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import { useEffect, useState } from 'react';
import { map } from './Map';
import { useEffectAsync } from '../reactHelper';
import { geofenceToFeature } from './mapUtil';
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(() => {
map.getSource(id).setData({
type: 'FeatureCollection',
features: geofences.map(geofenceToFeature)
});
}, [geofences]);
return null;
}
export default GeofenceMap;
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