geofield.module

<?php

/**
 * @TODO: Provide function/method to determine version.
 */

require_once('geofield.elements.inc');
/*require_once('geofield.widgets.inc');
require_once('geofield.formatters.inc');
require_once('geofield.openlayers.inc');
require_once('geofield.feeds.inc');
require_once('geofield.apachesolr.inc');
require_once('geofield.schemaorg.inc');
require_once('geofield.microdata.inc');*/

/* *
 * Max length of geohashes (imposed by database column length).
 */
define('GEOFIELD_GEOHASH_LENGTH', 16);

/**
 * Diameter of the Earth in kilometers.
 */
define('GEOFIELD_KILOMETERS', 6371);

/**
 * Diameter of the Earth in meters.
 */
define('GEOFIELD_METERS', 6371000);

/**
 * Diameter of the Earth in miles.
 */
define('GEOFIELD_MILES', 3959);

/**
 * Diameter of the Earth in yards.
 */
define('GEOFIELD_YARDS', 6975175);

/**
 * Diameter of the Earth in feet.
 */
define('GEOFIELD_FEET', 20925525);

/**
 * Diameter of the Earth in nautical miles.
 */
define('GEOFIELD_NAUTICAL_MILES', 3444);

/**
 * Implements hook_field_info().
 */
function geofield_field_info() {
  return array(
    'geofield' => array(
      'label' => 'Geofield',
      'description' => t('This field stores geo information.'),
      'default_widget' => 'text_textfield',
      'default_formatter' => 'text_plain',
      'field item class' => 'Drupal\geofield\Type\GeofieldItem',
      'settings' => array(
        'backend' => 'geofield_backend_default',
      ),
    ),
  );
}

/**
 * Implements hook_field_is_empty().
 * @TODO: Handle empty geometries. (i.e., a WKT value of GEOMETRYCOLLECTION EMPTY)
 */
function geofield_field_is_empty($item, $field) {
  return !isset($item['value']) || $item['value'] === '';
}

/**
 * Implements hook_field_presave().
 *  - There's a decent chance this hook will go away in favor of a method on the field item class.
 */
function geofield_field_presave($entity, $field, $instance, $langcode, &$items) {
  $field_info = $instance->getField();
  $geofield_name = $field_info->id;

  // @TODO: actually check field settings ($field['settings']['backend'])
  $backendPlugin = \Drupal::service('plugin.manager.geofield_backend')->createInstance('geofield_backend_default');

  $field = $entity->get($geofield_name);

  foreach ($items as $delta => $item) {
    // @TODO: There must be a better way to do this. :-(
    $items[$delta]['value'] = $backendPlugin->save($field->offsetGet($delta)->get('value')->getValue());
    $items[$delta]['geo_type'] = $field->offsetGet($delta)->get('geo_type')->getValue();
    $items[$delta]['lat'] = $field->offsetGet($delta)->get('lat')->getValue();
    $items[$delta]['lon'] = $field->offsetGet($delta)->get('lon')->getValue();
    $items[$delta]['left'] = $field->offsetGet($delta)->get('left')->getValue();
    $items[$delta]['top'] = $field->offsetGet($delta)->get('top')->getValue();
    $items[$delta]['right'] = $field->offsetGet($delta)->get('right')->getValue();
    $items[$delta]['bottom'] = $field->offsetGet($delta)->get('bottom')->getValue();
    $items[$delta]['geohash'] = $field->offsetGet($delta)->get('geohash')->getValue();
  }
}