/**
* @inheritdoc
*/
public function parse(FillPdfFormInterface $fillpdf_form) {
/** @var FileInterface $file */
$file = File::load($fillpdf_form->file->target_id);
$filename = $file->getFileUri();
$path_to_pdftk = $this->getPdftkPath();
$status = FillPdf::checkPdftkPath($path_to_pdftk);
if ($status === FALSE) {
drupal_set_message($this->t('pdftk not properly installed.'), 'error');
return [];
}
// Use exec() to call pdftk (because it will be easier to go line-by-line parsing the output) and pass $content via stdin. Retrieve the fields with dump_data_fields.
$output = [];
exec($path_to_pdftk . ' ' . escapeshellarg($this->fileSystem->realpath($filename)) . ' dump_data_fields', $output, $status);
if (count($output) === 0) {
drupal_set_message($this->t('PDF does not contain fillable fields.'), 'warning');
return [];
}
// Build a simple map of dump_data_fields keys to our own array keys
$data_fields_map = [
'FieldType' => 'type',
'FieldName' => 'name',
'FieldFlags' => 'flags',
'FieldJustification' => 'justification',
];
// Build the fields array
$fields = [];
$fieldindex = -1;
foreach ($output as $lineitem) {
if ($lineitem == '---') {
$fieldindex++;
continue;
}
// Separate the data key from the data value
$linedata = explode(':', $lineitem);
if (in_array($linedata[0], array_keys($data_fields_map), NULL)) {
$fields[$fieldindex][$data_fields_map[$linedata[0]]] = trim($linedata[1]);
}
}
return $fields;
}
/**
* {@inheritdoc}
*/
public function validateForm(array &$form, FormStateInterface $form_state) {
if ($form_state->getValue('pdftk_path')) {
$status = FillPdf::checkPdftkPath($form_state->getValue('pdftk_path'));
if ($status === FALSE) {
$form_state->setErrorByName('pdftk_path', $this->t('The path you have entered for
<em>pdftk</em> is invalid. Please enter a valid path.'));
}
}
}
