geofield.module

<?php

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

use Drupal\Core\Template\Attribute;

/**
 * Point feature constant.
 *
 * @var string
 */
define('GEOFIELD_TYPE_POINT', 'POINT');

/**
 * Multipoint feature constant.
 *
 * @var string
 */
define('GEOFIELD_TYPE_MULTIPOINT', 'MULTIPOINT');

/**
 * Linestring feature constant.
 *
 * @var string
 */
define('GEOFIELD_TYPE_LINESTRING', 'LINESTRING');

/**
 * Multilinestring feature constant.
 *
 * @var string
 */
define('GEOFIELD_TYPE_MULTILINESTRING' , 'MULTILINESTRING');

/**
 * Polygon feature constant.
 *
 * @var string
 */
define('GEOFIELD_TYPE_POLYGON', 'POLYGON');

/**
 * Multipolygon feature constant.
 *
 * @var string
 */
define('GEOFIELD_TYPE_MULTIPOLYGON', 'MULTIPOLYGON');

/* *
 * 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_theme().
 */
function geofield_theme() {
  return array(
    'geofield_proximity' => array(
      'render element' => 'element',
    ),
  );
}

/**
 * Returns options for radius of the Earth.
 */
function geofield_radius_options() {
  return array(
    GEOFIELD_KILOMETERS => t('Kilometers'),
    GEOFIELD_METERS => t('Meters'),
    GEOFIELD_MILES => t('Miles'),
    GEOFIELD_YARDS => t('Yards'),
    GEOFIELD_FEET => t('Feet'),
    GEOFIELD_NAUTICAL_MILES => t('Nautical Miles'),
  );
}

function geofield_haversine($options = array()) {
  $formula = '( :earth_radius * ACOS( COS( RADIANS(:origin_latitude) ) * COS( RADIANS(:destination_latitude) ) * COS( RADIANS(:destination_longitude) - RADIANS(:origin_longitude) ) + SIN( RADIANS(:origin_latitude) ) * SIN( RADIANS(:destination_latitude) ) ) )';

  foreach ($options as $key => $option) {
    if (is_numeric($option)) {
      $formula = str_replace(':' . $key, $option, $formula);
    }
    else {
      $formula = str_replace(':' . $key, db_escape_field($option), $formula);
    }
  }

  return $formula;
}

/**
 * Theme wrapper for form item
 */
function theme_geofield_proximity($vars) {
  $element = $vars['element'];

  $attributes = !empty($element['#wrapper_attributes']) ? $element['#wrapper_attributes'] : array('class' => array());
  $attributes['class'][] = 'geofield-proximity-field-wrapper';
  $attributes['class'][] = 'clearfix';

  $wrapper_attributes = array();
  $wrapper_attributes['class'][] = 'clearfix';

  if (isset($element['#children']))
    $element['#children'] = '<div id="' . $element['#id'] . '" ' . new Attribute($wrapper_attributes) . '>' . $element['#children'] . '</div>';

  $output = '<div ' . new Attribute($attributes) . '>' . render($vars) . '</div>';

  return $output;
}