Add timezone format to the stacked column chart

- Add formatting from options
- Add prop to receive format information

app/assets/javascripts/monitoring/components/charts/options.js

@@ -21,6 +21,21 @@ const chartGridLeft = 75;
 
 // Axis options
 
+/**
+ * Axis types
+ * @see https://echarts.apache.org/en/option.html#xAxis.type
+ */
+export const axisTypes = {
+  /**
+   * Category axis, suitable for discrete category data.
+   */
+  category: 'category',
+  /**
+   *  Time axis, suitable for continuous time series data.
+   */
+  time: 'time',
+};
+
 /**
  * Converts .yml parameters to echarts axis options for data axis
  * @param {Object} param - Dashboard .yml definition options
@@ -61,7 +76,7 @@ export const getYAxisOptions = ({
 
 export const getTimeAxisOptions = ({ timezone = timezones.LOCAL } = {}) => ({
   name: __('Time'),
-  type: 'time',
+  type: axisTypes.time,
   axisLabel: {
     formatter: date => formatDate(date, { format: formats.shortTime, timezone }),
   },

app/assets/javascripts/monitoring/components/charts/stacked_column.vue

@@ -4,6 +4,8 @@ import { GlStackedColumnChart } from '@gitlab/ui/dist/charts';
 import { getSvgIconPathContent } from '~/lib/utils/icon_utils';
 import { chartHeight } from '../../constants';
 import { graphDataValidatorForValues } from '../../utils';
+import { getTimeAxisOptions, axisTypes } from './options';
+import { timezones } from '../../format_date';
 
 export default {
   components: {
@@ -18,6 +20,11 @@ export default {
       required: true,
       validator: graphDataValidatorForValues.bind(null, false),
     },
+    timezone: {
+      type: String,
+      required: false,
+      default: timezones.LOCAL,
+    },
   },
   data() {
     return {
@@ -28,7 +35,14 @@ export default {
   },
   computed: {
     chartData() {
-      return this.graphData.metrics.map(metric => metric.result[0].values.map(val => val[1]));
+      return this.graphData.metrics.map(({ result }) => {
+        // This needs a fix. Not only metrics[0] should be shown.
+        // See https://gitlab.com/gitlab-org/gitlab/-/issues/220492
+        if (!result || result.length === 0) {
+          return [];
+        }
+        return result[0].values.map(val => val[1]);
+      });
     },
     xAxisTitle() {
       return this.graphData.x_label !== undefined ? this.graphData.x_label : '';
@@ -37,10 +51,17 @@ export default {
       return this.graphData.y_label !== undefined ? this.graphData.y_label : '';
     },
     xAxisType() {
-      return this.graphData.x_type !== undefined ? this.graphData.x_type : 'category';
+      // stacked-column component requires the x-axis to be of type `category`
+      return axisTypes.category;
     },
     groupBy() {
-      return this.graphData.metrics[0].result[0].values.map(val => val[0]);
+      // This needs a fix. Not only metrics[0] should be shown.
+      // See https://gitlab.com/gitlab-org/gitlab/-/issues/220492
+      const { result } = this.graphData.metrics[0];
+      if (!result || result.length === 0) {
+        return [];
+      }
+      return result[0].values.map(val => val[0]);
     },
     dataZoomConfig() {
       const handleIcon = this.svgs['scroll-handle'];
@@ -49,11 +70,15 @@ export default {
     },
     chartOptions() {
       return {
-        dataZoom: this.dataZoomConfig,
+        xAxis: {
+          ...getTimeAxisOptions({ timezone: this.timezone }),
+          type: this.xAxisType,
+        },
+        dataZoom: [this.dataZoomConfig],
       };
     },
     seriesNames() {
-      return this.graphData.metrics.map(metric => metric.series_name);
+      return this.graphData.metrics.map(metric => metric.label);
     },
   },
   created() {

changelogs/unreleased/219210-stacked-column-date-format.yml

+---
+title: Add date time format to the monitor stacked-column chart
+merge_request: 33814
+author:
+type: changed

spec/frontend/monitoring/components/charts/stacked_column_spec.js

 import { shallowMount } from '@vue/test-utils';
+import timezoneMock from 'timezone-mock';
+import { cloneDeep } from 'lodash';
 import { GlStackedColumnChart } from '@gitlab/ui/dist/charts';
 import StackedColumnChart from '~/monitoring/components/charts/stacked_column.vue';
 import { stackedColumnMockedData } from '../../mock_data';
 
 jest.mock('~/lib/utils/icon_utils', () => ({
-  getSvgIconPathContent: jest.fn().mockResolvedValue('mockSvgPathContent'),
+  getSvgIconPathContent: jest.fn().mockImplementation(icon => Promise.resolve(`${icon}-content`)),
 }));
 
 describe('Stacked column chart component', () => {
   let wrapper;
-  const glStackedColumnChart = () => wrapper.find(GlStackedColumnChart);
+  const findChart = () => wrapper.find(GlStackedColumnChart);
 
