From 3ada7182f5f4b4a968e1fadc99932f18dac8a180 Mon Sep 17 00:00:00 2001
From: Gabe Kangas <gabek@real-ity.com>
Date: Mon, 13 Mar 2023 15:51:46 -0700
Subject: [PATCH] Update viewers chart y axis to make more sense. Closes #2806

---
 web/components/admin/Chart.tsx  | 15 ++++++++++++++-
 web/pages/admin/viewer-info.tsx |  9 ++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/web/components/admin/Chart.tsx b/web/components/admin/Chart.tsx
index ec7868bc8..dbdea0d50 100644
--- a/web/components/admin/Chart.tsx
+++ b/web/components/admin/Chart.tsx
@@ -11,6 +11,7 @@ import {
   Tooltip,
   Legend,
   LogarithmicScale,
+  ChartOptions,
 } from 'chart.js';
 import { Line } from 'react-chartjs-2';
 
@@ -40,6 +41,8 @@ export type ChartProps = {
   yFlipped?: boolean;
   yLogarithmic?: boolean;
   dataCollections?: any[];
+  minYValue?: number;
+  yStepSize?: number;
 };
 
 function createGraphDataset(dataArray) {
@@ -60,6 +63,8 @@ export const Chart: FC<ChartProps> = ({
   dataCollections,
   yFlipped,
   yLogarithmic,
+  minYValue,
+  yStepSize = 0,
 }) => {
   const renderData = [];
 
@@ -94,6 +99,10 @@ export const Chart: FC<ChartProps> = ({
       y: {
         type: yLogarithmic ? ('logarithmic' as const) : ('linear' as const),
         reverse: yFlipped,
+        min: minYValue,
+        ticks: {
+          stepSize: yStepSize,
+        },
         title: {
           display: true,
           text: unit,
@@ -104,7 +113,11 @@ export const Chart: FC<ChartProps> = ({
 
   return (
     <div className="line-chart-container">
-      <Line data={{ datasets: renderData }} options={options} height="70vh" />
+      <Line
+        data={{ datasets: renderData }}
+        options={options as ChartOptions<'line'>}
+        height="70vh"
+      />
     </div>
   );
 };
diff --git a/web/pages/admin/viewer-info.tsx b/web/pages/admin/viewer-info.tsx
index 9724af168..77efbe4cb 100644
--- a/web/pages/admin/viewer-info.tsx
+++ b/web/pages/admin/viewer-info.tsx
@@ -151,7 +151,14 @@ export default function ViewersOverTime() {
           </button>
         </Dropdown>
         {viewerInfo.length > 0 && (
-          <Chart title="Viewers" data={viewerInfo} color="#2087E2" unit="viewers" />
+          <Chart
+            title="Viewers"
+            data={viewerInfo}
+            color="#2087E2"
+            unit="viewers"
+            minYValue={0}
+            yStepSize={1}
+          />
         )}
 
         <ViewerTable data={viewerDetails} />