/* eslint-disable no-undef */

var startpos = [51.05, -1.38];  // Start location - somewhere in UK :-)
var startzoom = 10;

var ws;
var map;
var allData = {};
var markers = {};
var polygons = {};
var layers = {};
var overlays = {};
var basemaps = {};
var marks = [];
var buttons = {};
var marksIndex = 0;
var menuOpen = false;
var clusterAt = 0;
var maxage = 900;   // default max age of icons on map in seconds - cleared after 10 mins
var baselayername = "OSM grey";     // Default base layer OSM but uniform grey
var pagefoot = " © DCJ 2022"
var inIframe = false;
var showUserMenu = true;
var showLayerMenu = true;
var showMouseCoords = false;
var allowFileDrop = false;
var heat;
var minimap;
var sidebyside;
var layercontrol;
var drawControl;
var drawingColour = "#910000";
var sendDrawing;
var colorControl;
var sendRoute;
var oldBounds = {ne:{lat:0,lng:0},sw:{lat:0,lng:0}};

var iconSz = {
    "Team/Crew": 24,
    "Squad": 24,
    "Section": 24,
    "Platoon/detachment": 26,
    "Company/battery/troop": 28,
    "Battalion/squadron": 30,
    "Regiment/group": 32,
    "Brigade": 34,
    "Division": 36,
    "Corps/MEF": 36,
    "Army": 40,
    "Army Group/front": 40,
    "Region/Theater": 44,
    "Command": 44
};

// Create the socket
var connect = function() {
    // var transports = ["websocket", "xhr-streaming", "xhr-polling"],
    ws = new SockJS(location.pathname.split("index")[0] + 'socket');
    ws.onopen = function() {
        console.log("CONNECTED");
        if (!inIframe) {
            document.getElementById("footer").innerHTML = "<font color='#494'>"+pagefoot+"</font>";
        }
        ws.send(JSON.stringify({action:"connected",parameters:Object.fromEntries((new URL(location)).searchParams)}));
        onoffline();
    };
    ws.onclose = function() {
        console.log("DISCONNECTED");
        if (!inIframe) {
            document.getElementById("footer").innerHTML = "<font color='#900'>"+pagefoot+"</font>";
        }
        setTimeout(function() { connect(); }, 2500);
    };
    ws.onmessage = function(e) {
        try {
            var data = JSON.parse(e.data);
            if (data.hasOwnProperty("type") && data.hasOwnProperty("data") && data.type === "Buffer") { data = data.data.toString(); }
            handleData(data);
        }
        catch (e) { if (data) { console.log("BAD DATA",data); } }
        // console.log("DATA",typeof data,data);
    };
}
console.log("CONNECT TO",location.pathname + 'socket');

var handleData = function(data) {
    if (Array.isArray(data)) {
        //console.log("ARRAY");
        // map.closePopup();
        // var bnds= L.latLngBounds([0,0]);
        for (var prop in data) {
            if (data[prop].command) { doCommand(data[prop].command); delete data[prop].command; }
            if (data[prop].hasOwnProperty("name")) {
                setMarker(data[prop]);
                // bnds.extend(markers[data[prop].name].getLatLng());
            }
            else if (data[prop].hasOwnProperty("filename") && data[prop].filename === "doc.kml") {
                data = {command:{map:{overlay:"KML", kml:data[prop].payload}}};
                doCommand(data.command); return;
            }
            else { console.log("SKIP A",data[prop]); }
        }
        // map.fitBounds(bnds.pad(0.25));
    }
    else {
        if (typeof data === "string" && data.indexOf("<?xml") == 0) {
            if (data.indexOf("<nvg") != -1) {
                data = {command:{map:{overlay:"NVG", nvg:data}}};
            }
            else if (data.indexOf("<kml") != -1) {
                data = {command:{map:{overlay:"KML", kml:data}}};
            }
            else if (data.indexOf("<gpx") != -1) {
                data = {command:{map:{overlay:"GPX", gpx:data}}};
            }
        }
        if (data.command) { doCommand(data.command); delete data.command; }
        if (data.hasOwnProperty("type") && data.type.indexOf("Feature") === 0) {
            if (data.hasOwnProperty('properties') && data.properties.hasOwnProperty('title')) {
                doGeojson(data.properties.title,data)
            }
            else { doGeojson("geojson",data); }
        }
        else if (data.hasOwnProperty("name")) { setMarker(data); }
        else {
            if (JSON.stringify(data) !== '{}') {
                console.log("SKIP",data);
            }
            // if (typeof data === "string") { doDialog(data); }
            // else { console.log("SKIP",data); }
        }
    }
}

window.onunload = function() { if (ws) ws.close(); }

var onoffline = function() { if (!navigator.onLine) { map.addLayer(layers["_countries"]); } }

document.addEventListener ("keydown", function (ev) {
    // Set Ctl-Alt-3 to switch to 3d view
    if (ev.ctrlKey && ev.altKey && ev.code === "Digit3") {
        ws.close();
        window.location.href = "index3d.html";
    }
    // Set Esc key to close all open popups
    if (ev.keyCode === 27) {
        map.eachLayer(function (layer) {
            layer.closePopup();
        });
    }
});

if ( window.self !== window.top ) { inIframe = true; }
if (inIframe === true) {
    if ( window.localStorage.hasOwnProperty("lastpos") ) {
        var sp = JSON.parse(window.localStorage.getItem("lastpos"));
        startpos = [ sp.lat, sp.lng ];
    }
    if ( window.localStorage.hasOwnProperty("lastzoom") ) {
        startzoom = window.localStorage.getItem("lastzoom");
    }
}
// if ( window.localStorage.hasOwnProperty("clusterat") ) {
//     clusterAt = window.localStorage.getItem("clusterat");
//     document.getElementById("setclus").value = clusterAt;
// }
// if ( window.localStorage.hasOwnProperty("maxage") ) {
//     maxage = window.localStorage.getItem("maxage");
//     document.getElementById("maxage").value = maxage;
// }

// Create the Initial Map object.
map = new L.map('map',{zoomSnap: 0.1}).setView(startpos, startzoom);
map.whenReady(function() {
    connect();
});

var droplatlng;
var target = document.getElementById("map")
target.ondragover = function (ev) {
    ev.preventDefault()
    ev.dataTransfer.dropEffect = "move"
}

target.ondrop = function (ev) {
    if (allowFileDrop === true) {
        ev.preventDefault();
        droplatlng = map.mouseEventToLatLng(ev);
        handleFiles(ev.dataTransfer.files);
    }
}

var handleFiles = function(files) {
    ([...files]).forEach(readFile);
}

var readFile = function(file) {
    // Check if the file is text or kml
    if (file.type &&
        file.type.indexOf('text') === -1 &&
        file.type.indexOf('kml') === -1 &&
        file.type.indexOf('kmz') === -1 &&
        file.type.indexOf('json') === -1 &&
        file.type.indexOf('image/jpeg') === -1 &&
        file.type.indexOf('image/png') === -1 &&
        file.type.indexOf('image/tiff') === -1) {
        console.log('File is not text, kml, kmz, jpeg, png, or json', file.type, file);
        return;
    }

    const reader = new FileReader();
    reader.addEventListener('load', (event) => {
        var content = event.target.result;
        var data;
        if (content.indexOf("base64") !== -1) {
            if (content.indexOf("image") === -1) {
                data = atob(content.split("base64,")[1]);
                if (data.indexOf('<?xml') !== -1) {
                    if (data.indexOf("<gpx") !== -1) {
                        doCommand({map:{overlay:file.name, gpx:data}});
                    }
                    else if (data.indexOf("<kml") !== -1) {
                        doCommand({map:{overlay:file.name, kml:data}});
                    }
                    else if (data.indexOf("<nvg") !== -1) {
                        doCommand({map:{overlay:file.name, nvg:data}});
                    }
                }
                else if (data.indexOf('PK') === 0) {
                    console.log("ZIP FILE");
                }
                else {
                    try {
                        data = JSON.parse(data);
                        handleData(data);
                    }
                    catch(e) {
                        console.log("NOT JSON DATA",data);
                    }
                }
            }
            else if (content.indexOf("image/tiff") !== -1) {
                data = atob(content.split("base64,")[1]);
                console.log("Geotiff",typeof data)
                /// we now have a geotiff image to render...
            }
            ws.send(JSON.stringify({action:"file", name:file.name, type:file.type, content:content, lat:droplatlng.lat, lon:droplatlng.lng}));
        }
        else {
            console.log("NOT SURE WHAT THIS IS?",content)
        }
    });
    reader.readAsDataURL(file);
}

// Create some buttons
var menuButton = L.easyButton({states:[{icon:'fa-bars fa-lg', onClick:function() { toggleMenu(); }, title:'Toggle menu'}], position:"topright"});
var fullscreenButton = L.control.fullscreen();
var rulerButton = L.control.ruler({position:"topleft"});

var followMode = { accuracy:true };
var followState = false;
var trackMeButton;
var errRing;

function onLocationFound(e) {
    if (followState === true) { map.panTo(e.latlng); }
    if (followMode.icon) {
        var self = {name:followMode.name || "self", lat:e.latlng.lat, lon:e.latlng.lng, hdg:e.heading, speed:(e.speed*3.6 ?? undefined), layer:followMode.layer, icon:followMode.icon, iconColor:followMode.iconColor ?? "#910000" };
        setMarker(self);
    }
    if (followMode.accuracy) {
        errRing = L.circle(e.latlng, e.accuracy, {color:followMode.color ?? "cyan", weight:3, opacity:0.6, fill:false, clickable:false});
        errRing.addTo(map);
        // if (e.hasOwnProperty("heading")) {
        //     var lengthAsDegrees = e.speed * 60 / 110540;
        //     var ya = e.latlng.lat + Math.sin((90-e.heading)/180*Math.PI)*lengthAsDegrees*Math.cos(e.latlng.lng/180*Math.PI);
        //     var xa = e.latlng.lng + Math.cos((90-e.heading)/180*Math.PI)*lengthAsDegrees;
        //     var lla = new L.LatLng(ya,xa);
        //     L.polygon([ e.latlng, lla ], {color:"cyan", weight:3, opacity:0.5, clickable:false}).addTo(map);
        // }
    }
    ws.send(JSON.stringify({action:"point", lat:e.latlng.lat.toFixed(5), lon:e.latlng.lng.toFixed(5), point:"self", hdg:e.heading, speed:(e.speed*3.6 ?? undefined)}));
}

function onLocationError(e) { console.log(e.message); }

// Move some bits around if in an iframe
if (inIframe) {
    console.log("IN an iframe");
    if (showUserMenu) { menuButton.addTo(map); }
    document.getElementById("topbar").style.display="none";
    document.getElementById("map").style.top="0px";
    document.getElementById("results").style.right="50px";
    document.getElementById("results").style.top="10px";
    document.getElementById("results").style.zIndex="1";
    document.getElementById("results").style.height="31px";
    document.getElementById("results").style.paddingTop="6px";
    document.getElementById("bars").style.display="none";
    document.getElementById("menu").style.right="8px";
    document.getElementById("menu").style.borderRadius="6px";
}
else {
    console.log("NOT in an iframe");
    if (!showUserMenu) { document.getElementById("bars").style.display="none"; }

    // Add the fullscreen button
    fullscreenButton.addTo(map);

    trackMeButton = L.easyButton({
        states: [{
            stateName: 'track-on',
            icon:      'fa-window-close-o fa-lg',
            title:     'Disable tracking',
            onClick: function(btn, map) {
                btn.state('track-off');
                followState = false;
                if (errRing) { errRing.removeFrom(map); }
                delMarker(followMode.name || "self")
                map.stopLocate();
            }
        }, {
            stateName: 'track-off',
            icon:      'fa-crosshairs fa-lg',
            title:     'Enable tracking',
            onClick: function(btn, map) {
                btn.state('track-on');
                followState = true;
                map.locate({setView:false, watch:followState, enableHighAccuracy:true});
            }
        }]
    });
    trackMeButton.state('track-off');
    trackMeButton.addTo(map);

    // Add the locate my position button
    // L.easyButton( 'fa-crosshairs fa-lg', function() {
    //     map.locate({setView:true, maxZoom:16});
    // }, "Locate me").addTo(map);

     // Create the clear heatmap button
    var clrHeat = L.easyButton( 'fa-eraser', function() {
        console.log("Reset heatmap");
        heat.setLatLngs([]);
    }, "Clears the current heatmap", {position:"bottomright"});
}

var helpMenu = '<table>'
helpMenu += '<tr><td><input type="text" name="search" id="search" size="20" style="width:150px;"/>&nbsp;<span onclick=\'doSearch();\'><i class="fa fa-search fa-lg"></i></span></td></tr>';
helpMenu += '<tr><td style="cursor:default"><i class="fa fa-spinner fa-lg fa-fw"></i> Set Max Age <input type="text" name="maxage" id="maxage" value="600" size="5" onchange=\'setMaxAge();\'/>s</td></tr>';
helpMenu += '<tr><td style="cursor:default"><i class="fa fa-search-plus fa-lg fa-fw"></i> Cluster at zoom &lt;<input type="text" name="setclus" id="setclus" size="2" onchange=\'setCluster(this.value);\'/></td></tr>';
helpMenu += '<tr><td style="cursor:default"><input type="checkbox" id="panit" onclick=\'doPanit(this.checked);\'/> Auto Pan Map</td></tr>';
helpMenu += '<tr><td style="cursor:default"><input type="checkbox" id="lockit" onclick=\'doLock(this.checked);\'/> Lock Map</td></tr>';
helpMenu += '<tr><td style="cursor:default"><input type="checkbox" id="heatall" onclick=\'doHeatAll(this.checked);\'/> Heatmap all layers</td></tr>';
if (!inIframe) { helpMenu += '<tr><td style="cursor:default"><span id="showHelp" onclick=\'doDialog(helpText);\'><i class="fa fa-info fa-lg fa-fw"></i>Help</span></td></tr></table>'; }
else { helpMenu += '</table>' }
document.getElementById('menu').innerHTML = helpMenu;

// Add graticule
var showGrid = false;
var showRuler = false;
var Lgrid = L.latlngGraticule({
    font: "Verdana",
    fontColor: "#666",
    zoomInterval: [
        {start:1, end:2, interval:40},
        {start:3, end:3, interval:20},
        {start:4, end:4, interval:10},
        {start:5, end:7, interval:5},
        {start:8, end:20, interval:1}
    ]
});

var panit = false;
function doPanit(v) {
    if (v !== undefined) { panit = v; }
    console.log("Panit set :",panit);
}

var heatAll = false;
function doHeatAll(v) {
    if (v !== undefined) { heatall = v; }
    console.log("Heatall set :",heatAll);
}

var lockit = false;
var mb = new L.LatLngBounds([[-120,-360],[120,360]]);
function doLock(v) {
    if (v !== undefined) { lockit = v; }
    if (lockit === false) {
        mb = new L.LatLngBounds([[-120,-360],[120,360]]);
        map.dragging.enable();
    }
    else {
        mb = map.getBounds();
        map.dragging.disable();
        window.localStorage.setItem("lastpos",JSON.stringify(map.getCenter()));
        window.localStorage.setItem("lastzoom", map.getZoom());
        window.localStorage.setItem("lastlayer", baselayername);
        //window.localStorage.setItem("clusterat", clusterAt);
        window.localStorage.setItem("maxage", maxage);
        console.log("Saved :",JSON.stringify(map.getCenter()),map.getZoom(),baselayername);
    }
    map.setMaxBounds(mb);
    //console.log("Map bounds lock :",lockit);
}

// Remove old markers
function doTidyUp(l) {
    if (l === "heatmap") {
        heat.setLatLngs([]);
    }
    else {
        var d = parseInt(Date.now()/1000);
        for (var m in markers) {
            if ((l && (l == markers[m].lay)) || typeof markers[m].ts != "undefined") {
                if ((l && (l == markers[m].lay)) || (markers[m].hasOwnProperty("ts") && (Number(markers[m].ts) < d) && (markers[m].lay !== "_drawing"))) {
                    //console.log("STALE :",m);
                    if (typeof polygons[m+"_"] != "undefined") {
                        layers[polygons[m+"_"].lay].removeLayer(polygons[m+"_"]);
                        delete polygons[m+"_"];
                    }
                    if (typeof polygons[m] != "undefined") {
                        layers[markers[m].lay].removeLayer(polygons[m]);
                        delete polygons[m];
                    }
                    layers[markers[m].lay].removeLayer(markers[m]);
                    delete markers[m];
                }
            }
        }
        if (l) {
            if (layers[l]) { map.removeLayer(layers[l]); layercontrol.removeLayer(layers[l]); delete layers[l]; }
            if (overlays[l]) { map.removeLayer(overlays[l]); layercontrol.removeLayer(overlays[l]); delete overlays[l]; }
        }
    }
}

