function upload_qc_file_validate in Upload QC 7

Implements hook_file_validate(). This implementation includes two test: filesize and existance of db entry with the same URI. If it returns errors, the upload process is blocked and the errors are displayed.

File

./upload_qc.module, line 90

Code

function upload_qc_file_validate($file) {

  // array to return
  $errors = array();

  // check if there is an object on the input
  if (!is_object($file)) {
    return $errors;
  }

  // get setting variables from db and check them
  $error_check = variable_get('upload_qc_error', '');
  $length_check = variable_get('upload_qc_length', '');
  $inlcude_check = variable_get('upload_qc_include', '');
  $exclude_check = variable_get('upload_qc_exclude', '');
  $size_check = variable_get('upload_qc_size', '');

  // check if file URI already exists in db.
  // That prevents the AJAX error with duplicate entries for 'uri' in file_managed
  if (!empty($error_check)) {
    $query_result = db_query('SELECT n.fid
    FROM {file_managed} n WHERE n.uri = :uri', array(
      ':uri' => $file->destination,
    ));
    $record = $query_result
      ->fetchObject();
    if (is_object($record)) {
      $errors[] = t("The file's name currently in use. Please wait a few seconds and try again.");
    }
  }

  // check the length of the filename
  if (!empty($length_check)) {
    if (empty($file->filename)) {
      $errors[] = t("The file's name is empty. Please give the file a name.");
    }
    if (strlen($file->filename) > $length_check) {
      $errors[] = t("The file's name exceeds the " . $length_check . " characters limit. Please give the file a shorter name and try again.");
    }
  }

  // check for required words/characters
  // check the length of the filename
  if (!empty($inlcude_check)) {
    $pattern_in = '/' . $inlcude_check . '/';
    if (!preg_match($pattern_in, $file->filename)) {
      $errors[] = t("The file's name does not include the required " . $inlcude_check);
    }
  }

  // check for required words/characters
  // check the length of the filename
  if (!empty($exclude_check)) {
    $pattern_ex = '/' . $exclude_check . '/';
    if (preg_match($pattern_ex, $file->filename)) {
      $errors[] = t("The file's name includes the banned expression " . $exclude_check);
    }
  }

  // check for required words/characters
  // check the length of the filename
  if (!empty($size_check)) {
    if ($file->filesize > $size_check * 1024) {
      $errors[] = t("Please select a smaller file. The file size limit is currently " . $size_check . " KB");
    }
  }
  return $errors;
}