wwudora.module

<?php

/**
 * @file
 * Customizations for WWU.
 */

/**
 * Implements hook_islandora_oai_get_xsl_files().
 */
function wwudora_islandora_oai_get_xsl_files() {
  $module_path = drupal_get_path('module', 'wwudora');
  return array(
    "$module_path/xml/wwu_mods_to_dc.xsl" => 'wwu_mods_to_dc.xsl',
  );
}

/**
 * Implements hook_xml_form_builder_get_transforms().
 */
function wwudora_xml_form_builder_get_transforms() {
  $module_path = drupal_get_path('module', 'wwudora');
  return array(
    'wwu_mods_to_dc.xsl' => "$module_path/xml/wwu_mods_to_dc.xsl",
  );
}

/**
 * Implements hook_islandora_compound_object_children_added_to_parent().
 */
function wwudora_islandora_compound_object_children_added_to_parent($children, $parent_pids) {
  /* We're only taking the first entry in the $parent_pids because:
   * 1. Client expects children to only exist on one Compound Object
   * 2. Each Policy would be overwritten by subsequent parents
   */
  module_load_include('inc', 'wwudora', 'includes/derivatives');
  $parent = islandora_object_load(current($parent_pids));
  foreach ($children as $child) {
    wwudora_inherit_xacml_from_compound_parent($parent, $child);
  }
}

/**
 * Implements hook_CMODEL_PID_islandora_derivative().
 */
function wwudora_islandora_compoundcmodel_islandora_derivative($object, $ds_modified_params = array()) {
  $derivatives[] = array(
    'source_dsid' => 'POLICY',
    'weight' => '0',
    'function' => array(
      'wwudora_policy_to_children_derivatives',
    ),
    'file' => drupal_get_path('module', 'wwudora') . '/includes/derivatives.inc',
  );
  return $derivatives;
}

/**
 * Implements hook_islandora_datastream_ingested().
 */
function wwudora_islandora_datastream_ingested(AbstractObject $object, AbstractDatastream $datastream) {
  _wwudora_transform_mods_to_dc($datastream);
}

/**
 * Implements hook_islandora_datastream_modified().
 */
function wwudora_islandora_datastream_modified(AbstractObject $object, AbstractDatastream $datastream, array $params) {
  _wwudora_transform_mods_to_dc($datastream);
}

/**
 * Helper function to transform mods to dc records.
 */
function _wwudora_transform_mods_to_dc(AbstractDatastream $datastream) {
  if ($datastream->id == "MODS") {
    $module_path = drupal_get_path('module', 'wwudora');
    $transform_path = "$module_path/xml/wwu_mods_to_dc.xsl";

    $transform = new DOMDocument();
    $transform->load($transform_path);

    $xslt = new XSLTProcessor();
    $xslt->importStyleSheet($transform);

    $mods = new DOMDocument();
    $mods->loadXML($datastream->content);

    $dc = $xslt->transformToDoc($mods);
    if ($dc && isset($dc->documentElement)) {
      $object = $datastream->parent;
      $object["DC"]->setContentFromString($dc->saveXML());
    }
  }
}