1 files changed, 144 insertions, 0 deletions
diff --git a/app/assets/javascripts/monitoring/components/graph/legend.vue b/app/assets/javascripts/monitoring/components/graph/legend.vue
new file mode 100644
index 00000000000..d08f9cbffd4
--- /dev/null
+++ b/app/assets/javascripts/monitoring/components/graph/legend.vue
@@ -0,0 +1,144 @@
+<script>
+  export default {
+    props: {
+      graphWidth: {
+        type: Number,
+        required: true,
+      },
+      graphHeight: {
+        type: Number,
+        required: true,
+      },
+      margin: {
+        type: Object,
+        required: true,
+      },
+      measurements: {
+        type: Object,
+        required: true,
+      },
+      areaColorRgb: {
+        type: String,
+        required: true,
+      },
+      legendTitle: {
+        type: String,
+        required: true,
+      },
+      yAxisLabel: {
+        type: String,
+        required: true,
+      },
+      metricUsage: {
+        type: String,
+        required: true,
+      },
+    },
+    data() {
+      return {
+        yLabelWidth: 0,
+        yLabelHeight: 0,
+      };
+    },
+    computed: {
+      textTransform() {
+        const yCoordinate = (((this.graphHeight - this.margin.top)
+                          + this.measurements.axisLabelLineOffset) / 2) || 0;
+
+        return `translate(15, ${yCoordinate}) rotate(-90)`;
+      },
+
+      rectTransform() {
+        const yCoordinate = ((this.graphHeight - this.margin.top) / 2)
+                            + (this.yLabelWidth / 2) + 10 || 0;
+
+        return `translate(0, ${yCoordinate}) rotate(-90)`;
+      },
+
+      xPosition() {
+        return (((this.graphWidth + this.measurements.axisLabelLineOffset) / 2)
+               - this.margin.right) || 0;
+      },
+
+      yPosition() {
+        return ((this.graphHeight - this.margin.top) + this.measurements.axisLabelLineOffset) || 0;
+      },
+    },
+    mounted() {
+      this.$nextTick(() => {
+        const bbox = this.$refs.ylabel.getBBox();
+        this.yLabelWidth = bbox.width + 10; // Added some padding
+        this.yLabelHeight = bbox.height + 5;
+      });
+    },
+  };
+</script>
+<template>
+  <g
+    class="axis-label-container">
+    <line
+      class="label-x-axis-line"
+      stroke="#000000"
+      stroke-width="1"
+      x1="10"
+      :y1="yPosition"
+      :x2="graphWidth + 20"
+      :y2="yPosition">
+    </line>
+    <line
+      class="label-y-axis-line"
+      stroke="#000000"
+      stroke-width="1"
+      x1="10"
+      y1="0"
+      :x2="10"
+      :y2="yPosition">
+    </line>
+    <rect
+      class="rect-axis-text"
+      :transform="rectTransform"
+      :width="yLabelWidth"
+      :height="yLabelHeight">
+    </rect>
+    <text
+      class="label-axis-text y-label-text"
+      text-anchor="middle"
+      :transform="textTransform"
+      ref="ylabel">
+      {{yAxisLabel}}
+    </text>
+    <rect
+      class="rect-axis-text"
+      :x="xPosition + 60"
+      :y="graphHeight - 80"
+      width="35"
+      height="50">
+    </rect>
+    <text
+      class="label-axis-text x-label-text"
+      :x="xPosition + 60"
+      :y="yPosition"
+      dy=".35em">
+      Time
+    </text>
+    <rect
+      :fill="areaColorRgb"
+      :width="measurements.legends.width"
+      :height="measurements.legends.height"
+      x="20"
+      :y="graphHeight - measurements.legendOffset">
+    </rect>
+    <text
+      class="text-metric-title"
+      x="50"
+      :y="graphHeight - 25">
+      {{legendTitle}}
+    </text>
+    <text
+      class="text-metric-usage"
+      x="50"
+      :y="graphHeight - 10">
+      {{metricUsage}}
+    </text>
+  </g>
+</template>