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<?php
/**
* @package Convert Forms
* @version 3.2.11 Pro
*
* @author Tassos Marinos <info@tassos.gr>
* @link http://www.tassos.gr
* @copyright Copyright © 2022 Tassos Marinos All Rights Reserved
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
*/
defined('_JEXEC') or die('Restricted access');
use NRFramework\URLHelper;
class PDFHelper
{
/**
* PDF HTML Template
*
* @var String
*/
public static $html = '<!DOCTYPE HTML><html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"><style type="text/css">* { font-family: arial !important; }</style></head><body>[TEMPLATE]</body>';
/**
* Validates and creates the PDF
*
* @param object $submission
*
* @return void
*/
public static function createSubmissionPDF($submission, $overwrite = false)
{
// pdf enabled check
if (!self::isPDFEnabled($submission))
{
return;
}
$save_data_to_db = !isset($submission->form->save_data_to_db) || (isset($submission->form->save_data_to_db) && $submission->form->save_data_to_db === '1');
$pdf = $submission->form->pdf;
// Prepare the PDF's template with content plugins.
// This enables us to create a shared template with the Custom Module and
// load it across different forms using the {loadmoduleid ID} syntax.
$pdf['pdf_template'] = \JHtml::_('content.prepare', $pdf['pdf_template']);
// set filename prefix
$prefix = (isset($pdf['pdf_filename_prefix']) && !empty($pdf['pdf_filename_prefix'])) ? $pdf['pdf_filename_prefix'] . '_' : '';
// append the _{submission.id] suffix to each file name
$pdf['pdf_filename'] = $prefix . '{submission.id}';
// replace Smart Tags
$pdf = \ConvertForms\SmartTags::replace($pdf, $submission);
/**
* Try transiterating the file name using the native php function
*
* This is used in Joomla 4.0 version of makeSafe but not in 3.X.
*
* If the given filename is non-latin, then all characters will be removed from the filename via makeSafe and thus
* we wont be able to upload the file.
*
* @see https://github.com/joomla/joomla-cms/pull/27974
*/
if (!defined('nrJ4') && function_exists('transliterator_transliterate') && function_exists('iconv'))
{
// Using iconv to ignore characters that can't be transliterated
$pdf['pdf_filename'] = iconv("UTF-8", "ASCII//TRANSLIT//IGNORE", transliterator_transliterate('Any-Latin; Latin-ASCII; Lower()', $pdf['pdf_filename']));
}
// Make safe after the Smart Tags replacement
$pdf['pdf_filename'] = self::makeSafe($pdf['pdf_filename']);
// upload folder check
if (!$upload_folder = $pdf['pdf_upload_folder'])
{
return;
}
$upload_folder = rtrim($upload_folder, '/');
// make sure upload folder exists and is writable
if (!\NRFramework\File::createDirs(JPATH_ROOT . '/' . $upload_folder))
{
return;
}
$file_path = $pdf['pdf_upload_folder'] . '/' . $pdf['pdf_filename'] . '.pdf';
// make sure the file exists
// Do we really need to check if the file exists?
if (!\JFile::exists(JPATH_ROOT . '/' . $file_path) || $overwrite)
{
// Convert all relative paths found in <a> and <img> elements to absolute URLs
$pdf_template = URLHelper::relativePathsToAbsoluteURLs($pdf['pdf_template']);
self::create($upload_folder, $pdf_template, $pdf['pdf_filename']);
// Create Submission Meta record only if we are saving data to the database
if ($save_data_to_db)
{
\ConvertForms\SubmissionMeta::save($submission->id, 'pdf', '', $file_path);
}
return JURI::root() . $file_path;
}
return self::getSubmissionPDF($submission);
}
/**
* Creates a PDF given the upload folder and filename
*
* @param string $upload_folder The upload folder
* @param string $content The content of the PDF
* @param string $filename The filename
*
* @return void
*/
public static function create($upload_folder, $content, $filename)
{
// include domPDF library
require JPATH_SITE . '/plugins/convertformstools/pdf/dompdf/autoload.inc.php';
// replace [TEMPLATE] with given pdf contents
$pdf_html = str_replace('[TEMPLATE]', $content, self::$html);
// reference the Dompdf namespace
$options = new \Dompdf\Options();
$options->setIsRemoteEnabled(true);
// instantiate and use the dompdf class
$dompdf = new \Dompdf\Dompdf($options);
$dompdf->loadHtml($pdf_html);
// Render the HTML as PDF
$dompdf->render();
$output = $dompdf->output();
$destination_filename = \JPath::clean(JPATH_ROOT . '/' . $upload_folder . '/' . self::makeSafe($filename) . '.pdf');
file_put_contents($destination_filename, $output);
}
/**
* Retrieves the submission PDF
*
* @param object $submission
*
* @return string
*/
public static function getSubmissionPDF($submission)
{
if (!isset($submission->form->pdf))
{
return;
}
if (!$file_path = \ConvertForms\SubmissionMeta::getValue($submission->id, 'pdf'))
{
return;
}
// make sure the file exists
if (!\JFile::exists(JPATH_ROOT . '/' . $file_path))
{
return;
}
return JURI::root() . $file_path;
}
/**
* Sanitizes the file name
*
* @param string $filename
*
* @return string
*/
public static function makeSafe($filename)
{
// Sanitize filename
$filename = \JFile::makeSafe($filename);
// Replace spaces with underscore
$filename = str_replace(' ', '_', $filename);
return $filename;
}
/**
* Checks whether we have PDF enabled
*
* @param object $submission
*
* @return boolean
*/
public static function isPDFEnabled($submission)
{
return isset($submission->form->pdf['pdf_enabled']) && $submission->form->pdf['pdf_enabled'] == '1';
}
}