// Call tidyup every {maxage} seconds - default 10 mins
var stale = null;
function setMaxAge() {
    maxage = document.getElementById('maxage').value;
    if (stale) { clearInterval(stale); }
    //if (maxage > 0) {
    stale = setInterval( function() { doTidyUp() }, 20000); // check every 20 secs
}
setMaxAge();

// move the daylight / nighttime boundary (if enabled) every minute
function moveTerminator() { // if terminator line plotted move it every minute
    if (layers["_daynight"] && layers["_daynight"].getLayers().length > 0) {
        layers["_daynight"].clearLayers();
        layers["_daynight"].addLayer(L.terminator());
    }
}
setInterval( function() { moveTerminator() }, 60000 );

// move the rainfall overlay (if enabled) every 10 minutes
function moveRainfall() {
    if (navigator.onLine && map.hasLayer(overlays["rainfall"])) {
        overlays["rainfall"]["_url"] = 'https://tilecache.rainviewer.com/v2/radar/' + parseInt(Date.now()/600000)*600 + '/256/{z}/{x}/{y}/2/1_1.png';
        overlays["rainfall"].redraw();
    }
}
setInterval( function() { moveRainfall() }, 600000 );

function setCluster(v) {
    clusterAt = v || 0;
    console.log("clusterAt set:",clusterAt);
    showMapCurrentZoom();
}

// Search for markers with names of ... or icons of ...
function doSearch() {
    var value = document.getElementById('search').value;
    marks = [];
    marksIndex = 0;
    for (var key in markers) {
        if ( (~(key.toLowerCase()).indexOf(value.toLowerCase())) && (mb.contains(markers[key].getLatLng()))) {
            marks.push(markers[key]);
        }
        if (markers[key].icon === value) {
            marks.push(markers[key]);
        }
    }
    moveToMarks();
    if (marks.length === 0) {
        // If no markers found let's try a geolookup...
        var protocol = location.protocol;
        if (protocol == "file:") { protocol = "https:"; }
        var searchUrl = protocol + "//nominatim.openstreetmap.org/search?format=json&limit=1&q=";

        fetch(searchUrl + value) // Call the fetch function passing the url of the API as a parameter
            .then(function(resp) { return resp.json(); })
            .then(function(data) {
                if (data.length > 0) {
                    var bb = data[0].boundingbox;
                    map.fitBounds([ [bb[0],bb[2]], [bb[1],bb[3]] ]);
                    map.panTo([data[0].lat, data[0].lon]);
                }
                else {
                    document.getElementById('searchResult').innerHTML = "&nbsp;<font color='#ff0'>Not Found</font>";
                }
            })
            .catch(function(err) {
                if (err.toString() === "TypeError: Failed to fetch") {
                    document.getElementById('searchResult').innerHTML = "&nbsp;<font color='#ff0'>Not Found</font>";
                }
            });
    }
    else {
        if (lockit) {
            document.getElementById('searchResult').innerHTML = "&nbsp;<font color='#ff0'>Found "+marks.length+" results within bounds.</font>";
        } else {
            document.getElementById('searchResult').innerHTML = "&nbsp;<font color='#ff0'>Found "+marks.length+" results.</font>";
        }
    }
}

// Jump to a markers position - centralise it on map
function moveToMarks() {
    if (marks.length > marksIndex) {
        var m = marks[marksIndex];
        map.setView(m.getLatLng(), map.getZoom());
        m.openPopup();
        marksIndex++;
        setTimeout(moveToMarks, 2500);
    }
}

// Clear Search With Marker names
function clearSearch() {
    var value = document.getElementById('search').value;
    marks = [];
    marksIndex = 0;
    for (var key in markers) {
        if ( (~(key.toLowerCase()).indexOf(value.toLowerCase())) && (mb.contains(markers[key].getLatLng()))) {
            marks.push(markers[key]);
        }
    }
    removeMarks();
    if (lockit) {
        document.getElementById('searchResult').innerHTML = "";
    }
    else {
        document.getElementById('searchResult').innerHTML = "";
    }
}

function removeMarks() {
    if (marks.length > marksIndex) {
        var m = marks[marksIndex];
        map.setView(m.getLatLng(), map.getZoom());
        m.closePopup();
        marksIndex++;
    }
}

function toggleMenu() {
    menuOpen = !menuOpen;
    if (menuOpen) {
        document.getElementById("menu").style.display = 'block';
    } else {
        document.getElementById("menu").style.display = 'none';
        dialogue.close();
    }
}

function openMenu() {
    if (!menuOpen) {
        menuOpen = true;
        document.getElementById("menu").style.display = 'block';
    }
}

function closeMenu() {
    if (menuOpen) {
        menuOpen = false;
        document.getElementById("menu").style.display = 'none';
    }
    dialogue.close();
}

document.getElementById("menu").style.display = 'none';

map.on('overlayadd', function(e) {
    if (typeof overlays[e.name].bringToFront === "function") {
        overlays[e.name].bringToFront();
    }
    if (e.name == "satellite") {
        overlays["satellite"].bringToBack();
    }
    if (e.name == "countries") {
        overlays["countries"].bringToBack();
    }
    if (e.name == "heatmap") { // show heatmap button when it's layer is added.
        clrHeat.addTo(map);
    }
    if (e.name == "day/night") {
        layers["_daynight"].addLayer(L.terminator());
    }
    if (e.name == "drawing") {
        overlays["drawing"].bringToFront();
        map.addControl(colorControl);
        map.addControl(drawControl);
    }
    ws.send(JSON.stringify({action:"addlayer", name:e.name}));
});

map.on('overlayremove', function(e) {
    if (e.name == "heatmap") { // hide heatmap button when it's layer is removed.
        clrHeat.removeFrom(map);
    }
    if (e.name == "day/night") {
        layers["_daynight"].clearLayers();
    }
    if (e.name == "drawing") {
        map.removeControl(drawControl);
        map.removeControl(colorControl);
    }
    ws.send(JSON.stringify({action:"dellayer", name:e.name}));
});

map.on('baselayerchange', function(e) {
    //console.log("base layer now :",e.name);
    baselayername = e.name;
    ws.send(JSON.stringify({action:"layer", name:e.name}));
});

function showMapCurrentZoom() {
    //console.log("ZOOM:",map.getZoom());
    for (var l in layers) {
        if (layers[l].hasOwnProperty("_zoom")) {
            if (map.getZoom() >= clusterAt) {
                layers[l].disableClustering();
            }
            else {
                layers[l].enableClustering();
            }
        }
    }
    setTimeout( function() {
        for (var key in markers) {
            if (polygons[key]) {
                if (typeof layers[markers[key].lay].getVisibleParent === 'function') {
                    var vis = layers[markers[key].lay].getVisibleParent(markers[key]);
                    if ((vis) && (vis.hasOwnProperty("lay"))) {
                        polygons[key].setStyle({opacity:1});
                    }
                    else {
                        polygons[key].setStyle({opacity:0});
                    }
                }
                try {
                    if (polygons[key].hasOwnProperty("_layers")) {
                        polygons[key].eachLayer(function(layer) { layer.redraw(); });
                    }
                    else {
                        polygons[key].redraw();
                    }
                } catch(e) {
                    console.log(key,polygons[key],e)
                }
            }
        }
    },750);
}

map.on('zoomend', function() {
    showMapCurrentZoom();
    window.localStorage.setItem("lastzoom", map.getZoom());
    var b = map.getBounds();
    oldBounds = {sw:{lat:b._southWest.lat,lng:b._southWest.lng},ne:{lat:b._northEast.lat,lng:b._northEast.lng}};
    ws.send(JSON.stringify({action:"bounds", south:b._southWest.lat, west:b._southWest.lng, north:b._northEast.lat, east:b._northEast.lng, zoom:map.getZoom() }));
});
map.on('moveend', function() {
    window.localStorage.setItem("lastpos",JSON.stringify(map.getCenter()));
    var b = map.getBounds();
    if (b._southWest.lat !== oldBounds.sw.lat && b._southWest.lng !== oldBounds.sw.lng && b._northEast.lat !== oldBounds.ne.lat && b._northEast.lng !== oldBounds.ne.lng) {
        ws.send(JSON.stringify({action:"bounds", south:b._southWest.lat, west:b._southWest.lng, north:b._northEast.lat, east:b._northEast.lng, zoom:map.getZoom() }));
        oldBounds = {sw:{lat:b._southWest.lat,lng:b._southWest.lng},ne:{lat:b._northEast.lat,lng:b._northEast.lng}};
    }
});
map.on('locationfound', onLocationFound);
map.on('locationerror', onLocationError);

//map.on('contextmenu', function(e) {
//    ws.send(JSON.stringify({action:"rightclick", lat:e.latlng.lat.toFixed(5), lon:e.latlng.lng.toFixed(5)}));
//});

// single right click to add a marker
var addmenu = "<b>Add marker</b><br><input type='text' id='rinput' autofocus onkeydown='if (event.keyCode == 13) addThing();' placeholder='name (,icon/SIDC, layer, colour, heading)'/>";
if (navigator.onLine) { addmenu += '<br/><a href="https://spatialillusions.com/unitgenerator/" target="_new">MilSymbol SIDC generator</a>'; }
var rightmenuMap = L.popup({keepInView:true, minWidth:260}).setContent(addmenu);

var rclk = {};
var hiderightclick = false;
var addThing = function() {
    var thing = document.getElementById('rinput').value;
    map.closePopup();
    //popped = false;
    var bits = thing.split(",");
    var icon = (bits[1] || "circle").trim();
    var lay = (bits[2] || "_drawing").trim();
    var colo = (bits[3] ?? "#910000").trim();
    var hdg = parseFloat(bits[4] || 0);
    var drag = true;
    var regi = /^[S,G,E,I,O][A-Z]{3}.*/i;  // if it looks like a SIDC code
    var d = {action:"point", name:bits[0].trim(), layer:lay, draggable:drag, lat:rclk.lat, lon:rclk.lng, hdg:hdg, ttl:0 };
    if (regi.test(icon)) {
        d.SIDC = (icon.toUpperCase()+"------------").substr(0,12);
    }
    else {
        d.icon = icon;
        d.iconColor = colo;
    }
    ws.send(JSON.stringify(d));
    delete d.action;
    setMarker(d);
    map.addLayer(layers[lay]);
}

var feedback = function(n,v,a,c) {
    if (v === "$form") { v = form; }
    if (markers[n]) {
        //var fp = markers[n]._latlng;
        // ws.send(JSON.stringify({action:a||"feedback", name:n, value:v, layer:markers[n].lay, lat:fp.lat, lon:fp.lng}));
        var fb = allData[n];
        fb.action = a || "feedback";
        if (v !== undefined) { fb.value = v; }
        ws.send(JSON.stringify(fb));
    }
    else {
        if (n === undefined) { n = "map"; }
        ws.send(JSON.stringify({action:a||"feedback", name:n, value:v, lat:rclk.lat, lon:rclk.lng}));
    }
    if (c === true) { map.closePopup(); }
}

var form = {};
var addToForm = function(n,v) {
    form[n] = v;
}

// allow double right click to zoom out (if enabled)
// single right click opens a message window that adds a marker
var rclicked = false;
var rtout = null;

map.on('contextmenu', function(e) {
    if (rclicked) {
        rclicked = false;
        clearTimeout(rtout);
        if (map.doubleClickZoom.enabled()) {
            map.zoomOut();
        }
    }
    else {
        rclicked = true;
        rtout = setTimeout( function() {
            rclicked = false;
            if ((hiderightclick !== true) && (addmenu.length > 0)) {
                rclk = e.latlng;
                form = {};
                rightmenuMap.setLatLng(e.latlng);
                map.openPopup(rightmenuMap);
                setTimeout( function() {
                    try { document.getElementById('rinput').focus(); }
                    catch(e) {}
                }, 200);
            }
        }, 300);
    }
});


// Layer control based on select box rather than radio buttons.
//var layercontrol = L.control.selectLayers(basemaps, overlays).addTo(map);
layercontrol = L.control.layers(basemaps, overlays);

// Add all the base layer maps if we are online.
var addBaseMaps = function(maplist,first) {
    // console.log("MAPS",first,maplist)
    var layerlookup = { OSMG:"OSM grey", OSMC:"OSM", OSMH:"OSM Humanitarian", EsriC:"Esri", EsriS:"Esri Satellite",
        EsriR:"Esri Relief", EsriT:"Esri Topography", EsriO:"Esri Ocean", EsriDG:"Esri Dark Grey", NatGeo: "National Geographic",
        UKOS:"UK OS OpenData", OpTop:"Open Topo Map",
        HB:"Hike Bike OSM", ST:"Stamen Topography", SW:"Stamen Watercolor", AN:"AutoNavi (Chinese)"
    }

    if (navigator.onLine) {
        // Use this for OSM online maps
        var osmUrl='https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
        var osmAttrib='Map data © OpenStreetMap contributors';

        if (maplist.indexOf("MB3d")!==-1) { // handle the case of 3d by redirecting to that page instead.
            window.location.href("index3d.html");
        }
        if (maplist.indexOf("OSMG")!==-1) {
            basemaps[layerlookup["OSMG"]] = new L.TileLayer.Grayscale(osmUrl, {
                attribution:osmAttrib,
                maxNativeZoom:19,
                maxZoom:20,
                subdomains: ['a','b','c']
            });
        }
        if (maplist.indexOf("OSMC")!==-1) {
            basemaps[layerlookup["OSMC"]] = new L.TileLayer(osmUrl, {
                attribution:osmAttrib,
                maxNativeZoom:19,
                maxZoom:20,
                subdomains: ['a','b','c']
            });
        }
        if (maplist.indexOf("OSMH")!==-1) {
            basemaps[layerlookup["OSMH"]] = new L.TileLayer("https://{s}.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png", {
                attribution:"Map data © OpenStreetMap Contributors. Courtesy of Humanitarian OpenStreetMap Team",
                maxNativeZoom:19,
                maxZoom:20,
                subdomains: ['a','b']
            });
        }

        // Extra Leaflet map layers from https://leaflet-extras.github.io/leaflet-providers/preview/
        if (maplist.indexOf("EsriC")!==-1) {
            basemaps[layerlookup["EsriC"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}', {
                attribution:'Tiles &copy; Esri',
                maxNativeZoom:19,
                maxZoom:20
            });
        }

        if (maplist.indexOf("EsriS")!==-1) {
            basemaps[layerlookup["EsriS"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}', {
            //var Esri_WorldImagery = L.tileLayer('http://clarity.maptiles.arcgis.com/arcgis/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}', {{
                attribution:'Tiles &copy; Esri',
                maxNativeZoom:17, maxZoom:20
            });
        }

        if (maplist.indexOf("EsriT")!==-1) {
            basemaps[layerlookup["EsriT"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/{z}/{y}/{x}', {
                attribution:'Tiles &copy; Esri &mdash; Esri, DeLorme, NAVTEQ, TomTom, Intermap, iPC, USGS, FAO, NPS, NRCAN, GeoBase, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), and the GIS User Community'
            });
        }

        if (maplist.indexOf("EsriR")!==-1) {
            basemaps[layerlookup["EsriR"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/World_Shaded_Relief/MapServer/tile/{z}/{y}/{x}', {
                attribution:'Tiles &copy; Esri',
                maxNativeZoom:13,
                maxZoom:16
            });
        }

        if (maplist.indexOf("EsriO")!==-1) {
            basemaps[layerlookup["EsriO"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/Ocean_Basemap/MapServer/tile/{z}/{y}/{x}', {
                attribution:'Tiles &copy; Esri &mdash; Sources: GEBCO, NOAA, CHS, OSU, UNH, CSUMB, National Geographic, DeLorme, NAVTEQ, and Esri',
                maxNativeZoom:10,
                maxZoom:13
            });
        }

        if (maplist.indexOf("EsriDG")!==-1) {
            basemaps[layerlookup["EsriDG"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Dark_Gray_Base/MapServer/tile/{z}/{y}/{x}', {
                attribution: 'Tiles &copy; Esri &mdash; Esri, DeLorme, NAVTEQ',
                maxNativeZoom:16,
                maxZoom:18
            });
        }

        if (maplist.indexOf("NatGeo")!==-1) {
            basemaps[layerlookup["NatGeo"]] = L.tileLayer('https://server.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer/tile/{z}/{y}/{x}', {
                attribution: 'Tiles &copy; Esri',
                maxNativeZoom:12
            });
        }

        if (maplist.indexOf("UKOS")!==-1) {
            basemaps[layerlookup["UKOS"]] = L.tileLayer('https://geo.nls.uk/maps/opendata/{z}/{x}/{y}.png', {
                attribution: '<a href="https://geo.nls.uk/maps/">National Library of Scotland Historic Maps</a>',
                bounds: [[49.6, -12], [61.7, 3]],
                minZoom:1, maxNativeZoom:17, maxZoom:20,
                subdomains: '0123'
            });
        }

        if (maplist.indexOf("OpTop")!==-1) {
            basemaps[layerlookup["OpTop"]] = L.tileLayer('https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png', {
                subdomains: 'abc',
                maxZoom: 19,
                attribution: '&copy; <a href="https://www.opentopomap.org/copyright">OpenTopoMap</a> contributors'
            });
        }

        if (maplist.indexOf("HB")!==-1) {
            basemaps[layerlookup["HB"]] = L.tileLayer('https://tiles.wmflabs.org/hikebike/{z}/{x}/{y}.png', {
                maxZoom: 19,
                attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
            });
        }

        if (maplist.indexOf("AN")!==-1) {
            basemaps["AutoNavi"] = L.tileLayer('https://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}', {
                attribution: 'Tiles &copy; 高德地图',
                maxNativeZoom:14,
                maxZoom: 19,
            });
        }

