traintrape-moi/client/components/Map.tsx

import { StyleSheet } from 'react-native'
import MapLibreGL, { Camera, FillLayer, LineLayer, MapView, PointAnnotation, RasterLayer, RasterSource, ShapeSource, UserLocation } from '@maplibre/maplibre-react-native'
import { FontAwesome5 } from '@expo/vector-icons'
import { circle } from '@turf/circle'
import { useLastOwnLocation } from '@/hooks/useLocation'

export default function Map() {
  const userLocation = useLastOwnLocation()
  MapLibreGL.setAccessToken(null)
  const accuracyCircle = circle([userLocation?.coords.longitude ?? 0, userLocation?.coords.latitude ?? 0], userLocation?.coords.accuracy ?? 0, {steps: 64, units: 'meters'})
  return (
    <MapView
      logoEnabled={false}
      style={styles.map}
      styleURL="https://openmaptiles.geo.data.gouv.fr/styles/osm-bright/style.json">
      {/* FIXME Il faudra pouvoir avoir un bouton de suivi pour activer le suivi de la caméro */}
      {userLocation && <Camera
          defaultSettings={{centerCoordinate: [userLocation?.coords.longitude, userLocation?.coords.latitude], zoomLevel: 15}} />}
      <RasterSource id="railwaymap-source" tileUrlTemplates={["https://a.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png"]}></RasterSource>
      <RasterLayer id="railwaymap-layer" sourceID="railwaymap-source" style={{rasterOpacity: 0.7}} />

      {/* FIXME Il faudra avoir uniquement les positions des autres personnes, puisque sa propre position peut être obtenue nativement */}
      <ShapeSource id="accuracy-radius" shape={accuracyCircle} />
      <FillLayer id="accuracy-radius-fill" sourceID="accuracy-radius" style={{fillOpacity: 0.4, fillColor: 'lightblue'}} aboveLayerID="railwaymap-layer" />
      <LineLayer id="accuracy-radius-border" sourceID="accuracy-radius" style={{lineOpacity: 0.4, lineColor: 'blue'}} aboveLayerID="accuracy-radius-fill" />
      <PointAnnotation id="current-location" coordinate={[userLocation?.coords.longitude ?? 2.9, userLocation?.coords.latitude ?? 46.5]}>
        <FontAwesome5 name="map-marker-alt" size={24} color="blue" />
      </PointAnnotation>
      {/* <UserLocation animated={true} renderMode="native" androidRenderMode="compass" showsUserHeadingIndicator={true} /> */}
    </MapView>
  )
}

const styles = StyleSheet.create({
  map: {
    flex: 1,
    alignSelf: 'stretch',
  }
})