74 lines
1.6 KiB
JavaScript
74 lines
1.6 KiB
JavaScript
(function (ns) {
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'use strict';
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const WATCH_OPTIONS = Object.freeze({
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enableHighAccuracy: true,
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timeout: 20000,
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maximumAge: 5000
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});
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let watchId = null;
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function geolocation() {
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return globalThis.navigator?.geolocation;
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}
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function normalize(position) {
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return {
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lat: position.coords.latitude,
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lon: position.coords.longitude,
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accuracy: position.coords.accuracy,
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altitude: position.coords.altitude,
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heading: position.coords.heading,
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speed: position.coords.speed,
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timestamp: position.timestamp
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};
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}
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function unsupportedError() {
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return new Error('Dieses Gerät unterstützt keine Geolokalisierung.');
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}
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ns.Geo = {
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current() {
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return new Promise((resolve, reject) => {
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const service = geolocation();
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if (!service) {
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reject(unsupportedError());
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return;
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}
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service.getCurrentPosition(
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position => resolve(normalize(position)),
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reject,
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{
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...WATCH_OPTIONS,
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timeout: ns.Config.geolocationTimeoutMs,
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maximumAge: 30000
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}
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);
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});
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},
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start(callback, onError) {
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this.stop();
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const service = geolocation();
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if (!service) {
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onError?.(unsupportedError());
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return;
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}
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watchId = service.watchPosition(
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position => callback(normalize(position)),
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onError,
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WATCH_OPTIONS
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);
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},
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stop() {
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const service = geolocation();
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if (watchId != null) service?.clearWatch(watchId);
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watchId = null;
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}
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};
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}(globalThis.Wegwichtel));
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