array( 'label' => 'Geofield', 'description' => t('This field stores geo information.'), 'default_widget' => 'geofield_wkt', 'default_formatter' => 'geofield_wkt', 'settings' => array( 'srid' => '4326', 'backend' => 'default', ), 'property_type' => 'geofield', 'property_callbacks' => array('geofield_property_info_callback'), 'microdata' => TRUE, ), ); } /** * Implements hook_field_update_field. * * If a geofield has been created, check to see if the plugin controlling it * defines a 'postinstall' callback, if so, call it. */ function geofield_field_update_field($field, $prior_field, $has_data) { if ($field['type'] == 'geofield') { $backend = ctools_get_plugins('geofield', 'geofield_backend', $field['settings']['backend']); if (!empty($backend['update_field'])) { $postinstall_callback = $backend['update_field']; $postinstall_callback($field, $prior_field, $has_data); } } } /** * Implements hook_field_update_instance(). * * We implement this hook to prevent instance settings that may not apply to our different * widgets from breaking when switching widgets. See http://drupal.org/node/1840920. */ function geofield_field_update_instance($instance, $prior_instance) { if (!empty($instance['widget']['type']) && !empty($prior_instance['widget']['type']) && $instance['widget']['type'] != $prior_instance['widget']['type']) { $instance['default_value'] = array(); _field_write_instance($instance, TRUE); field_cache_clear(); } } /** * Implements hook_field_delete_field. * * If a geofield has been deleted, check to see if the plugin controlling it * defines a 'postdelete' callback, if so, call it. */ function geofield_field_delete_field($field) { if ($field['type'] == 'geofield') { $backend = ctools_get_plugins('geofield', 'geofield_backend', $field['settings']['backend']); if (!empty($backend['delete_field'])) { $delete_field_callback = $backend['delete_field']; $delete_field_callback($field); } } } /** * Implements hook_field_settings_form(). */ function geofield_field_settings_form($field, $instance, $has_data) { ctools_include('plugins'); $settings = $field['settings']; $backend_options = array(); $backends = ctools_get_plugins('geofield', 'geofield_backend'); foreach ($backends as $id => $backend) { if (isset($backend['requirements'])) { if ($backend['requirements']) { $callback = $backend['requirements']; $error = ''; if (!$callback($error)) { $form['backend_error'][] = array( //@@TODO: Use t() func //@@TODO: css to add some red and bold '#markup' => '

' . $backend['title'] . ' not usable because ' . $error . '

', ); continue; } } } $backend_options[$id] = $backend['title']; } $form['backend'] = array( '#type' => 'select', '#title' => 'Storage Backend', '#default_value' => $settings['backend'], '#options' => $backend_options, '#description' => "Select the Geospatial storage backend you would like to use to store geofield geometry data. If you don't know what this means, select 'Default'.", '#disabled' => $has_data, ); $form['settings'] = array( '#tree' => TRUE, ); // Expose backend-settings, if they have them foreach ($backends as $id => $backend) { if (isset($backend['settings'])) { if ($backend['settings']) { $callback = $backend['settings']; $form[$id] = array( '#type' => 'fieldset', '#tree' => TRUE, '#title' => $backend['title'] . ' Settings', '#states' => array( 'visible' => array( ':input[name="field[settings][backend]"]' => array('value' => $id), ), ), ); $form[$id] = array_merge($form[$id], $callback($field, $instance, $has_data)); } } } return $form; } /** * Implements hook_field_validate(). */ function geofield_field_validate($entity_type, $entity, $field, $instance, $langcode, $items, &$errors) { ctools_include('plugins'); $backend = ctools_get_plugins('geofield', 'geofield_backend', $field['settings']['backend']); foreach ($items as $delta => $item) { $geom_empty = geofield_geom_is_empty($item); // Required field empty. if ($instance['required'] && $geom_empty) { $errors[$field['field_name']][$langcode][$delta][] = array( 'error' => 'data_missing', 'message' => t('%name is required and must not be empty.', array('%name' => $instance['label'])), ); } else { // Geometry errors. if ($geom_empty) { return FALSE; } else { $error = geofield_validate_geom($item); if ($error) { $errors[$field['field_name']][$langcode][$delta][] = array( 'error' => 'data_faulty', 'message' => t('%name: Specified location data is invalid.', array('%name' => $instance['label'])), ); } if (!empty($backend['validate'])) { $validate_callback = $backend['validate']; $error = $validate_callback($item); if ($error) { $errors[$field['field_name']][$langcode][$delta][] = array( 'error' => 'data_faulty', 'message' => t('%name: Specified location data is invalid.', array('%name' => $instance['label'])), ); } } } } } } /** * Validates input data against the geometry processor * @param array $item * Geometry field submission * @return \Exception|null * If validates, return NULL, else error text */ function geofield_validate_geom($item) { if (is_string($item)) { try { $values = geofield_compute_values($item); } catch (Exception $e) { return $e; } } else { try { $input_format = !empty($item['input_format']) ? $item['input_format'] : NULL; $values = geofield_compute_values($item['geom'], $input_format); } catch (Exception $e) { return $e; } } return NULL; } /** * Check whether geometry is empty * @param array $item * Geometry field submission * @return boolean * If empty, return TRUE */ function geofield_geom_is_empty($item) { if (!empty($item['input_format'])) { switch ($item['input_format']) { case 'wkt': if (empty($item['geom'])) { return TRUE; } break; case 'lat/lon': if (empty($item['geom']['lat']) || empty($item['geom']['lon'])) { return TRUE; } break; case 'bounds': if (empty($item['geom']['top']) || empty($item['geom']['right']) || empty($item['geom']['bottom']) || empty($item['geom']['left'])) { return TRUE; } break; case 'json': if (empty($item['geom'])) { return TRUE; } break; } } else { return empty($item['geom']); } } /** * Implements hook_field_presave(). */ function geofield_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) { if ($field['type'] === 'geofield') { /** * Edge case. Currently, Drupal will set a field value to the default value if the current value * is empty, even if it's set by the user. This bypasses our validation, and currently non-valid WKB * data in geom causes catastrophic failures in entity_load. To compensate, we add the default value * in early. When the core issue is fixed, we should drop this code. * * Geofield Issue: http://drupal.org/node/1886852 * Core Issue: http://drupal.org/node/1253820 */ if ($instance['required'] == 0 && empty($items)) { $entity_ids = entity_extract_ids($entity_type, $entity); if (empty($entity_ids[0])) { $items = isset($instance['default_value']) ? array($instance['default_value']) : array(); } } ctools_include('plugins'); $backend = ctools_get_plugins('geofield', 'geofield_backend', $field['settings']['backend']); $save_callback = $backend['save']; // For each delta, we compute all the auxiliary columns and transform the geom column into a geometry object // We then pass the geometry object (now stored in the geom column) to the backend to prepare it for insertion into the database foreach ($items as $delta => $item) { $items[$delta] = geofield_compute_values($item); if (isset($items[$delta]['geom']) && $items[$delta]['geom']) { $items[$delta]['geom'] = $save_callback($items[$delta]['geom']); } } } } /** * Implements hook_field_load(). * * Geofield stores it's data as WKB, but a binary format can cause * issues/confusion with working with other modules, notably Services. * To improve DX/discoverability of what we're storing, we convert * to WKT on load. */ function geofield_field_load($entity_type, $entities, $field, $instances, $langcode, &$items, $age) { geophp_load(); if (geoPHP::geosInstalled()) { // process geometry directly with GEOS to help with performance/memory issues. $reader = new GEOSWKBReader(); $writer = new GEOSWKTWriter(); $writer->setTrim(TRUE); foreach ($entities as $id => $entity) { foreach ($items[$id] as $delta => $item) { if (!empty($item['geom'])) { $raw_geom = unpack('H*', $item['geom']); $geom = $reader->readHEX($raw_geom[1]); $items[$id][$delta]['geom'] = $writer->write($geom); } } } } else { foreach ($entities as $id => $entity) { foreach ($items[$id] as $delta => $item) { if (!empty($item['geom'])) { $geom = geophp::load($item['geom']); if ($geom) { $items[$id][$delta]['geom'] = $geom->out('wkt'); } } } } } } /** * Implements hook_content_is_empty(). */ function geofield_field_is_empty($item, $field) { if (isset($item['input_format'])) { switch ($item['input_format']) { case GEOFIELD_INPUT_LAT_LON: return ((trim($item['geom']['lat']) == '') || (trim($item['geom']['lon']) == '')); case GEOFIELD_INPUT_BOUNDS: return ((trim($item['geom']['top']) == '') || (trim($item['geom']['right']) == '') || (trim($item['geom']['bottom']) == '') || (trim($item['geom']['left']) == '')); } } //@@TODO: Check if it's an empty geometry as per geoPHP $geometry->empty() return