Source: map-openstreetmap/src/main/resources/META-INF/resources/js/OpenStreetMapGeoJSON.es.js

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

import GeoJSONBase from '@liferay/map-common/js/GeoJSONBase.es';

/**
 * OpenStreetMapGeoJSONBase
 * @review
 */
class OpenStreetMapGeoJSONBase extends GeoJSONBase {

	/**
	 * Creates a new map geojson parser using OpenStreetMap's API
	 * @param {Array} args List of arguments to be passed to State
	 * @review
	 */
	constructor(...args) {
		super(...args);

		this._handleFeatureClicked = this._handleFeatureClicked.bind(this);
	}

	/**
	 * @inheritDoc
	 * @review
	 */
	_getNativeFeatures(geoJSONData) {
		const features = [];

		L.geoJson(geoJSONData, {
			onEachFeature: (feature, layer) => {
				layer.on('click', this._handleFeatureClicked);

				features.push(feature);
			},
		}).addTo(this.map);

		return features;
	}

	/**
	 * @inheritDoc
	 * @review
	 */
	_wrapNativeFeature(nativeFeature) {
		const feature = nativeFeature.geometry
			? nativeFeature
			: nativeFeature.target.feature;
		const geometry = feature.geometry;

		return {
			getGeometry() {
				return {
					get() {
						return L.latLng(
							geometry.coordinates[1],
							geometry.coordinates[0]
						);
					},
				};
			},

			getMarker() {
				return nativeFeature.target;
			},

			getProperty(prop) {
				return feature.properties[prop];
			},
		};
	}
}

export default OpenStreetMapGeoJSONBase;
export {OpenStreetMapGeoJSONBase};