openwebrx-clone/htdocs/map.js

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