islandora_cc_badge.module

<?php
/**
 * @file
 * CC Badges
 */

/**
 * Implements hook_menu().
 */
function islandora_cc_badge_menu() {
  return array(
    'admin/islandora/tools/badges/creativecommons' => array(
      'title' => 'Creative Commons',
      'description' => 'Configure Creative Commons badge settings.',
      'page callback' => 'drupal_get_form',
      'page arguments' => array('islandora_cc_badge_admin_form'),
      'access arguments' => array('administer site configuration'),
      'type' => MENU_LOCAL_TASK,
      'file' => 'includes/admin.form.inc',
    ),
  );
}

/**
 * Implements hook_block_info().
 */
function islandora_cc_badge_block_info() {
  return array(
    'islandora_cc_badge_badge' => array(
      'visibility' => BLOCK_VISIBILITY_LISTED,
      'pages' => 'islandora/object/*',
      'cache' => DRUPAL_CACHE_PER_PAGE,
      'info' => t('Islandora CC License Badge'),
    ),
  );
}

function islandora_cc_badge_get_license(AbstractObject $object) {
  // Gets the rightsstatements.org URI from the configured Solr field.
  $qp = new islandoraSolrQueryProcessor();
  $qp->buildQuery(format_string('@field:"@pid"', array(
    '@field' => 'PID',
    '@pid' =>"{$object->id}")
  ));
  $uri_field = variable_get('islandora_cc_badge_license_field', 'dc.rights');
  $qp->solrParams['fl'] = implode(', ', array(
    'PID',
    $uri_field,
  ));
  $qp->solrStart = 0;
  $qp->solrLimit = 100000;
  $qp->executeQuery(FALSE);
  if ($qp->islandoraSolrResult['response']['numFound'] > 0) {
    if (array_key_exists($uri_field, $qp->islandoraSolrResult['response']['objects']['0']['solr_doc'])) {
      $license_uri_array = ($qp->islandoraSolrResult['response']['objects']['0']['solr_doc'][$uri_field]);
      foreach ($license_uri_array as $uri) {
        if (strpos($uri, 'creativecommons.org')) {
          $license_uri = $uri;
        }
      }
    }
  }
  if (!isset($license_uri)) {
    return;
  }
  else {
    return $license_uri;
  }
}


/**
 * Implements hook_block_view().
 */
function islandora_cc_badge_block_view($delta = '') {
  module_load_include('inc', 'islandora_badges', 'includes/utilities');
  $to_render = array();

  if ($delta == 'islandora_cc_badge_badge') {
    $object = menu_get_object('islandora_object', 2);
    if ($object) {
      // Check CModel against Badges configuration.
      if (islandora_badges_show_for_cmodel($object)) {
        $license_uri = islandora_cc_badge_get_license($object);
        if ($license_uri == "https://creativecommons.org/publicdomain/mark/1.0/") {
          $result_final = '<a href="' . $license_uri . '" target="_blank"><img src="https://licensebuttons.net/p/mark/1.0/88x31.png"></a>';
        }
        else {
          // Set API endpoint URL
          $url = "http://api.creativecommons.org/rest/1.5";
          $request_url = $url . '/details?license-uri=' . $license_uri;
          // Make the request and get results!
          $result_xml = drupal_http_request($request_url);
          if (!isset($result_xml->error)) {
            $result_json = json_encode($result_xml);
            $result_array = json_decode($result_json, TRUE);
            $result_data = $result_array['data'];
            // Trim the result to show just the image and link.
            $result_final = strstr($result_data, '<a rel="license"');
            $result_final = strstr($result_final, '<br/>', true);
          }
        }
      }
    }
    if (isset($result_final)) {
      $to_render['content'] = $result_final;
    }
  }
  return $to_render;
}