forked from FOSS/BangleApps
98 lines
3.2 KiB
JavaScript
98 lines
3.2 KiB
JavaScript
const storage = require("Storage");
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const DateUtils = require("solar_date_utils.js");
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class LocationManager {
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constructor(locations) {
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this.idx=0;
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this.locations = locations;
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this.listeners = [];
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this.in_use = true;
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this.gps_queried = false;
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this.gpsPower = 0;
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this.location_info = null;
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}
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init(){
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try {
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this.location_info = storage.readJSON("solar_loc." + this.getName() + ".json");
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} catch(e){
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console.log("failed to load location:" + this.getName())
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}
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if(this.location_info == null){
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this.location_info = {};
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}
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if (this.isGPSLocation() && !this.gps_queried) {
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//console.log("gps location:" + JSON.stringify(this.location_info));
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var last_update_str = this.location_info.last_update;
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if(last_update_str == null ||
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(Date.now() - new Date(last_update_str).getTime() > DateUtils.DAY_MILLIS ) ){
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console.log("updating local location last update:" + last_update_str);
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this._gpsUpdate();
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this.gps_queried = true;
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} else {
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console.log("gps update not required last update:" + last_update_str);
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}
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}
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}
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setGPSPower(power){
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this.gpsPower = power;
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Bangle.setGPSPower(this.gpsPower);
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}
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getGPSPower(){return this.gpsPower;}
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_gpsUpdate(){
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this.setGPSPower(1);
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Bangle.on('GPS', (g) => {
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if (!this.in_use)
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return;
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if (g.fix) {
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var loc_info = {
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last_update: new Date(),
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coordinates: [g.lon, g.lat]
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};
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console.log("Received gps fixing:" + JSON.stringify(loc_info));
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storage.writeJSON("solar_loc.local.json", loc_info);
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this.setGPSPower(0);
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if(this.isGPSLocation()){
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this.location_info = loc_info;
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this.notifyUpdate();
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}
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}
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});
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}
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isGPSLocation(){return this.getName() == 'local';}
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addUpdateListener(listener){this.listeners.push(listener);}
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nextLocation() {
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if(this.locations.length > 1) {
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this.idx += 1;
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this.idx = this.idx % this.locations.length;
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console.log("location now:" + this.getName());
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this.init();
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this.notifyUpdate();
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} else {
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console.log("no extra locations found");
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}
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}
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notifyUpdate(){
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for(var i=0; i<this.listeners.length; i++){
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this.listeners[i](this);
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}
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}
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getUTCOffset(){return this.location_info.utc_offset;}
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getName(){return this.locations[this.idx];}
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getCoordinates(){return this.location_info.coordinates;}
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shutdown(){
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this.in_use=false;
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this.setGPSPower(0);
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}
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}
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const LOCATIONS_FILE = "solar_locations.json";
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const LocationUtils = {
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load_locations : ()=>{
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var locations = storage.readJSON(LOCATIONS_FILE);
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console.log("loaded locations:" + locations);
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var mgr = new LocationManager(locations);
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mgr.init();
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return mgr;
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}
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}
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module.exports = LocationUtils; |