function s3fs_cors_upload_process in S3 File System CORS Upload 7

Element process function for s3fs_cors_upload element.

Expands the element to include Upload and Remove buttons, as well as support for a default value.

In order to take advantage of the work that file.module is already doing for elements of type #managed_file, we stick to the same naming convention here.

1 string reference to 's3fs_cors_upload_process'

s3fs_cors_element_info in ./s3fs_cors.module

Implements hook_element_info().

File

./s3fs_cors.module, line 214

Allow uploading of files directly to AmazonS3 via the browser using CORS.

Code

function s3fs_cors_upload_process($element, &$form_state, &$form) {
  $fid = isset($element['#value']['fid']) ? $element['#value']['fid'] : 0;
  $element['#file'] = $fid ? file_load($fid) : FALSE;
  $element['#tree'] = TRUE;
  $parents_id = implode('_', $element['#parents']);

  // AJAX settings used for upload and remove buttons.
  $ajax_settings = array(
    'callback' => 's3fs_cors_upload_js',
    'wrapper' => "{$element['#id']}-ajax-wrapper",
    'method' => 'replace',
    'effect' => 'fade',
  );

  // The "Upload" button.
  $element['upload_button'] = array(
    '#name' => "{$parents_id}_upload_button",
    '#type' => 'submit',
    '#value' => t('Upload'),
    '#validate' => array(),
    '#limit_validation_errors' => array(
      $element['#parents'],
    ),
    '#attributes' => array(
      'class' => array(
        'cors-form-submit',
      ),
    ),
    '#weight' => -5,
    '#submit' => array(
      's3fs_cors_upload_submit',
    ),
    '#ajax' => $ajax_settings,
  );

  // The "Remove" button.
  $element['remove_button'] = array(
    '#name' => "{$parents_id}_remove_button",
    '#type' => 'submit',
    '#value' => t('Remove'),
    '#validate' => array(),
    '#limit_validation_errors' => array(
      $element['#parents'],
    ),
    '#attributes' => array(
      'class' => array(
        'cors-form-remove',
      ),
    ),
    '#weight' => -5,
    '#submit' => array(
      's3fs_cors_remove_submit',
    ),
    '#ajax' => $ajax_settings,
  );

  // The file upload field itself.
  $element['upload'] = array(
    '#name' => "files[{$parents_id}]",
    '#type' => 'file',
    '#title' => t('Choose a file.'),
    '#title_display' => 'invisible',
    '#size' => $element['#size'],
    '#theme_wrappers' => array(),
    '#weight' => -10,
    '#attributes' => array(
      'class' => array(
        's3fs-cors-upload-file',
      ),
      'multiple' => 'multiple',
    ),
  );
  if ($fid && $element['#file']) {
    $element['filelink'] = array(
      '#type' => 'markup',
      '#markup' => theme('file_link', array(
        'file' => $element['#file'],
      )) . ' ',
      '#weight' => -10,
    );
  }

  // Add the extension list to the page as JavaScript settings.
  if (isset($element['#upload_validators']['file_validate_extensions'][0])) {
    $extension_list = implode(',', array_filter(explode(' ', $element['#upload_validators']['file_validate_extensions'][0])));
    $element['upload']['#attached']['js'] = array(
      array(
        'type' => 'setting',
        'data' => array(
          'file' => array(
            'elements' => array(
              "#{$element['#id']}-upload" => $extension_list,
            ),
            'max_upload_size' => array(
              $element['upload']['#name'] => $element['#upload_validators']['file_validate_size'][0],
            ),
          ),
        ),
      ),
    );
  }

  // These hidden elements get populated by javascript after uploading the file
  // to S3. They are then used by the value callback to save the new file record
  // to the DB.
  $element['fid'] = array(
    '#type' => 'hidden',
    '#value' => $fid,
    '#attributes' => array(
      'class' => array(
        'fid',
      ),
    ),
  );
  $element['filename'] = array(
    '#type' => 'hidden',
    '#default_value' => isset($element['#file']->filename) ? $element['#file']->filename : '',
    '#attributes' => array(
      'class' => array(
        'filename',
      ),
    ),
    // This keeps theme_file_widget() happy.
    '#markup' => '',
  );
  $element['filemime'] = array(
    '#type' => 'hidden',
    '#attributes' => array(
      'class' => array(
        'filemime',
      ),
    ),
    '#default_value' => isset($element['#file']->filemime) ? $element['#file']->filemime : '',
  );
  $element['filesize'] = array(
    '#type' => 'hidden',
    '#attributes' => array(
      'class' => array(
        'filesize',
      ),
    ),
    '#default_value' => isset($element['#file']->filesize) ? $element['#file']->filesize : '',
  );

  // Add a class to the <form> element so we can find it with JS later.
  $form['#attributes']['class'][] = 's3fs-cors-upload-form';
  $element['#prefix'] = "<div id=\"{$element['#id']}-ajax-wrapper\">";
  $element['#suffix'] = '</div>';
  return $element;
}