-  beforeEach(() => {
+  const createWrapper = (props = {}) => {
     wrapper = shallowMount(StackedColumnChart, {
       propsData: {
         graphData: stackedColumnMockedData,
+        ...props,
+      },
+    });
+  };
+
+  describe('when graphData is present', () => {
+    beforeEach(() => {
+      createWrapper();
+      return wrapper.vm.$nextTick();
+    });
+
+    it('chart is rendered', () => {
+      expect(findChart().exists()).toBe(true);
+    });
+
+    it('data should match the graphData y value for each series', () => {
+      const data = findChart().props('data');
+
+      data.forEach((series, index) => {
+        const { values } = stackedColumnMockedData.metrics[index].result[0];
+        expect(series).toEqual(values.map(value => value[1]));
+      });
+    });
+
+    it('series names should be the same as the graphData metrics labels', () => {
+      const seriesNames = findChart().props('seriesNames');
+
+      expect(seriesNames).toHaveLength(stackedColumnMockedData.metrics.length);
+      seriesNames.forEach((name, index) => {
+        expect(stackedColumnMockedData.metrics[index].label).toBe(name);
+      });
+    });
+
+    it('group by should be the same as the graphData first metric results', () => {
+      const groupBy = findChart().props('groupBy');
+
+      expect(groupBy).toEqual([
+        '2020-01-30T12:00:00.000Z',
+        '2020-01-30T12:01:00.000Z',
+        '2020-01-30T12:02:00.000Z',
+      ]);
+    });
+
+    it('chart options should configure data zoom and axis label ', () => {
+      const chartOptions = findChart().props('option');
+      const xAxisType = findChart().props('xAxisType');
+
+      expect(chartOptions).toMatchObject({
+        dataZoom: [{ handleIcon: 'path://scroll-handle-content' }],
+        xAxis: {
+          axisLabel: { formatter: expect.any(Function) },
         },
       });
+
+      expect(xAxisType).toBe('category');
     });
 
-  afterEach(() => {
-    wrapper.destroy();
+    it('chart options should configure category as x axis type', () => {
+      const chartOptions = findChart().props('option');
+      const xAxisType = findChart().props('xAxisType');
+
+      expect(chartOptions).toMatchObject({
+        xAxis: {
+          type: 'category',
+        },
+      });
+      expect(xAxisType).toBe('category');
     });
 
-  describe('with graphData present', () => {
-    it('is a Vue instance', () => {
-      expect(glStackedColumnChart().exists()).toBe(true);
+    it('format date is correct', () => {
+      const { xAxis } = findChart().props('option');
+      expect(xAxis.axisLabel.formatter('2020-01-30T12:01:00.000Z')).toBe('12:01 PM');
     });
 
-    it('should contain the same number of elements in the seriesNames computed prop as the graphData metrics prop', () =>
-      wrapper.vm
-        .$nextTick()
-        .then(expect(wrapper.vm.seriesNames).toHaveLength(stackedColumnMockedData.metrics.length)));
+    describe('when in PT timezone', () => {
+      beforeAll(() => {
+        timezoneMock.register('US/Pacific');
+      });
 
-    it('should contain the same number of elements in the groupBy computed prop as the graphData result prop', () =>
-      wrapper.vm
-        .$nextTick()
-        .then(
-          expect(wrapper.vm.groupBy).toHaveLength(
-            stackedColumnMockedData.metrics[0].result[0].values.length,
-          ),
-        ));
+      afterAll(() => {
+        timezoneMock.unregister();
+      });
+
+      it('date is shown in local time', () => {
+        const { xAxis } = findChart().props('option');
+        expect(xAxis.axisLabel.formatter('2020-01-30T12:01:00.000Z')).toBe('4:01 AM');
+      });
+
+      it('date is shown in UTC', () => {
+        wrapper.setProps({ timezone: 'UTC' });
+
+        return wrapper.vm.$nextTick().then(() => {
+          const { xAxis } = findChart().props('option');
+          expect(xAxis.axisLabel.formatter('2020-01-30T12:01:00.000Z')).toBe('12:01 PM');
+        });
+      });
+    });
+  });
+
+  describe('when graphData has results missing', () => {
+    beforeEach(() => {
+      const graphData = cloneDeep(stackedColumnMockedData);
+
+      graphData.metrics[0].result = null;
+
+      createWrapper({ graphData });
+      return wrapper.vm.$nextTick();
+    });
+
+    it('chart is rendered', () => {
+      expect(findChart().exists()).toBe(true);
+    });
   });
 });

spec/frontend/monitoring/mock_data.js

@@ -467,9 +467,9 @@ export const stackedColumnMockedData = {
         {
           metric: {},
           values: [
-            ['2020-01-30 12:00:00', '5'],
-            ['2020-01-30 12:01:00', '10'],
-            ['2020-01-30 12:02:00', '15'],
+            ['2020-01-30T12:00:00.000Z', '5'],
+            ['2020-01-30T12:01:00.000Z', '10'],
+            ['2020-01-30T12:02:00.000Z', '15'],
           ],
         },
       ],
@@ -485,9 +485,9 @@ export const stackedColumnMockedData = {
         {
           metric: {},
           values: [
-            ['2020-01-30 12:00:00', '20'],
-            ['2020-01-30 12:01:00', '25'],
-            ['2020-01-30 12:02:00', '30'],
+            ['2020-01-30T12:00:00.000Z', '20'],
+            ['2020-01-30T12:01:00.000Z', '25'],
+            ['2020-01-30T12:02:00.000Z', '30'],
           ],
         },
       ],