280 lines
10 KiB
JavaScript
280 lines
10 KiB
JavaScript
(function(){
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var protocol = 'ws';
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if (window.location.toString().startsWith('https://')) {
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protocol = 'wss';
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}
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var query = window.location.search.replace(/^\?/, '').split('&').map(function(v){
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var s = v.split('=');
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var r = {};
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r[s[0]] = s.slice(1).join('=');
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return r;
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}).reduce(function(a, b){
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return a.assign(b);
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});
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var expectedCallsign;
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if (query.callsign) expectedCallsign = query.callsign;
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var expectedLocator;
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if (query.locator) expectedLocator = query.locator;
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var ws_url = protocol + "://" + (window.location.origin.split("://")[1]) + "/ws/";
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if (!("WebSocket" in window)) return;
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var map;
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var markers = {};
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var rectangles = {};
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var updateQueue = [];
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// reasonable default; will be overriden by server
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var retention_time = 2 * 60 * 60 * 1000;
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var strokeOpacity = 0.8;
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var fillOpacity = 0.35;
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var processUpdates = function(updates) {
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if (!map) {
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updateQueue = updateQueue.concat(updates);
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return;
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}
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updates.forEach(function(update){
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switch (update.location.type) {
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case 'latlon':
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var pos = new google.maps.LatLng(update.location.lat, update.location.lon);
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var marker;
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if (markers[update.callsign]) {
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marker = markers[update.callsign];
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} else {
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marker = new google.maps.Marker();
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marker.addListener('click', function(){
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showMarkerInfoWindow(update.callsign, pos);
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});
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markers[update.callsign] = marker;
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}
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marker.setOptions($.extend({
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position: pos,
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map: map,
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title: update.callsign
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}, getMarkerOpacityOptions(update.lastseen) ));
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marker.lastseen = update.lastseen;
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marker.mode = update.mode;
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marker.band = update.band;
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// TODO the trim should happen on the server side
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if (expectedCallsign && expectedCallsign == update.callsign.trim()) {
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map.panTo(pos);
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showMarkerInfoWindow(update.callsign, pos);
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delete(expectedCallsign);
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}
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break;
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case 'locator':
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var loc = update.location.locator;
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var lat = (loc.charCodeAt(1) - 65 - 9) * 10 + Number(loc[3]);
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var lon = (loc.charCodeAt(0) - 65 - 9) * 20 + Number(loc[2]) * 2;
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var center = new google.maps.LatLng({lat: lat + .5, lng: lon + 1});
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var rectangle;
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if (rectangles[update.callsign]) {
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rectangle = rectangles[update.callsign];
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} else {
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rectangle = new google.maps.Rectangle();
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rectangle.addListener('click', function(){
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showLocatorInfoWindow(update.location.locator, center);
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});
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rectangles[update.callsign] = rectangle;
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}
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rectangle.setOptions($.extend({
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strokeColor: '#FF0000',
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strokeWeight: 2,
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fillColor: '#FF0000',
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map: map,
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bounds:{
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north: lat,
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south: lat + 1,
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west: lon,
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east: lon + 2
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}
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}, getRectangleOpacityOptions(update.lastseen) ));
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rectangle.lastseen = update.lastseen;
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rectangle.locator = update.location.locator;
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rectangle.mode = update.mode;
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rectangle.band = update.band;
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if (expectedLocator && expectedLocator == update.location.locator) {
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map.panTo(center);
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showLocatorInfoWindow(expectedLocator, center);
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delete(expectedLocator);
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}
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break;
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}
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});
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};
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var clearMap = function(){
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var reset = function(callsign, item) { item.setMap(); };
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$.each(markers, reset);
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$.each(rectangles, reset);
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markers = {};
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rectangles = {};
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};
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var reconnect_timeout = false;
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var connect = function(){
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var ws = new WebSocket(ws_url);
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ws.onopen = function(){
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ws.send("SERVER DE CLIENT client=map.js type=map");
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reconnect_timeout = false
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};
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ws.onmessage = function(e){
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if (typeof e.data != 'string') {
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console.error("unsupported binary data on websocket; ignoring");
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return
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}
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if (e.data.substr(0, 16) == "CLIENT DE SERVER") {
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console.log("Server acknowledged WebSocket connection.");
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return
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}
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try {
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var json = JSON.parse(e.data);
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switch (json.type) {
