FOAM API Example - Popup on hover

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title>FOAM API Example - Popup on hover</title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.css' rel='stylesheet' />
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/latlon-geohash@1.1.0/latlon-geohash.min.js"></script>
  
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

//see this in action: https://bl.ocks.org/FergusDevelopmentLLC/020933cd26b2133291029fce53a457fb/

//based on: https://www.mapbox.com/mapbox-gl-js/example/popup-on-hover/

// get bounding box: https://bboxfinder.com
        let mapBounds = [-74.024677, 40.695998, -73.923054, 40.802245];//Southwest corner, Northeast corner

let url = 'https://api-beta.foam.space/beacon?lat_min=' + mapBounds[0] + '&lon_min=' + mapBounds[2] + '&lat_max=' + mapBounds[1] + '&lon_max=' + mapBounds[3];
        //https://api-beta.foam.space/beacon?xmin=-74.024677&ymin=-73.923054&xmax=40.695998&ymax=40.802245

//for authenticating to the FOAM API below
        let auth = 'Bearer eyJhbGciOiJIUzUxMiJ9.eyJkYXQiOiJiZTRlYTZmY2EyNTg5NjM0NjRjYTljNGQxZjBhYmM5NTFmMGE1ZGYyIn0.PV1tnjpqMwAiei5u7nASc8mHjvwph9eUOLX8vGgt6MpJUkbCXlp9mhQj9JVqoejUglEIUZtMsfAbh1_-WXEtvw';

mapboxgl.accessToken = 'pk.eyJ1Ijoid2lsbGNhcnRlciIsImEiOiJjamV4b2g3Z2ExOGF4MzFwN3R1dHJ3d2J4In0.Ti-hnuBH8W4bHn7k6GCpGw';

// let basemap = 'basic';
        // let basemap = 'streets';
        // let basemap = 'bright';
        // let basemap = 'light';
        let basemap = 'dark';
        // let basemap = 'satellite';

// https://www.mapbox.com/api-documentation/#styles
        let map = new mapboxgl.Map({
            container: 'map',
            style: 'mapbox://styles/mapbox/' + basemap + '-v9',
            center: [(mapBounds[0] + mapBounds[2]) / 2, (mapBounds[1] + mapBounds[3]) / 2],
            zoom: 12.3
        });

map.on('load', function () {
            axios.get(
                url,
                {
                    headers: { "authorization": auth }
                })
                .then((response) => {

let geojson = GetGeoJsonFrom(response.data);

map.addSource('data', {
                        type: 'geojson',
                        data: geojson
                    });

map.addLayer({
                        id: 'beacons',
                        source: 'data',
                        type: 'circle',
                        paint: {
                            'circle-radius': 5,
                            'circle-color': '#ff00ff'
                        }
                    });

handlePopup();

},
                    (error) => {
                        let status = error.response.status
                    }
                );
        });

handlePopup = () => {

// Create a popup, but don't add it to the map yet.
            let popup = new mapboxgl.Popup({
                closeButton: false,
                closeOnClick: false
            });

map.on('mouseenter', 'beacons', function (e) {

// Change the cursor style as a UI indicator.
                map.getCanvas().style.cursor = 'pointer';

let coordinates = [e.features[0].properties.beaconLng, e.features[0].properties.beaconLat];

// Ensure that if the map is zoomed out such that multiple copies of the feature are visible, the popup appears over the copy being pointed to.
                while (Math.abs(e.lngLat.lng - coordinates[0]) > 180) {
                    coordinates[0] += e.lngLat.lng > coordinates[0] ? 360 : -360;
                }

// Populate the popup and set its coordinates based on the feature found.
                popup.setLngLat(coordinates)
                    .setHTML(tooltip_msg)
                    .addTo(map);
            });

map.on('mouseleave', 'beacons', function () {
                map.getCanvas().style.cursor = '';
                popup.remove();
            });
        }

GetGeoJsonFrom = (foamBeaconData) => {

let features = [];

for (beacon in foamBeaconData) {

// Decode the beaconGeoHash value to lat, lon using https://github.com/chrisveness/latlon-geohash
                let decodedLatLng = Geohash.decode(foamBeaconData[beacon].beaconGeohash);

// Build the geojson features array
                feature = {
                    type: 'Feature',
                    geometry: {
                        type: 'Point',
                        coordinates: [decodedLatLng.lon, decodedLatLng.lat]
                    },
                    properties: {
                        beaconTransactionHash: foamBeaconData[beacon].beaconTransactionHash,
                        beaconName: foamBeaconData[beacon].beaconName,
                        beaconGeohash: foamBeaconData[beacon].beaconGeohash,
                        beaconBeaconAddress: foamBeaconData[beacon].beaconBeaconAddress,
                        beaconFactoryAddress: foamBeaconData[beacon].beaconFactoryAddress,
                        beaconLat: decodedLatLng.lat,
                        beaconLng: decodedLatLng.lon
                    }
                };
                features.push(feature);
            }

// Add FeatureCollection wrapper
            let geojson = {
                type: 'FeatureCollection',
                features: features
            };

return geojson;

}
    </script>

</body>
</html>

https://api.tiles.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.js

https://unpkg.com/axios/dist/axios.min.js

https://cdn.jsdelivr.net/npm/latlon-geohash@1.1.0/latlon-geohash.min.js