hard refresh

package.json

@@ -6,8 +6,14 @@
     "@testing-library/jest-dom": "^5.16.5",
     "@testing-library/react": "^13.4.0",
     "@testing-library/user-event": "^13.5.0",
+    "esri-leaflet": "^3.0.8",
+    "esri-leaflet-heatmap": "^2.0.1",
+    "leaflet": "^1.9.2",
+    "leaflet.heat": "^0.2.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
+    "react-esri-leaflet": "^2.0.1",
+    "react-leaflet": "^4.1.0",
     "react-scripts": "5.0.1",
     "web-vitals": "^2.1.4"
   },

src/App.js

@@ -1,25 +1,11 @@
-import logo from './logo.svg';
-import './App.css';
+import React from "react";
+import Map from "./Map";
+import "./styles.css";
 
-function App() {
-  return (
-    <div className="App">
-      <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
-        <p>
-          Edit <code>src/App.js</code> and save to reload.
-        </p>
-        <a
-          className="App-link"
-          href="https://reactjs.org"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          Learn React
-        </a>
-      </header>
-    </div>
-  );
+export default function App() {
+	return (
+		<div className="App">
+			<Map />
+		</div>
+	);
 }
-
-export default App;

src/Map.jsx

@@ -0,0 +1,88 @@
+import React from "react";
+import { MapContainer, TileLayer } from "react-leaflet";
+import HeatmapLayer from "react-esri-leaflet/plugins/HeatmapLayer";
+import "leaflet/dist/leaflet.css";
+import { useState, useEffect } from "react";
+
+const urls = [
+	"https://sampleserver6.arcgisonline.com/arcgis/rest/services/Earthquakes_Since1970/MapServer/0",
+	"https://sampleserver6.arcgisonline.com/arcgis/rest/services/Earthquakes_Since1970/MapServer/0",
+];
+
+let index = 0;
+
+let lastRefreshed = Date.now();
+let heatmapTurnedOff;
+let isHeatmapOff = false;
+function Map() {
+	const [url, setUrl] = useState(
+		"https://sampleserver6.arcgisonline.com/arcgis/rest/services/CommunityAddressing/MapServer/0"
+	);
+	const [refreshHook, setRefreshHook] = useState(0);
+
+	useEffect(() => {
+		const interval = setInterval(() => {
+			if (Date.now() - lastRefreshed >= 1000) {
+				if (index === 1) {
+					setUrl(urls[index]);
+					index = 0;
+				} else {
+					setUrl(urls[index]);
+					index = 1;
+				}
+			}
+
+			setRefreshHook(Math.random());
+			//console.log(urls[index]);
+		}, 100);
+
+		return () => clearInterval(interval);
+	}, []);
+
+	function renderHeatmap() {
+		//console.log("Render");
+		return (
+			<HeatmapLayer
+				url={url}
+				radius={20}
+				eventHandlers={{
+					loading: () => console.log("loading heatmap"),
+				}}
+			/>
+		);
+	}
+
+	function turnOffMap() {
+		//console.log("Turn off");
+
+		if (!isHeatmapOff) {
+			heatmapTurnedOff = Date.now();
+			isHeatmapOff = true;
+		}
+
+		//console.log("heatmapTurnedOff ago: " + (Date.now() - heatmapTurnedOff));
+
+		if (Date.now() - heatmapTurnedOff >= 50) {
+			// Wie lange ist die heatpmap aus???
+			//console.log("Turned off for 500");
+			lastRefreshed = Date.now(); // Mach map wieder an
+			isHeatmapOff = false;
+		}
+
+		return "";
+	}
+
+	return (
+		<MapContainer id="mapId" zoom={2} center={[39.759, -88.157]}>
+			{refreshHook ? "" : ""}
+			<TileLayer
+				attribution='&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
+				url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
+			/>
+			{/*console.log("lastRefreshed ago: " + (Date.now() - lastRefreshed))*/}
+			{Date.now() - lastRefreshed >= 5000 ? turnOffMap() : renderHeatmap()}
+		</MapContainer>
+	);
+}
+
+export default Map;

src/index.js

@@ -1,17 +1,12 @@
-import React from 'react';
-import ReactDOM from 'react-dom/client';
-import './index.css';
-import App from './App';
-import reportWebVitals from './reportWebVitals';
+import { StrictMode } from "react";
+import { render } from "react-dom";
 
-const root = ReactDOM.createRoot(document.getElementById('root'));
-root.render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>
+import App from "./App";
+
+const rootElement = document.getElementById("root");
+render(
+	<StrictMode>
+		<App />
+	</StrictMode>,
+	rootElement
 );
-
-// If you want to start measuring performance in your app, pass a function
-// to log results (for example: reportWebVitals(console.log))
-// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
-reportWebVitals();

src/styles.css

@@ -0,0 +1,14 @@
+.App {
+	font-family: sans-serif;
+}
+
+html,
+body,
+#root,
+.App,
+#mapId {
+	width: 100%;
+	height: 100%;
+	margin: 0;
+	padding: 0;
+}