geofield_map-8.x-2.67/js/geojson.js

/**
 * @file
 * Javascript for the Geojson Google Maps.
 *
 * @source: https://github.com/JasonSanford/GeoJSON-to-Google-Maps
 */

(function ($, Drupal) {

  'use strict';

  Drupal.googleGeoJson = function (geojson, options) {

    let _geometryToGoogleMaps = function (geojsonGeometry, opts, geojsonProperties) {

      let googleObj;
      let bounds;
      let paths = [];
      let path = [];
      let i;
      let j;
      let k;
      let coord;
      let ll;

      switch (geojsonGeometry.type) {
        case 'Point':
          opts.position = new google.maps.LatLng(geojsonGeometry.coordinates[1], geojsonGeometry.coordinates[0]);
          bounds = new google.maps.LatLngBounds();
          bounds.extend(opts.position);
          googleObj = new google.maps.Marker(opts);
          googleObj.set('bounds', bounds);
          if (geojsonProperties) {
            googleObj.set('geojsonProperties', geojsonProperties);
          }
          break;

        case 'MultiPoint':
          googleObj = [];
          bounds = new google.maps.LatLngBounds();
          for (i = 0; i < geojsonGeometry.coordinates.length; i++) {
            opts.position = new google.maps.LatLng(geojsonGeometry.coordinates[i][1], geojsonGeometry.coordinates[i][0]);
            bounds.extend(opts.position);
            googleObj.push(new google.maps.Marker(opts));
          }
          if (geojsonProperties) {
            for (k = 0; k < googleObj.length; k++) {
              googleObj[k].set('geojsonProperties', geojsonProperties);
            }
          }
          for (k = 0; k < googleObj.length; k++) {
            googleObj[k].set('bounds', bounds);
          }
          break;

        case 'LineString':
          bounds = new google.maps.LatLngBounds();
          path = [];
          for (i = 0; i < geojsonGeometry.coordinates.length; i++) {
            coord = geojsonGeometry.coordinates[i];
            ll = new google.maps.LatLng(coord[1], coord[0]);
            bounds.extend(ll);
            path.push(ll);
          }
          opts.path = path;
          googleObj = new google.maps.Polyline(opts);
          googleObj.set('bounds', bounds);
          if (geojsonProperties) {
            googleObj.set('geojsonProperties', geojsonProperties);
          }
          break;

        case 'MultiLineString':
          googleObj = [];
          bounds = new google.maps.LatLngBounds();
          for (i = 0; i < geojsonGeometry.coordinates.length; i++) {
            path = [];
            for (j = 0; j < geojsonGeometry.coordinates[i].length; j++) {
              coord = geojsonGeometry.coordinates[i][j];
              ll = new google.maps.LatLng(coord[1], coord[0]);
              bounds.extend(ll);
              path.push(ll);
            }
            opts.path = path;
            googleObj.push(new google.maps.Polyline(opts));
          }
          if (geojsonProperties) {
            for (k = 0; k < googleObj.length; k++) {
              googleObj[k].set('geojsonProperties', geojsonProperties);
            }
          }
          for (k = 0; k < googleObj.length; k++) {
            googleObj[k].set('bounds', bounds);
          }
          break;

        case 'Polygon':
          paths = [];
          bounds = new google.maps.LatLngBounds();
          for (i = 0; i < geojsonGeometry.coordinates.length; i++) {
            path = [];
            for (j = 0; j < geojsonGeometry.coordinates[i].length; j++) {
              ll = new google.maps.LatLng(geojsonGeometry.coordinates[i][j][1], geojsonGeometry.coordinates[i][j][0]);
              bounds.extend(ll);
              path.push(ll);
            }
            paths.push(path);
          }
          opts.paths = paths;
          googleObj = new google.maps.Polygon(opts);
          googleObj.set('bounds', bounds);
          if (geojsonProperties) {
            googleObj.set('geojsonProperties', geojsonProperties);
          }
          break;

        case 'MultiPolygon':
          googleObj = [];
          bounds = new google.maps.LatLngBounds();
          for (i = 0; i < geojsonGeometry.coordinates.length; i++) {
            paths = [];
            for (j = 0; j < geojsonGeometry.coordinates[i].length; j++) {
              path = [];
              for (k = 0; k < geojsonGeometry.coordinates[i][j].length; k++) {
                ll = new google.maps.LatLng(geojsonGeometry.coordinates[i][j][k][1], geojsonGeometry.coordinates[i][j][k][0]);
                bounds.extend(ll);
                path.push(ll);
              }
              paths.push(path);
            }
            opts.paths = paths;
            googleObj.push(new google.maps.Polygon(opts));
          }
          if (geojsonProperties) {
            for (k = 0; k < googleObj.length; k++) {
              googleObj[k].set('geojsonProperties', geojsonProperties);
            }
          }
          for (k = 0; k < googleObj.length; k++) {
            googleObj[k].set('bounds', bounds);
          }
          break;

        case 'GeometryCollection':
          googleObj = [];
          if (!geojsonGeometry.geometries) {
            googleObj = _error('Invalid GeoJSON object: GeometryCollection object missing \'geometries\' member.');
          }
          else {
            for (i = 0; i < geojsonGeometry.geometries.length; i++) {
              googleObj.push(_geometryToGoogleMaps(geojsonGeometry.geometries[i], opts, geojsonProperties || null));
            }
          }
          break;

        default:
          googleObj = _error('Invalid GeoJSON object: Geometry object must be one of \'Point\', \'LineString\', \'Polygon\' or \'MultiPolygon\'.');
      }

      return googleObj;

    };

    let _error = function (message) {

      return {
        type: 'Error',
        message: message
      };

    };

    let obj;

    let opts = options || {};

    switch (geojson.type) {
      case 'FeatureCollection':
        if (!geojson.features) {
          obj = _error('Invalid GeoJSON object: FeatureCollection object missing \'features\' member.');
        }
        else {
          obj = [];
          for (let y = 0; y < geojson.features.length; y++) {
            obj.push(_geometryToGoogleMaps(geojson.features[y].geometry, opts, geojson.features[y].properties));
          }
        }
        break;

      case 'GeometryCollection':
        if (!geojson.geometries) {
          obj = _error('Invalid GeoJSON object: GeometryCollection object missing \'geometries\' member.');
        }
        else {
          obj = [];
          for (let z = 0; z < geojson.geometries.length; z++) {
            obj.push(_geometryToGoogleMaps(geojson.geometries[z], opts, geojson.geometries[z].properties));
          }
        }
        break;

      case 'Feature':
        if (!(geojson.properties && geojson.geometry)) {
          obj = _error('Invalid GeoJSON object: Feature object missing \'properties\' or \'geometry\' member.');
        }
        else {
          obj = _geometryToGoogleMaps(geojson.geometry, opts, geojson.properties);
        }
        break;

      case 'Point': case 'MultiPoint': case 'LineString': case 'MultiLineString': case 'Polygon': case 'MultiPolygon':
        obj = geojson.coordinates
          ? obj = _geometryToGoogleMaps(geojson, opts, geojson.properties)
          : _error('Invalid GeoJSON object: Geometry object missing \'coordinates\' member.');
        break;

      default:
        obj = _error('Invalid GeoJSON object: GeoJSON object must be one of \'Point\', \'LineString\', \'Polygon\', \'MultiPolygon\', \'Feature\', \'FeatureCollection\' or \'GeometryCollection\'.');

    }

    return obj;
  };

})(jQuery, Drupal);