terriajs/lib/Models/updateRectangleFromRegion.js

Geospatial data visualization platform.

'use strict';

/*global require*/
var defined = require('terriajs-cesium/Source/Core/defined');
var GeoJsonCatalogItem = require('./GeoJsonCatalogItem');

/**
 * Updates the {@link CatalogItem#rectangle} property of a {@link CatalogItem} to be the bounding rectangle
 * of a given region.
 * @param {CatalogItem} catalogItem The catalog item to update.
 * @param {RegionProvider} regionProvider The region provider.
 * @param {Object} region The region from which to update the rectangle.  The region must be known to the region provider.
 * @return {Promise} A promise that resolves when the rectangle has been updated.  This promise silently resolves
 *                   if an error occurs while trying to update the rectangle.
 */
var updateRectangleFromRegion = function(catalogItem, regionProvider, region) {
    return regionProvider.getRegionFeature(catalogItem.terria, region).then(function(feature) {
        if (defined(feature) && feature.type === 'Feature') {
            var geojsonCatalogItem = new GeoJsonCatalogItem(catalogItem.terria);
            geojsonCatalogItem.data = feature;
            return geojsonCatalogItem.load().then(function() {
                catalogItem.rectangle = geojsonCatalogItem.rectangle;
            });
        }
    }).otherwise(function() {
    });
};

module.exports = updateRectangleFromRegion;