56 lines
2 KiB
JavaScript
56 lines
2 KiB
JavaScript
import { check } from 'meteor/check';
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import tunion from '@turf/union';
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import ttrunc from '@turf/truncate';
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import { rectangleAround } from 'map-common-utils';
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import tcircle from '@turf/circle';
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// https://stackoverflow.com/questions/35394577/leaflet-js-union-merge-circles
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const truncOptions = { precision: 6, coordinates: 2 };
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const 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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const pol = polyList[i];
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const cleanPol = ttrunc(pol, truncOptions);
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if (i === 0) {
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unionTemp = cleanPol;
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} else {
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unionTemp = ttrunc(tunion(unionTemp, cleanPol), truncOptions);
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}
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}
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return unionTemp;
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};
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const calcUnion = (L, subs, decorated, typeCircle) => {
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const unionGroup = [];
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const doCircle = (typeof typeCircle !== 'undefined') ? typeCircle : true;
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subs.forEach((osub) => {
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try {
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if (osub.location && osub.location.lat && osub.location.lon && osub.distance) {
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check(osub.location.lon, Number);
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check(osub.location.lat, Number);
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check(osub.distance, Number);
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const dsub = decorated(osub);
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const jsonPolygon = doCircle ?
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tcircle(
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[dsub.location.lon, dsub.location.lat], dsub.distance,
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{ units: 'kilometers', steps: 144 }
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) :
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rectangleAround(
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{ lon: dsub.location.lon, lat: dsub.location.lat },
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dsub.distance,
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(typeof dsub.distanceY !== 'undefined') ? dsub.distanceY : dsub.distance
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);
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unionGroup.push(jsonPolygon);
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} else {
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console.info(`Wrong element to do union ${JSON.stringify(osub)}`);
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}
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} catch (e) {
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console.error(e, `Wrong element trying to make union ${JSON.stringify(osub)}`);
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}
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});
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const unionJson = unify(unionGroup);
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return [unionJson, L.geoJSON(unionJson).getBounds()];
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};
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export default calcUnion;
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