public function IpGeoLocPluginStyleOpenLayers::render in IP Geolocation Views & Maps 8

Transform the View result in a list of markers and render these on a map.

Overrides StylePluginBase::render

File

src/Plugin/views/style/IpGeoLocPluginStyleOpenLayers.php, line 139

Class

IpGeoLocPluginStyleOpenLayers

Views Style plugin extension for OpenLayers (if enabled).

Namespace

Drupal\ip_geoloc\Plugin\views\style

Code

public function render() {

  // This somewhat mimics function openlayers_render_map_data() and class
  // openlayers_views_style_map, function render()
  $map = openlayers_map_load(isset($this->options['map']) ? $this->options['map'] : \Drupal::state()
    ->get('openlayers_default_map', 'default'));

  // Function openlayers_build_map() invokes:
  // - hook_openlayers_map_preprocess_alter(&$map), which introduces the names
  //   of the layers we'll use: IP_GEOLOC_MARKER_LAYER_1..3 and
  //   IP_GEOLOC_VISITOR_MARKER_LAYER
  // - hook_openlayers_layers(), which creates barebone layers for the above
  // - hook_openlayers_map_alter(&$map), for modules to make final changes to
  //   the map and its layers.
  $map = openlayers_build_map($map->data);

  // Return themed map if no errors found.
  if (empty($map['errors'])) {
    ip_geoloc_plugin_style_render_fields($this);
    $locations = ip_geoloc_plugin_style_extract_locations($this);
    $center_option = !isset($this->options['center_option']) ? IP_GEOLOC_MAP_CENTER_ON_FIRST_LOCATION : $this->options['center_option'];
    $visitor_location = $this->api
      ->getVisitorLocation();
    if ($center_option == IP_GEOLOC_MAP_CENTER_ON_VISITOR && ($center_set = isset($visitor_location['longitude']))) {
      $longitude = $visitor_location['longitude'];
      $latitude = $visitor_location['latitude'];
      $map['center']['initial']['centerpoint'] = "{$longitude},{$latitude}";
    }
    elseif (($center_option == IP_GEOLOC_MAP_CENTER_OF_LOCATIONS || $center_option == IP_GEOLOC_MAP_CENTER_OF_LOCATIONS_WEIGHTED) && !empty($locations)) {
      list($latitude, $longitude) = ip_geoloc_center_of_locations($locations, $center_option == IP_GEOLOC_MAP_CENTER_OF_LOCATIONS_WEIGHTED);
      $map['center']['initial']['centerpoint'] = "{$longitude},{$latitude}";
      $center_set = TRUE;
    }
    elseif ($center_option == IP_GEOLOC_MAP_CENTER_ON_LOCATION_FROM_ARGUMENT) {
      if ($handler = $this->view->display_handler
        ->get_handler('argument', $this->options['argument'])) {
        $latitude = $handler->value['lat'];
        $longitude = $handler->value['lon'];
        $map['center']['initial']['centerpoint'] = "{$longitude},{$latitude}";
        $center_set = TRUE;
      }
    }
    foreach ($locations as $location) {
      if (isset($location->lon)) {
        $lon = $location->lon;
        $lat = $location->lat;
      }
      elseif (isset($location->longitude)) {
        $lon = $location->longitude;
        $lat = $location->latitude;
      }
      else {
        continue;
      }
      if (empty($center_set) && $center_option == IP_GEOLOC_MAP_CENTER_ON_FIRST_LOCATION) {
        $map['center']['initial']['centerpoint'] = "{$lon},{$lat}";
        $center_set = TRUE;
      }
      $feature = [
        // Only 'name' and 'description' are valid attribute names.
        // @see openlayers_behavior_popup.js
        'attributes' => [
          'description' => $location->balloon_text,
        ],
        'projection' => 'EPSG:4326',
        'wkt' => "POINT({$lon} {$lat})",
      ];
      $layer = isset($location->marker_color) && is_numeric($location->marker_color) ? $location->marker_color : 1;
      $map['layers'][IP_GEOLOC_MARKER_LAYER . $layer]['features'][] = $feature;
    }

    // See admin/structure/openlayers/maps/<map-name>/edit...
    // If "Hide empty map for Views" is ticked, then if the map has no
    // features, it should not be displayed.
    if (!empty($map['hide_empty_map'])) {
      $num_location_marker_layers = \Drupal::state()
        ->get('ip_geoloc_num_location_marker_layers', IP_GEOLOC_DEF_NUM_MARKER_LAYERS);
      for ($layer = 1; $layer <= $num_location_marker_layers; $layer++) {
        if (!empty($map['layers'][IP_GEOLOC_MARKER_LAYER . $layer]['features'])) {
          $some_location_layers = TRUE;
          break;
        }
      }
      if (empty($some_location_layers) && empty($map['layers'][IP_GEOLOC_VISITOR_MARKER_LAYER]['features'])) {

        // Nothing to show.
        return '';
      }
    }
    $js = [
      'openlayers' => [
        'maps' => [
          $map['id'] => $map,
        ],
      ],
    ];
    drupal_add_js($js, 'setting');

    // Unlike openlayers.theme.inc, theme_openlayers_map(), we use a template.
    //
    // To ensure that any controls are on the map correctly, we need to
    // wrap the map in a container, and take into account %-dimensions.
    $container_width = $map['width'];
    $container_height = $map['height'];
    $map['width'] = strpos($map['width'], '%') > 0 ? '100%' : $map['width'];
    $map['height'] = strpos($map['height'], '%') > 0 ? '100%' : $map['height'];

    // Uses ip-geoloc-openlayers.tpl.php.
    $output = theme([
      'ip_geoloc_openlayers',
    ], [
      'view' => $this->view,
      // 'options' => $this->options,.
      'map' => $map,
      'container_width' => $container_width,
      'container_height' => $container_height,
    ]);
  }
  else {
    $output = implode('<br/>', $map['errors']);
  }
  return $output;
}