is_null($htmlPath)) 
    {
        dd("htmlPath null dönüyor");
    }
    $htmlContent = file_get_contents($htmlPath);

    // Create a new DOMDocument instance
    $dom = new DOMDocument();
    
    // Suppress warnings due to malformed HTML
    libxml_use_internal_errors(true);
    
    // Load HTML into the DOMDocument
    $dom->loadHTML($htmlContent, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
    
    // Restore error handling
    libxml_clear_errors();
    
    // Get all 'src' attributes
    $xpath = new DOMXPath($dom);
    $srcAttributes = $xpath->query('//img/@src | //script/@src | //link/@href');
    
    foreach ($srcAttributes as $attribute) {
        $currentValue = $attribute->value;
        // Extract the current path and replace it with the new base path
        $updatedValue = url($newBasePath) . "/" . $currentValue;
        $attribute->value = $updatedValue;
    }
    
    // Save the updated HTML back to the file
    $updatedHtmlContent = $dom->saveHTML();

  chmod("storage/documents/", 0777);
  unlink($htmlPath);

  if (!file_exists(dirname($htmlPath))) {
        mkdir(dirname($htmlPath), 0777, true);
    }

    file_put_contents($htmlPath, $updatedHtmlContent);
}
?>