tzfield_geofield.module in Time Zone Field 7

Populate a time zone field from Geofield.

File

tzfield_geofield/tzfield_geofield.module

<?php

/**
 * @file
 * Populate a time zone field from Geofield.
 */

/**
 * Implements hook_field_widget_info().
 */
function tzfield_geofield_field_widget_info() {
  return array(
    'tzfield_geofield' => array(
      'label' => t('Populate from Geofield'),
      'field types' => array(
        'tzfield',
      ),
      'behaviors' => array(
        'multiple values' => FIELD_BEHAVIOR_CUSTOM,
        'default value' => FIELD_BEHAVIOR_NONE,
      ),
    ),
  );
}

/**
 * Implements hook_field_widget_settings_form().
 */
function tzfield_geofield_field_widget_settings_form($field, $instance) {
  $widget_settings = $instance['widget']['settings'];
  $options = array();
  foreach (field_info_instances($instance['entity_type'], $instance['bundle']) as $field_name => $field_instance) {
    $field = field_info_field($field_name);
    if ($field['type'] == 'geofield') {
      $options[$field['field_name']] = $field['field_name'];
    }
  }
  $form['geofield'] = array(
    '#type' => 'select',
    '#title' => 'Geofield',
    '#options' => $options,
    '#default_value' => isset($widget_settings['geofield']) ? $widget_settings['geofield'] : '',
    '#required' => TRUE,
  );
  return $form;
}

/**
 * Implements hook_field_attach_presave().
 */
function tzfield_geofield_field_attach_presave($entity_type, $entity) {
  list(, , $bundle_name) = entity_extract_ids($entity_type, $entity);
  foreach (field_info_instances($entity_type, $bundle_name) as $field_name => $field_instance) {
    if ($field_instance['widget']['type'] == 'tzfield_geofield') {
      $geofield_value = field_get_items($entity_type, $entity, $field_instance['widget']['settings']['geofield']);
      if ($geofield_value) {
        $entity->{$field_name}[LANGUAGE_NONE][0]['value'] = _tzfield_geofield_get_timezone($geofield_value[0]['lat'], $geofield_value[0]['lon']);
      }
      else {
        $entity->{$field_name} = array();
      }
    }
  }
}

/**
 * Return timezone by location.
 */
function _tzfield_geofield_get_timezone($lat, $lon) {
  $response = file_get_contents(url('https://maps.googleapis.com/maps/api/timezone/json', array(
    'query' => array(
      'location' => $lat . ',' . $lon,
      'timestamp' => REQUEST_TIME,
      'sensor' => 'false',
      // To make API requests, you must set this API key variable.
      'key' => variable_get('tzfield_geofield_google_timezone_api_key'),
    ),
  )));
  $json = json_decode($response);
  if (!isset($json->errorMessage)) {
    return $json->timeZoneId;
  }
  watchdog('tzfield_geofield', 'Google time zone API error %status %error_message', array(
    '%status' => $json->status,
    '%error_message' => $json->errorMessage,
  ), WATCHDOG_ERROR);
}

Functions

Name	Description
tzfield_geofield_field_attach_presave	Implements hook_field_attach_presave().
tzfield_geofield_field_widget_info	Implements hook_field_widget_info().
tzfield_geofield_field_widget_settings_form	Implements hook_field_widget_settings_form().
_tzfield_geofield_get_timezone	Return timezone by location.