Server Preference Pie creation

Plan/src/main/java/com/djrapitops/plan/utilities/html/graphs/ServerPreferencePieCreator.java

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+package main.java.com.djrapitops.plan.utilities.html.graphs;
+
+import java.util.Map;
+
+public class ServerPreferencePieCreator {
+
+    private ServerPreferencePieCreator() {
+        throw new IllegalStateException("Utility Class");
+    }
+
+    public static String createSeriesData(Map<String, Long> serverPlaytimes) {
+        StringBuilder seriesBuilder = new StringBuilder("[");
+        int i = 0;
+        int size = serverPlaytimes.size();
+        for (Map.Entry<String, Long> server : serverPlaytimes.entrySet()) {
+            String serverName = server.getKey();
+            seriesBuilder.append("{name:'").append(serverName)
+                    .append("',y:").append(server.getValue()).append("'");
+
+            seriesBuilder.append("}");
+            if (i < size - 1) {
+                seriesBuilder.append(",");
+            }
+            i++;
+        }
+        seriesBuilder.append("]");
+
+        return seriesBuilder.toString();
+    }
+}

Plan/src/main/resources/js/serverPie.js

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+function serverPie(id, serverSeries) {
+    Highcharts.chart(id, {
+        chart: {
+            plotBackgroundColor: null,
+            plotBorderWidth: null,
+            plotShadow: false,
+            type: 'pie'
+        },
+        title: {text: ''},
+        plotOptions: {
+            pie: {
+              allowPointSelect: true,
+              cursor: 'pointer',
+              dataLabels: {
+                enabled: false
+              },
+              showInLegend: true
+            }
+        },
+        tooltip: {
+            formatter: function() {
+                return '<b>'+this.point.name+':</b> ' + formatTimeAmount(this.y) + ' ('+this.percentage.toFixed(2)+'%)';
+            }
+        },
+        series: [serverSeries]
+    });
+}
+
+function formatTimeAmount(ms) {
+    var out = "";
+
+    var seconds = Math.floor(ms / 1000);
+
+    var dd = Math.floor(seconds / 86400);
+    seconds -= (dd * 86400);
+    var dh = Math.floor(seconds / 3600);
+    seconds -= (dh * 3600);
+    var dm = Math.floor(seconds / 60);
+    seconds -= (dm * 60);
+    seconds = Math.floor(seconds);
+    if (dd !== 0) {
+        out += dd.toString() + "d ";
+    }
+    if (dh !== 0) {
+        out += dh.toString() + "h ";
+    }
+    if (dm !== 0) {
+        out += dm.toString() + "m ";
+    }
+    out += seconds.toString() + "s ";
+
+    return out;
+}