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var mymap;
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var heatmapLayer = null;
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var startX = 49.7248;
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var startY = 13.3521;
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var startZoom = 17;
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var dataSourceRoute;
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var currentTime;
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var name;
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var date;
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var timer;
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var isAnimationRunning = false;
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var data = [];
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function initMap() {
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mymap = L.map('heatmap').setView([startX, startY], startZoom);
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L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
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attribution: '',
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maxZoom: 19
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}).addTo(mymap);
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mymap.on('click', showInfo);
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}
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var info = [];
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var currenInfo = 0;
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var infoLength = 0;
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function showInfo(e) {
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info = []
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currenInfo = 0;
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// https://wiki.openstreetmap.org/wiki/Zoom_levels
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// Todo change to variable - it is used in heatmap init
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var stile = 40075016.686 * Math.cos(startX) / Math.pow(2, mymap.getZoom()) ;
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var radius = 25 * stile / 256;
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var i = 0;
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var lat = 0;
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var lng = 0;
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data[currentTime]['items'].forEach(element => {
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if (e.latlng.distanceTo(new L.LatLng(element.x, element.y)) < radius) {
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lat += element.x
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lng += element.y;
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info[i] = {'place' : element.place, 'number' : element.number};
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i++;
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}
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});
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if (info.length > 0) {
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var popup = L.popup({
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autoPan: false
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})
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.setLatLng([lat / i, lng / i])
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.setContent('<div id=\'place-info\'>Umístění: ' + info[currenInfo].place + '</div>' +
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'<div id=\'number-info\'>Počet: ' + info[currenInfo].number + '</div>' +
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'<div class=\'popup-controls\'>' +
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'<button id=\'previous-info-btn\' class=\'circle-button\' onclick=\'previousInfo()\'></button>' +
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'<div id=\'count-info\'>' + (currenInfo + 1) + '/' + info.length + '</div>' +
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'<button id=\'next-info-btn\' onclick=\'nextInfo()\' class=\'circle-button next\'></button>' +
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'</div>'
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)
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.openOn(mymap);
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if (info.length == 1) {
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$('#previous-info-btn').prop('disabled', true);
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$('#next-info-btn').prop('disabled', true);
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$('.popup-controls').hide();
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}
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}
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}
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function previousInfo() {
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currenInfo = (currenInfo + info.length - 1) % info.length;
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displayInfoText();
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}
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function nextInfo() {
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currenInfo = (currenInfo + 1) % info.length
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displayInfoText();
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}
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function displayInfoText() {
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$('#place-info').html('Umístění: ' + info[currenInfo].place)
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$('#number-info').html('Počet: ' + info[currenInfo].number)
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$('#count-info').html(currenInfo + 1 + '/' + info.length);
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}
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function setMapView(latitude = startX, longitude = startY, zoom = startZoom) {
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mymap.setView([latitude, longitude], zoom);
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}
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function changeAnimationState() {
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isAnimationRunning = !isAnimationRunning
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if (isAnimationRunning) {
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$('#play-pause').attr('class', 'pause');
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timer = setInterval(
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function() {
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mymap.closePopup();
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next();
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},
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800
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);
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}
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else {
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clearTimeout(timer);
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$('#play-pause').attr('class', 'play');
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}
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}
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function previous() {
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currentTime = (currentTime + 23) % 24;
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drawHeatmap(data[currentTime]);
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setTimeline();
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}
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function next() {
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currentTime = (currentTime + 1) % 24;
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drawHeatmap(data[currentTime]);
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setTimeline();
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}
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function setTimeline() {
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$('#timeline').text(currentTime + ":00");
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$('#timeline').attr('class', 'time hour-' + currentTime);
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}
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function loadCurrentTimeHeatmap(route) {
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dataSourceRoute = route;
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data = []
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name = $('#type').children("option:selected").text();
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var parts = $('#date').val().split('-');
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date = parts[2] + parts[1] + parts[0];
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currentTime = parseInt($('#time').children("option:selected").val());
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setTimeline();
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$.ajax({
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type: "POST",
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url: dataSourceRoute + '/' + name + '/' + date + '/' + currentTime,
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success: function(result) {
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data[currentTime] = result;
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drawHeatmap(data[currentTime]);
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}
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});
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preload(currentTime, 1);
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preload(currentTime, -1);
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}
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function preload(time, change) {
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var ntime = time + change;
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if (0 <= ntime && ntime <= 23) {
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$.ajax({
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type: "POST",
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url: dataSourceRoute + '/' + name + '/' + date + '/' + ntime,
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success: function(result) {
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data[ntime] = result;
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preload(ntime, change);
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}
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});
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}
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}
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function drawHeatmap(data) {
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// Todo still switched
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if (data['items'] != null) {
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points = data['items'].map(function (p) { return [p['x'], p['y'], p['number']]; });
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if (heatmapLayer != null) {
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mymap.removeLayer(heatmapLayer);
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}
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heatmapLayer = L.heatLayer(points, {'max' : data['max'], 'minOpacity' : 0.5, 'radius' : 35, 'blur' : 30}).addTo(mymap);
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}
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else {
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if (heatmapLayer != null) {
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mymap.removeLayer(heatmapLayer);
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}
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}
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// var heat_01 = ...
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// on background map.addLayer(heat_01) -> map.removeLayer(heat_01);
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// $(.leaflet-heatmap-layer).css('opacity', 'value');
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}
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function checkDataSetsAvailability(route) {
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var parts = $('#date').val().split('-');
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$.ajax({
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type: "POST",
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// Todo it might be good idea to change db collections format
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url: route + '/' + parts[2] + parts[1] + parts[0],
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success: function(result) {
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updateAvailableDataSets(result);
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}
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});
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}
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function updateAvailableDataSets(available) {
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var options = '';
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Object.entries(available).forEach(([key, value]) => {
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options += '<option value="' + value + '">' + key + '</option>\n';
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});
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$('#type').empty().append(options);
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}
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