Tanstack query

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To integrate TanStack Query into your Next.js application for caching and data fetching, you can follow these steps. Based on the provided code, I'll show you how to refactor it to use TanStack Query.

First, ensure you have TanStack Query installed:

npm install @tanstack/react-query

Next, set up the QueryClient and QueryClientProvider in your application. This is typically done in your _app.js or _app.tsx file:

// _app.js or _app.tsx
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { useState } from 'react';

function MyApp({ Component, pageProps }) {
  const [queryClient] = useState(() => new QueryClient());

  return (
    <QueryClientProvider client={queryClient}>
      <Component {...pageProps} />
    </QueryClientProvider>
  );
}

export default MyApp;

Now, refactor your LazyEventSection component to use TanStack Query's useQuery hook:

'use client';

import { useState, useCallback } from 'react';
import { useQuery } from '@tanstack/react-query';
import { SafeEvent, SafeUser } from '@/app/types';
import useIntersectionObserver from '@/app/hooks/useIntersectionObserver';
import CategorizedEventSection from './CategorizedEventSection';
import getEventsByRegion from '@/app/actions/event-actions/getEventsByRegion';
import getEventsByCategory from '@/app/actions/event-actions/getEventsByCategory';
import { SkeletonCard } from '../ui/SkeletonCard';

interface LazyEventSectionProps {
  section: string;
  currentUser?: SafeUser | null;
  isRegion?: boolean;
}

const LazyEventSection: React.FC<LazyEventSectionProps> = ({
  section,
  currentUser,
  isRegion = false,
}) => {
  const fetchEvents = async () => {
    return isRegion ? await getEventsByRegion(section) : await getEventsByCategory(section);
  };

const { data: events, isLoading } = useQuery(['events', section], fetchEvents, {
enabled: false, // Disable automatic query execution
});

const loadEvents = useCallback(() => {
queryClient.refetchQueries(['events', section]);
}, [section]);

const setRef = useIntersectionObserver(loadEvents);

return (
<div ref={setRef}>
{events ? (
<CategorizedEventSection
sectionLabel={section}
events={events}
currentUser={currentUser}
/>
) : (
<div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-4">
{Array.from({ length: 4 }).map((_, index) => (
<SkeletonCard key={index} />
))}
</div>
)}
</div>
);
};

export default LazyEventSection;

In this refactored code:
- We use the `useQuery` hook from TanStack Query to fetch data.
- The `enabled: false` option is used to disable automatic query execution, allowing us to control when the query is executed.
- The `loadEvents` function triggers the query manually using `queryClient.refetchQueries`.

This setup leverages TanStack Query's caching and data-fetching capabilities, improving the performance and user experience of your application.

For more information on using TanStack Query with Next.js, you can refer to the **Next.js documentation** (<https://nextjs.org/docs/app/building-your-application/data-fetching/fetching-caching-and-revalidating#fetching-data-on-the-client-with-third-party-libraries>) and
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