From 2a66cac2308ad5fd8f74544c96ffe793ea2d9310 Mon Sep 17 00:00:00 2001
From: Pedro Henrique Ribeiro Freitas
 <pedroribeiro@lntb-tel114368.network.ctbc>
Date: Wed, 28 Sep 2016 16:42:24 -0300
Subject: [PATCH] new function percentil

---
 src/datasource-zabbix/DataProcessor.js   | 27 ++++++++++++++++++++++++
 src/datasource-zabbix/metricFunctions.js | 10 +++++++++
 2 files changed, 37 insertions(+)

diff --git a/src/datasource-zabbix/DataProcessor.js b/src/datasource-zabbix/DataProcessor.js
index cb6c4c2..736d169 100644
--- a/src/datasource-zabbix/DataProcessor.js
+++ b/src/datasource-zabbix/DataProcessor.js
@@ -158,6 +158,32 @@ export default class DataProcessor {
     return timeseries;
   }
 
+  static PERCENTIL(interval, n, datapoints) {
+    var flattenedPoints = _.flatten(datapoints, true);
+    var ms_interval = utils.parseInterval(interval);
+
+    // Calculate frame timestamps
+    var frames = _.groupBy(flattenedPoints, function(point) {
+      // Calculate time for group of points
+      return Math.floor(point[1] / ms_interval) * ms_interval;
+    });
+
+    // frame: { '<unixtime>': [[<value>, <unixtime>], ...] }
+    // return [{ '<unixtime>': <value> }, { '<unixtime>': <value> }, ...]
+    var grouped = _.mapValues(frames, function(frame) {
+      var points = _.map(frame, function(point) {
+        return point[0];
+      });
+      var sorted = _.sortBy(points);
+      return sorted[Math.floor(sorted.length*n/100)];
+    });
+
+    // Convert points to Grafana format
+    return sortByTime(_.map(grouped, function(value, timestamp) {
+      return [Number(value), Number(timestamp)];
+    }));
+  }
+
   static scale(factor, datapoints) {
     return _.map(datapoints, point => {
       return [
@@ -208,6 +234,7 @@ export default class DataProcessor {
       groupBy: this.groupByWrapper,
       scale: this.scale,
       delta: this.delta,
+      percentil: this.PERCENTIL,
       aggregateBy: this.aggregateByWrapper,
       average: _.partial(this.aggregateWrapper, this.AVERAGE),
       min: _.partial(this.aggregateWrapper, this.MIN),
diff --git a/src/datasource-zabbix/metricFunctions.js b/src/datasource-zabbix/metricFunctions.js
index 5d467f4..c40259c 100644
--- a/src/datasource-zabbix/metricFunctions.js
+++ b/src/datasource-zabbix/metricFunctions.js
@@ -72,6 +72,16 @@ addFuncDef({
   defaultParams: ['1m'],
 });
 
+addFuncDef({
+  name: 'percentil',
+  category: 'Aggregate',
+  params: [
+    { name: 'interval', type: 'string' },
+    { name: 'percent', type: 'string' }
+  ],
+  defaultParams: ['1m','95'],
+});
+
 addFuncDef({
   name: 'min',
   category: 'Aggregate',