mapcomplete/Logic/Actors/GeoLocationHandler.ts

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import * as L from "leaflet";
import {UIEventSource} from "../UIEventSource";
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import {UIElement} from "../../UI/UIElement";
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import {Utils} from "../../Utils";
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import Svg from "../../Svg";
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import Img from "../../UI/Base/Img";
export class GeoLocationHandler extends UIElement {
private readonly _isActive: UIEventSource<boolean> = new UIEventSource<boolean>(false);
private readonly _permission: UIEventSource<string> = new UIEventSource<string>("");
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private _marker: L.Marker;
private readonly _hasLocation: UIEventSource<boolean>;
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private readonly _currentGPSLocation: UIEventSource<{ latlng: any; accuracy: number }>;
private readonly _leafletMap: UIEventSource<L.Map>;
private readonly _featureSwitch: UIEventSource<boolean>;
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constructor(currentGPSLocation: UIEventSource<{ latlng: any; accuracy: number }>,
leafletMap: UIEventSource<L.Map>,
featureSwitch: UIEventSource<boolean>) {
super(undefined);
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this._currentGPSLocation = currentGPSLocation;
this._leafletMap = leafletMap;
this._featureSwitch = featureSwitch;
this._hasLocation = currentGPSLocation.map((location) => location !== undefined);
var self = this;
import("../../vendor/Leaflet.AccuratePosition.js").then(() => {
self.init();
})
}
public init() {
this.ListenTo(this._hasLocation);
this.ListenTo(this._isActive);
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this.ListenTo(this._permission);
const self = this;
function onAccuratePositionProgress(e) {
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self._currentGPSLocation.setData({latlng: e.latlng, accuracy: e.accuracy});
}
function onAccuratePositionFound(e) {
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self._currentGPSLocation.setData({latlng: e.latlng, accuracy: e.accuracy});
}
function onAccuratePositionError(e) {
console.log("onerror", e.message);
}
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const map = this._leafletMap.data;
map.on('accuratepositionprogress', onAccuratePositionProgress);
map.on('accuratepositionfound', onAccuratePositionFound);
map.on('accuratepositionerror', onAccuratePositionError);
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this._currentGPSLocation.addCallback((location) => {
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const color = getComputedStyle(document.body).getPropertyValue("--catch-detail-color")
const icon = L.icon(
{
iconUrl: Img.AsData(Svg.crosshair.replace(/#000000/g, color)),
iconSize: [40, 40], // size of the icon
iconAnchor: [20, 20], // point of the icon which will correspond to marker's location
})
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const newMarker = L.marker(location.latlng, {icon: icon});
newMarker.addTo(map);
if (self._marker !== undefined) {
map.removeLayer(self._marker);
}
self._marker = newMarker;
});
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navigator?.permissions?.query({name: 'geolocation'})
?.then(function (status) {
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console.log("Geolocation is already", status)
if (status.state === "granted") {
self.StartGeolocating();
}
self._permission.setData(status.state);
status.onchange = function () {
self._permission.setData(status.state);
}
});
this.HideOnEmpty(true);
}
InnerRender(): string {
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if (!this._featureSwitch.data) {
return "";
}
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if (this._hasLocation.data) {
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return Svg.crosshair_blue_img;
}
if (this._isActive.data) {
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return Svg.crosshair_blue_center_img;
}
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return Svg.crosshair_img;
}
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InnerUpdate(htmlElement: HTMLElement) {
super.InnerUpdate(htmlElement);
const self = this;
htmlElement.onclick = function () {
self.StartGeolocating(19);
}
htmlElement.oncontextmenu = function (e) {
self.StartGeolocating(15);
e.preventDefault();
return false;
}
}
private StartGeolocating(zoomlevel = 19) {
const self = this;
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const map : any = this._leafletMap.data;
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if (self._permission.data === "denied") {
return "";
}
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if (this._currentGPSLocation.data !== undefined) {
this._leafletMap.data.setView(
this._currentGPSLocation.data.latlng, zoomlevel
);
}
console.log("Searching location using GPS")
map.findAccuratePosition({
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maxWait: 10000, // defaults to 10000
desiredAccuracy: 50 // defaults to 20
});
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if (!self._isActive.data) {
self._isActive.setData(true);
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Utils.DoEvery(60000, () => {
if (document.visibilityState !== "visible") {
console.log("Not starting gps: document not visible")
return;
}
map.findAccuratePosition({
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maxWait: 10000, // defaults to 10000
desiredAccuracy: 50 // defaults to 20
});
})
}
}
}