From 0765c8a13886147d160ac4f585d010cf1ba89498 Mon Sep 17 00:00:00 2001
From: Jose Vargas <jvargas@gitlab.com>
Date: Fri, 9 Aug 2019 15:59:05 -0500
Subject: Add support for stacked column charts

This adds support for stacked column charts inside
the monitoring dashboard
---
 .../components/charts/stacked_column.vue           | 109 +++++++++++++++++++++
 .../monitoring/components/panel_type.vue           |  30 ++++++
 .../monitoring/charts/stacked_column_spec.js       |  27 +++++
 3 files changed, 166 insertions(+)
 create mode 100644 app/assets/javascripts/monitoring/components/charts/stacked_column.vue
 create mode 100644 spec/javascripts/monitoring/charts/stacked_column_spec.js

diff --git a/app/assets/javascripts/monitoring/components/charts/stacked_column.vue b/app/assets/javascripts/monitoring/components/charts/stacked_column.vue
new file mode 100644
index 00000000000..348dd52c904
--- /dev/null
+++ b/app/assets/javascripts/monitoring/components/charts/stacked_column.vue
@@ -0,0 +1,109 @@
+<script>
+import { GlStackedColumnChart } from '@gitlab/ui/dist/charts';
+import { getSvgIconPathContent } from '~/lib/utils/icon_utils';
+import { chartHeight } from '../../constants';
+import { graphDataValidatorForValues } from '../../utils';
+
+export default {
+  components: {
+    GlStackedColumnChart,
+  },
+  props: {
+    graphData: {
+      type: Object,
+      required: true,
+      validator: graphDataValidatorForValues.bind(null, false),
+    },
+    containerWidth: {
+      type: Number,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      width: 0,
+      height: chartHeight,
+      svgs: {},
+    };
+  },
+  computed: {
+    chartData() {
+      // TODO: Process this data from the graphData prop
+      return [
+        [58, 49, 38, 23, 27, 68, 38, 35, 7, 64, 65, 31],
+        [8, 6, 34, 19, 9, 7, 17, 25, 14, 7, 10, 32],
+        [67, 60, 66, 32, 61, 54, 13, 50, 16, 11, 47, 28],
+        [8, 9, 5, 40, 13, 19, 58, 21, 47, 59, 23, 46],
+      ];
+    },
+    xAxisTitle() {
+      return this.graphData.queries[0].result[0].x_label !== undefined
+        ? this.graphData.queries[0].result[0].x_label
+        : '';
+    },
+    yAxisTitle() {
+      return this.graphData.queries[0].result[0].y_label !== undefined
+        ? this.graphData.queries[0].result[0].y_label
+        : '';
+    },
+    xAxisType() {
+      return this.graphData.x_type !== undefined ? this.graphData.x_type : 'category';
+    },
+    groupBy() {
+      // TODO: Process this data from the graphData prop
+      // eslint-disable-next-line @gitlab/i18n/no-non-i18n-strings
+      return ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
+    },
+    dataZoomConfig() {
+      const handleIcon = this.svgs['scroll-handle'];
+
+      return handleIcon ? { handleIcon } : {};
+    },
+    chartOptions() {
+      return {
+        dataZoom: this.dataZoomConfig,
+      };
+    },
+    seriesNames() {
+      // TODO: Process this data from the graphData prop
+      // eslint-disable-next-line @gitlab/i18n/no-non-i18n-strings
+      return ['Fun 1', 'Fun 2', 'Fun 3', 'Fun 4'];
+    },
+  },
+  created() {
+    this.setSvg('scroll-handle');
+  },
+  methods: {
+    setSvg(name) {
+      getSvgIconPathContent(name)
+        .then(path => {
+          if (path) {
+            this.$set(this.svgs, name, `path://${path}`);
+          }
+        })
+        .catch(() => {});
+    },
+  },
+};
+</script>
+<template>
+  <div class="prometheus-graph col-12 col-lg-6">
+    <div class="prometheus-graph-header">
+      <h5 ref="graphTitle" class="prometheus-graph-title">{{ graphData.title }}</h5>
+      <div ref="graphWidgets" class="prometheus-graph-widgets"><slot></slot></div>
+    </div>
+    <gl-stacked-column-chart
+      ref="stackedColumnChart"
+      v-bind="$attrs"
+      :data="chartData"
+      :option="chartOptions"
+      :x-axis-title="xAxisTitle"
+      :y-axis-title="yAxisTitle"
+      :x-axis-type="xAxisType"
+      :group-by="groupBy"
+      :width="width"
+      :height="height"
+      :series-names="seriesNames"
+    />
+  </div>
+</template>
diff --git a/app/assets/javascripts/monitoring/components/panel_type.vue b/app/assets/javascripts/monitoring/components/panel_type.vue
index 96f62bc85ee..fc8f461fd2f 100644
--- a/app/assets/javascripts/monitoring/components/panel_type.vue
+++ b/app/assets/javascripts/monitoring/components/panel_type.vue
@@ -12,12 +12,14 @@ import {
 import Icon from '~/vue_shared/components/icon.vue';
 import MonitorAreaChart from './charts/area.vue';
 import MonitorSingleStatChart from './charts/single_stat.vue';
+import MonitorStackedColumnChart from './charts/stacked_column.vue';
 import MonitorEmptyChart from './charts/empty_chart.vue';
 
