islandora_thumbnail_selector.module

<?php

/**
 * Implements islandora_basic_collection_build_manage_object().
 *
 * @param array $form_state
 *   The current Form State being processed.
 * @param AbstractObject $object
 *   The Islandora Object being processed.
 *
 * @return array
 *   The current Form State with a form element appended.
 */
function islandora_thumbnail_selector_islandora_basic_collection_build_manage_object(array $form_state, AbstractObject $object) {
  $form_state['manage_collection_object']['set-thumbnail'] = array(
    '#id' => 'select-thumbnail',
    '#group' => 'thumbnail',
    '#access' => true,
    '#type' => 'fieldset',
    '#title' => t('Select thumbnail'),
    'form' => drupal_get_form('islandora_thumbnail_selector_form', $object),
  );
  $form_state['manage_collection_object']['set-thumbnail']['form']['#submit'][] = 'islandora_thumbnail_selector_form_submit';
  return $form_state;
}

/**
 * Define the xacml management form.
 *
 * @param array $form
 *   The Drupal form definition.
 * @param array $form_state
 *   The Drupal form state.
 * @param AbstractObject $object
 *   The collection to move child objects from.
 *
 * @return array
 *   The Drupal form definition.
 */
function islandora_thumbnail_selector_form(array $form, array &$form_state, AbstractObject $object) {
  if (module_exists('islandora_basic_collection')) {
    module_load_include('inc', 'islandora', 'includes/utilities');
    module_load_include('inc', 'islandora_thumbnail_selector', 'includes/utilities');
    $form_state['collection'] = $object;
    return array(
    '#action' => request_uri() . '#select-thumbnail',
    'child' => islandora_thumbnail_selector_get_thumbnail_select_form_element($object, array(
      'element' => 4,
      'fragment' => '#select-thumbnail',
    )),
    'description' => array(
      '#type' => 'item',
      '#markup' => t('Choose a child object to use its thumbnail.'),
    ),
    'submit' => array(
      '#type' => 'submit',
      '#value' => t('Update Thumbnail'),
    ),
  );
  }
  else {
    return array();
  }
}

/**
 * Submit handler for the manage XACML form.
 *
 * @param array $form
 *   The Drupal form definition.
 * @param array $form_state
 *   The Drupal form state.
 */
function islandora_thumbnail_selector_form_submit(array $form, array &$form_state) {
  $collection = $form_state['collection'];
  
  $child = $form_state['values']['child'];
  
  if($child != null)
    islandora_thumbnail_selector_replace_thumbnail($collection, islandora_object_load($child));
  else
    drupal_set_message(t('Can not update thumbnail. No object has been specified.'),'error');
}