empty($item['geom']); } /** * Implements hook_view_api(). */ function geofield_views_api() { return array( 'api' => '3.0', 'path' => drupal_get_path('module', 'geofield') . '/views', ); } /** * Implements hook_ctools_plugin_type(). */ function geofield_ctools_plugin_type() { return array( 'geofield_backend' => array(), 'behaviors' => array( 'use hooks' => TRUE, ) ); } /** * Implements hook_ctools_plugin_api(). */ function geofield_ctools_plugin_api($module, $api) { return array('version' => 1); } /** * Implementation of hook_ctools_plugin_directory(). */ function geofield_ctools_plugin_directory($module, $plugin) { if ($plugin == 'geofield_backend') { return 'includes/' . $plugin; } } /** * Geofield Compute Values * * @todo: documentation * Steps: * 1. Load the geoPHP library * 2. Load the Geometry object from the master-column * 3. Get out all the computer values from the Geometry object * 4. Set all the values */ function geofield_compute_values($raw_data, $input_format = NULL) { // If raw_data is NULL, false, or otherwise empty, just return an empty array of values if (empty($raw_data)) { return array(); } // Load up geoPHP to do the conversions $geophp = geophp_load(); if (!$geophp) { drupal_set_message(t("Unable to load geoPHP library. Not all values will be calculated correctly"), 'error'); return; } $geometry = geofield_geometry_from_values($raw_data, $input_format); // Get values from geometry if (!empty($geometry)) { $values = geofield_get_values_from_geometry($geometry); } else { $values = array(); } return $values; } /** * Primary function for processing geoPHP geometry objects from raw data. * @param $raw_data * The info we're trying to process. Valid input can be a string or an array. If $raw_data is a string, * the value is passed directly to geophp for parsing. If $raw_data is an array (as is expected for Lat/Lon or * Bounds input), process into raw WKT and generate geometry object from there. * @param $input_format * Geofield module defined constants that specify a specific type of input. Useful for ensuring that only a specific * type of data is valid (i.e., if we're expecting WKT, valid GeoJSON doesn't get processed). * @return * A populated geoPHP geometry object if valid geometry, no return otherwise. * * @TODO: Refactor the function to not check for $input_format from both the optional secondary parameter and * an array item in $raw_data. This is probably an artifact from how Geofield's widgets pass data to various field * hooks. We should only check the optional secondary parameter. * @TODO: Move constants from geofield.widgets.inc to geofield.module * @TODO: Provide useful failure return (FALSE) */ function geofield_geometry_from_values($raw_data, $input_format = NULL) { // Load up geoPHP to do the conversions $geophp = geophp_load(); if (!$geophp) { drupal_set_message(t("Unable to load geoPHP library. Not all values will be calculated correctly"), 'error'); return; } if (is_array($raw_data)) { if (!empty($raw_data['input_format'])) { if ($raw_data['input_format'] == GEOFIELD_INPUT_LAT_LON) { $geometry = new Point($raw_data['geom']['lon'], $raw_data['geom']['lat']); } elseif ($raw_data['input_format'] == GEOFIELD_INPUT_BOUNDS) { $wkt_bounds_format = 'POLYGON((left bottom,right bottom,right top,left top,left bottom))'; $wkt = strtr($wkt_bounds_format, array('top' => $raw_data['geom']['top'], 'right' => $raw_data['geom']['right'], 'bottom' => $raw_data['geom']['bottom'], 'left' => $raw_data['geom']['left'])); $geometry = geoPHP::load($wkt); } else { $geometry = geoPHP::load($raw_data['geom'], $raw_data['input_format']); } } else { // No input format - let geoPHP figure it out if (!empty($raw_data['geom'])) { $geometry = geoPHP::load($raw_data['geom']); } // Special case, raw input (Services/Feeds) that only specifies lat/lon. elseif (!empty($raw_data['lat']) && !empty($raw_data['lon'])) { $geometry = new Point($raw_data['lon'], $raw_data['lat']); } } } else { if ($input_format) { $geometry = geoPHP::load($raw_data, $input_format); } else { // All we have at this point is a raw string. let GeoPHP figure it out $geometry = geoPHP::load($raw_data); } } if (isset($geometry)) { return $geometry; } } /** * Given a geometry object from geoPHP, return a values array */ function geofield_get_values_from_geometry($geometry) { $values = array(); $centroid = $geometry->getCentroid(); $bounding = $geometry->getBBox(); $values['geom'] = $geometry->out('wkb'); $values['geo_type'] = drupal_strtolower($geometry->getGeomType()); if ($centroid) { $values['lat'] = $centroid->y(); $values['lon'] = $centroid->x(); } $values['top'] = $bounding['maxy']; $values['bottom'] = $bounding['miny']; $values['right'] = $bounding['maxx']; $values['left'] = $bounding['minx']; // Truncate geohash to max length. $values['geohash'] = substr($geometry->out('geohash'), 0, GEOFIELD_GEOHASH_LENGTH); return $values; } // Latitude and Longitude string conversion // ---------------------------------------- /** * Decimal-Degrees-Seconds to Decimal Degrees * * Converts string to decimal degrees. Has some error correction for messy strings */ function geofield_latlon_DMStoDEC($dms) { if (is_numeric($dms)) { // It's already decimal degrees, just return it return $dms; } // If it contains both an H and M, then it's an angular hours if (stripos($dms, 'H') !== FALSE && stripos($dms, 'M') !== FALSE) { $dms = strtr($dms, "'\"HOURSMINTECNDAhoursmintecnda", " "); $dms = preg_replace('/\s\s+/', ' ', $dms); $dms = explode(" ", $dms); $deg = $dms[0]; $min = $dms[1]; $sec = $dms[2]; $dec = floatval(($deg*15) + ($min/4) + ($sec/240)); return $dec; } // If it contains an S or a W, then it's a negative if (stripos($dms, 'S') !== FALSE || stripos($dms, 'W') !== FALSE) { $direction = -1; } else { $direction = 1; } // Strip all characters and replace them with empty space $dms = strtr($dms, "�'\"NORTHSEAWnorthseaw'", " "); $dms = preg_replace('/\s\s+/', ' ', $dms); $dms = explode(" ", $dms); $deg = $dms[0]; $min = $dms[1]; $sec = $dms[2]; // Direction should be checked only for nonnegative coordinates $dec = floatval($deg+((($min*60)+($sec))/3600)); if ($dec > 0) { $dec = $direction * $dec; } return $dec; } /** * Decimal Degrees to Decimal-Degrees-Seconds * * Converts decimal longitude / latitude to DMS ( Degrees / minutes / seconds ) */ function geofield_latlon_DECtoDMS($dec, $axis) { if ($axis == 'lat') { if ($dec < 0) $direction = 'S'; else $direction = 'N'; } if ($axis == 'lon') { if ($dec < 0) $direction = 'W'; else $direction = 'E'; } $vars = explode(".", $dec); $deg = abs($vars[0]); if (isset($vars[1])) { $tempma = "0." . $vars[1]; } else { $tempma = "0"; } $tempma = $tempma * 3600; $min = floor($tempma / 60); $sec = $tempma - ($min*60); return $deg . "° " . $min . "' " . round($sec, 3) . "\" " . $direction; } /** * Decimal Degrees to Celestial coordinate system (CCS) units * * Converts decimal latitude to DMS ( Degrees / minutes / seconds ) and decimal longitude to Angular Hours / Minutes / Seconds */ function geofield_latlon_DECtoCCS($dec, $axis) { // Declination (celestial latitude) should be representeted in Degrees / minutes / seconds if ($axis == 'lat') { $vars = explode("." , $dec); $deg = $vars[0]; if (isset($vars[1])) { $tempma = "0." . $vars[1]; } else { $tempma = "0"; } $tempma = $tempma * 3600; $min = floor($tempma / 60); $sec = $tempma - ($min*60); return $deg . "° " . $min . "' " . round($sec, 3) . "\""; } // Right ascension (celestial longitude) should be representeted in Hours / Minutes / Seconds if ($axis == 'lon') { $tempma = $dec / 15; $vars = explode(".", $tempma); $hrs = $vars[0]; if (isset($vars[1])) { $tempma = "0." . $vars[1]; } else { $tempma = "0"; } $tempma = $tempma * 60; $vars = explode(".", $tempma); $min = $vars[0]; if (isset($vars[1])) { $tempma = "0." . $vars[1]; } else { $tempma = "0"; } $sec = $tempma * 60; return $hrs . "h " . $min . "m " . round($sec, 3) . "s"; } } /** * Haversine formula, useful for injecting into an SQL statement. In instances where it isn't possible to pass in variables dynamically (i.e. field * definitions), this function will bake in values directly into the snippet. * * @param $options * An array of parameters that can be passed along to be injected directly into the SQL snippet. The following array keys are checked... * - origin_latitude * - origin_longitude * - destination_latitude * - destination_longitude * - earth_radius * * @return * A string suitable for injection into DBTNG. Any option passed into the function will be baked into the string directly. Any variable missing will * be represented as :[variable]. (i.e. :earth_radius). */ function geofield_haversine($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; } /** * Helper function to get all geofield fields. * * @return * an array of field definitions for all geofields as defined by field_info_fields(). */ function _geofield_get_geofield_fields() { $geofield_fields = array(); $fields = field_info_fields(); foreach ($fields as $field => $info) { if ($info['type'] == 'geofield') { $geofield_fields[$field] = $info; } } return $geofield_fields; }