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130
website/src/lib/components/map/gpx-layer/DistanceMarkers.ts
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130
website/src/lib/components/map/gpx-layer/DistanceMarkers.ts
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import { settings } from '$lib/db';
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import { gpxStatistics } from '$lib/stores';
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import type { GeoJSONSource } from 'mapbox-gl';
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import { get } from 'svelte/store';
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// const { distanceMarkers, distanceUnits } = settings;
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const stops = [
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[100, 0],
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[50, 7],
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[25, 8, 10],
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[10, 10],
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[5, 11],
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[1, 13],
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];
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export class DistanceMarkers {
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map: mapboxgl.Map;
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updateBinded: () => void = this.update.bind(this);
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unsubscribes: (() => void)[] = [];
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constructor(map: mapboxgl.Map) {
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this.map = map;
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this.unsubscribes.push(gpxStatistics.subscribe(this.updateBinded));
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this.unsubscribes.push(distanceMarkers.subscribe(this.updateBinded));
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this.unsubscribes.push(distanceUnits.subscribe(this.updateBinded));
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this.map.on('style.import.load', this.updateBinded);
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}
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update() {
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try {
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if (get(distanceMarkers)) {
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let distanceSource: GeoJSONSource | undefined =
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this.map.getSource('distance-markers');
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if (distanceSource) {
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distanceSource.setData(this.getDistanceMarkersGeoJSON());
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} else {
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this.map.addSource('distance-markers', {
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type: 'geojson',
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data: this.getDistanceMarkersGeoJSON(),
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});
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}
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stops.forEach(([d, minzoom, maxzoom]) => {
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if (!this.map.getLayer(`distance-markers-${d}`)) {
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this.map.addLayer({
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id: `distance-markers-${d}`,
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type: 'symbol',
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source: 'distance-markers',
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filter:
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d === 5
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? [
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'any',
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['==', ['get', 'level'], 5],
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['==', ['get', 'level'], 25],
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]
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: ['==', ['get', 'level'], d],
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minzoom: minzoom,
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maxzoom: maxzoom ?? 24,
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layout: {
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'text-field': ['get', 'distance'],
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'text-size': 14,
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'text-font': ['Open Sans Bold'],
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},
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paint: {
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'text-color': 'black',
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'text-halo-width': 2,
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'text-halo-color': 'white',
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},
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});
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} else {
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this.map.moveLayer(`distance-markers-${d}`);
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}
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});
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} else {
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stops.forEach(([d]) => {
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if (this.map.getLayer(`distance-markers-${d}`)) {
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this.map.removeLayer(`distance-markers-${d}`);
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}
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});
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}
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} catch (e) {
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// No reliable way to check if the map is ready to add sources and layers
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return;
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}
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}
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remove() {
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this.unsubscribes.forEach((unsubscribe) => unsubscribe());
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}
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getDistanceMarkersGeoJSON(): GeoJSON.FeatureCollection {
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let statistics = get(gpxStatistics);
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let features = [];
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let currentTargetDistance = 1;
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for (let i = 0; i < statistics.local.distance.total.length; i++) {
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if (
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statistics.local.distance.total[i] >=
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currentTargetDistance * (get(distanceUnits) === 'metric' ? 1 : 1.60934)
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) {
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let distance = currentTargetDistance.toFixed(0);
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let [level, minzoom] = stops.find(([d]) => currentTargetDistance % d === 0) ?? [
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0, 0,
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];
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features.push({
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type: 'Feature',
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geometry: {
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type: 'Point',
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coordinates: [
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statistics.local.points[i].getLongitude(),
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statistics.local.points[i].getLatitude(),
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],
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},
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properties: {
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distance,
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level,
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minzoom,
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},
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} as GeoJSON.Feature);
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currentTargetDistance += 1;
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}
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}
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return {
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type: 'FeatureCollection',
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features,
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};
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}
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}
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