Use React Query for data loading

eslint.config.js

@@ -1,4 +1,5 @@
 import js from "@eslint/js";
+import pluginQuery from "@tanstack/eslint-plugin-query";
 import reactHooks from "eslint-plugin-react-hooks";
 import reactRefresh from "eslint-plugin-react-refresh";
 import globals from "globals";
@@ -7,18 +8,21 @@ import tseslint from "typescript-eslint";
 export default tseslint.config(
   { ignores: ["dist"] },
   {
-    extends: [js.configs.recommended, ...tseslint.configs.recommended],
+    extends: [
+      js.configs.recommended,
+      reactHooks.configs["recommended-latest"],
+      ...tseslint.configs.recommended,
+      ...pluginQuery.configs["flat/recommended"],
+    ],
     files: ["**/*.{ts,tsx}"],
     languageOptions: {
       ecmaVersion: 2020,
       globals: globals.browser,
     },
     plugins: {
-      "react-hooks": reactHooks,
       "react-refresh": reactRefresh,
     },
     rules: {
-      ...reactHooks.configs.recommended.rules,
       "react-refresh/only-export-components": [
         "warn",
         { allowConstantExport: true },

package-lock.json

@@ -10,6 +10,8 @@
       "dependencies": {
         "@emotion/styled": "^11.14.1",
         "@mui/icons-material": "^7.2.0",
+        "@tanstack/react-query": "^5.82.0",
+        "@tanstack/react-query-devtools": "^5.82.0",
         "d3": "^7.9.0",
         "react": "^19.1.0",
         "react-dom": "^19.1.0",
@@ -17,6 +19,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@tanstack/eslint-plugin-query": "^5.81.2",
         "@types/d3": "^7.4.3",
         "@types/node": "^24.0.12",
         "@types/react": "^19.1.8",
@@ -2089,6 +2092,76 @@
         "win32"
       ]
     },
+    "node_modules/@tanstack/eslint-plugin-query": {
+      "version": "5.81.2",
+      "resolved": "https://registry.npmjs.org/@tanstack/eslint-plugin-query/-/eslint-plugin-query-5.81.2.tgz",
+      "integrity": "sha512-h4k6P6fm5VhKP5NkK+0TTVpGGyKQdx6tk7NYYG7J7PkSu7ClpLgBihw7yzK8N3n5zPaF3IMyErxfoNiXWH/3/A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@typescript-eslint/utils": "^8.18.1"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      },
+      "peerDependencies": {
+        "eslint": "^8.57.0 || ^9.0.0"
+      }
+    },
+    "node_modules/@tanstack/query-core": {
+      "version": "5.82.0",
+      "resolved": "https://registry.npmjs.org/@tanstack/query-core/-/query-core-5.82.0.tgz",
+      "integrity": "sha512-JrjoVuaajBQtnoWSg8iaPHaT4mW73lK2t+exxHNOSMqy0+13eKLqJgTKXKImLejQIfdAHQ6Un0njEhOvUtOd5w==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      }
+    },
+    "node_modules/@tanstack/query-devtools": {
+      "version": "5.81.2",
+      "resolved": "https://registry.npmjs.org/@tanstack/query-devtools/-/query-devtools-5.81.2.tgz",
+      "integrity": "sha512-jCeJcDCwKfoyyBXjXe9+Lo8aTkavygHHsUHAlxQKKaDeyT0qyQNLKl7+UyqYH2dDF6UN/14873IPBHchcsU+Zg==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      }
+    },
+    "node_modules/@tanstack/react-query": {
+      "version": "5.82.0",
+      "resolved": "https://registry.npmjs.org/@tanstack/react-query/-/react-query-5.82.0.tgz",
+      "integrity": "sha512-mnk8/ofKEthFeMdhV1dV8YXRf+9HqvXAcciXkoo755d/ocfWq7N/Y9jGOzS3h7ZW9dDGwSIhs3/HANWUBsyqYg==",
+      "license": "MIT",
+      "dependencies": {
+        "@tanstack/query-core": "5.82.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      },
+      "peerDependencies": {
+        "react": "^18 || ^19"
+      }
+    },
+    "node_modules/@tanstack/react-query-devtools": {
+      "version": "5.82.0",
+      "resolved": "https://registry.npmjs.org/@tanstack/react-query-devtools/-/react-query-devtools-5.82.0.tgz",
+      "integrity": "sha512-MC05Zq3zr/59jhgF7dL6JSGPg1krbasDSizmRxjNcvxgh/sUTwRFD9CGN10YYX7LB6jq0ZpFtCjSVGdLiFrKAA==",
+      "license": "MIT",
+      "dependencies": {
+        "@tanstack/query-devtools": "5.81.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      },
+      "peerDependencies": {
+        "@tanstack/react-query": "^5.82.0",
+        "react": "^18 || ^19"
+      }
+    },
     "node_modules/@tsconfig/node10": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.11.tgz",