        // Nice terrain based maps by Stamen Design
        if (maplist.indexOf("ST")!==-1) {
            var terrainUrl = "https://stamen-tiles-{s}.a.ssl.fastly.net/terrain/{z}/{x}/{y}.jpg";
            basemaps[layerlookup["ST"]] = L.tileLayer(terrainUrl, {
                subdomains: ['a','b','c','d'],
                minZoom: 0,
                maxZoom: 20,
                type: 'jpg',
                attribution: 'Map tiles by <a href="https://stamen.com">Stamen Design</a>, under <a href="https://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data by <a href="https://openstreetmap.org">OpenStreetMap</a>, under <a href="https://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>'
            });
        }

        // Nice watercolour based maps by Stamen Design
        if (maplist.indexOf("SW")!==-1) {
            var watercolorUrl = "https://stamen-tiles-{s}.a.ssl.fastly.net/watercolor/{z}/{x}/{y}.jpg";
            basemaps[layerlookup["SW"]] = L.tileLayer(watercolorUrl, {
                subdomains: ['a','b','c','d'],
                minZoom: 0,
                maxZoom: 20,
                type: 'jpg',
                attribution: 'Map tiles by <a href="https://stamen.com">Stamen Design</a>, under <a href="https://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data by <a href="https://openstreetmap.org">OpenStreetMap</a>, under <a href="https://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>'
            });
        }
    }

    if (first) {
        if (layerlookup[first]) { baselayername = layerlookup[first]; }
        else { basenayername = first; }
    }
    else {
        basenayername = Object.keys(basemaps)[0];
    }
    basemaps[baselayername].addTo(map);
    if (showLayerMenu) {
        map.removeControl(layercontrol);
        layercontrol = L.control.layers(basemaps, overlays).addTo(map);
    }
}

// Now add the overlays
var addOverlays = function(overlist) {
    //console.log("OVERLAYS",overlist)
    // var overlookup = { DR:"Drawing", CO:"Countries", DN:"Day/Night", BU:"Buildings", SN:"Ship Navigaion", HM:"Heatmap", AC:"Air corridors", TL:"Place labels" };
    // "DR,CO,DN,BU,SN,HM"

    // Add the drawing layer...
    if (overlist.indexOf("DR")!==-1) {
        //var colorPickButton = L.easyButton({states:[{icon:'fa-tint fa-lg', onClick:function() { console.log("PICK"); }, title:'Pick Colour'}]});
        var redButton = L.easyButton('fa-square wm-red', function(btn) { changeDrawColour("#FF4040"); })
        var blueButton = L.easyButton('fa-square wm-blue', function(btn) { changeDrawColour("#4040F0"); })
        var greenButton = L.easyButton('fa-square wm-green', function(btn) { changeDrawColour("#40D040"); })
        var yellowButton = L.easyButton('fa-square wm-yellow', function(btn) { changeDrawColour("#FFFF40"); })
        var cyanButton = L.easyButton('fa-square wm-cyan', function(btn) { changeDrawColour("#40F0F0"); })
        var magentaButton = L.easyButton('fa-square wm-magenta', function(btn) { changeDrawColour("#F040F0"); })
        var blackButton = L.easyButton('fa-square wm-black', function(btn) { changeDrawColour("#000000"); })
        var whiteButton = L.easyButton('fa-square wm-white', function(btn) { changeDrawColour("#EEEEEE"); })
        colorControl = L.easyBar([redButton,blueButton,greenButton,yellowButton,cyanButton,magentaButton,blackButton,whiteButton]);

        layers["_drawing"] = new L.FeatureGroup();
        overlays["drawing"] = layers["_drawing"];
        map.options.drawControlTooltips = false;
        var drawCount = 0;
        drawControl = new L.Control.Draw({
            draw: {
                polyline: { shapeOptions: { clickable:true } },
                marker: false,
                //circle: false,
                circle: { shapeOptions: { clickable:true } },
                circlemarker: false,
                rectangle: { shapeOptions: { clickable:true } },
                polygon: { shapeOptions: { clickable:true } }
            }
            //edit: none
            // {
            //     featureGroup: layers["_drawing"],
            //     remove: true,
            //     edit: true
            // }
        });
        var changeDrawColour = function(col) {
            drawingColour = col;
            // console.log("COLOR",col)
            drawControl.setDrawingOptions({
                polyline: { shapeOptions: { color:drawingColour } },
                circle: { shapeOptions: { color:drawingColour } },
                rectangle: { shapeOptions: { color:drawingColour } },
                polygon: { shapeOptions: { color:drawingColour } }
            });
        }
        var shape;
        map.on('draw:created', function (e) {
            var name = e.layerType + drawCount;
            drawCount = drawCount + 1;

            e.layer.on('contextmenu', function(e) {
                L.DomEvent.stopPropagation(e);
                var rmen = L.popup({offset:[0,-12]}).setLatLng(e.latlng);
                rmen.setContent("<input type='text' autofocus value='"+e.target.name+"' id='dinput' placeholder='name (,icon, layer)'/><br/><button onclick='editPoly(\""+e.target.name+"\",true);'>Edit points</button><button onclick='delMarker(\""+e.target.name+"\",true);'>Delete</button><button onclick='sendDrawing();'>OK</button>");
                map.openPopup(rmen);
            });

            var la, lo, cent;
            if (e.layer.hasOwnProperty("_latlng")) {
                la = e.layer._latlng.lat;
                lo = e.layer._latlng.lng;
                cent = e.layer._latlng;
            }
            else {
                cent = e.layer.getBounds().getCenter();
            }
            var m = {action:"draw", name:name, type:e.layerType, layer:"_drawing", options:e.layer.options, radius:e.layer._mRadius, lat:la, lon:lo};
            if (e.layer.hasOwnProperty("_latlngs")) {
                if (e.layer.options.fill === false) { m.line = e.layer._latlngs; }
                else { m.area = e.layer._latlngs[0]; }
            }

            shape = {m:m, layer:e.layer};
            polygons[name] = shape.layer;
            polygons[name].lay = "_drawing";
            polygons[name].name = name;
            layers["_drawing"].addLayer(shape.layer);

            var rightmenuMarker = L.popup({offset:[0,-12]}).setContent("<input type='text' autofocus value='"+name+"' id='dinput' placeholder='name (,icon, layer)'/><br/><button onclick='editPoly(\""+name+"\",true);'>Edit points</button><button onclick='delMarker(\""+name+"\",true);'>Delete</button><button onclick='sendDrawing(\""+name+"\");'>OK</button>");
            if (e.layer.options.fill === false && navigator.onLine) {
                rightmenuMarker = L.popup({offset:[0,-12]}).setContent("<input type='text' autofocus value='"+name+"' id='dinput' placeholder='name (,icon, layer)'/><br/><button onclick='editPoly(\""+name+"\",true);'>Edit points</button><button onclick='delMarker(\""+name+"\",true);'>Delete</button><button onclick='sendRoute(\""+name+"\");'>Route</button><button onclick='sendDrawing(\""+name+"\");'>OK</button>");
            }
            rightmenuMarker.setLatLng(cent);
            setTimeout(function() {map.openPopup(rightmenuMarker)},25);
        });

        sendDrawing = function(n) {
            var thing = document.getElementById('dinput').value;
            map.closePopup();
            shape.m.name = thing;
            delMarker(n,true);

            polygons[thing] = shape.layer;
            polygons[thing].lay = "_drawing";
            polygons[thing].name = thing;
            layers["_drawing"].addLayer(shape.layer);
            ws.send(JSON.stringify(shape.m));
        }

        var defaultOptions = function () {
            var options = {};
            options.precision =  5;
            options.factor = Math.pow(10, options.precision);
            options.dimension = 2;
            return options;
        };

        var decode = function (encoded, options) {
            options = defaultOptions(options);
            var flatPoints = decodeDeltas(encoded);
            var points = [];
            for (var i = 0, len = flatPoints.length; i + (options.dimension - 1) < len;) {
                var point = [];
                for (var dim = 0; dim < options.dimension; ++dim) {
                    point.push(flatPoints[i++]);
                }
                points.push(point);
            }
            return points;
        }

        var decodeDeltas = function (encoded, options) {
            options = defaultOptions(options);
            var lastNumbers = [];
            var numbers = decodeFloats(encoded, options);
            for (var i = 0, len = numbers.length; i < len;) {
                for (var d = 0; d < options.dimension; ++d, ++i) {
                    numbers[i] = Math.round((lastNumbers[d] = numbers[i] + (lastNumbers[d] || 0)) * options.factor) / options.factor;
                }
            }
            return numbers;
        }

        var decodeFloats = function (encoded, options) {
            options = defaultOptions(options);
            var numbers = decodeSignedIntegers(encoded);
            for (var i = 0, len = numbers.length; i < len; ++i) {
                numbers[i] /= options.factor;
            }
            return numbers;
        }

        var decodeSignedIntegers = function (encoded) {
            var numbers = decodeUnsignedIntegers(encoded);
            for (var i = 0, len = numbers.length; i < len; ++i) {
                var num = numbers[i];
                numbers[i] = (num & 1) ? ~(num >> 1) : (num >> 1);
            }
            return numbers;
        }

        var decodeUnsignedIntegers = function (encoded) {
            var numbers = [];
            var current = 0;
            var shift = 0;
            for (var i = 0, len = encoded.length; i < len; ++i) {
                var b = encoded.charCodeAt(i) - 63;
                current |= (b & 0x1f) << shift;
                if (b < 0x20) {
                    numbers.push(current);
                    current = 0;
                    shift = 0;
                } else {
                    shift += 5;
                }
            }
            return numbers;
        }

        sendRoute = function(n) {
            var p = (polygons[n]._latlngs.map(function(x) {
                return x.lng+","+x.lat;
            })).join(';');

            fetch('https://router.project-osrm.org/route/v1/driving/'+p)
                .then(response => response.json())
                .then(data => {
                    if (data.code !== "Ok") { sendDrawing(n); }
                    var r = decode(data.routes[0].geometry).map( x => L.latLng(x[0],x[1]) );
                    polygons[n]._latlngs = r;
                    shape.m.line = r;
                    // shape.m.type = {label:"routing", distance:data.routes[0].distance, duration:data.routes[0].duration}
                    shape.m.type = "route";
                    shape.m.distance = data.routes[0].distance;
                    shape.m.duration = data.routes[0].duration;
                    sendDrawing(n);
                });
        }

    }

    // Add the countries (world-110m) for offline use
    if (overlist.indexOf("CO") !== -1 || !navigator.onLine) {
        var customTopoLayer = L.geoJson(null, {clickable:false, style: {color:"blue", weight:2, fillColor:"#cf6", fillOpacity:0.04}});
        layers["_countries"] = omnivore.topojson('images/world-50m-flat.json',null,customTopoLayer);
        overlays["countries"] = layers["_countries"];
    }

    // Add the day/night overlay
    if (overlist.indexOf("DN")!==-1) {
        layers["_daynight"] = new L.LayerGroup();
        overlays["day/night"] = layers["_daynight"];
    }

    // Add live rain data
    if (overlist.indexOf("RA")!==-1) {
        if (navigator.onLine) {
            overlays["rainfall"] = new L.TileLayer('https://tilecache.rainviewer.com/v2/radar/' + parseInt(Date.now()/600000)*600 + '/256/{z}/{x}/{y}/2/1_1.png', {
                tileSize: 256,
                opacity: 0.4,
                transparent: true,
                attribution: '<a href="https://rainviewer.com" target="_blank">rainviewer.com</a>'
            });
        }
    }

    // Add the buildings layer
    if (overlist.indexOf("BU")!==-1) {
        overlays["buildings"] = new OSMBuildings(map).load();
        // map.removeLayer(overlays["buildings"]);     // Hide it at start
    }

    // Add Railways
    if (overlist.indexOf("RW")!==-1) {
        // eg https://a.tiles.openrailwaymap.org/standard/11/1015/686.png
        overlays["railways"] = L.tileLayer('https://{s}.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png', {
            maxZoom: 19,
            attribution: 'Map data: &copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> | Map style: &copy; <a href="https://www.OpenRailwayMap.org">OpenRailwayMap</a> (<a href="https://creativecommons.org/licenses/by-sa/3.0/">CC-BY-SA</a>)'
        });
    }

    // Add Air Corridors
    if (overlist.indexOf("AC")!==-1) {
        overlays["air corridors"] = L.tileLayer('https://{s}.tile.maps.openaip.net/geowebcache/service/tms/1.0.0/openaip_basemap@EPSG%3A900913@png/{z}/{x}/{y}.{ext}', {
            attribution: '<a href="https://www.openaip.net/">openAIP Data</a> (<a href="https://creativecommons.org/licenses/by-sa/3.0/">CC-BY-NC-SA</a>)',
            ext: 'png',
            minZoom: 4,
            maxZoom: 15,
            maxNativeZoom: 14,
            tms: true,
            detectRetina: true,
            subdomains: '12'
        });
    }

    // Add the OpenSea markers layer
    if (overlist.indexOf("SN")!==-1) {
        overlays["ship navigation"] = L.tileLayer('https://tiles.openseamap.org/seamark/{z}/{x}/{y}.png', {
            maxZoom: 19,
            attribution: 'Map data: &copy; <a href="https://www.openseamap.org">OpenSeaMap</a> contributors'
        });
    }

    // Add the Stamen Toner Labels layer
    if (overlist.indexOf("TL")!==-1) {
        overlays["place labels"] = L.tileLayer('https://stamen-tiles-{s}.a.ssl.fastly.net/toner-labels/{z}/{x}/{y}{r}.{ext}', {
            attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data &copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
            subdomains: 'abcd',
            minZoom: 0,
            maxZoom: 20,
            ext: 'png'
        });
    }

    // Add the heatmap layer (and add delete LatLng function)
    if (overlist.indexOf("HM")!==-1) {
        heat = L.heatLayer([], {radius:60, gradient:{0.2:'blue', 0.4:'lime', 0.6:'red', 0.8:'yellow', 1:'white'}});
        heat.delLatLng = function(ll) {
            heat._latlngs = heat._latlngs.filter(v => { return v != ll; } );
            heat._redraw();
        }
        layers["_heat"] = new L.LayerGroup().addLayer(heat);
        overlays["heatmap"] = layers["_heat"];
    }

    if (showLayerMenu) {
        map.removeControl(layercontrol);
        layercontrol = L.control.layers(basemaps, overlays).addTo(map);
    }
}

// Add the layers control widget
if (!inIframe) { layercontrol.addTo(map); }
else { showLayerMenu = false;}

var coords = L.control.mouseCoordinate({position:"bottomleft"});