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case "config":
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var config = json.value;
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if (!map) $.getScript("https://maps.googleapis.com/maps/api/js?key=" + config.google_maps_api_key).done(function(){
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map = new google.maps.Map($('.openwebrx-map')[0], {
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center: {
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lat: config.receiver_gps[0],
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lng: config.receiver_gps[1]
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},
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zoom: 5
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});
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processUpdates(updateQueue);
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updateQueue = [];
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$.getScript("/static/lib/nite-overlay.js").done(function(){
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nite.init(map);
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setInterval(function() { nite.refresh() }, 10000); // every 10s
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});
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});
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retention_time = config.map_position_retention_time * 1000;
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break;
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case "update":
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processUpdates(json.value);
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break;
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}
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} catch (e) {
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// don't lose exception
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console.error(e);
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}
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};
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ws.onclose = function(){
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clearMap();
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if (reconnect_timeout) {
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// max value: roundabout 8 and a half minutes
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reconnect_timeout = Math.min(reconnect_timeout * 2, 512000);
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} else {
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// initial value: 1s
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reconnect_timeout = 1000;
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}
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setTimeout(connect, reconnect_timeout);
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};
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window.onbeforeunload = function() { //http://stackoverflow.com/questions/4812686/closing-websocket-correctly-html5-javascript
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ws.onclose = function () {};
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ws.close();
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};
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/*
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ws.onerror = function(){
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console.info("websocket error");
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};
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*/
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};
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connect();
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var infowindow;
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var showLocatorInfoWindow = function(locator, pos) {
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if (!infowindow) infowindow = new google.maps.InfoWindow();
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var inLocator = $.map(rectangles, function(r, callsign) {
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return {callsign: callsign, locator: r.locator, lastseen: r.lastseen, mode: r.mode, band: r.band}
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}).filter(function(d) {
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return d.locator == locator;
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}).sort(function(a, b){
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return b.lastseen - a.lastseen;
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});
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infowindow.setContent(
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'<h3>Locator: ' + locator + '</h3>' +
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'<div>Active Callsigns:</div>' +
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'<ul>' +
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inLocator.map(function(i){
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var timestring = moment(i.lastseen).fromNow();
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var message = i.callsign + ' (' + timestring + ' using ' + i.mode;
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if (i.band) message += ' on ' + i.band;
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message += ')';
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return '<li>' + message + '</li>'
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}).join("") +
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'</ul>'
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);
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infowindow.setPosition(pos);
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infowindow.open(map);
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};
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var showMarkerInfoWindow = function(callsign, pos) {
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if (!infowindow) infowindow = new google.maps.InfoWindow();
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var marker = markers[callsign];
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var timestring = moment(marker.lastseen).fromNow();
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infowindow.setContent(
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'<h3>' + callsign + '</h3>' +
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'<div>' + timestring + ' using ' + marker.mode + '</div>'
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);
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infowindow.open(map, marker);
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}
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var getScale = function(lastseen) {
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var age = new Date().getTime() - lastseen;
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var scale = 1;
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if (age >= retention_time / 2) {
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scale = (retention_time - age) / (retention_time / 2);
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}
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return Math.max(0, Math.min(1, scale));
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};
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var getRectangleOpacityOptions = function(lastseen) {
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var scale = getScale(lastseen);
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return {
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strokeOpacity: strokeOpacity * scale,
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fillOpacity: fillOpacity * scale
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};
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};
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var getMarkerOpacityOptions = function(lastseen) {
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var scale = getScale(lastseen);
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return {
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opacity: scale
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};
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};
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// fade out / remove positions after time
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setInterval(function(){
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var now = new Date().getTime();
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$.each(rectangles, function(callsign, m) {
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var age = now - m.lastseen;
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if (age > retention_time) {
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delete rectangles[callsign];
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m.setMap();
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return;
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}
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m.setOptions(getRectangleOpacityOptions(m.lastseen));
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});
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$.each(markers, function(callsign, m) {
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var age = now - m.lastseen;
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if (age > retention_time) {
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delete markers[callsign];
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m.setMap();
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return;
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}
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m.setOptions(getMarkerOpacityOptions(m.lastseen));
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});
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}, 1000);
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})(); |