282 lines
10 KiB
HTML
282 lines
10 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<title>Covid-19 map</title>
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<meta charset="utf-8"/>
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<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.1/leaflet.css"/>
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<style type="text/css">
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.leaflet-container {
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background-color: #c5e8ff;
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}
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</style>
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</head>
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<body>
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<div style="display:flex;">
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<div>
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<div id="map" style="width: 534px; height: 350px"></div>
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<div>
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<span><a target="_blank" href="https://www.ecdc.europa.eu/en/publications-data/download-todays-data-geographic-distribution-covid-19-cases-worldwide">Data source - ecdc.europa.eu</a></span>
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<br/>
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<span><a target="_blank" href="https://geojson-maps.ash.ms/">Map geojson source - geojson-maps.ash.ms</a></span>
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</div>
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</div>
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<div style="padding-left:10px;">
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<h1></h1>
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<label>Autoplay <input id="autoplay_checkbox" type="checkbox"></label>
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<br />
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<label>Date <span id="date_range_current">2019-12-31</span>
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<input id="date_range" style="width:400px;" type="range" step="1" min="0" max="0"></label>
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<br />
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<div id="coronacases" style="max-height:280px;overflow:auto;padding-top:10px;"></div>
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</div>
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</div>
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<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
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<script src="http://cdn.leafletjs.com/leaflet-0.7.1/leaflet.js"></script>
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<script>
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// helper
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var gid = function(id) {
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return document.getElementById(id);
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}
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// maps
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var mapPath = 'data/110m.geo.json'
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var mapStyle = {
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stroke: true,
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weight: 1,
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fill: true,
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fillColor: '#fff',
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fillOpacity: 1
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}
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var countryLayer = {};
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// gradient
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var colors = {
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start: [255, 255, 255],
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end: [255, 0, 0],
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gradients: [],
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gradientsCol: [],
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range: 50,
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autoplaySpeed: 250,
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}
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// https://stackoverflow.com/questions/24016456/how-to-programmatically-create-n-sequential-equidistant-colors-ranging-from-dark
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var linearGradient = function (n) {
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var gradients = [];
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var gradientsCol = [];
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var dRGB = [];
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for (var i = 0;i<colors.start.length;i++) {
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var color1 = colors.start[i];
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var color2 = colors.end[i];
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var c = (color2 - color1)/((n/2) - 1);
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dRGB.push(c);
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}
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for (var k = 0;k<n;k++) {
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var col = [];
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for(var j = 0;j<colors.start.length;j++) {
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var dx = dRGB[j];
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var color1 = colors.start[j];
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var c = parseInt(color1+k*dx);
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col.push(c);
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}
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gradientsCol.push('rgb('+col.join(',')+')');
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gradients.push(col);
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}
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colors.gradients = gradients;
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colors.gradientsCol = gradientsCol;
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}
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linearGradient(colors.range+1);
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$.getJSON(mapPath, function (data) {
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var map = L.map('map').setView([45, 0], 1.05)
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L.geoJson(data, {
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clickable: false,
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style: mapStyle,
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onEachFeature: function (feature, layer) {
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// console.log(feature, feature.properties.iso_a2);
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countryLayer[feature.properties.iso_a2] = layer;
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layer.on('mouseover', function () {
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layer.setStyle({
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fillColor: '#0000ff'
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})
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})
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layer.on('mouseout', function () {
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layer.setStyle({
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fillColor: '#fff'
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})
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})
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},
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}).addTo(map)
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}).then(function () {
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console.log('finish drawing countries');
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$.get('data/download.csv').then(function (data) {
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var today = new Date()
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var covidData = {}
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covidData.country = {};
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covidData.end = {day: today.getDate(), month: today.getMonth(), year: today.getFullYear()}
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covidData.start = {country: 'CN', day: 31, month: 12, year: 2019}
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data.split('\n').forEach(function (row, i) {
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if (i > 1) {
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var a = row.split(',')
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var date = a[0]
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var day = a[1]
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var month = a[2]
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var year = a[3]
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var cases = parseInt(a[4])
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var deaths = parseInt(a[5])
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var geoId = a[7]
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var population = parseInt(a[9])
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if (!covidData.country[geoId]) {
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covidData.country[geoId] = {data: {}, population: population, ctotal: 0, dtotal: 0}
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}
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covidData.country[geoId].data[year+"-"+month+"-"+day] = {cases: cases, deaths: deaths, cgrow:0, dgrow:0}
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}
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});
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return covidData;
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}).then(function(covidData) {
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// country disease calculate
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var start = covidData.start;
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// end date
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var end = new Date(covidData.end.year, covidData.end.month, covidData.end.day + 1);
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var countries = covidData.country;
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var dateFormat, ccode, country, stats;
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covidData.totalDays = 0;
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covidData.maxCasesCountry = '';
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covidData.maxCases = 0;
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covidData.maxDeathsCountry = '';