// Add an optional legend
var legend = L.control({ position: "bottomleft" });

// Add the dialog box for messages
var dialogue = L.control.dialog({initOpen:false, size:[600,400], anchor:[50,150]}).addTo(map);
dialogue.freeze();

var doDialog = function(d) {
    //console.log("DIALOGUE",d);
    dialogue.setContent(d);
    dialogue.open();
}

var helpText = '<h3>Node-RED - Map all the things</h3><br/>';
helpText += '<p><i class="fa fa-search fa-lg fa-fw"></i> <b>Search</b> - You may enter a name, or partial name, or icon name of an object to search for.';
helpText += 'The map will then jump to centre on each of the results in turn. If nothing is found locally it will try to';
helpText += 'search for a place name if connected to a network.</p>';
helpText += '<p><i class="fa fa-spinner fa-lg fa-fw"></i> <b>Set Max Age</b> - You can set the time after which points';
helpText += 'that haven\'t been updated get removed.</p>';
helpText += '<p><i class="fa fa-search-plus fa-lg fa-fw"></i> <b>Cluster at zoom</b> - lower numbers mean less clustering. 0 means disable totally.</p>';
helpText += '<p><i class="fa fa-arrows fa-lg fa-fw"></i> <b>Auto Pan</b> - When selected, the map will';
helpText += 'automatically move to centre on each data point as they arrive.</p>';
helpText += '<p><i class="fa fa-lock fa-lg fa-fw"></i> <b>Lock Map</b> - When selected will save the';
helpText += 'currently displayed area and basemap.';
helpText += 'Reloading the map in the current browser will return to the same view.';
helpText += 'This can be used to set your initial start position.';
helpText += 'While active it also restricts the "auto pan" and "search" to within that area.</p>';
helpText += '<p><i class="fa fa-globe fa-lg fa-fw"></i> <b>Heatmap all layers</b> - When selected';
helpText += 'all layers whether hidden or not will contribute to the heatmap.';
helpText += 'The default is that only visible layers add to the heatmap.</p>';

// Delete a marker (and notify websocket)
var delMarker = function(dname,note) {
    if (note) { map.closePopup(); }
    if (typeof polygons[dname] != "undefined") {
        layers[polygons[dname].lay].removeLayer(polygons[dname]);
        delete polygons[dname];
    }
    if (typeof polygons[dname+"_"] != "undefined") {
        layers[polygons[dname+"_"].lay].removeLayer(polygons[dname+"_"]);
        delete polygons[dname+"_"];
    }
    if (typeof markers[dname] != "undefined") {
        if (heat && markers[dname].hasOwnProperty("_latlng")) {
            heat.delLatLng(markers[dname]._latlng);
        }
        layers[markers[dname].lay].removeLayer(markers[dname]);
        map.removeLayer(markers[dname]);
        delete markers[dname];
    }
    delete allData[dname];
    if (note) { ws.send(JSON.stringify({action:"delete", name:dname, deleted:true})); }
}

var editPoly = function(pname) {
    map.closePopup();
    editFeatureGroup = L.featureGroup();
    editToolbar = new L.EditToolbar({ featureGroup:editFeatureGroup });
    editHandler = editToolbar.getModeHandlers()[0].handler;
    editHandler._map = map;
    polygons[pname].on("dblclick", function(e) {
        editHandler.disable();
        editFeatureGroup.removeLayer(polygons[pname]);
        polygons[pname].off("dblclick");
        L.DomEvent.stopPropagation(e);
        var la, lo;
        if (e.target.hasOwnProperty("_latlng")) {
            la = e.target._latlng.lat;
            lo = e.target._latlng.lng;
        }
        var m = {action:"draw", name:pname, layer:polygons[pname].lay, options:e.target.options, radius:e.target._mRadius, lat:la, lon:lo};
        if (e.target.hasOwnProperty("_latlngs")) {
            if (e.target.options.fill === false) { m.line = e.target._latlngs; }
            else { m.area = e.target._latlngs[0]; }
        }
        ws.send(JSON.stringify(m));
    })
    editFeatureGroup.addLayer(polygons[pname]);
    editHandler.enable();
}

var rangerings = function(latlng, options) {
    options = L.extend({
        ranges: [250,500,750,1000],
        pan: 0,
        fov: 60,
        color: '#aaaa00'
    }, options);
    var rings = L.featureGroup();
    if (typeof options.ranges === "number") { options.ranges = [ options.ranges ]; }
    for (var i = 0; i < options.ranges.length; i++) {
        L.semiCircle(latlng, {
            radius: options.ranges[i],
            fill: false,
            color: options.color,
            weight: options.weight ?? 1
        }).setDirection(options.pan, options.fov).addTo(rings);
    }
    return rings;
}

// the MAIN add something to map function
function setMarker(data) {
    var rightmenu = function(m) {
        // customise right click context menu
        var rightcontext = "";
        //if (polygons[data.name] == undefined) {
        rightcontext = "<button id='delbutton' onclick='delMarker(\""+data.name+"\",true);'>Delete</button>";
        //}
        if (data.editable) {
            rightcontext = "<button onclick='editPoly(\""+data.name+"\",true);'>Edit</button><button onclick='delMarker(\""+data.name+"\",true);'>Delete</button>";
        }
        if ((data.contextmenu !== undefined) && (typeof data.contextmenu === "string")) {
            rightcontext = data.contextmenu.replace(/\$name/g,'"'+data.name+'"');
            delete data.contextmenu;
        }
        if (rightcontext.length > 0) {
            var rightmenuMarker = L.popup({offset:[0,-12]}).setContent("<b>"+data.name+"</b><br/>"+rightcontext);
            if (hiderightclick !== true) {
                m.on('contextmenu', function(e) {
                    L.DomEvent.stopPropagation(e);
                    rightmenuMarker.setLatLng(e.latlng);
                    map.openPopup(rightmenuMarker);
                });
            }
        }
        else {
            if (hiderightclick !== true) {
                m.on('contextmenu', function(e) {
                    L.DomEvent.stopPropagation(e);
                });
            }
        }
        return m;
    }

    // console.log("DATA", typeof data, data);
    if (data.deleted == true) { // remove markers we are told to
        delMarker(data.name);
        return;
    }

    var ll;
    var lli = null;
    var opt = {};
    opt.color = data.color ?? data.lineColor ?? "#910000";
    opt.fillColor = data.fillColor ?? "#910000";
    opt.stroke = (data.hasOwnProperty("stroke")) ? data.stroke : true;
    opt.weight = data.weight;
    opt.opacity = data.opacity;
    opt.fillOpacity = data.fillOpacity;
    opt.clickable = (data.hasOwnProperty("clickable")) ? data.clickable : false;
    opt.fill = (data.hasOwnProperty("fill")) ? data.fill : true;
    if (data.hasOwnProperty("dashArray")) { opt.dashArray = data.dashArray; }
    if (opt.fillOpacity === undefined) { opt.fillOpacity = 0.2; }
    if (opt.opacity === undefined) { opt.opacity = 1; }
    if (opt.weight === undefined) { opt.weight = 2; }

    // Replace building
    if (data.hasOwnProperty("building")) {
        if ((data.building === "") && layers.hasOwnProperty("buildings")) {
            map.removeLayer(layers["buildings"]);
            layercontrol._update();
            layers["buildings"] = overlays["buildings"].set("");
            return;
        }
        //layers["buildings"] = new OSMBuildings(map).set(data.building);
        layers["buildings"] = overlays["buildings"].set(data.building);
        map.addLayer(layers["buildings"]);
        return;
    }

    var lll = "unknown";
    if (markers.hasOwnProperty(data.name) && markers[data.name].hasOwnProperty("lay")) {
        lll = markers[data.name].lay;
    }
    var lay = data.layer ?? lll;
    if (!data.hasOwnProperty("action") || data.action.indexOf("layer") === -1) {
        if (typeof layers[lay] == "undefined") {  // add layer if if doesn't exist
            if (clusterAt > 0) {
                layers[lay] = new L.MarkerClusterGroup({
                    maxClusterRadius:50,
                    spiderfyDistanceMultiplier:1.8,
                    disableClusteringAtZoom:clusterAt
                    //zoomToBoundsOnClick:false
                });
            }
            else {
                layers[lay] = new L.LayerGroup();
            }
            overlays[lay] = layers[lay];
            if (showLayerMenu !== false) {
                layercontrol.addOverlay(layers[lay],lay);
            }
            map.addLayer(overlays[lay]);
            //console.log("ADDED LAYER",lay,layers);
        }
        if (!allData.hasOwnProperty(data.name)) { allData[data.name] = {}; }
        delete data.action;
        Object.keys(data).forEach(function(key) {
            if (data[key] == null) { delete allData[data.name][key]; }
            else { allData[data.name][key] = data[key]; }
        });
        data = Object.assign({},allData[data.name]);
    }
    delete data.action;

    if (typeof markers[data.name] != "undefined") {
        if (markers[data.name].lay !== lay) {
            delMarker(data.name);
        }
        else {
            try {layers[lay].removeLayer(markers[data.name]); }
            catch(e) { console.log("OOPS"); }
        }
    }

    if (typeof polygons[data.name] != "undefined") { layers[lay].removeLayer(polygons[data.name]); }

    if (data.hasOwnProperty("line") && Array.isArray(data.line)) {
        delete opt.fill;
        if (!data.hasOwnProperty("weight")) { opt.weight = 3; }    //Standard settings different for lines
        if (!data.hasOwnProperty("opacity")) { opt.opacity = 0.8; }
        var polyln = L.polyline(data.line, opt);
        polygons[data.name] = rightmenu(polyln);
        if (data.hasOwnProperty("fit") && data.fit === true) {
            map.fitBounds(polygons[data.name].getBounds(),{padding:[50,50]})
        }
    }
    else if (data.hasOwnProperty("area") && Array.isArray(data.area)) {
        var polyarea;
        if (data.area.length === 2) { polyarea = L.rectangle(data.area, opt); }
        else { polyarea = L.polygon(data.area, opt); }
        polygons[data.name] = rightmenu(polyarea);
        if (data.hasOwnProperty("fit") && data.fit === true) {
            map.fitBounds(polygons[data.name].getBounds(),{padding:[50,50]})
        }
    }
    if (data.hasOwnProperty("greatcircle") && Array.isArray(data.greatcircle) && data.greatcircle.length === 2) {
        delete opt.fill;
        opt.vertices = opt.vertices || 20;
        if (!data.hasOwnProperty("weight")) { opt.weight = 3; }    //Standard settings different for lines
        if (!data.hasOwnProperty("opacity")) { opt.opacity = 0.8; }
        var greatc = L.Polyline.Arc(data.greatcircle[0], data.greatcircle[1], opt);
        var aml = new L.Wrapped.Polyline(greatc._latlngs, opt);

        polygons[data.name] = rightmenu(aml);
        if (data.hasOwnProperty("fit") && data.fit === true) {
            map.fitBounds(polygons[data.name].getBounds(),{padding:[50,50]})
        }
    }
    else if (data.hasOwnProperty("sdlat") && data.hasOwnProperty("sdlon")) {
        if (!data.hasOwnProperty("iconColor")) { opt.color = "blue"; }     //different standard Color Settings
        if (!data.hasOwnProperty("fillColor")) { opt.fillColor = "blue"; }
        var ellipse = L.ellipse(new L.LatLng((data.lat*1), (data.lon*1)), [200000*data.sdlon*Math.cos(data.lat*Math.PI/180), 200000*data.sdlat], 0, opt);
        polygons[data.name] = rightmenu(ellipse);
    }
    else if (data.hasOwnProperty("radius")) {
        if (data.hasOwnProperty("lat") && data.hasOwnProperty("lon")) {
            var polycirc;
            if (Array.isArray(data.radius)) {
                //polycirc = L.ellipse(new L.LatLng((data.lat*1), (data.lon*1)), [data.radius[0]*Math.cos(data.lat*Math.PI/180), data.radius[1]], data.tilt || 0, opt);
                polycirc = L.ellipse(new L.LatLng((data.lat*1), (data.lon*1)), [data.radius[0], data.radius[1]], data.tilt || 0, opt);
            }
            else {
                polycirc = L.circle(new L.LatLng((data.lat*1), (data.lon*1)), data.radius*1, opt);
            }
            polygons[data.name] = rightmenu(polycirc);
            if (!data.hasOwnProperty("icon")) {
                delete (data.lat);
                delete (data.lon);
            }
        }
    }
    else if (data.hasOwnProperty("arc")) {
        if (data.hasOwnProperty("lat") && data.hasOwnProperty("lon")) {
            polygons[data.name] = rangerings(new L.LatLng((data.lat*1), (data.lon*1)), data.arc);
        }
    }
    else if (data.hasOwnProperty("geojson")) {
        doGeojson(data.name,data.geojson,(data.layer || "unknown"),opt);
    }

    if (polygons[data.name] !== undefined) {
        polygons[data.name].lay = lay;
        if (opt.clickable === true) {
            var words = "<b>"+data.name+"</b>";
            if (data.popup) { words = words + "<br/>" + data.popup; }
            polygons[data.name].bindPopup(words, {autoClose:false, closeButton:true, closeOnClick:false, minWidth:200});
        }
        //polygons[data.name] = rightmenu(polygons[data.name]); // DCJ Investigate
        layers[lay].addLayer(polygons[data.name]);
    }

    if (typeof data.coordinates == "object") { ll = new L.LatLng(data.coordinates[1],data.coordinates[0]); }
    else if (data.hasOwnProperty("position") && data.position.hasOwnProperty("lat") && data.position.hasOwnProperty("lon")) {
        data.lat = data.position.lat*1;
        data.lon = data.position.lon*1;
        data.alt = data.position.alt;
        if (parseFloat(data.position.alt) == data.position.alt) { data.alt = data.position.alt + " m"; }
        delete data.position;
        ll = new L.LatLng((data.lat*1), (data.lon*1));
    }
    else if (data.hasOwnProperty("lat") && data.hasOwnProperty("lon")) { ll = new L.LatLng((data.lat*1), (data.lon*1)); }
    else if (data.hasOwnProperty("latitude") && data.hasOwnProperty("longitude")) { ll = new L.LatLng((data.latitude*1), (data.longitude*1)); }
    else {
        // console.log("No location:",data);
        return;
    }

    if (ll.lat === 0 && ll.lng === 0) {
        // Add a little wobble so we can zoom into each if required.
        console.log(data.name,"is at null island.");
        ll.lat = Math.round(1000000 * ll.lat + Math.random() * 10000 - 5000) / 1000000;
        ll.lng = Math.round(1000000 * ll.lng + Math.random() * 10000 - 5000) / 1000000;
    }

    // Adding new L.LatLng object (lli) when optional intensity value is defined. Only for use in heatmap layer
    if (typeof data.coordinates == "object") { lli = new L.LatLng(data.coordinates[2],data.coordinates[1],data.coordinates[0]); }
    else if (data.hasOwnProperty("lat") && data.hasOwnProperty("lon") && data.hasOwnProperty("intensity")) { lli = new L.LatLng((data.lat*1), (data.lon*1), (data.intensity*1)); }
    else if (data.hasOwnProperty("latitude") && data.hasOwnProperty("longitude") && data.hasOwnProperty("intensity")) { lli = new L.LatLng((data.latitude*1), (data.longitude*1), (data.intensity*1)); }
    else { lli = ll }