 export default {
   components: {
     MonitorAreaChart,
     MonitorSingleStatChart,
+    MonitorStackedColumnChart,
     MonitorEmptyChart,
     Icon,
     GlDropdown,
@@ -92,6 +94,34 @@ export default {
     v-if="isPanelType('single-stat') && graphDataHasMetrics"
     :graph-data="graphData"
   />
+  <monitor-stacked-column-chart
+    v-else-if="isPanelType('stacked-column') && graphDataHasMetrics"
+    :graph-data="graphData"
+    :container-width="dashboardWidth"
+  >
+    <gl-dropdown
+      v-gl-tooltip
+      class="mx-2"
+      toggle-class="btn btn-transparent border-0"
+      :right="true"
+      :no-caret="true"
+      :title="__('More actions')"
+    >
+      <template slot="button-content">
+        <icon name="ellipsis_v" class="text-secondary" />
+      </template>
+      <gl-dropdown-item :href="downloadCsv" download="chart_metrics.csv">
+        {{ __('Download CSV') }}
+      </gl-dropdown-item>
+      <gl-dropdown-item
+        class="js-chart-link"
+        :data-clipboard-text="clipboardText"
+        @click="showToast"
+      >
+        {{ __('Generate link to chart') }}
+      </gl-dropdown-item>
+    </gl-dropdown>
+  </monitor-stacked-column-chart>
   <monitor-area-chart
     v-else-if="graphDataHasMetrics"
     :graph-data="graphData"
diff --git a/spec/javascripts/monitoring/charts/stacked_column_spec.js b/spec/javascripts/monitoring/charts/stacked_column_spec.js
new file mode 100644
index 00000000000..6b120bddafa
--- /dev/null
+++ b/spec/javascripts/monitoring/charts/stacked_column_spec.js
@@ -0,0 +1,27 @@
+import { shallowMount } from '@vue/test-utils';
+import StackedColumnChart from '~/monitoring/components/charts/stacked_column.vue';
+import { graphDataPrometheusQueryRange } from '../mock_data';
+
+describe('Stacked column chart component', () => {
+  let stackedColumnChart;
+  const containerWidth = 200;
+
+  beforeEach(() => {
+    stackedColumnChart = shallowMount(StackedColumnChart, {
+      propsData: {
+        graphData: graphDataPrometheusQueryRange,
+        containerWidth,
+      },
+    })
+  });
+
+  afterEach(() => {
+    stackedColumnChart.destroy();
+  });
+
+  describe('with graphData present', () => {
+    it('chartData should return an array of arrays', () => {
+      expect(stackedColumnChart.vm.chartData.length).toBe(4);
+    });
+  });
+});
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