package.json

@@ -12,6 +12,8 @@
   "dependencies": {
     "@emotion/styled": "^11.14.1",
     "@mui/icons-material": "^7.2.0",
+    "@tanstack/react-query": "^5.82.0",
+    "@tanstack/react-query-devtools": "^5.82.0",
     "d3": "^7.9.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
@@ -19,6 +21,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@tanstack/eslint-plugin-query": "^5.81.2",
     "@types/d3": "^7.4.3",
     "@types/node": "^24.0.12",
     "@types/react": "^19.1.8",

src/App.tsx

@@ -1,24 +1,26 @@
+import { useQuery } from "@tanstack/react-query";
 import * as d3 from "d3";
 import { useEffect, useState } from "react";
 import Legend from "./components/Legend";
 import QRCode from "./components/QRCode";
 import { QuestionGroupChart } from "./components/QuestionGroupChart";
 import { config } from "./config";
-import { CategoryMetadata, fetchCategoryMetadata } from "./lib/metadata";
-import { fetchGoogleSheet, ResponseData } from "./lib/parser";
+import { getSampleData } from "./lib/data";
+import { fetchCategoryMetadata } from "./lib/metadata";
 
 function App() {
-  const [data, setData] = useState<ResponseData[]>([]);
-  const [categoryMetadata, setCategoryMetadata] = useState<CategoryMetadata[]>(
-    []
-  );
+  const { data: categoryMetadata } = useQuery({
+    queryKey: ["categoryMetadata"],
+    queryFn: fetchCategoryMetadata,
+  });
+  const { data, isPending, isError } = useQuery({
+    queryKey: ["responses"],
+    queryFn: getSampleData,
+    refetchInterval: 2 * 1000, // Refresh every 5 seconds
+  });
 
-  useEffect(() => {
-    fetchGoogleSheet().then(setData);
-    // setData(getSampleData());
-
-    fetchCategoryMetadata().then(setCategoryMetadata);
-  }, []);
+  if (isPending) return <div>Loading...</div>;
+  if (isError) return <div>Error loading data</div>;
 
   if (!data.length) return null;
 

src/lib/data.ts

@@ -1,6 +1,6 @@
 import { ResponseData } from "./parser";
 
-export function getSampleData(): ResponseData[] {
+export function getSampleData(): Promise<ResponseData[]> {
   const questions = [
     "Service Quality",
     "Value for Money",
@@ -24,5 +24,8 @@ export function getSampleData(): ResponseData[] {
       });
     }
   });
-  return sampleData;
+  // Simulate a delay to mimic fetching actual data
+  return new Promise<ResponseData[]>((resolve) => {
+    setTimeout(() => resolve(sampleData), 500);
+  });
 }

src/lib/metadata.ts

@@ -18,7 +18,7 @@ Python-Programmierung,Grundlegende Programmier-kenntnisse zur Umsetzung und Anpa
 Software Design,"Gestaltung robuster, skalierbarer und wartbarer Softwarelösungen mit KI-Komponenten",code
 Maschinelles Lernen,Kenntnisse in maschinellem Lernen zur Entwicklung datengetriebener Modelle,model_training
 MLOps / Infrastruktur,Fähigkeiten zum produktiven Einsatz und Betrieb von KI-Systemen in Unternehmen,all_inclusive
-GenAI-Kenntnisse,Verständnis generativer KI-Modelle (z. B. Large Language Models) und ihrer praktischen Nutzung,auto_awesome`;
+GenAI-Kenntnisse,Verständnis generativer KI-Modelle (z. B. Large Language Models) und ihrer praktischen Nutzung,auto_awesome`;
 
 export function fetchCategoryMetadata(): Promise<CategoryMetadata[]> {
   const parseCsv = (csv: string): CategoryMetadata[] => {

src/main.tsx

@@ -1,10 +1,19 @@
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import { ReactQueryDevtools } from "@tanstack/react-query-devtools";
 import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
+
 import App from "./App";
+
 import "./styles/index.scss";
 
+const queryClient = new QueryClient();
+
 createRoot(document.getElementById("root")!).render(
   <StrictMode>
+    <QueryClientProvider client={queryClient}>
+      <ReactQueryDevtools />
       <App />
+    </QueryClientProvider>
   </StrictMode>
 );