78 lines
2 KiB
JavaScript
78 lines
2 KiB
JavaScript
/* eslint-disable react/jsx-indent-props */
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/* eslint-disable import/no-absolute-path */
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/* eslint-disable import/no-absolute-path */
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/* global L */
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import { Map } from 'react-leaflet';
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import LGeo from 'leaflet-geodesy';
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import tunion from '@turf/union';
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import { check, Match } from 'meteor/check';
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// https://stackoverflow.com/questions/35394577/leaflet-js-union-merge-circles
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function unify(polyList) {
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let unionTemp;
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for (let i = 0; i < polyList.length; i += 1) {
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if (i === 0) {
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unionTemp = polyList[i].toGeoJSON();
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} else {
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unionTemp = tunion(unionTemp, polyList[i].toGeoJSON());
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}
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}
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return unionTemp;
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}
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const subsUnion = (union, options) => {
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// check(union, Match.Optional(Object));
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check(options, {
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map: Map,
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show: Boolean,
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subs: [Object],
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color: Match.Optional(String),
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fillcolor: Match.Optional(String),
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opacity: Match.Optional(Number),
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fit: Boolean
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});
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const color = options.color || '#145A32';
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const fillColor = options.fillColor || 'green';
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const opacity = options.options || 0.1;
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if (options.subs) {
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const lmap = options.map.leafletElement;
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// http://leafletjs.com/reference-1.2.0.html#layergroup
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// FeatureGroup has getBounds
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const unionGroup = new L.FeatureGroup();
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if (union) {
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lmap.removeLayer(union);
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}
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union = null;
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if (options.subs.length > 0 && options.show) {
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// http://leafletjs.com/reference-1.2.0.html#path
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const copts = {
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parts: 144
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};
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options.subs.forEach((sub) => {
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const circle = LGeo.circle([sub.location.lat, sub.location.lon], sub.distance * 1000, copts);
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circle.addTo(unionGroup);
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});
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const unionJson = unify(unionGroup.getLayers());
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union = L.geoJson(unionJson);
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union.setStyle({
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color,
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fillColor,
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fillOpacity: opacity
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});
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union.addTo(lmap);
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if (options.fit) {
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options.map.leafletElement.fitBounds(unionGroup.getBounds());
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}
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return union;
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}
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}
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return union;
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};
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export default subsUnion;
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