Remove jQuery from Download Graph

We may need to remove jQuery before enabling Fastboot.

Author: kzys

app/components/download-graph.js

@@ -1,22 +1,23 @@
 import Component from '@ember/component';
-import $ from 'jquery';
 
 // Colors by http://colorbrewer2.org/#type=diverging&scheme=RdBu&n=10
 const COLORS = ['#67001f', '#b2182b', '#d6604d', '#f4a582', '#92c5de', '#4393c3', '#2166ac', '#053061'];
 
 export default Component.extend({
     classNames: 'graph-data',
+    resizeHandler: undefined,
 
     didInsertElement() {
         this._super(...arguments);
 
-        $(window).on('resize.chart', () => this.rerender());
-        $(document).on('googleChartsLoaded', () => this.rerender());
+        this.resizeHandler = () => this.rerender();
+        window.addEventListener('resize', this.resizeHandler, false);
+        document.addEventListener('googleChartsLoaded', this.resizeHandler, false);
     },
 
     willDestroyElement() {
-        $(window).off('resize.chart');
-        $(document).off('googleChartsLoaded');
+        window.removeEventListener('resize', this.resizeHandler);
+        document.removeEventListener('googleChartsLoaded', this.resizeHandler);
     },
 
     didRender() {
@@ -69,12 +70,8 @@ export default Component.extend({
             }
         }
 
-        if (!data || !window.google || !window.googleChartsLoaded) {
-            this.$().hide();
-            return;
-        } else {
-            this.$().show();
-        }
+        let show = data && window.google && window.googleChartsLoaded;
+        this.element.style.display = show ? '' : 'none';
 
         let myData = window.google.visualization.arrayToDataTable(data);
 

app/components/google-jsapi.js

@@ -1,18 +1,25 @@
+/*global google*/
 import Component from '@ember/component';
-import $ from 'jquery';
+
+function createEvent(name) {
+    let event = document.createEvent('Event');
+    event.initEvent(name, true, true);
+    return event;
+}
 
 export default Component.extend({
     tagName: '',
 
     didInsertElement() {
-        $.getScript('https://www.google.com/jsapi', function() {
-            window.google.load('visualization', '1.0', {
-                packages: ['corechart'],
-                callback() {
-                    window.googleChartsLoaded = true;
-                    $(document).trigger('googleChartsLoaded');
-                },
+        let script = document.createElement('script');
+        script.onload = () => {
+            google.charts.load('current', { packages: ['corechart'] });
+            google.charts.setOnLoadCallback(() => {
+                window.googleChartsLoaded = true;
+                document.dispatchEvent(createEvent('googleChartsLoaded'));
             });
-        });
+        };
+        document.body.appendChild(script);
+        script.src = 'https://www.gstatic.com/charts/loader.js';
     },
 });