demarches-normaliennes/app/javascript/components/MapReader/index.js

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import React, { useState, useCallback, useMemo } from 'react';
import ReactMapboxGl, { ZoomControl, GeoJSONLayer } from 'react-mapbox-gl';
import mapboxgl, { Popup } from 'mapbox-gl';
import PropTypes from 'prop-types';
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import { getMapStyle, SwitchMapStyle } from '../MapStyles';
import {
filterFeatureCollection,
filterFeatureCollectionByGeometryType,
useEvent,
findFeature,
fitBounds,
getCenter
} from '../shared/map';
const Map = ReactMapboxGl({});
const MapReader = ({ featureCollection, options }) => {
const [currentMap, setCurrentMap] = useState(null);
const [style, setStyle] = useState('ortho');
const cadastresFeatureCollection = useMemo(
() => filterFeatureCollection(featureCollection, 'cadastre'),
[featureCollection]
);
const selectionsUtilisateurFeatureCollection = useMemo(
() => filterFeatureCollection(featureCollection, 'selection_utilisateur'),
[featureCollection]
);
const selectionsLineFeatureCollection = useMemo(
() =>
filterFeatureCollectionByGeometryType(
selectionsUtilisateurFeatureCollection,
'LineString'
),
[selectionsUtilisateurFeatureCollection]
);
const selectionsPolygonFeatureCollection = useMemo(
() =>
filterFeatureCollectionByGeometryType(
selectionsUtilisateurFeatureCollection,
'Polygon'
),
[selectionsUtilisateurFeatureCollection]
);
const selectionsPointFeatureCollection = useMemo(
() =>
filterFeatureCollectionByGeometryType(
selectionsUtilisateurFeatureCollection,
'Point'
),
[selectionsUtilisateurFeatureCollection]
);
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const hasCadastres = !!cadastresFeatureCollection.length;
const mapStyle = useMemo(
() => getMapStyle(style, hasCadastres, options.mnhn),
[style, options, cadastresFeatureCollection]
);
const popup = useMemo(
() =>
new Popup({
closeButton: false,
closeOnClick: false
})
);
const onMouseEnter = useCallback(
(event) => {
const feature = event.features[0];
if (feature.properties && feature.properties.description) {
const coordinates = getCenter(feature.geometry, event.lngLat);
const description = feature.properties.description;
currentMap.getCanvas().style.cursor = 'pointer';
popup.setLngLat(coordinates).setHTML(description).addTo(currentMap);
} else {
popup.remove();
}
},
[currentMap, popup]
);
const onMouseLeave = useCallback(() => {
currentMap.getCanvas().style.cursor = '';
popup.remove();
}, [currentMap, popup]);
const onFeatureFocus = useCallback(
({ detail }) => {
const feature = findFeature(featureCollection, detail.id);
if (feature) {
fitBounds(currentMap, feature);
}
},
[currentMap, featureCollection]
);
useEvent('map:feature:focus', onFeatureFocus);
const [a1, a2, b1, b2] = featureCollection.bbox;
const boundData = [
[a1, a2],
[b1, b2]
];
const polygonSelectionFill = {
'fill-color': '#EC3323',
'fill-opacity': 0.5
};
const polygonSelectionLine = {
'line-color': 'rgba(255, 0, 0, 1)',
'line-width': 4
};
const lineStringSelectionLine = {
'line-color': 'rgba(55, 42, 127, 1.00)',
'line-width': 3
};
const pointSelectionFill = {
'circle-color': '#EC3323'
};
const polygonCadastresFill = {
'fill-color': '#FAD859',
'fill-opacity': 0.5
};
const polygonCadastresLine = {
'line-color': 'rgba(156, 160, 144, 255)',
'line-width': 2,
'line-dasharray': [1, 1]
};
function onMapLoad(map) {
setCurrentMap(map);
}
if (!mapboxgl.supported()) {
return (
<p>
Nous ne pouvons pas afficher la carte car elle est imcompatible avec
votre navigateur. Nous vous conseillons de le mettre à jour ou utiliser
les dernières versions de Chrome, Firefox ou Safari
</p>
);
}
return (
<Map
onStyleLoad={(map) => onMapLoad(map)}
fitBounds={boundData}
fitBoundsOptions={{ padding: 100 }}
style={mapStyle}
containerStyle={{
height: '400px',
width: '100%'
}}
>
<GeoJSONLayer
data={selectionsPolygonFeatureCollection}
fillPaint={polygonSelectionFill}
linePaint={polygonSelectionLine}
fillOnMouseEnter={onMouseEnter}
fillOnMouseLeave={onMouseLeave}
/>
<GeoJSONLayer
data={selectionsLineFeatureCollection}
linePaint={lineStringSelectionLine}
lineOnMouseEnter={onMouseEnter}
lineOnMouseLeave={onMouseLeave}
/>
<GeoJSONLayer
data={selectionsPointFeatureCollection}
circlePaint={pointSelectionFill}
circleOnMouseEnter={onMouseEnter}
circleOnMouseLeave={onMouseLeave}
/>
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{hasCadastres ? (
<GeoJSONLayer
data={cadastresFeatureCollection}
fillPaint={polygonCadastresFill}
linePaint={polygonCadastresLine}
/>
) : null}
<SwitchMapStyle style={style} setStyle={setStyle} ign={options.ign} />
<ZoomControl />
</Map>
);
};
MapReader.propTypes = {
featureCollection: PropTypes.shape({
type: PropTypes.string,
bbox: PropTypes.array,
features: PropTypes.array
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}),
options: PropTypes.shape({
ign: PropTypes.bool,
mnhn: PropTypes.bool
})
};
export default MapReader;