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| <html>
<head>
<title>FOAM Map API Example</title>
<script src="https://unpkg.com/deck.gl@^8.0.0/dist.min.js"></script>
<script src="https://unpkg.com/latlon-geohash@^1.1.0/latlon-geohash.js"></script>
<script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.7.0/mapbox-gl.js"></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.7.0/mapbox-gl.css' rel='stylesheet' />
<style type="text/css">
body {
width: 100vw;
height: 100vh;
margin: 0;
}
#tooltip {
position: absolute;
z-index: 1;
pointer-events: none;
color: #FFFFFF;
padding: 0 16px;
max-width: 320px;
border-radius: 12px;
background: rgba(38, 171, 95, 0.9)
}
</style>
</head>
<body>
<canvas id="deck-canvas"></canvas>
<div id="tooltip"></div>
</body>
<script type="text/javascript">
const {DeckGL, ScatterplotLayer} = deck;
// Colors
const FOAM_PENDING_COLOR = [46, 124, 230];
const FOAM_VERIFIED_COLOR = [38, 171, 95];
const FOAM_CHALLENGED_COLOR = [244, 128, 104];
const FOAM_REMOVED_COLOR = [255, 0, 0];
// Map layout
const BOUNDING_BOX = [
[-73.9645, 40.6885],
[-73.9845, 40.7085]
];
const INITIAL_ZOOM = 16;
const MAX_ZOOM = 16;
const RADIUS_SCALE = 50;
const RADIUS_MIN_PIXELS = 1;
const RADIUS_MAX_PIXELS = 10;
// Tooltip
var listingHashDisplayed;
var fetchingListingHash = false;
// Functions
function getCenterPoint(bounding_box) {
return [(bounding_box[0][0] + bounding_box[1][0]) / 2, (bounding_box[0][1] + bounding_box[1][1]) / 2];
}
function getPointColor(state) {
if (state && state.status && state.status.type) {
if (state.status.type === "applied") { return FOAM_PENDING_COLOR }
else if (state.status.type === "listing") { return FOAM_VERIFIED_COLOR }
else if (state.status.type === "challenged") { return FOAM_CHALLENGED_COLOR }
} else {
return FOAM_REMOVED_COLOR
}
}
function getPointCoords(geohash) {
coords = Geohash.decode(geohash);
return [coords['lon'], coords['lat'], 0];
}
// For hovered point,
// Load data from external source
// Inject data in tooltip
function updateTooltipDescription(listingHash) {
if (!fetchingListingHash && listingHashDisplayed !== listingHash) {
fetchingListingHash = true
fetch('https://map-api-direct.foam.space/poi/' + listingHash)
.then(response => response.json())
.then((json) => {
if (json && json.data && json.data.data) {
const el = document.getElementById('tooltip');
const tooltip = `<h3>${json.data.data.name}</h3><p>${json.data.data.description}</p>`
el.innerHTML = tooltip;
listingHashDisplayed = listingHash
fetchingListingHash = false
}
});
}
}
// Load data from external source
// Use data in a new DeckGL object
const DATA_URL = 'https://map-api-direct.foam.space/poi/filtered?swLng=' + BOUNDING_BOX[0][0] + '&swLat=' + BOUNDING_BOX[0][1] + '&neLng=' + BOUNDING_BOX[1][0] + '&neLat=' + BOUNDING_BOX[1][1] + '&status=listing&sort=most_value&limit=100&offset=0'
fetch(DATA_URL)
.then(response => response.json())
.then(data =>
new DeckGL({
mapboxApiAccessToken: '<mapbox-access-token>', // Replace with your Mapbox access token
mapStyle: 'mapbox://styles/mapbox/dark-v10',
initialViewState: {
longitude: getCenterPoint(BOUNDING_BOX)[0],
latitude: getCenterPoint(BOUNDING_BOX)[1],
zoom: INITIAL_ZOOM,
maxZoom: MAX_ZOOM,
},
layers: [
new ScatterplotLayer({
id: 'scatter-plot',
data,
radiusScale: RADIUS_SCALE,
radiusMinPixels: RADIUS_MIN_PIXELS,
radiusMaxPixels: RADIUS_MAX_PIXELS,
getPosition: d => getPointCoords(d['geohash']),
getFillColor: d => getPointColor(d.state),
pickable: true,
onHover: ({object, x, y}) => {
const el = document.getElementById('tooltip');
if (object) {
updateTooltipDescription(object.listingHash);
el.style.display = 'block';
el.style.left = x + 'px';
el.style.top = y + 'px';
} else {
el.style.display = 'none';
el.innerHTML = '';
listingHashDisplayed = '';
}
}
})
]
})
);
</script>
</html>
|