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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 content = document.getElementById('content');
route();
window.addEventListener('hashchange', route);
function route() {
const latLon = parseLatLon(location.hash.slice(1));
content.innerHTML = '';
if (!latLon) {
document.title = 'Share a location';
content.append(createEl('h1', {}, ['not yet implemented']));
} else {
document.title = 'Open location';
content.append(createEl('p', {}, ['Open in']));
const linkList = createEl('ul');
const [lat, lon] = latLon;
for (const linkSpec of LINKS) {
const url = linkSpec.url.replace('{lat}', lat).replace('{lon}', lon);
const link = createEl('a', { href: url }, [linkSpec.label]);
linkList.append(createEl('li', {}, [link]));
}
content.append(linkList);
}
}
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];
}
function createEl(tag, attrs = {}, content = []) {
const el = document.createElement(tag);
for (const [name, value] of Object.entries(attrs)) {
el.setAttribute(name, value);
}
for (const child of content) {
el.append(child);
}
return el;
}
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