[Vislib] Use timestamp on brush event instead of iso dates

src/plugins/vis_type_vislib/public/vislib/lib/handler.js

@@ -9,6 +9,7 @@
 import d3 from 'd3';
 import _ from 'lodash';
 import MarkdownIt from 'markdown-it';
+import moment from 'moment';
 
 import { dispatchRenderComplete } from '../../../../kibana_utils/public';
 
@@ -26,6 +27,10 @@ const markdownIt = new MarkdownIt({
   linkify: true,
 });
 
+const convertToTimestamp = (dateString) => {
+  return parseInt(moment(dateString).format('x'));
+};
+
 /**
  * Handles building all the components of the visualization
  *
@@ -80,11 +85,13 @@ export class Handler {
           case 'brush':
             const xRaw = _.get(eventPayload.data, 'series[0].values[0].xRaw');
             if (!xRaw) return; // not sure if this is possible?
+            const [start, end] = eventPayload.range;
+            const range = [convertToTimestamp(start), convertToTimestamp(end)];
             return self.vis.emit(eventType, {
               name: 'brush',
               data: {
                 table: xRaw.table,
-                range: eventPayload.range,
+                range,
                 column: xRaw.column,
               },
             });