function file_add_form_submit

Submit handler for the add file form.

File

core/modules/file/file.pages.inc, line 231

Supports file operations including Manage and Delete.

Code

function file_add_form_submit($form, &$form_state) {
  $config = config('file.settings');
  $form_state['storage'] = isset($form_state['storage']) ? $form_state['storage'] : array();
  $form_state['storage'] = array_merge($form_state['storage'], $form_state['values']);

  // Field selected allowed types.
  $selected_files = $form['#options']['types'];

  // This var is set to TRUE when we are ready to save the file.
  $save = FALSE;
  $trigger = $form_state['triggering_element']['#id'];
  $triggered_next = $trigger == 'edit-next' || (strpos($trigger, 'edit-next--') === 0);
  $triggered_previous = $trigger == 'edit-previous' || (strpos($trigger, 'edit-previous--') === 0);
  $step_delta = ($triggered_previous) ? -1 : 1;

  $steps_to_check = array(2, 3);
  if ($triggered_previous) {
    // If the previous button was hit,
    // the step checking order should be reversed 3, 2.
    $steps_to_check = array_reverse($steps_to_check);
  }

  foreach ($steps_to_check as $step) {
    // Check if we can skip step 2 and 3.
    if (($form['#step'] == $step - 1 && $triggered_next) || ($form['#step'] == $step + 1 && $triggered_previous)) {
      $file = file_load($form_state['storage']['upload']);
      if ($step == 2) {
        // Check if we can skip step 2.
        $candidates = file_get_filetype_candidates($file, $selected_files);
        if (count($candidates) == 1) {
          $candidates_keys = array_keys($candidates);
          // There is only one possible filetype for this file.
          // Skip the second page.
          $form['#step'] += $step_delta;
          $form_state['storage']['type'] = reset($candidates_keys);
        }
        elseif (!$candidates || $config->get('upload_wizard_skip_file_type')) {
          // Do not assign the file a file type.
          $form['#step'] += $step_delta;
          $form_state['storage']['type'] = FILE_TYPE_NONE;
        }
      }
      else {
        // Check if we can skip step 3.
        $options = $form['#options'];
        $schemes = file_get_stream_wrappers(STREAM_WRAPPERS_WRITE_VISIBLE);

        // Remove any schemes not found in the instance settings.
        if (!empty($options['schemes'])) {
          $schemes = array_intersect_key($schemes, $options['schemes']);
        }

        if (!file_is_writeable($file)) {
          // The file is read-only (remote) and must use its provided scheme.
          $form['#step'] += $step_delta;
          $form_state['storage']['scheme'] = file_uri_scheme($file->uri);
        }
        elseif (count($schemes) == 1) {
          // There is only one possible stream wrapper for this file.
          // Skip the third page.
          $form['#step'] += $step_delta;
          $form_state['storage']['scheme'] = key($schemes);
        }
        elseif ($config->get('upload_wizard_skip_scheme')) {
          $form['#step'] += $step_delta;

          // Fallback to the URI scheme specified in the field settings
          // otherwise use the default file scheme.
          if (!empty($options['uri_scheme'])) {
            $form_state['storage']['scheme'] = $options['uri_scheme'];
          }
          else {
            $form_state['storage']['scheme'] = file_default_scheme();
          }
        }
      }
    }
  }

  // We have the filetype, check if we can skip step 4.
  if ($form['#step'] == 3 && $triggered_next) {
    $file = file_load($form_state['storage']['upload']);
    $form_state['file'] = $file;
    if (!field_info_instances('file', $form_state['storage']['type'])) {
      // This filetype doesn't have fields, save the file.
      $save = TRUE;
    }
    elseif ($config->get('upload_wizard_skip_fields')) {
      // Save the file with blanks fields.
      $save = TRUE;
    }
  }

  // Form id's can vary depending on how many other forms are displayed, so we
  // need to do string comparisons. e.g edit-submit--2.
  if ($triggered_next) {
    $form_state['step'] = $form['#step'] + 1;
  }
  elseif ($triggered_previous) {
    $form_state['step'] = $form['#step'] - 1;
  }
  elseif (strpos($trigger, 'edit-submit') !== FALSE) {
    $save = TRUE;
  }

  if ($save) {
    $file = file_load($form_state['storage']['upload']);
    if ($file) {
      $file->type = $form_state['storage']['type'];
      $file->display = TRUE;

      // Save the form fields.
      // Keep in mind that the values for the Field API fields must be in
      // $form_state['values'] and not in ['storage']. This is true as long as
      // the fields are on the last page of the multi step form.
      entity_form_submit_build_entity('file', $file, $form, $form_state);

      if (file_uri_scheme($file->uri) != $form_state['storage']['scheme']) {
        $file_destination = $form_state['storage']['scheme'] . '://' . file_uri_target($file->uri);
        $file_destination = file_stream_wrapper_uri_normalize($file_destination);
        $file_destination_dirname = backdrop_dirname($file_destination);
        // Create the directory in case it doesn't exist.
        file_prepare_directory($file_destination_dirname, FILE_CREATE_DIRECTORY);
        if ($moved_file = file_move($file, $file_destination, FILE_EXISTS_RENAME)) {
          // Only re-assign the file object if file_move() did not fail.
          $file = $moved_file;
          $file_in_final_location = TRUE;
        }
        else {
          $file_in_final_location = FALSE;
        }
      }
      else {
        $file_in_final_location = TRUE;
      }

      $substitutions = array(
        '@type' => file_type_get_name($file),
        '%name' => $file->filename,
      );

      // Only save the file if any necessary move was successful.
      if ($file_in_final_location) {
        // Change the file from temporary to permanent.
        $file->status = FILE_STATUS_PERMANENT;

        file_save($file);
        // Record that the module (in this case, the File module) is using the
        // file. Without the call to file_usage_add, file_managed_file_validate()
        // produces an error upon saving the form, saying that the uploaded file
        // may not be referenced.
        file_usage_add($file, 'file', 'file', $file->fid);
        $form_state['file'] = $file;

        backdrop_set_message(t('@type %name was uploaded.', $substitutions));
      }
      else {
        $file->delete();
        backdrop_set_message(t('@type %name was not saved.', $substitutions), 'error');
      }
    }
    else {
      backdrop_set_message(t('An error occurred and no file was uploaded.'), 'error');
      return;
    }

    // Figure out destination.
    if (user_access('administer files')) {
      $path = 'admin/content/files';
    }
    else {
      $path = 'file/' . $file->fid;
    }
    $form_state['redirect'] = $path;
  }
  else {
    $form_state['rebuild'] = TRUE;
  }

  // Clear the page and block caches.
  cache_clear_all();
}