    // Create the icons... handle plane, car, ship, wind, earthquake as specials
    var marker, myMarker;
    var icon, q;
    var words = "";
    var labelOffset = [12,0];
    var drag = false;

    if (data.draggable === true) { drag = true; }

    if (data.hasOwnProperty("icon")) {
        var dir = parseFloat(data.hdg ?? data.heading ?? data.bearing ?? "0");
        if (data.icon === "ship") {
            marker = L.boatMarker(ll, {
                title: data.name,
                color: (data.iconColor ?? "blue")
            });
            marker.setHeading(dir);
            q = 'https://www.bing.com/images/search?q='+data.icon+'%20%2B"'+encodeURIComponent(data.name)+'"';
            words += '<a href=\''+q+'\' target="_thingpic">Pictures</a><br>';
        }
        else if (data.icon === "plane") {
            data.iconColor = data.iconColor || "black";
            if (data.hasOwnProperty("squawk")) {
                if (data.squawk == 7500 || data.squawk == 7600 || data.squawk == 7700) {
                    data.iconColor = "red";
                }
            }
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="310px" height="310px" viewBox="0 0 310 310">';
            icon += '<path d="M134.875,19.74c0.04-22.771,34.363-22.771,34.34,0.642v95.563L303,196.354v35.306l-133.144-43.821v71.424l30.813,24.072v27.923l-47.501-14.764l-47.501,14.764v-27.923l30.491-24.072v-71.424L3,231.66v-35.306l131.875-80.409V19.74z" fill="'+data.iconColor+'"/></svg>';
            var svgplane = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"planeicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgplane+'" style="width:32px; height:32px; -webkit-transform:rotate('+dir+'deg); -moz-transform:rotate('+dir+'deg);"/>'
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "smallplane") {
            data.iconColor = data.iconColor ?? "black";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" version="1.0" width="20" height="20">';
            icon += '<path d="M15.388 4.781c.068.068.061.154-.171.656-.028.06-.18.277-.18.277s.102.113.13.14c.054.055.078.175.056.27-.068.295-.89 1.47-1.35 1.93-.285.286-.432.481-.422.56.009.068.117.356.24.64.219.5.3.599 2.762 3.339 1.95 2.169 2.546 2.87 2.582 3.028.098.439-.282.847-1.264 1.356l-.507.263-7.389-5.29-4.43 3.365.102.18c.056.099.519.676 1.029 1.283.51.607.933 1.161.94 1.232.026.284-1.111 1.177-1.282 1.006-.27-.27-1.399-1.131-1.494-1.14-.068-.007-1.04-.747-1.37-1.077-.329-.33-1.07-1.301-1.076-1.37-.01-.094-.871-1.224-1.14-1.493-.171-.171.722-1.308 1.006-1.282.07.007.625.43 1.231.94.607.51 1.185.973 1.283 1.029l.18.101 3.365-4.43-5.29-7.388.263-.507c.51-.982.918-1.362 1.357-1.264.158.035.859.632 3.028 2.581 2.74 2.462 2.838 2.544 3.339 2.762.284.124.572.232.639.24.08.01.274-.136.56-.422.46-.46 1.635-1.282 1.93-1.35.095-.022.216.003.27.057.028.028.139.129.139.129s.217-.153.277-.18c.502-.233.59-.238.657-.17z" fill="'+data.iconColor+'"/></svg>';
            var svgplane = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"planeicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgplane+'" style="width:32px; height:32px; -webkit-transform:rotate('+(dir - 45)+'deg); -moz-transform:rotate('+(dir - 45)+'deg);"/>'
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "bus") {
            dir = dir - 90;
            var sc = 1;
            if (dir < -90 || dir >= 90) { sc = -1; }
            data.iconColor = data.iconColor ?? "#910000";
            var p = "m595.5 97.332-30.898-68.199c-11.141-24.223-35.344-39.762-62.004-39.801h-443.3c-32.738 0.035157-59.266 26.562-59.301 59.305v148.2c0 17.949 14.551 32.5 32.5 32.5h48.5c4.7344 23.309 25.219 40.051 49 40.051s44.266-16.742 49-40.051h242c4.7344 23.309 25.219 40.051 49 40.051s44.266-16.742 49-40.051h53.203c12.348-0.003906 23.219-8.1484 26.699-20 0.72266-2.5391 1.0898-5.1602 1.0977-7.7969v-83.5c-0.003906-7.1445-1.5391-14.203-4.5-20.703zm-545.5 12c-5.5234 0-10-4.4766-10-10v-80c0-5.5195 4.4766-10 10-10h70c5.5234 0 10 4.4805 10 10v80c0 5.5234-4.4766 10-10 10zm80 140c-16.566 0-30-13.43-30-30 0-16.566 13.434-30 30-30s30 13.434 30 30c-0.046875 16.551-13.453 29.953-30 30zm110-150c0 5.5234-4.4766 10-10 10h-70c-5.5234 0-10-4.4766-10-10v-80c0-5.5195 4.4766-10 10-10h70c5.5234 0 10 4.4805 10 10zm110 0c0 5.5234-4.4766 10-10 10h-70c-5.5234 0-10-4.4766-10-10v-80c0-5.5195 4.4766-10 10-10h70c5.5234 0 10 4.4805 10 10zm30 10c-5.5234 0-10-4.4766-10-10v-80c0-5.5195 4.4766-10 10-10h70c5.5234 0 10 4.4805 10 10v80c0 5.5234-4.4766 10-10 10zm90 140c-16.566 0-30-13.43-30-30 0-16.566 13.434-30 30-30s30 13.434 30 30c-0.046875 16.551-13.453 29.953-30 30zm19.199-140c-5.1836-0.46094-9.168-4.793-9.1992-10v-80.086c0-5.4727 4.4375-9.9141 9.9141-9.9141h12.684c18.824 0.050781 35.914 11.012 43.805 28.102l30.898 68.199c1.6133 3.5547 2.5 7.3984 2.6016 11.297z";
            icon = '<svg width="640pt" height="640pt" viewBox="-20 -180 640 640" xmlns="http://www.w3.org/2000/svg">';
            icon += '<path d="'+p+'" fill="'+data.iconColor+'"/></svg>';
            var svgbus = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"busicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgbus+'" style="width:32px; height:32px; -webkit-transform:scaleY('+sc+') rotate('+dir*sc+'deg); -moz-transform:scaleY('+sc+') rotate('+dir*sc+'deg);"/>'
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "helicopter") {
            data.iconColor = data.iconColor ?? "black";
            if (data.hasOwnProperty("squawk")) {
                if (data.squawk == 7500 || data.squawk == 7600 || data.squawk == 7700) {
                    data.iconColor = "red";
                }
            }
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="314" height="314" viewBox="0 0 314.5 314.5">';
            icon += '<path d="M268.8 3c-3.1-3.1-8.3-2.9-11.7 0.5L204.9 55.7C198.5 23.3 180.8 0 159.9 0c-21.9 0-40.3 25.5-45.7 60.2L57.4 3.5c-3.4-3.4-8.6-3.6-11.7-0.5 -3.1 3.1-2.9 8.4 0.5 11.7l66.3 66.3c0 0.2 0 0.4 0 0.6 0 20.9 4.6 39.9 12.1 54.4l-78.4 78.4c-3.4 3.4-3.6 8.6-0.5 11.7 3.1 3.1 8.3 2.9 11.7-0.5l76.1-76.1c3.2 3.7 6.7 6.7 10.4 8.9v105.8l-47.7 32.2v18l50.2-22.3h26.9l50.2 22.3v-18L175.8 264.2v-105.8c2.7-1.7 5.4-3.8 7.8-6.2l73.4 73.4c3.4 3.4 8.6 3.6 11.7 0.5 3.1-3.1 2.9-8.3-0.5-11.7l-74.9-74.9c8.6-14.8 14-35.2 14-57.8 0-1.9-0.1-3.8-0.2-5.8l61.2-61.2C271.7 11.3 271.9 6.1 268.8 3z" fill="'+data.iconColor+'"/></svg>';
            var svgheli = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"heliicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgheli+'" style="width:32px; height:32px; -webkit-transform:rotate('+dir+'deg); -moz-transform:rotate('+dir+'deg);"/>'
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "uav") {
            data.iconColor = data.iconColor || "black";
            if (data.hasOwnProperty("squawk")) {
                if (data.squawk == 7500 || data.squawk == 7600 || data.squawk == 7700) {
                    data.iconColor = "red";
                }
            }
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 100 100">';
            icon+= '<path d="M62 82h-8V64h36c0-5-4-9-9-9H54v-8c0-3 4-5 4-11.1 0-4.4-3.6-8-8-8-4.4 0-8 3.6-8 8 0 5.1 4 8.1 4 11.1V55h-27c-5 0-9 4-9 9h36v18H38c-2.4 0-5 2.3-5 5L50 92l17-5C67 84.3 64.4 82 62 82z" fill="'+data.iconColor+'"/></svg>';
            var svguav = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"uavicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svguav+'" style="width:32px; height:32px; -webkit-transform:rotate('+dir+'deg); -moz-transform:rotate('+dir+'deg);"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "car") {
            data.iconColor = data.iconColor || "black";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="47px" height="47px" viewBox="0 0 47 47">';
            icon += '<path d="M29.395,0H17.636c-3.117,0-5.643,3.467-5.643,6.584v34.804c0,3.116,2.526,5.644,5.643,5.644h11.759   c3.116,0,5.644-2.527,5.644-5.644V6.584C35.037,3.467,32.511,0,29.395,0z M34.05,14.188v11.665l-2.729,0.351v-4.806L34.05,14.188z    M32.618,10.773c-1.016,3.9-2.219,8.51-2.219,8.51H16.631l-2.222-8.51C14.41,10.773,23.293,7.755,32.618,10.773z M15.741,21.713   v4.492l-2.73-0.349V14.502L15.741,21.713z M13.011,37.938V27.579l2.73,0.343v8.196L13.011,37.938z M14.568,40.882l2.218-3.336 h13.771l2.219,3.336H14.568z M31.321,35.805v-7.872l2.729-0.355v10.048L31.321,35.805z" fill="'+data.iconColor+'"/></svg>';
            var svgcar = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"caricon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgcar+'" style="width:32px; height:32px; -webkit-transform:rotate('+dir+'deg); -moz-transform:rotate('+dir+'deg);"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "arrow") {
            data.iconColor = data.iconColor || "black";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="32px" height="32px" viewBox="0 0 32 32">';
            icon += '<path d="m16.2 0.6l-10.9 31 10.7-11.1 10.5 11.1 -10.3-31z" fill="'+data.iconColor+'"/></svg>';
            var svgarrow = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"arrowicon",
                iconAnchor: [16, 16],
                html:"'<img src='"+svgarrow+"' style='width:32px; height:32px; -webkit-transform:translate(0px,-16px) rotate("+dir+"deg); -moz-transform:translate(0px,-16px) rotate("+dir+"deg);'/>",
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "wind") {
            data.iconColor = data.iconColor || "black";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="32px" height="32px" viewBox="0 0 32 32">';
            icon += '<path d="M16.7 31.7l7-6.9c0.4-0.4 0.4-1 0-1.4 -0.4-0.4-1-0.4-1.4 0l-5.3 5.2V17.3l6.7-6.6c0.2-0.2 0.3-0.5 0.3-0.7v-9c0-0.9-1.1-1.3-1.7-0.7l-6.3 6.2L9.7 0.3C9.1-0.3 8 0.1 8 1.1v8.8c0 0.3 0.1 0.6 0.3 0.8l6.7 6.6v11.3l-5.3-5.2c-0.4-0.4-1-0.4-1.4 0 -0.4 0.4-0.4 1 0 1.4l7 6.9c0.2 0.2 0.5 0.3 0.7 0.3C16.2 32 16.5 31.9 16.7 31.7zM10 9.6V3.4l5 4.9v6.2L10 9.6zM17 8.3l5-4.9v6.2l-5 4.9V8.3z" fill="'+data.iconColor+'"/></svg>';
            var svgwind = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"windicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgwind+'" style="width:32px; height:32px; -webkit-transform:rotate('+dir+'deg); -moz-transform:rotate('+dir+'deg);"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "satellite") {
            data.iconColor = data.iconColor || "black";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 100 100">';
            icon += '<polygon points="38.17 39.4 45.24 32.33 43.34 27.92 24.21 8.78 14.59 18.4 33.72 37.53" fill="'+data.iconColor+'"/>';
            icon += '<path d="M69.22 44.57L54.38 29.73c-1.1-1.1-2.91-1.1-4.01 0L35.53 44.57c-1.1 1.1-1.1 2.91 0 4.01l14.84 14.84c1.1 1.1 2.91 1.1 4.01 0l14.84-14.84C70.32 47.47 70.32 45.67 69.22 44.57z" fill="'+data.iconColor+'"/>';
            icon += '<polygon points="71.04 55.61 66.58 53.75 59.52 60.82 61.42 65.23 80.55 84.36 90.17 74.75" fill="'+data.iconColor+'"/>';
            icon += '<path d="M28.08 55.26l-6.05 0.59C23.11 68.13 32.78 77.94 45 79.22l0.59-6.05C36.26 72.15 28.89 64.66 28.08 55.26z" fill="'+data.iconColor+'"/>';
            icon += '<path d="M15.88 56.54L9.83 57.13c1.67 18.06 16.03 32.43 34.08 34.09l0.59-6.04C29.34 83.76 17.29 71.71 15.88 56.54z" fill="'+data.iconColor+'"/>';
            icon += '</svg>';
            var svgsat = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"satelliteicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svgsat+'" style="width:32px; height:32px;"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if ((data.icon === "iss") || (data.icon === "ISS")) {
            data.iconColor = data.iconColor || "black";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 48 48">';
            icon += '<path id="iss" d="m4.55 30.97l6.85-12.68 0.59 0.32 -6.85 12.68 4.27 2.3 6.85-12.68 0.49 0.27 -0.81 1.5c-0.26 0.48-0.07 1.1 0.44 1.37l5.09 2.75c0.5 0.27 1.12 0.1 1.38-0.39l0.81-1.5 0.72 0.39 -1.49 2.75c-0.41 0.76-0.38 1.58 0.08 1.82l4.61 2.49c0.45 0.24 1.15-0.18 1.56-0.94l1.49-2.75 0.69 0.37 -6.85 12.68 4.26 2.3 6.85-12.68 0.59 0.32 -6.85 12.69 4.26 2.3 14.46-26.78 -4.26-2.3 -6.88 12.74 -0.59-0.32 6.88-12.74 -4.26-2.3 -6.88 12.74 -0.69-0.37 1.49-2.75c0.41-0.76 ';
            icon += '0.38-1.58-0.08-1.82l-1.4-0.75 0.5-0.92c1.02 0.17 2.09-0.32 2.62-1.3 0.67-1.23 0.22-2.76-0.99-3.42 -1.21-0.65-2.74-0.19-3.4 1.05 -0.53 0.98-0.35 2.14 0.35 2.9l-0.5 0.92 -1.8-0.97c-0.45-0.24-1.15 0.17-1.57 0.94l-1.49 2.75 -0.72-0.39 0.81-1.5c0.26-0.48 0.07-1.1-0.44-1.36l-5.09-2.75c-0.5-0.27-1.12-0.1-1.38 0.39l-0.81 1.5 -0.49-0.27 6.88-12.74 -4.26-2.3 -6.88 12.74 -0.59-0.32 6.88-12.74 -4.26-2.3 -14.46 26.78 4.26 2.3zm14.26-11.72c0.2-0.37 0.68-0.51 1.06-0.3l3.93 ';
            icon += '2.12c0.39 0.21 0.54 0.68 0.34 1.05l-1.81 3.35c-0.2 0.37-0.68 0.51-1.06 0.3l-3.93-2.12c-0.38-0.21-0.53-0.68-0.33-1.05l1.81-3.35zm12.01-1.46c0.45-0.83 1.47-1.14 2.28-0.7 0.81 0.44 1.11 1.46 0.66 2.29 -0.44 0.83-1.47 1.14-2.28 0.7 -0.81-0.44-1.11-1.46-0.66-2.29zm-3.78 4.26c0.35-0.66 0.93-1.04 1.28-0.85l3.57 1.93c0.35 0.19 0.35 0.88-0.01 1.53l-3.19 5.91c-0.35 0.66-0.93 1.04-1.28 0.85l-3.56-1.92c-0.35-0.19-0.35-0.88 0.01-1.53l3.19-5.91zm0.19 7.49c-0.26 0.49-0.87 ';
            icon += '0.67-1.36 0.41 -0.49-0.26-0.67-0.87-0.41-1.36 0.27-0.49 0.87-0.67 1.36-0.4 0.49 0.26 0.67 0.87 0.41 1.36zm-7.46-6.31c-0.26 0.49-0.87 0.67-1.36 0.41s-0.67-0.87-0.41-1.36c0.27-0.49 0.87-0.67 1.36-0.4s0.67 0.87 0.41 1.36zm2.32 1.25c-0.26 0.49-0.87 0.67-1.36 0.41 -0.49-0.26-0.67-0.87-0.41-1.36 0.27-0.49 0.87-0.67 1.36-0.41 0.49 0.26 0.67 0.87 0.41 1.36z" fill="'+data.iconColor+'"/>';
            icon += '</svg>';
            var svgiss = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"issicon",
                iconAnchor: [25, 25],
                html:'<img src="'+svgiss+'" style="width:50px; height:50px;"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "mayflower") {
            data.iconColor = data.iconColor || "#910000";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" width="24" height="60" viewBox="0 0 4 10" aria-hidden="true" stroke-width="1.5">';
            icon += '<path d="M2 .2L1.5 5l-1 .5L.2 4S.09 5.551.1 6.25c.01.759.1 2.25.1 2.25L.5 7l1 .3.3 2.5h.4l.3-2.5 1-.3.3 1.5s.058-1.518.1-2.25C3.945 5.455 3.8 4 3.8 4l-.3 1.5-1-.5z" fill="'+data.iconColor+'"/></svg>';
            var svgmay = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"mayflowericon",
                iconAnchor: [12, 24],
                html:'<img src="'+svgmay+'" style="width:24px; height:48px; -webkit-transform:rotate('+dir+'deg); -moz-transform:rotate('+dir+'deg);"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        }
        else if (data.icon === "locate") {
            data.iconColor = data.iconColor || "cyan";
            icon = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="468px" height="468px" viewBox="0 0 468 468">';
            icon += '<polygon points="32 32 104 32 104 0 0 0 0 104 32 104" fill="'+data.iconColor+'"/>';
            icon += '<polygon points="468 0 364 0 364 32 436 32 436 104 468 104" fill="'+data.iconColor+'"/>';
            icon += '<polygon points="0 468 104 468 104 436 32 436 32 364 0 364" fill="'+data.iconColor+'"/>';
            icon += '<polygon points="436 436 364 436 364 468 468 468 468 364 436 364" fill="'+data.iconColor+'"/>';
            //icon += '<circle cx="234" cy="234" r="22" fill="'+data.iconColor+'"/>';
            icon += '</svg>';
            var svglocate = "data:image/svg+xml;base64," + btoa(icon);
            myMarker = L.divIcon({
                className:"locateicon",
                iconAnchor: [16, 16],
                html:'<img src="'+svglocate+'" style="width:32px; height:32px;"/>',
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
            labelOffset = [12,-4];
        }
        else if (data.icon === "friend") {
            marker = L.marker(ll, { icon: L.divIcon({ className: 'circle f', iconSize: [20, 12] }), title: data.name, draggable:drag });
        }
        else if (data.icon === "hostile") {
            marker = L.marker(ll, { icon: L.divIcon({ className: 'circle h', iconSize: [16, 16] }), title: data.name, draggable:drag });
        }
        else if (data.icon === "neutral") {
            marker = L.marker(ll, { icon: L.divIcon({ className: 'circle n', iconSize: [16, 16] }), title: data.name, draggable:drag });
        }
        else if (data.icon === "unknown") {
            marker = L.marker(ll, { icon: L.divIcon({ className: 'circle', iconSize: [16, 16] }), title: data.name, draggable:drag });
        }
        else if (data.icon === "danger") {
            marker = L.marker(ll, { icon: L.divIcon({ className: 'up-triangle' }), title: data.name, draggable:drag });
        }
        else if (data.icon === "earthquake") {
            marker = L.marker(ll, { icon: L.divIcon({ className: 'circle e', iconSize: [data.mag*5, data.mag*5] }), title: data.name, draggable:drag });
        }
        else if (data.icon.match(/^:.*:$/g)) {
            var em = emojify(data.icon);
            var col = data.iconColor ?? "#910000";
            myMarker = L.divIcon({
                className:"emicon",
                html: '<center><span style="font-size:2em; color:'+col+'">'+em+'</span></center>',
                iconSize: [32, 32]
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
            labelOffset = [12,-4];
        }
        else if (data.icon.match(/^https?:.*$/)) {
            var sz = data.iconSize ?? 32;
            myMarker = L.icon({
                iconUrl: data.icon,
                iconSize: [sz, sz],
                iconAnchor: [sz/2, sz/2],
                popupAnchor: [0, -sz/2]
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag, rotationAngle:dir, rotationOrigin:"center"});
            labelOffset = [sz/2-4,-4];
            delete data.iconSize;
        }
        else if (data.icon.substr(0,3) === "fa-") {
            var col = data.iconColor ?? "#910000";
            var imod = "";
            if (data.icon.indexOf(" ") === -1) { imod = "fa-2x "; }
            myMarker = L.divIcon({
                className:"faicon",
                html: '<center><i class="fa fa-fw '+imod+data.icon+'" style="color:'+col+'"></i></center>',
                iconSize: [32, 32],
                iconAnchor: [16, 12],
                popupAnchor: [0, -16]
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
            labelOffset = [8,-8];
        }
        else if (data.icon.substr(0,3) === "wi-") {
            var col = data.iconColor ?? "#910000";
            var imod = "";
            if (data.icon.indexOf(" ") === -1) { imod = "wi-2x "; }
            myMarker = L.divIcon({
                className:"wiicon",
                html: '<center><i class="wi wi-fw '+imod+data.icon+'" style="color:'+col+'"></i></center>',
                iconSize: [32, 32],
                iconAnchor: [16, 16],
                popupAnchor: [0, -16]
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
            labelOffset = [16,-16];
        }
        else {
            myMarker = L.VectorMarkers.icon({
                icon: data.icon ?? "circle",
                markerColor: (data.iconColor ?? "#910000"),
                prefix: 'fa',
                iconColor: 'white'
            });
            marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
            labelOffset = [6,-6];
        }
    }
    else if (data.hasOwnProperty("SIDC")) {
        // "SIDC":"SFGPU------E***","name":"1.C2 komp","fullname":"1.C2 komp/FTS/INSS"
        myMarker = new ms.Symbol( data.SIDC.toUpperCase(), { uniqueDesignation:unescape(encodeURIComponent(data.name)) });
        // Now that we have a symbol we can ask for the echelon and set the symbol size
        var opts = data.options || {};
        var sz = 25;
        if (myMarker.hasOwnProperty("getProperties") && myMarker.getProperties().hasOwnProperty("echelon")) {
            sz = iconSz[myMarker.getProperties().echelon];
        }
        opts.size = opts.size || sz;
        opts.size = opts.size * (opts.scale || 1);
        // escape out any isocodes eg flag symbols
        var optfields = ["additionalInformation","higherFormation","specialHeadquarters","staffComments","type","uniqueDesignation","speed","country"];
        //const regex = /\p{Extended_Pictographic}/ug;
        const regex = /(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])/gi;
        optfields.forEach(function (item) {
            if (opts.hasOwnProperty(item) && regex.test(opts[item])) {
                opts[item] = unescape(encodeURIComponent(opts[item]));
            }
        });
        myMarker = myMarker.setOptions(opts);
        var myicon = L.icon({
            iconUrl: myMarker.toDataURL(),
            iconAnchor: [myMarker.getAnchor().x, myMarker.getAnchor().y],
            className: "natoicon",
        });
        marker =  L.marker(ll, { title:data.name, icon:myicon, draggable:drag });
    }
    else {
        myMarker = L.VectorMarkers.icon({
            icon: "circle",
            markerColor: (data.iconColor ?? "#910000"),
            prefix: 'fa',
            iconColor: 'white'
        });
        marker = L.marker(ll, {title:data.name, icon:myMarker, draggable:drag});
        labelOffset = [6,-6];
    }
    marker.name = data.name;

