ji_batch_delete.module

<?php
/**
 * $file
 * Provide batch delete repository objects functionality.
 */

/**
 * Implements hook_form_alter().
 */
function ji_batch_delete_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == ('islandora_basic_collection_delete_children_form')) {
    $form['submit'] = array(
      array(
        '#type' => 'submit',
        '#value' => t('Delete selected objects'),
      ),
      array(
        '#type' => 'submit',
        '#value' => t('Delete All objects in this collection'),
      ),
    );
    $form['#submit'] = array('ji_batch_delete_islandora_basic_collection_delete_children_form_submit');
  }
}

/**
 * Submit handler for object deletion form in the collection manager.
 *
 * @param array $form
 *   The Drupal form definition.
 * @param array $form_state
 *   The Drupal form state.
 */
function ji_batch_delete_islandora_basic_collection_delete_children_form_submit(array $form, array &$form_state) {
  $collection = $form_state['collection'];
  if ($form_state['input']['op'] === t('Delete All objects in this collection')) {
    $children = null;
  } else {
    $children = array_keys(array_filter($form_state['values']['children']));
  }
  $batch = islandora_basic_collection_delete_children_batch($collection, $children);
  batch_set($batch);
}