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import wellknown from 'wellknown';
import { useEffect, useState } from 'react';
import { map } from './Map';
import { useEffectAsync } from '../reactHelper';
import { reverseCoordinates } from './mapUtil';
import circle from '@turf/circle';
const circleToPolygon = (item) => {
let coordinates = item.area.replace(/CIRCLE|\(|\)|,/g, " ").trim().split(/ +/);
var options = { steps: 32, units: 'meters' };
let polygon = circle([Number(coordinates[1]), Number(coordinates[0])], Number(coordinates[2]), options);
return [item.name, polygon.geometry];
}
const GeofenceMap = () => {
const id = 'geofences';
const [geofences, setGeofences] = useState([]);
useEffectAsync(async () => {
const response = await fetch('/api/geofences');
if (response.ok) {
setGeofences(await response.json());
}
}, []);
useEffect(() => {
map.addSource(id, {
'type': 'geojson',
'data': {
type: 'FeatureCollection',
features: []
}
});
map.addLayer({
'source': id,
'id': 'geofences-fill',
'type': 'fill',
'filter': [
'all',
['==', '$type', 'Polygon'],
],
'paint': {
'fill-color':'#3bb2d0',
'fill-outline-color':'#3bb2d0',
'fill-opacity':0.1,
},
});
map.addLayer({
'source': id,
'id': 'geofences-line',
'type': 'line',
'paint': {
'line-color': '#3bb2d0',
'line-width': 2,
},
});
map.addLayer({
'source': id,
'id': 'geofences-title',
'type': 'symbol',
'layout': {
'text-field': '{name}',
'text-font': ['Roboto Regular'],
'text-size': 12,
},
'paint': {
'text-halo-color': 'white',
'text-halo-width': 1,
},
});
return () => {
map.removeLayer('geofences-fill');
map.removeLayer('geofences-line');
map.removeLayer('geofences-title');
map.removeSource(id);
};
}, []);
useEffect(() => {
let circleFence = geofences.filter((item => item.area.indexOf('CIRCLE') > -1)).map(circleToPolygon);
map.getSource(id).setData({
type: 'FeatureCollection',
features: geofences.map(item => [item.name, reverseCoordinates(wellknown(item.area))]).filter(([, geometry]) => !!geometry).concat(circleFence).map(([name, geometry]) => ({
type: 'Feature',
geometry: geometry,
properties: { name },
})),
});
}, [geofences]);
return null;
}
export default GeofenceMap;
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