    // var createLabelIcon = function(labelText) {
    //     return L.marker(new L.LatLng(51.05, -1.35), {icon:L.divIcon({ html:labelText })});
    // }

    // send new position at end of move event if point is draggable
    if (data.draggable === true) {
        if (data.icon) { marker.icon = data.icon; }
        if (data.iconColor) { marker.iconColor = data.iconColor; }
        if (data.SIDC) { marker.SIDC = data.SIDC.toUpperCase(); }
        var oldll;
        marker.on('dragstart', function (e) {
            oldll = marker.getLatLng();
            var ola = parseFloat(oldll.lat.toFixed(6));
            var olo = parseFloat(oldll.lng.toFixed(6));
            oldll = {lat:ola, lon:olo};
        });
        marker.on('dragend', function (e) {
            var l = marker.getLatLng().toString().replace('LatLng(','lat, lon : ').replace(')','')
            marker.setPopupContent(marker.getPopup().getContent().split("lat, lon")[0] + l);
            var b = marker.getPopup().getContent().split("heading : ");
            if (b.length === 2) { b = parseFloat(b[1].split("<br")[0]); }
            else { b = undefined; }

            var fb = allData[marker.name];
            fb.action = "move";
            fb.lat = parseFloat(marker.getLatLng().lat.toFixed(6));
            fb.lon = parseFloat(marker.getLatLng().lng.toFixed(6));
            fb.from = oldll;
            ws.send(JSON.stringify(fb));
        });
    }

    // tidy up altitude
    if (data.hasOwnProperty("alt")) {
        var reft = new RegExp('feet|ft','i');
        var refm = new RegExp('metres|m','i');
        if ( reft.test(""+data.alt) ) {
            data.alt = +(parseFloat(data.alt)).toFixed(2) + " ft";
        }
        else if ( refm.test(""+data.alt) ) {
            data.alt = +(parseFloat(data.alt)).toFixed(2) + " m";
        }
        else {
            data.alt = +(parseFloat(data.alt)).toFixed(2);
        }
    }

    // remove icon from list of properties, then add all others to popup
    if (data.hasOwnProperty("SIDC") && data.hasOwnProperty("options")) { delete data.options; }
    if (data.hasOwnProperty("icon")) { delete data.icon; }
    if (data.hasOwnProperty("iconColor")) { delete data.iconColor; }
    if (data.hasOwnProperty("photourl")) {
        words += "<img src=\"" + data.photourl + "\" style=\"max-width:100%; max-height:250px; margin-top:10px;\"><br/>";
        delete data.photourl;
    }
    if (data.hasOwnProperty("photoUrl")) {
        words += "<img src=\"" + data.photoUrl + "\" style=\"max-width:100%; max-height:250px; margin-top:10px;\"><br/>";
        delete data.photoUrl;
    }
    if (data.hasOwnProperty("videoUrl")) {
        words += '<video controls muted autoplay width="320" height="240"><source src="'+data.videoUrl+'" type="video/mp4">Your browser does not support the video tag.</video><br/>';
        delete data.videoUrl;
    }
    if (data.hasOwnProperty("ttl")) {  // save expiry time for this marker
        if (data.ttl != 0) {
            marker.ts = parseInt(Date.now()/1000) + Number(data.ttl);
        }
        delete data.ttl;
    }
    else if (maxage != 0) {
        marker.ts = parseInt(Date.now()/1000) + Number(maxage);
    }
    if (data.hasOwnProperty("weblink")) {
        if (!Array.isArray(data.weblink) || !data.weblink.length) {
            if (typeof data.weblink === "string") {
                words += "<b><a href='"+ data.weblink + "' target='_new'>more information...</a></b><br/>";
            } else {
                var tgt = data.weblink.target || "_new";
                words += "<b><a href='"+ data.weblink.url + "' target='"+ tgt + "'>" + data.weblink.name + "</a></b><br/>";
            }
        }
        else {
            data.weblink.forEach(function(weblink){
                if (typeof weblink === "string") {
                    words += "<b><a href='"+ weblink + "' target='_new'>more information...</a></b><br/>";
                }
                else {
                    var tgt = weblink.target || "_new";
                    words += "<b><a href='"+ weblink.url + "' target='"+ tgt + "'>" + weblink.name + "</a></b><br/>";
                }
            });
        }
        delete data.weblink;
    }
    var p;
    if (data.hasOwnProperty("popped") && (data.popped === true)) {
        p = true;
        delete data.popped;
    }
    if (data.hasOwnProperty("popped") && (data.popped === false)) {
        marker.closePopup();
        p = false;
        delete data.popped;
    }
    // If .label then use that rather than name tooltip
    if (data.label) {
        if (typeof data.label === "boolean" && data.label === true) {
            marker.bindTooltip(data.name, { permanent:true, direction:"right", offset:labelOffset });
        }
        else if (typeof data.label === "string" && data.label.length > 0) {
            marker.bindTooltip(data.label, { permanent:true, direction:"right", offset:labelOffset });
        }
        delete marker.options.title;
        delete data.label;
    }
    // otherwise check for .tooltip then use that rather than name tooltip
    else if (data.tooltip) {
        if (typeof data.tooltip === "string" && data.tooltip.length > 0) {
            marker.bindTooltip(data.tooltip, { direction:"bottom", offset:[0,4] });
            delete marker.options.title;
            delete data.tooltip;
        }
    }

    marker = rightmenu(marker);

    // Add any remaining properties to the info box
    var llc = data.lineColor || data.color;
    delete data.lat;
    delete data.lon;
    if (data.arc) { delete data.arc; }
    if (data.layer) { delete data.layer; }
    if (data.lineColor) { delete data.lineColor; }
    if (data.color) { delete data.color; }
    if (data.weight) { delete data.weight; }
    if (data.tracklength) { delete data.tracklength; }
    if (data.dashArray) { delete data.dashArray; }
    if (data.fill) { delete data.fill; }
    if (data.draggable) { delete data.draggable; }
    //if (!isNaN(data.speed)) { data.speed = data.speed.toFixed(2); }
    if (data.hasOwnProperty("clickable")) { delete data.clickable; }
    if (data.hasOwnProperty("fillColor")) { delete data.fillColor; }
    if (data.hasOwnProperty("radius")) { delete data.radius; }
    if (data.hasOwnProperty("greatcircle")) { delete data.greatcircle; }
    for (var i in data) {
        if ((i != "name") && (i != "length")) {
            if (typeof data[i] === "object") {
                words += i +" : "+JSON.stringify(data[i])+"<br/>";
            } else {
                words += i +" : "+data[i]+"<br/>";
            }
        }
    }
    if (data.popup) { words = data.popup; }
    else { words = words + marker.getLatLng().toString().replace('LatLng(','lat, lon : ').replace(')',''); }
    words = "<b>"+data.name+"</b><br/>" + words; //"<button style=\"border-radius:4px; float:right; background-color:lightgrey;\" onclick='popped=false;popmark.closePopup();'>X</button><br/>" + words;
    var wopt = {autoClose:false, closeButton:true, closeOnClick:false, minWidth:200};
    if (words.indexOf('<video ') >=0 || words.indexOf('<img ') >=0 ) { wopt.maxWidth="640"; }
    marker.bindPopup(words, wopt);
    marker._popup.dname = data.name;
    marker.lay = lay;                       // and the layer it is on

    marker.on('click', function(e) {
        //ws.send(JSON.stringify({action:"click",name:marker.name,layer:marker.lay,icon:marker.icon,iconColor:marker.iconColor,SIDC:marker.SIDC,draggable:true,lat:parseFloat(marker.getLatLng().lat.toFixed(6)),lon:parseFloat(marker.getLatLng().lng.toFixed(6))}));
        var fb = allData[marker.name];
        fb.action = "click";
        ws.send(JSON.stringify(fb));
    });
    if (heat && ((data.addtoheatmap != false) || (!data.hasOwnProperty("addtoheatmap")))) { // Added to give ability to control if points from active layer contribute to heatmap
        if (heatAll || map.hasLayer(layers[lay])) { heat.addLatLng(lli); }
    }
    markers[data.name] = marker;
    layers[lay].addLayer(marker);
    var track;
    if (data.track !== undefined) { track = data.track; }
    else if (data.hdg !== undefined) { track = data.hdg; }
    else if (data.heading !== undefined) { track = data.heading; }
    else if (data.bearing !== undefined) { track = data.bearing; }
    if (track != undefined) {  // if there is a heading
        if (data.speed != null && data.length === undefined) {  // and a speed - lets convert to a leader length
            data.length = parseFloat(data.speed || "0") * 60;
            var re1 = new RegExp('kn|knot|kt','i');
            var re2 = new RegExp('kph|kmh','i');
            var re3 = new RegExp('mph','i');
            if ( re1.test(""+data.speed) ) { data.length = data.length * 0.514444; }
            else if ( re2.test(""+data.speed) ) { data.length = data.length * 0.44704; }
            else if ( re3.test(""+data.speed) ) { data.length = data.length * 0.277778; }
        }
        if (data.length !== undefined) {
            if (polygons[data.name] != null && !polygons[data.name].hasOwnProperty("_layers")) {
                map.removeLayer(polygons[data.name]);
            }
            if (polygons[data.name] != null && polygons[data.name].hasOwnProperty("name") ) {
                delete(layers[lay]._layers[polygons[data.name]._leaflet_id]);
            }
            var x = ll.lng * 1; // X coordinate
            var y = ll.lat * 1; // Y coordinate
            var ll1 = ll;
            var angle = parseFloat(track);
            var lengthAsDegrees = parseFloat(data.length || "0") / 110540; // metres in a degree..ish
            var polygon = null;
            if (data.accuracy != null) {
                data.accuracy = Number(data.accuracy);
                var y2 = y + Math.sin((90-angle+data.accuracy)/180*Math.PI)*lengthAsDegrees;
                var x2 = x + Math.cos((90-angle+data.accuracy)/180*Math.PI)*lengthAsDegrees/Math.cos(y/180*Math.PI);
                var ll2 = new L.LatLng(y2,x2);
                var y3 = y + Math.sin((90-angle-data.accuracy)/180*Math.PI)*lengthAsDegrees;
                var x3 = x + Math.cos((90-angle-data.accuracy)/180*Math.PI)*lengthAsDegrees/Math.cos(y/180*Math.PI);
                var ll3 = new L.LatLng(y3,x3);
                polygon = L.polygon([ ll1, ll2, ll3 ], {weight:2, color:llc||'#900', fillOpacity:0.06, clickable:false});
            } else {
                var ya = y + Math.sin((90-angle)/180*Math.PI)*lengthAsDegrees;
                var xa = x + Math.cos((90-angle)/180*Math.PI)*lengthAsDegrees/Math.cos(y/180*Math.PI);
                var lla = new L.LatLng(ya,xa);
                polygon = L.polygon([ ll1, lla ], {weight:2, color:llc||'#900', clickable:false});
            }
            if (typeof layers[lay].getVisibleParent === 'function') {
                var vis = layers[lay].getVisibleParent(marker);
                if ((polygon !== null) && (vis !== null) && (!vis.hasOwnProperty("lay"))) {
                    polygon.setStyle({opacity:0});
                }
            }
            polygon.name = data.name;
            if (polygons[data.name] != null && polygons[data.name].hasOwnProperty("_layers")) {
                polygons[data.name].addLayer(polygon);
            }
            else {
                polygons[data.name] = polygon;
            }
            polygons[data.name].lay = lay;
            layers[lay].addLayer(polygon);
        }
    }
    if (panit === true) { map.setView(ll,map.getZoom()); }
    if (p === true) { marker.openPopup(); }
}

