openwebrx-clone/htdocs/map.js
2019-07-06 15:04:39 +02:00

104 lines
3.3 KiB
JavaScript

(function(){
var protocol = 'ws';
if (window.location.toString().startsWith('https://')) {
protocol = 'wss';
}
var query = window.location.search.replace(/^\?/, '').split('&').map(function(v){
var s = v.split('=');
r = {}
r[s[0]] = s.slice(1).join('=')
return r;
}).reduce(function(a, b){
return a.assign(b);
});
var expectedCallsign;
if (query.callsign) expectedCallsign = query.callsign;
var ws_url = protocol + "://" + (window.location.origin.split("://")[1]) + "/ws/";
if (!("WebSocket" in window)) return;
var ws = new WebSocket(ws_url);
ws.onopen = function(){
ws.send("SERVER DE CLIENT client=map.js type=map");
};
var map;
var markers = {};
var updateQueue = [];
var processUpdates = function(updates) {
if (!map) {
updateQueue = updateQueue.concat(updates);
return;
}
updates.forEach(function(update){
// TODO maidenhead locator implementation
if (update.location.type != 'latlon') return;
var pos = new google.maps.LatLng(update.location.lat, update.location.lon)
if (markers[update.callsign]) {
markers[update.callsign].setPosition(pos);
} else {
markers[update.callsign] = new google.maps.Marker({
position: pos,
map: map,
title: update.callsign
});
}
// TODO the trim should happen on the server side
if (expectedCallsign && expectedCallsign == update.callsign.trim()) {
map.panTo(pos);
delete(expectedCallsign);
}
});
}
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 {
json = JSON.parse(e.data);
switch (json.type) {
case "config":
var config = json.value;
$.getScript("https://maps.googleapis.com/maps/api/js?key=" + config.google_maps_api_key).done(function(){
map = new google.maps.Map($('body')[0], {
center: {
lat: config.receiver_gps[0],
lng: config.receiver_gps[1]
},
zoom: 8
});
processUpdates(updateQueue);
})
break
case "update":
processUpdates(json.value);
break
}
} catch (e) {
// don't lose exception
console.error(e);
}
};
ws.onclose = function(){
console.info("onclose");
};
window.onbeforeunload = function() { //http://stackoverflow.com/questions/4812686/closing-websocket-correctly-html5-javascript
ws.onclose = function () {};
ws.close();
};
ws.onerror = function(){
console.info("onerror");
};
})();