IW4M-Admin/Admin/webfront/stats.html

<div id="stats">
    <div id="stats-info">
        <input type="range" min="1" max="1000" value="100" class="slider" id="KillEventCount">
        <label for="KillEventCount">Showing 100 Kills</label>
    </div> 
</div>

<script>
    var killsList = [];
    var refreshInterval = 250;

    function drawCircle(context, x, y, color) {
        context.beginPath();
        context.arc(x, y, 3.5, 0, 2 * Math.PI, false);
        context.fillStyle = color;
        context.fill();
        context.lineWidth = 0.5;
        context.strokeStyle = 'rgba(255, 255, 255, 0.5)';
        context.stroke();
    }

    function drawLine(context, x1, y1, x2, y2, color) {
        context.beginPath();
        context.lineWidth = '1';

        var grad = context.createLinearGradient(x1, y1, x2, y2);
        grad.addColorStop(0, 'rgba(0, 255, 0, 0.75)');
        grad.addColorStop(0.75, 'rgba(223, 66, 244, 0.8)');
        context.strokeStyle = grad;

        context.moveTo(x1, y1);
        context.lineTo(x2, y2);
        context.stroke();
    }

    function clearCanvas(canvas) {
        var context = canvas[0].getContext("2d");
        context.clearRect(0, 0, context.canvas.width, context.canvas.height);
    }

    function checkCanvasSize(canvas, context, minimap, minimapInfo) {
        var height = minimap.height() - minimapInfo.Top - minimapInfo.Bottom;
        var width = minimap.width() - minimapInfo.Left - minimapInfo.Right;

        if (context.canvas.height != height || context.canvas.width != width) {
            context.canvas.height = height;
            context.canvas.width = width;

            canvas.css('position', 'absolute');
            canvas.css('left', minimapInfo.Left + minimap.offset().left);
            canvas.css('top', minimapInfo.Top + minimap.offset().top);
        }
    }

    function drawKill(opacity, canvas, server, kill) {
        var context = canvas[0].getContext("2d");
        var minimapInfo = server.Minimap[0];

        var calcX1 = (minimapInfo.MaxLeft - kill.KillOrigin.Y) / (minimapInfo.Width / canvas.width());
        var calcY1 = (minimapInfo.MaxTop - kill.KillOrigin.X) / (minimapInfo.Height / canvas.height());

        var calcX2 = (minimapInfo.MaxLeft - kill.DeathOrigin.Y) / (minimapInfo.Width / canvas.width());
        var calcY2 = (minimapInfo.MaxTop - kill.DeathOrigin.X) / (minimapInfo.Height / canvas.height());

        drawCircle(context, calcX1, calcY1, 'rgba(0, 122, 204, ' + opacity + ')');
        drawLine(context, calcX1, calcY1, calcX2, calcY2, 'rgba(0, 255, 0, 0.1)');
        drawCircle(context, calcX2, calcY2, 'rgba(255, 0, 0, ' + opacity + ')');
    }

    function loadKills() {
        $.getJSON("/_killstats?count=" + $('#KillEventCount').val(), function (result) {

            $.each(result.Servers, function (i, server) {

                if (server.Minimap.length == 0) {
                    //console.log("missing minimap data for " + server.ServerName);
                    return true;
                }

                if ($('#minimap-overlay-' + i).length == 0) {
                    var html = '<div style="clear: both;"></div><div id="stats-container-' + i + '"><div class="stats-minimap-container" id="stats-minimap-' + i + '"><h2 class="datThing">' + server.ServerName + '</h2><img class="stats-minimap-image" src="/webfront/images/minimap_' + server.Minimap[0].MapName + '.png" /> </div>';
                    html += '<div class="stats-serverinfo"></div><canvas id="minimap-overlay-' + i + '"></canvas></div>';
                    $('#stats').append(html);
                }

                server.MapKills = server.MapKills.reverse();

                var newKills = [];
                var oldKills = [];
                if (killsList[i] != undefined) {
                    newKills = server.MapKills.filter(x => killsList[i].filter(x2 => x2.ID == x.ID).length == 0);
                    oldKills = server.MapKills.filter(x => newKills.findIndex(x2 => x2.ID == x.ID) === -1);
                }

                killsList[i] = server.MapKills;

                var canvas = $('#minimap-overlay-' + i);
                var minimap = $('#stats-minimap-' + i + ' img');

                clearCanvas(canvas);
                checkCanvasSize(canvas, canvas[0].getContext("2d"), minimap, server.Minimap[0]);

                var furthestKill = 0;

                $.each(newKills, function (i, kill) {
                    if (kill.Distance > furthestKill)
                        furthestKill = kill.Distance;
                    drawKill('1', canvas, server, kill);
                });

                $.each(oldKills, function (i, kill) {
                    if (kill.Distance > furthestKill)
                        furthestKill = kill.Distance;
                    drawKill('0.35', canvas, server, kill);
                });

                var html = '<span>' + server.ServerInfo.Uptime + ' of uptime</span><br/><span>Round started ' + server.ServerInfo.ElapsedRoundTime + '</span><br/>';
                html += '<span>Furthest kill from ' + Math.round(furthestKill * 10) / 10 + ' meters</span><br/>';
                if (newKills.length > 0) {
                    if (newKills[0].KillerPlayer != null)
                        html += '<span class="last-kill">' + newKills[0].KillerPlayer + ' killed ' + newKills[0].VictimPlayer + '</span><br/>';
                    else
                        html += `<span class="last-kill">Kill information pulled from database</span><br/>`;
                }
                else
                    html += '<span class="last-kill">' + $('#stats-container-' + i).find('.last-kill').text() + '</span><br/>';
                $('#stats-container-' + i + ' .stats-serverinfo').html(html);

            });
        });

        setTimeout(loadKills, refreshInterval)
    }

    $(document).ready(function () {
        $('#KillEventCount').on('input change', function () {
            $(this).next().text('Showing ' + $(this).val() + ' Kills');
            if ($(this).val() > 300)
                refreshInterval = 500;
            else
                refreshInterval = 250;
        });

        loadKills();
    });
</script>