// handle any incoming COMMANDS to control the map remotely
function doCommand(cmd) {
    // console.log("COMMAND",cmd);
    if (cmd.init && cmd.hasOwnProperty("maplist")) {
        //basemaps = {};
        addBaseMaps(cmd.maplist,cmd.layer);
    }
    if (cmd.init && cmd.hasOwnProperty("overlist")) {
        overlays = [];
        addOverlays(cmd.overlist);
    }
    if (cmd.hasOwnProperty("toptitle")) {
        if (!inIframe ) {
            document.title = cmd.toptitle;
            document.getElementById("topwords").innerText = cmd.toptitle;
        }
    }
    if (cmd.hasOwnProperty("toplogo")) {
        if (!inIframe ) {
            document.getElementById("toplogo").src = cmd.toplogo;
            document.getElementById("toplink").setAttribute("style", "pointer-events:none");
        }
    }
    if (cmd.hasOwnProperty("clear")) {
        doTidyUp(cmd.clear);
    }
    if (cmd.hasOwnProperty("panit")) {
        if (cmd.panit == true || cmd.panit === "true") { panit = true; }
        else { panit = false; }
        document.getElementById("panit").checked = panit;
    }
    if (cmd.hasOwnProperty("hiderightclick")) {
        if (cmd.hiderightclick == "true" || cmd.hiderightclick == true) { hiderightclick = true; }
        else { hiderightclick = false; }
    }
    if (cmd.hasOwnProperty("showmenu")) {
        if ((cmd.showmenu === "hide") && (showUserMenu === true)) {
            showUserMenu = false;
            if (inIframe) {
                if (menuButton) {
                    try { map.removeControl(menuButton); }
                    catch(e) {}
                }
            }
            else { document.getElementById("bars").style.display="none"; }
        }
        else if ((cmd.showmenu === "show") && (showUserMenu === false)) {
            showUserMenu = true;
            if (inIframe) { map.addControl(menuButton); }
            else { document.getElementById("bars").style.display="unset";  }
        }
    }
    if (cmd.hasOwnProperty("showlayers")) {
        if ((cmd.showlayers === "hide") && (showLayerMenu === true)) {
            showLayerMenu = false;
            if (layercontrol) { map.removeControl(layercontrol); }
        }
        else if ((cmd.showlayers === "show") && (showLayerMenu === false)) {
            showLayerMenu = true;
            layercontrol = L.control.layers(basemaps, overlays).addTo(map);
        }
    }
    if (cmd.hasOwnProperty("grid")) {
        if (cmd.grid.hasOwnProperty("showgrid")) {
            var changed = false;
            if ((cmd.grid.showgrid == "true" || cmd.grid.showgrid == true ) && !showGrid) { changed = true; }
            if ((cmd.grid.showgrid == "false" || cmd.grid.showgrid == false ) && showGrid) { changed = true; }
            if (changed) {
                showGrid = !showGrid;
                if (showGrid) { Lgrid.addTo(map);}
                else { Lgrid.removeFrom(map);}
            }
        }
        if (cmd.grid.hasOwnProperty("opt")) {
            Lgrid.initialize(cmd.grid.opt);
            if (showGrid) {
                Lgrid.removeFrom(map);
                Lgrid.addTo(map);
            }
        }
    }
    if (cmd.hasOwnProperty("ruler")) {
        if (cmd.ruler.hasOwnProperty("showruler")) {
            var changed = false;
            if ((cmd.ruler.showruler == "true" || cmd.ruler.showruler == true ) && !showRuler) { changed = true; }
            if ((cmd.ruler.showruler == "false" || cmd.ruler.showruler == false ) && showRuler) { changed = true; }
            if (changed) {
                showRuler = !showRuler;
                if (showRuler) { rulerButton.addTo(map); }
                else { rulerButton.remove(); }
            }
        }
    }
    if (cmd.hasOwnProperty("button")) {
        if (!Array.isArray(cmd.button)) { cmd.button = [cmd.button]; }
        cmd.button.forEach(function(b) {
            if (b.icon) {
                if (!buttons[b.name]) {
                    buttons[b.name] = L.easyButton( b.icon, function() {
                        ws.send(JSON.stringify({action:"button", name:b.name}));
                    }, b.name, { position:b.position||'topright' }).addTo(map);
                }
            }
            else {
                if (buttons[b.name]) {
                    buttons[b.name].removeFrom(map);
                    delete buttons[b.name];
                }
            }
        })
    }
    if (cmd.hasOwnProperty("trackme")) {
        if (cmd.trackme === false) {
            followState = false;
            map.stopLocate();
            if (errRing) { errRing.removeFrom(map); }
            delMarker(followMode.name || "self")
            if (trackMeButton !== undefined) { trackMeButton.state('track-off'); }
        }
        else {
            followState = true;
            if (cmd.trackme === true) { followMode = { accuracy:true }; }
            else { followMode = cmd.trackme; }
            map.locate({setView:false, watch:followState, enableHighAccuracy:true});
            if (trackMeButton !== undefined) { trackMeButton.state('track-on'); }
        }
    }
    if (cmd.hasOwnProperty("contextmenu")) {
        if (typeof cmd.contextmenu === "string") {
            addmenu = cmd.contextmenu;
            rightmenuMap.setContent(addmenu);
        }
    }
    if (cmd.hasOwnProperty("allowFileDrop")) {
        if (typeof cmd.allowFileDrop === "string") {
            allowFileDrop = cmd.allowFileDrop === "false" ? false : true;
        }
    }
    if (cmd.hasOwnProperty("coords")) {
        try { coords.removeFrom(map); }
        catch(e) {}
        var opts = {gps:false, gpsLong:false, utm:false, utmref:false, position:"bottomleft"}
        if (cmd.coords == "deg") { opts.gps = true; }
        if (cmd.coords == "dms") { opts.gpsLong = true; }
        if (cmd.coords == "utm") { opts.utm = true; }
        if (cmd.coords == "mgrs") { opts.utmref = true; }
        if (cmd.coords == "qth") { opts.qth = true; }
        coords.options = opts;
        coords.addTo(map);
    }
    if (cmd.hasOwnProperty("legend")) {
        if (typeof cmd.legend === "string" && cmd.legend.length > 0) {
            if (!legend.getContainer()) {   //if legend not exist create it
                legend.onAdd = function() {
                    var div = L.DomUtil.create("div", "legend");
                    div.innerHTML = cmd.legend;
                    return div;
                };
                legend.addTo(map);
            }
            legend.getContainer().style.visibility = 'visible'; // if already exist use visibility to show/hide
            legend.getContainer().innerHTML = cmd.legend;       //  set content of legend
        }
        else {
            if (legend.getContainer()) {
                legend.getContainer().style.visibility = 'hidden'; //if empty string and legend already created hide it
            }
        }
    }

    var existsalready = false;
    // Add a new base map layer
    if (cmd.map && cmd.map.hasOwnProperty("name") && cmd.map.name.length>0 && cmd.map.hasOwnProperty("url") && cmd.map.hasOwnProperty("opt")) {
        // console.log("BASE",cmd.map);
        if (basemaps.hasOwnProperty(cmd.map.name)) { existsalready = true; }
        if (cmd.map.hasOwnProperty("wms")) {   // special case for wms
            console.log("New WMS:",cmd.map.name);
            if (cmd.map.wms === "grey") {
                basemaps[cmd.map.name] = L.tileLayer.graywms(cmd.map.url, cmd.map.opt);
            }
            else {
                basemaps[cmd.map.name] = L.tileLayer.wms(cmd.map.url, cmd.map.opt);
            }
        }
        else {
            console.log("New Map:",cmd.map.name);
            basemaps[cmd.map.name] = L.tileLayer(cmd.map.url, cmd.map.opt);
        }
        //if (!existsalready && !inIframe) {
        if (!existsalready) {
            layercontrol.addBaseLayer(basemaps[cmd.map.name],cmd.map.name);
        }
    }
    // Add or swap new minimap layer
    if (cmd.map && cmd.map.hasOwnProperty("minimap")) {
        if (minimap) { map.removeControl(minimap); }
        if (cmd.map.minimap == false) { return; }
        if (basemaps[cmd.map.minimap]) {
            minimap = new L.Control.MiniMap(basemaps[cmd.map.minimap], cmd.map.opt).addTo(map);
        }
        else {
            console.log("Invalid base layer for minimap:",cmd.map.minimap);
        }

    }
    // Remove one or more map layers (base or overlay)
    if (cmd.map && cmd.map.hasOwnProperty("delete")) {
        if (!Array.isArray(cmd.map.delete)) { cmd.map.delete = [cmd.map.delete]; }
        for (var a=0; a < cmd.map.delete.length; a++) {
            if (basemaps.hasOwnProperty(cmd.map.delete[a])) { delete basemaps[cmd.map.delete[a]]; }
            if (overlays.hasOwnProperty(cmd.map.delete[a])) { delete overlays[cmd.map.delete[a]]; }
        }
        if (showLayerMenu) {
            map.removeControl(layercontrol);
            layercontrol = L.control.layers(basemaps, overlays).addTo(map);
        }
    }
    // Add a new geojson overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("geojson") ) {
        if (overlays.hasOwnProperty(cmd.map.overlay)) {
            map.removeLayer(overlays[cmd.map.overlay]);
            existsalready = true;
        }
        var opt = cmd.map.opt || { style:function(feature) {
            var st = { stroke:true, weight:2, fill:true };
            if (feature.hasOwnProperty("properties")) {
                st.color = feature.properties.color||feature.properties.roofColor||"black";
                if (feature.properties.hasOwnProperty("color")) { delete feature.properties.color; }
                if (feature.properties.hasOwnProperty("roofColor")) { delete feature.properties.roofColor; }
            }
            if (feature.hasOwnProperty("properties") && feature.properties.hasOwnProperty('style')) {
                if (feature.properties.style.hasOwnProperty('stroke')) {
                    st.color = feature.properties.style.stroke;
                }
                if (feature.properties.style.hasOwnProperty('stroke-width')) {
                    st.weight = feature.properties.style["stroke-width"];
                }
                if (feature.properties.style.hasOwnProperty('stroke-opacity')) {
                    st.opacity = feature.properties.style["stroke-opacity"];
                }
                if (feature.properties.style.hasOwnProperty('fill')) {
                    if (feature.properties.style.fill == "none") { st.fill = false; }
                    else { st.fillColor = feature.properties.style.fill; }
                }
                if (feature.properties.style.hasOwnProperty('fill-opacity')) {
                    st.fillOpacity = feature.properties.style["fill-opacity"];
                }
            }
            delete feature.properties.style;
            return st;
        }};
        opt.onEachFeature = function (f,l) {
            var pw = '<pre>'+JSON.stringify(f.properties,null,' ').replace(/[\{\}"]/g,'')+'</pre>';
            if (pw.length > 11) { l.bindPopup(pw); }
            if (cmd.map.hasOwnProperty("clickable") && cmd.map.clickable === true) {
                l.on('click', function (e) {
                    ws.send(JSON.stringify({action:"clickgeo",name:cmd.map.overlay,type:f.type,properties:f.properties,geometry:f.geometry}));
                });
            }
        }
        overlays[cmd.map.overlay] = L.geoJson(cmd.map.geojson,opt);
        if (!existsalready) {
            layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        }
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            map.addLayer(overlays[cmd.map.overlay]);
        }
        if (cmd.map.hasOwnProperty("fit") && (cmd.map.fit === true)) { map.fitBounds(overlays[cmd.map.overlay].getBounds()); }
    }
    // Add a new NVG XML overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("nvg") ) {
        if (overlays.hasOwnProperty(cmd.map.overlay)) {
            map.removeLayer(overlays[cmd.map.overlay]);
            existsalready = true;
        }
        var parser = new NVG(cmd.map.nvg);
        var geoj = parser.toGeoJSON();
        overlays[cmd.map.overlay] = L.geoJson(geoj,{
            style: function(feature) {
                var st = { stroke:true, color:"black", weight:2, fill:true };
                if (feature.hasOwnProperty("properties") && feature.properties.hasOwnProperty('style')) {
                    if (feature.properties.style.hasOwnProperty('stroke')) {
                        st.color = feature.properties.style.stroke;
                    }
                    if (feature.properties.style.hasOwnProperty('stroke-width')) {
                        st.weight = feature.properties.style["stroke-width"];
                    }
                    if (feature.properties.style.hasOwnProperty('stroke-opacity')) {
                        st.opacity = feature.properties.style["stroke-opacity"];
                    }
                    if (feature.properties.style.hasOwnProperty('fill')) {
                        if (feature.properties.style.fill == "none") { st.fill = false; }
                        else { st.fillColor = feature.properties.style.fill; }
                    }
                    if (feature.properties.style.hasOwnProperty('fill-opacity')) {
                        st.fillOpacity = feature.properties.style["fill-opacity"];
                    }
                }
                return st;
            },
            pointToLayer: function (feature, latlng) {
                if (feature.hasOwnProperty("properties") && feature.properties.hasOwnProperty('symbol')) {
                    var sidc = feature.properties.symbol.toUpperCase().replace("APP6A:",'')//.substr(0,13);
                    var country;
                    if (sidc.length > 12) { country = sidc.substr(12).replace(/-/g,''); sidc = sidc.substr(0,12); }
                    myMarker = new ms.Symbol( sidc, {
                        uniqueDesignation:feature.properties.label,
                        country:country,
                        direction:feature.properties.course,
                        additionalInformation:feature.properties.modifier,
                        size:24
                    });
                    var myicon = L.icon({
                        iconUrl: myMarker.toDataURL(),
                        iconAnchor: [myMarker.getAnchor().x, myMarker.getAnchor().y],
                        className: "natoicon",
                    });
                    return L.marker(latlng, { name:feature.properties.label, icon:myicon });
                }
                else {
                    var geojsonMarkerOptions = {
                        radius: 10,
                        fillColor: "#ff7800",
                        color: "#000",
                        weight: 1,
                        opacity: 1,
                        fillOpacity: 0.8
                    };
                    return L.circleMarker(latlng, geojsonMarkerOptions);
                }
            }
        });
        if (!existsalready) {
            layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        }
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            map.addLayer(overlays[cmd.map.overlay]);
        }
        if (cmd.map.hasOwnProperty("fit")) { map.fitBounds(overlays[cmd.map.overlay].getBounds()); }
    }

    var custIco = function() {
        var col = cmd.map.iconColor ?? "#910000";
        var myMarker = L.VectorMarkers.icon({
            icon: "circle",
            markerColor: col,
            prefix: 'fa',
            iconColor: 'white'
        });
        if (cmd.map.hasOwnProperty("icon")) {
            myMarker = L.divIcon({
                className:"faicon",
                html: '<center><i class="fa fa-fw '+cmd.map.icon+'" style="color:'+col+'"></i></center>',
                iconSize: [16, 16],
            });
        }
        var customLayer = L.geoJson(null, {
            pointToLayer: function(geoJsonPoint, latlng) {
                //console.log("KML/GPX point",geoJsonPoint)
                var d = (geoJsonPoint.properties.description || "").trim();
                var mypop = '<b>'+geoJsonPoint.properties.name + '</b><br>'+d+'<br>lat,lon : ' + geoJsonPoint.geometry.coordinates[1] + ', ' + geoJsonPoint.geometry.coordinates[0];
                if (geoJsonPoint.geometry.coordinates[2]) {
                    mypop = '<b>'+geoJsonPoint.properties.name + '</b><br>'+d+'<br>lat,lon.alt : ' + geoJsonPoint.geometry.coordinates[1] + ', ' + geoJsonPoint.geometry.coordinates[0] + ', ' + geoJsonPoint.geometry.coordinates[2];
                }
                return L.marker(latlng, {icon:myMarker, title:geoJsonPoint.properties.name}).bindPopup(mypop);
            }
        });
        return customLayer;
    }

