Antoni Nuñez Romeu
39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
export function haversineKm(lat1, lon1, lat2, lon2) {
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const R = 6371;
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const dLat = ((lat2 - lat1) * Math.PI) / 180;
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const dLon = ((lon2 - lon1) * Math.PI) / 180;
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const a =
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Math.sin(dLat / 2) ** 2 +
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Math.cos((lat1 * Math.PI) / 180) *
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Math.cos((lat2 * Math.PI) / 180) *
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Math.sin(dLon / 2) ** 2;
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return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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}
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export function getUserPosition() {
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return new Promise((resolve, reject) => {
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if (!navigator.geolocation) {
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reject(new Error('Geolocalización no compatible con este navegador'));
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return;
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}
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if (typeof window !== 'undefined' && window.isSecureContext === false) {
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reject(new Error('La geolocalización requiere HTTPS (o localhost)'));
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return;
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}
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navigator.geolocation.getCurrentPosition(
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pos => resolve({ lat: pos.coords.latitude, lon: pos.coords.longitude }),
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err => {
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console.error('[geo] getCurrentPosition failed — code:', err && err.code, 'message:', err && err.message);
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reject(err);
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},
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{ timeout: 15000, maximumAge: 60000, enableHighAccuracy: false }
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);
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});
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}
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export function formatDistance(km) {
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if (km < 1) return `${Math.round(km * 1000)} m`;
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if (km < 10) return `${km.toFixed(1)} km`;
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return `${Math.round(km)} km`;
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}
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