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covidData.maxDeaths = 0;
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// let's fill gaps
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var countryCache = {};
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// https://stackoverflow.com/questions/4345045/javascript-loop-between-date-ranges
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// iterate over dates
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for(var s = new Date(start.year, start.month - 1, start.day);s < end;s.setDate(s.getDate() + 1)) {
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dateFormat = s.getFullYear()+"-"+(s.getMonth() + 1)+"-"+s.getDate();
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// console.log(dateFormat)
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// iterate over countries
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for(ccode in countries) {
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country = countries[ccode];
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// precalculate stats
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if(country.data[dateFormat]) {
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stats = country.data[dateFormat];
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country.ctotal += stats.cases;
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country.dtotal += stats.deaths;
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if(country.dtotal > covidData.maxDeaths) {
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covidData.maxDeaths = country.dtotal;
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covidData.maxDeathsCountry = ccode;
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}
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if(country.ctotal > covidData.maxCases) {
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covidData.maxCases = country.ctotal;
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covidData.maxCasesCountry = ccode;
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}
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stats.cgrow = country.ctotal;
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stats.dgrow = country.dtotal;
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countryCache[ccode] = stats;
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} else {
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// let's fill gaps
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country.data[dateFormat] = countryCache[ccode]
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}
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}
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// let's have total days so we can use it in range control
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covidData.totalDays += 1;
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}
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gid('date_range').max = covidData.totalDays - 1;
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console.log('total days', covidData.totalDays);
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//console.log(colors.steps);
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return covidData;
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}).then(function(covidData) {
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// initialize controls
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// console.log(covidData);
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var calcTimeout = -1;
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var autoPlayIntervalId = 0;
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var coronacases = gid('coronacases');
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var autoplay = function() {
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var value = parseInt(gid('date_range').value);
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if (value >= covidData.totalDays - 1) {
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value = 0;
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}
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// console.log(value);
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gid('date_range').value = value + 1;
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colorCountries(value);
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};
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var colorCountries = function(value) {
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var dt = new Date(covidData.start.year, covidData.start.month - 1, covidData.start.day);
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dt.setDate(dt.getDate() + parseInt(value));
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var dformat = dt.getFullYear()+"-"+(dt.getMonth()+1)+"-"+dt.getDate();
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gid('date_range_current').innerText = dformat;
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var colorStep = covidData.maxCases / colors.range;
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var coronaText = '';
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var coronaCountries = [];
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// console.log('color step', colorStep);
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var layer, country, stats, colorIndex, props;
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for(var ccode in countryLayer) {
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layer = countryLayer[ccode];
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country = covidData.country[ccode];
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if(country) {
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stats = country.data[dformat];
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if(stats && stats.cgrow > 0) {
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colorIndex = colors.gradientsCol[Math.ceil(stats.cgrow / colorStep)];
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layer.setStyle({
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fillColor: colorIndex,
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});
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props = layer.feature.properties;
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// lets create list of countries here
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coronaCountries.push({'code': ccode, 'cases': stats.cgrow, 'name': props.name});
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// console.log(ccode, stats, colorIndex);
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} else {
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layer.setStyle({
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fillColor: mapStyle.fillColor,
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});
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}
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//console.log(ccode, Math.floor(country.ctotal / colorStep));
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} else {
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layer.setStyle({
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fillColor: mapStyle.fillColor,
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});
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}
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}
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// now sort the countries and build the list control
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coronaCountries.sort(function(a, b) {
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if(a.cases > b.cases) {
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return -1;
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} else if (a.cases < b.cases) {
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return 1;
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}
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return 0;
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});
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coronaCountries.forEach(function(c) {
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coronaText += '<span><b>'+c.name+'</b> '+ c.cases +'</span><br />';
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})
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coronacases.innerHTML = coronaText;
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};
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var rangeValueChange = function(e) {
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clearTimeout(calcTimeout);
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clearInterval(autoPlayIntervalId);
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gid('autoplay_checkbox').checked = false;
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var value = e.target.value;
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calcTimeout = setTimeout(function() {
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colorCountries(value);
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}, 250);
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};
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var autoplayChange = function() {
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var checked = gid('autoplay_checkbox').checked;
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if(!checked) {
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clearInterval(autoPlayIntervalId);
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} else {
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autoPlayIntervalId = setInterval(autoplay, colors.autoplaySpeed);
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}
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// console.log(checked);
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}
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if(gid('autoplay_checkbox').checked) {
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autoPlayIntervalId = setInterval(autoplay, colors.autoplaySpeed);
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}
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// console.log(gid('date_range').max, gid('date_range').min, gid('date_range').value);
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gid('autoplay_checkbox').addEventListener('change', autoplayChange);
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gid('date_range').addEventListener('change', rangeValueChange);
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gid('date_range').addEventListener('input', rangeValueChange);
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return covidData;
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});
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})
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</script>
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</body>
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</html>
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