    // Add a new KML overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("kml") ) {
        if (overlays.hasOwnProperty(cmd.map.overlay)) {
            overlays[cmd.map.overlay].removeFrom(map);
            existsalready = true;
        }
        try {
            const parser = new DOMParser();
            const kml = parser.parseFromString(cmd.map.kml, 'text/xml');
            const track = new L.KML(kml);
            overlays[cmd.map.overlay] = track;
        } catch(e) { console.log("Failed to parse KML") }
        if (!existsalready) {
            layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        }
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            overlays[cmd.map.overlay].addTo(map);
        }
        if (cmd.map.hasOwnProperty("fit")) { map.fitBounds(overlays[cmd.map.overlay].getBounds()); }
    }
    // Add a new TOPOJSON overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("topojson") ) {
        if (overlays.hasOwnProperty(cmd.map.overlay)) {
            overlays[cmd.map.overlay].removeFrom(map);
            existsalready = true;
        }
        overlays[cmd.map.overlay] = omnivore.topojson.parse(cmd.map.topojson);
        if (!existsalready) {
            layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        }
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            overlays[cmd.map.overlay].addTo(map);
        }
        if (cmd.map.hasOwnProperty("fit")) { map.fitBounds(overlays[cmd.map.overlay].getBounds()); }
    }
    // Add a new GPX overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("gpx") ) {
        if (overlays.hasOwnProperty(cmd.map.overlay)) {
            overlays[cmd.map.overlay].removeFrom(map);
            existsalready = true;
        }
        overlays[cmd.map.overlay] = omnivore.gpx.parse(cmd.map.gpx, null, custIco());
        if (!existsalready) {
            layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        }
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            overlays[cmd.map.overlay].addTo(map);
        }
        if (cmd.map.hasOwnProperty("fit")) { map.fitBounds(overlays[cmd.map.overlay].getBounds()); }
    }
    // Add a new velocity overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("velocity") ) {
        if (overlays.hasOwnProperty(cmd.map.overlay)) {
            overlays[cmd.map.overlay].removeFrom(map);
            layercontrol.removeOverlay(overlays[cmd.map.overlay]);
        }
        overlays[cmd.map.overlay] = L.velocityLayer(cmd.map.velocity);
        layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            overlays[cmd.map.overlay].addTo(map);
        }
        if (cmd.map.hasOwnProperty("fit")) { map.fitBounds(overlays[cmd.map.overlay].getBounds()); }
    }
    // Add a new overlay layer
    if (cmd.map && cmd.map.hasOwnProperty("overlay") && cmd.map.hasOwnProperty("url") && cmd.map.hasOwnProperty("opt")) {
        console.log("New overlay:",cmd.map.overlay);
        if (overlays.hasOwnProperty(cmd.map.overlay)) { existsalready = true; }
        if (cmd.map.hasOwnProperty("wms")) {   // special case for wms
            if (cmd.map.wms === "grey") {
                overlays[cmd.map.overlay] = L.tileLayer.graywms(cmd.map.url, cmd.map.opt);
            }
            else {
                overlays[cmd.map.overlay] = L.tileLayer.wms(cmd.map.url, cmd.map.opt);
            }
        }
        else if (cmd.map.hasOwnProperty("bounds")) {            //Image Overlay in the bounds specified (2D Array)
            if (cmd.map.bounds.length === 2 && cmd.map.bounds[0].length === 2 && cmd.map.bounds[1].length === 2) {
                overlays[cmd.map.overlay] = new L.imageOverlay(cmd.map.url, L.latLngBounds(cmd.map.bounds), cmd.map.opt);
            }
        }
        else if (cmd.map.url.slice(-4).toLowerCase() === ".pbf") {
            overlays[cmd.map.overlay] = VectorTileLayer(cmd.map.url, cmd.map.opt);
        }
        else if (cmd.map.hasOwnProperty("transparentPixels")) {
            cmd.map.opt.pixelCodes =  cmd.map.transparentPixels;
            cmd.map.opt.matchRGBA = [ 0,0,0,0 ];
            overlays[cmd.map.overlay] = L.tileLayerPixelFilter(cmd.map.url, cmd.map.opt);
        }
        else {
            overlays[cmd.map.overlay] = L.tileLayer(cmd.map.url, cmd.map.opt);
        }
        //if (!existsalready && !inIframe) {
        if (!existsalready) {
            layercontrol.addOverlay(overlays[cmd.map.overlay],cmd.map.overlay);
        }
        if (!cmd.map.hasOwnProperty("visible") || (cmd.map.visible != false)) {
            overlays[cmd.map.overlay].addTo(map);
        }
    }
    // Swap a base layer
    if (cmd.layer && basemaps.hasOwnProperty(cmd.layer)) {
        map.removeLayer(basemaps[baselayername]);
        baselayername = cmd.layer;
        basemaps[baselayername].addTo(map);
    }
    // If set to none then remove the baselayer...
    if (cmd.layer && (cmd.layer === "none")) {
        map.removeLayer(basemaps[baselayername]);
        baselayername = cmd.layer;
    }
    // Add search command
    if (cmd.hasOwnProperty("search") && (typeof cmd.search === "string")) {
        document.getElementById('search').value = cmd.search;
        if (cmd.search !== "") {
            openMenu();
            doSearch();
        }
        else {
            closeMenu();
            clearSearch();
        }
    }
    // Add side by side control
    if (cmd.side && (cmd.side === "none")) {
        sidebyside.remove();
        map.removeLayer(basemaps[sidebyside.lay]);
        sidebyside = undefined;
    }
    if (cmd.side && basemaps.hasOwnProperty(cmd.side)) {
        if (sidebyside) { sidebyside.remove(); map.removeLayer(basemaps[sidebyside.lay]); }
        basemaps[cmd.side].addTo(map);
        sidebyside = L.control.sideBySide(basemaps[baselayername], basemaps[cmd.side]);
        sidebyside.addTo(map);
        sidebyside.lay = cmd.side;
    }
    if (cmd.split && sidebyside && (cmd.split <= 100) && (cmd.split >= 0)) { sidebyside.setSplit(cmd.split); }
    // Turn on an existing overlay(s)
    if (cmd.hasOwnProperty("showlayer")) {
        if (typeof cmd.showlayer === "string") { cmd.showlayer = [ cmd.showlayer ]; }
        var sn = cmd.showlayer.indexOf("ship nav");
        if (sn !== -1) { cmd.showlayer[sn] = "ship navigation"; }
        for (var i=0; i < cmd.showlayer.length; i++) {
            if (overlays.hasOwnProperty(cmd.showlayer[i])) {
                map.addLayer(overlays[cmd.showlayer[i]]);
            }
        }
    }
    // Turn off an existing overlay(s)
    if (cmd.hasOwnProperty("hidelayer")) {
        if (typeof cmd.hidelayer === "string") { cmd.hidelayer = [ cmd.hidelayer ]; }
        var sn = cmd.hidelayer.indexOf("ship nav");
        if (sn !== -1) { cmd.hidelayer[sn] = "ship navigation"; }
        for (var i=0; i < cmd.hidelayer.length; i++) {
            if (overlays.hasOwnProperty(cmd.hidelayer[i])) {
                map.removeLayer(overlays[cmd.hidelayer[i]]);
            }
        }
    }
    // Lock the pan so map can be moved
    if (cmd.hasOwnProperty("panlock")) {
        if (cmd.panlock == "true" || cmd.panlock == true) { lockit = true; }
        else { lockit = false; doLock(false); }
        document.getElementById("lockit").checked = lockit;
    }
    // move to a new position
    var clat = map.getCenter().lat;
    var clon = map.getCenter().lng;
    var czoom = map.getZoom();
    if (cmd.hasOwnProperty("lat")) { clat = cmd.lat; }
    if (cmd.hasOwnProperty("lon")) { clon = cmd.lon; }
    if (cmd.hasOwnProperty("zoom")) { czoom = cmd.zoom; }
    map.setView([clat,clon],czoom);

    if (cmd.hasOwnProperty("cluster")) {
        clusterAt = cmd.cluster;
        document.getElementById("setclus").value = cmd.cluster;
        setCluster(clusterAt);
    }
    if (cmd.hasOwnProperty("maxage")) {
        document.getElementById("maxage").value = cmd.maxage;
        setMaxAge();
    }
    // Replace heatmap layer with new array (and optionally options)
    if (cmd.hasOwnProperty("heatmap") && heat) {
        if (cmd.hasOwnProperty("options")) { heat.setOptions(cmd.options); }
        heat.setLatLngs(cmd.heatmap);
        // heat.setOptions(cmd.heatmap);
        // document.getElementById("heatall").checked = !!cmd.heatmap;
        // heat.redraw();
    }
    if (cmd.hasOwnProperty("panlock") && lockit === true) { doLock(true); }
    if (cmd.hasOwnProperty("zoomlock")) {
        if (cmd.zoomlock == "true" || cmd.zoomlock == true) {
            if (map.doubleClickZoom.enabled()) { map.removeControl(map.zoomControl); }
            map.doubleClickZoom.disable();
            map.scrollWheelZoom.disable();
            map.touchZoom.disable();
        }
        else {
            if (!map.doubleClickZoom.enabled()) { map.addControl(map.zoomControl); }
            map.doubleClickZoom.enable();
            map.scrollWheelZoom.enable();
            map.touchZoom.enable();
        }
    }
    if (cmd.hasOwnProperty("bounds")) {            // Move/Zoom map to new bounds
        if (cmd.bounds.length === 2 && cmd.bounds[0].length === 2 && cmd.bounds[1].length === 2) {
            map.fitBounds(cmd.bounds);
        }
    }
}

// handle any incoming GEOJSON directly - may style badly
function doGeojson(n,g,l,o) {
    //console.log("GEOJSON",n,g,l,o)
    var lay = l ?? g.name ?? "unknown";
    // if (!basemaps[lay]) {
    var opt = { style: function(feature) {
        var st = { stroke:true, color:"#910000", weight:1, fill:true, fillColor:"#910000", fillOpacity:0.15 };
        st = Object.assign(st,o);
        if (feature.hasOwnProperty("properties")) {
            //console.log("GPROPS", feature.properties)
            st.color = feature.properties["stroke"] ?? st.color;
            st.weight = feature.properties["stroke-width"] ?? st.weight;
            st.fillColor = feature.properties["fill-color"] ?? feature.properties["fill"] ?? st.fillColor;
            st.fillOpacity = feature.properties["fill-opacity"] ?? st.fillOpacity;
            delete feature.properties["stroke"];
            delete feature.properties["stroke-width"];
            delete feature.properties["fill-color"];
            delete feature.properties["fill"];
            delete feature.properties["fill-opacity"];
            delete feature.properties["stroke-opacity"];
        }
        if (feature.hasOwnProperty("style")) {
            //console.log("GSTYLE", feature.style)
            st.color = feature.style["stroke"] ?? st.color;
            st.weight = feature.style["stroke-width"] ?? st.weight;
            st.fillColor = feature.style["fill-color"] ?? feature.style["fill"] ?? st.fillColor;
            st.fillOpacity = feature.style["fill-opacity"] ?? st.fillOpacity;
        }
        if (feature.hasOwnProperty("geometry") && feature.geometry.hasOwnProperty("type") && (feature.geometry.type === "LineString" || feature.geometry.type === "MultiLineString")  ) {
            st.fill = false;
        }
        return st;
    }}
    opt.pointToLayer = function (feature, latlng) {
        var myMarker;
        if (feature.properties.hasOwnProperty("icon")) {
            var regi = /^[S,G,E,I,O][A-Z]{3}.*/i;  // if it looks like a SIDC code
            if (regi.test(feature.properties.icon)) {
                feature.properties.SIDC = (feature.properties.icon.toUpperCase()+"------------").substr(0,12);
                delete feature.properties.icon;
            }
        }
        if (feature.properties.hasOwnProperty("SIDC")) {
            myMarker = new ms.Symbol( feature.properties.SIDC.toUpperCase(), {
                uniqueDesignation:unescape(encodeURIComponent(feature.properties.title||feature.properties.unit)),
                country:feature.properties.country,
                direction:feature.properties.bearing,
                additionalInformation:feature.properties.modifier,
                size:25
            });
            if (myMarker.hasOwnProperty("metadata") && myMarker.metadata.hasOwnProperty("echelon")) {
                var sz = iconSz[myMarker.metadata.echelon];
                myMarker.setOptions({size:sz});
            }
            myMarker = L.icon({
                iconUrl: myMarker.toDataURL(),
                iconAnchor: [myMarker.getAnchor().x, myMarker.getAnchor().y],
                className: "natoicon",
            });
        }
        else {
            myMarker = L.VectorMarkers.icon({
                icon: feature.properties["marker-symbol"] ?? "circle",
                markerColor: (feature.properties["marker-color"] ?? "#910000"),
                prefix: 'fa',
                iconColor: 'white'
            });
        }
        if (!feature.properties.hasOwnProperty("title")) {
            feature.properties.title = feature.properties["marker-symbol"];
        }
        if (feature.properties.hasOwnProperty("url")) {
            feature.properties.url = "<a target='_new' href='"+feature.properties.url+"'>"+feature.properties.url+"</a>";
        }
        delete feature.properties["marker-symbol"];
        delete feature.properties["marker-color"];
        delete feature.properties["marker-size"];
        var nf = {title:feature.properties.title, name:feature.properties.name};
        feature.properties = Object.assign(nf, feature.properties);
        return L.marker(latlng, {title:feature.properties.title ?? "", icon:myMarker});
    }
    opt.onEachFeature = function (f,l) {
        if (f.properties && Object.keys(f.properties).length > 0) {
            var tx = JSON.stringify(f.properties,null,' ');
            if ( tx !== "{}") {
                l.bindPopup('<pre style="overflow-x: scroll">'+JSON.stringify(f.properties,null,' ').replace(/[\{\}"]/g,'')+'</pre>');
            }
        }
        if (o && o.hasOwnProperty("clickable") && o.clickable === true) {
            l.on('click', function (e) {
                ws.send(JSON.stringify({action:"clickgeo",name:n,type:f.type,properties:f.properties,geometry:f.geometry}));
            });
        }
    }
    markers[n] = L.geoJson(g,opt);
    markers[n].lay = lay;
    if (typeof layers[lay] == "undefined") {  // add layer if if doesn't exist
        layers[lay] = new L.LayerGroup();
        overlays[lay] = layers[lay];
        layercontrol.addOverlay(overlays[lay],lay);
    }
    layers[lay].addLayer(markers[n]);
    map.addLayer(layers[lay]);
}