From 1609ab3d388e81e7957f9d7cd0c7a778ab63eac0 Mon Sep 17 00:00:00 2001
From: Matt Walsh <github@netbymatt.com>
Date: Fri, 23 May 2025 22:14:48 -0500
Subject: [PATCH] radar host overrides

---
 .eslintrc                        |  3 ++-
 gulp/publish-frontend.mjs        |  4 +++-
 index.mjs                        |  2 ++
 server/scripts/modules/radar.mjs |  6 ++++--
 src/overrides.mjs                | 10 ++++++++++
 views/index.ejs                  |  5 ++++-
 6 files changed, 25 insertions(+), 5 deletions(-)
 create mode 100644 src/overrides.mjs

diff --git a/.eslintrc b/.eslintrc
index 90c8555..f468c66 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -12,7 +12,8 @@
 		"RegionalCities": "readonly",
 		"StationInfo": "readonly",
 		"SunCalc": "readonly",
-		"NoSleep": "readonly"
+		"NoSleep": "readonly",
+		"OVERRIDES": "readonly"
 	},
 	"parserOptions": {
 		"ecmaVersion": "latest",
diff --git a/gulp/publish-frontend.mjs b/gulp/publish-frontend.mjs
index 044ae81..0dbc0eb 100644
--- a/gulp/publish-frontend.mjs
+++ b/gulp/publish-frontend.mjs
@@ -14,9 +14,10 @@ import webpack from 'webpack-stream';
 import TerserPlugin from 'terser-webpack-plugin';
 import { readFile } from 'fs/promises';
 import file from 'gulp-file';
+import { CloudFrontClient, CreateInvalidationCommand } from '@aws-sdk/client-cloudfront';
+import OVERRIDES from '../src/overrides.mjs';
 
 // get cloudfront
-import { CloudFrontClient, CreateInvalidationCommand } from '@aws-sdk/client-cloudfront';
 import reader from '../src/playlist-reader.mjs';
 
 const clean = () => deleteAsync(['./dist/**/*', '!./dist/readme.txt']);
@@ -113,6 +114,7 @@ const compressHtml = async () => {
 		.pipe(ejs({
 			production: version,
 			version,
+			OVERRIDES,
 		}))
 		.pipe(rename({ extname: '.html' }))
 		.pipe(htmlmin({ collapseWhitespace: true }))
diff --git a/index.mjs b/index.mjs
index 40c3a7c..4ca315e 100644
--- a/index.mjs
+++ b/index.mjs
@@ -5,6 +5,7 @@ import corsPassThru from './cors/index.mjs';
 import radarPassThru from './cors/radar.mjs';
 import outlookPassThru from './cors/outlook.mjs';
 import playlist from './src/playlist.mjs';
+import OVERRIDES from './src/overrides.mjs';
 
 const app = express();
 const port = process.env.WS4KP_PORT ?? 8080;
@@ -57,6 +58,7 @@ const index = (req, res) => {
 	res.render('index', {
 		production: false,
 		version,
+		OVERRIDES,
 	});
 };
 
diff --git a/server/scripts/modules/radar.mjs b/server/scripts/modules/radar.mjs
index f8fb61a..dda0e53 100644
--- a/server/scripts/modules/radar.mjs
+++ b/server/scripts/modules/radar.mjs
@@ -8,6 +8,7 @@ import WeatherDisplay from './weatherdisplay.mjs';
 import { registerDisplay, timeZone } from './navigation.mjs';
 import * as utils from './radar-utils.mjs';
 
+const RADAR_HOST = 'mesonet.agron.iastate.edu';
 class Radar extends WeatherDisplay {
 	constructor(navId, elemId) {
 		super(navId, elemId, 'Local Radar', true);
@@ -55,7 +56,7 @@ class Radar extends WeatherDisplay {
 		const src = 'images/maps/radar.webp';
 		this.baseMap = await loadImg(src);
 
-		const baseUrl = 'https://mesonet.agron.iastate.edu/archive/data/';
+		const baseUrl = `https://${RADAR_HOST}/archive/data/`;
 		const baseUrlEnd = '/GIS/uscomp/?F=0&P=n0r*.png';
 		const baseUrls = [];
 		let date = DateTime.utc().minus({ days: 1 }).startOf('day');
@@ -134,7 +135,8 @@ class Radar extends WeatherDisplay {
 			workingContext.imageSmoothingEnabled = false;
 
 			// get the image
-			const response = await fetch(rewriteUrl(url));
+			const modifiedUrl = OVERRIDES.RADAR_HOST ? url.replace(RADAR_HOST, OVERRIDES.RADAR_HOST) : url;
+			const response = await fetch(rewriteUrl(modifiedUrl));
 
 			// test response
 			if (!response.ok) throw new Error(`Unable to fetch radar error ${response.status} ${response.statusText} from ${response.url}`);
diff --git a/src/overrides.mjs b/src/overrides.mjs
new file mode 100644
index 0000000..9b1f374
--- /dev/null
+++ b/src/overrides.mjs
@@ -0,0 +1,10 @@
+// read overrides from environment variables
+
+const OVERRIDES = {};
+Object.entries(process.env).forEach(([key, value]) => {
+	if (key.match(/^OVERRIDE_/)) {
+		OVERRIDES[key.replace('OVERRIDE_', '')] = value;
+	}
+});
+
+export default OVERRIDES;
diff --git a/views/index.ejs b/views/index.ejs
index 037eb50..396f36f 100644
--- a/views/index.ejs
+++ b/views/index.ejs
@@ -28,9 +28,12 @@
   <script type="text/javascript" src="resources/data.min.js?_=<%=production%>"></script>
   <script type="text/javascript" src="resources/vendor.min.js?_=<%=production%>"></script>
   <script type="text/javascript" src="resources/ws.min.js?_=<%=production%>"></script>
+	<script type="text/javascript">const OVERRIDES=<%-JSON.stringify(OVERRIDES)%>;</script>
   <% } else { %>
   <link rel="stylesheet" type="text/css" href="styles/main.css" />
-  <script type="text/javascript" src="scripts/vendor/auto/nosleep.js"></script>
+	<!--<script type="text/javascript">const OVERRIDES={};</script>-->
+	<script type="text/javascript">OVERRIDES=<%-JSON.stringify(OVERRIDES)%>;</script>
+	<script type="text/javascript" src="scripts/vendor/auto/nosleep.js"></script>
   <script type="text/javascript" src="scripts/vendor/auto/swiped-events.js"></script>
   <script type="text/javascript" src="scripts/vendor/auto/suncalc.js"></script>
   <script type="module" src="scripts/modules/hazards.mjs"></script>