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const LINKS = [
{
label: 'Google Maps',
url: 'https://www.google.com/maps/search/?api=1&query={lat},{lon}',
},
{
label: 'Apple Maps',
url: 'https://maps.apple.com/?q={lat},{lon}&t=m',
},
{
label: 'Default app',
url: 'geo:{lat},{lon}',
},
{
label: 'OpenStreetMap',
url: 'https://www.openstreetmap.org/?mlat={lat}&mlon={lon}&zoom=15&layers=M',
},
];
const heading = document.getElementById('heading');
route();
// TODO: route on hashChange
function route() {
const latLon = parseLatLon(location.hash.slice(1));
if (!latLon) {
heading.textContent = 'not yet implemented';
} else {
const linkList = document.getElementById('links');
document.getElementById('instructions').hidden = false;
document.title = 'Open location';
heading.textContent = '';
const [lat, lon] = latLon;
for (const link of LINKS) {
const li = document.createElement('li');
const a = document.createElement('a');
a.href = link.url.replace('{lat}', lat).replace('{lon}', lon);
a.textContent = link.label;
li.appendChild(a);
linkList.appendChild(li);
}
}
}
function parseLatLon(text) {
if (text == '') {
return null;
}
let [lat, lon] = text.split(',');
lat = parseFloat(lat);
lon = parseFloat(lon);
if (Number.isNaN(lat) || Number.isNaN(lon)) {
throw Error('failed to parse latitude or longitude');
}
if (lat < -180 || lat > 180 || lon < -90 || lon > 90) {
throw Error('latitude or longitude are out of range');
}
return [lat, lon];
}
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