1 files changed, 133 insertions, 0 deletions
diff --git a/app/assets/javascripts/vue_shared/components/memory_graph.vue b/app/assets/javascripts/vue_shared/components/memory_graph.vue
new file mode 100644
index 00000000000..b07f6b07afe
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/memory_graph.vue
@@ -0,0 +1,133 @@
+<script>
+import { getTimeago } from '../../lib/utils/datetime_utility';
+
+export default {
+  name: 'MemoryGraph',
+  props: {
+    metrics: { type: Array, required: true },
+    deploymentTime: { type: Number, required: true },
+    width: { type: String, required: true },
+    height: { type: String, required: true },
+  },
+  data() {
+    return {
+      pathD: '',
+      pathViewBox: '',
+      dotX: '',
+      dotY: '',
+    };
+  },
+  computed: {
+    getFormattedMedian() {
+      const deployedSince = getTimeago().format(this.deploymentTime * 1000);
+      return `Deployed ${deployedSince}`;
+    },
+  },
+  mounted() {
+    this.renderGraph(this.deploymentTime, this.metrics);
+  },
+  methods: {
+    /**
+     * Returns metric value index in metrics array
+     * with timestamp closest to matching median
+     */
+    getMedianMetricIndex(median, metrics) {
+      let matchIndex = 0;
+      let timestampDiff = 0;
+      let smallestDiff = 0;
+
+      const metricTimestamps = metrics.map(v => v[0]);
+
+      // Find metric timestamp which is closest to deploymentTime
+      timestampDiff = Math.abs(metricTimestamps[0] - median);
+      metricTimestamps.forEach((timestamp, index) => {
+        if (index === 0) { // Skip first element
+          return;
+        }
+
+        smallestDiff = Math.abs(timestamp - median);
+        if (smallestDiff < timestampDiff) {
+          matchIndex = index;
+          timestampDiff = smallestDiff;
+        }
+      });
+
+      return matchIndex;
+    },
+
+    /**
+     * Get Graph Plotting values to render Line and Dot
+     */
+    getGraphPlotValues(median, metrics) {
+      const renderData = metrics.map(v => v[1]);
+      const medianMetricIndex = this.getMedianMetricIndex(median, metrics);
+      let cx = 0;
+      let cy = 0;
+
+      // Find Maximum and Minimum values from `renderData` array
+      const maxMemory = Math.max.apply(null, renderData);
+      const minMemory = Math.min.apply(null, renderData);
+
+      // Find difference between extreme ends
+      const diff = maxMemory - minMemory;
+      const lineWidth = renderData.length;
+
+      // Iterate over metrics values and perform following
+      // 1. Find x & y co-ords for deploymentTime's memory value
+      // 2. Return line path against maxMemory
+      const linePath = renderData.map((y, x) => {
+        if (medianMetricIndex === x) {
+          cx = x;
+          cy = maxMemory - y;
+        }
+        return `${x} ${maxMemory - y}`;
+      });
+
+      return {
+        pathD: linePath,
+        pathViewBox: {
+          lineWidth,
+          diff,
+        },
+        dotX: cx,
+        dotY: cy,
+      };
+    },
+
+    /**
+     * Render Graph based on provided median and metrics values
+     */
+    renderGraph(median, metrics) {
+      const { pathD, pathViewBox, dotX, dotY } = this.getGraphPlotValues(median, metrics);
+
+      // Set props and update graph on UI.
+      this.pathD = `M ${pathD}`;
+      this.pathViewBox = `0 0 ${pathViewBox.lineWidth} ${pathViewBox.diff}`;
+      this.dotX = dotX;
+      this.dotY = dotY;
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="memory-graph-container">
+    <svg
+      class="has-tooltip"
+      :title="getFormattedMedian"
+      :width="width"
+      :height="height"
+      xmlns="http://www.w3.org/2000/svg">
+      <path
+        :d="pathD"
+        :viewBox="pathViewBox"
+      />
+      <circle
+        r="1.5"
+        :cx="dotX"
+        :cy="dotY"
+        tranform="translate(0 -1)"
+      />
+    </svg>
+  </div>
+</template>