Add with-xata example (vercel#39864)

This Pull Request adds a `with-xata` example to use [Xata](https://xata.io) as the data layer of a Next.js app.

## Documentation / Examples

- [x] Make sure the linting passes by running `pnpm lint`
- [x] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples)


Co-authored-by: Balázs Orbán <18369201+balazsorban44@users.noreply.github.com>

examples/with-xata/.gitignore

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+# See http://help.github.com/ignore-files/ for more about ignoring files.
+
+# compiled output
+/build
+/out
+/dist
+/tmp
+/out-tsc
+
+# dependencies
+/node_modules
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# misc
+/.sass-cache
+/connect.lock
+/coverage
+/libpeerconnection.log
+npm-debug.log
+yarn-error.log
+testem.log
+/typings
+
+# System Files
+.DS_Store
+Thumbs.db
+
+.next
+.turbo
+node_modules
+
+**/.xatarc
+.env
+.env.*

examples/with-xata/README.md

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+# Next.js + Xata
+
+This example showcases how to use Next.js with [Xata](https://xata.io) as your data layer.
+
+With this template you get out-of-the-box:
+
+- API Route to connect to your Xata database
+- Type-safe Codegen
+- Accessibility-Ready
+  - Dark/Light mode
+  - Respects `prefers-reduce-motion` for CSS Transitions
+
+## Deploy your own
+
+Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example) or preview live with [StackBlitz](https://stackblitz.com/github/vercel/next.js/tree/canary/examples/with-xata)
+
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/with-xata&project-name=with-xata&repository-name=with-xata)
+
+## Demo
+
+[nextjs-with-xata.vercel.app](https://nextjs-with-xata.vercel.app)
+
+## How to use
+
+Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init), [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/), or [pnpm](https://pnpm.io) to bootstrap the example:
+
+```sh
+npx create-next-app --example cms-contentful cms-contentful-app
+```
+
+```sh
+yarn create next-app --example cms-contentful cms-contentful-app
+```
+
+```sh
+pnpm create next-app --example cms-contentful cms-contentful-app
+```
+
+### Link Your Xata Workspace and Run Codegen
+
+> 💡 consider [installing the Xata CLI globally](https://xata.io/docs/cli/getting-started), it will likely improve your experience managing your databases
+
+```sh
+npm run start:xata
+```
+
+> ⚠️ once linked, you can just run `xata` to re-generate types.
+
+### Start Coding
+
+Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
+
+> 💡 the template will prompt you to create a dummy new table (`nextjs_with_xata_example`) with some useful resources.
+
+## Notes
+
+Some tips that may help you develop your app.
+
+- The Xata [VS Code Extension](https://marketplace.visualstudio.com/items?itemName=xata.xata) will make managing your data more comfortable
+- Prefer fetching data from `getServerSideProps()` or `getStaticProps()`
+- Create a Serverless Route(s) to handle data mutations
+
+Deploy it to the cloud with [Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).

examples/with-xata/next-env.d.ts

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+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.

examples/with-xata/package.json

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+{
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "start:xata": "xata init --schema=schema.template.json --codegen=utils/xata.codegen.ts",
+    "poststart:xata": "xata codegen",
+    "xata": "xata codegen"
+  },
+  "devDependencies": {
+    "@types/node": "18.6.5",
+    "@types/react": "18.0.17",
+    "@types/react-dom": "18.0.6",
+    "@xata.io/cli": "0.8.1",
+    "eslint": "8.21.0",
+    "eslint-config-next": "latest",
+    "typescript": "4.7.4"
+  },
+  "dependencies": {
+    "@xata.io/client": "^0.16.1",
+    "next": "latest",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
+  }
+}

examples/with-xata/pages/_app.tsx

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+import type { AppProps } from 'next/app'
+import Head from 'next/head'
+import '../styles/root.css'
+
+const metas = {
+  title: 'Next.js with-xata',
+  description: 'Run Next.js with Xata with this awesome template',
+  image:
+    process.env.NODE_ENV === 'development'
+      ? 'http://localhost:3000/og.jpg'
+      : 'https://nextjs-with-xata.vercel.app/og.jpg',
+}
+
+export default function App({ Component, pageProps }: AppProps) {
+  return (
+    <>
+      <Head>
+        <title>{metas.title}</title>
+        <meta property="og:title" content={metas.title} key="og:title" />
+        <meta property="og:image" content={metas.image} key="og:image" />
+        <meta
+          property="description"
+          content={metas.description}
+          key="description"
+        />
+        <meta
+          property="og:description"
+          content={metas.description}
+          key="og:description"
+        />
+        <meta property="og:type" content="website" />
+        <meta property="twitter:card" content="summary_large_image" />
+        <meta
+          property="twitter:title"
+          content={metas.title}
+          key="twitter:title"
+        />
+        <meta
+          property="twitter:description"
+          content={metas.description}
+          key="twitter:description"
+        />
+        <meta
+          property="twitter:image"
+          content={metas.image}
+          key="twitter:image"
+        />
+        <meta
+          name="theme-color"
+          content="#000"
+          media="(prefers-color-scheme: dark)"
+        />
+        <meta
+          name="theme-color"
+          content="#fff"
+          media="(prefers-color-scheme: light)"
+        />
+      </Head>
+      <Component {...pageProps} />
+    </>
+  )
+}

examples/with-xata/pages/api/clean-xata.ts

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+import type { NextApiRequest, NextApiResponse } from 'next'
+import { getXataClient } from '../../utils/xata.codegen'
+
+const xata = getXataClient()
+
+const deleteItem = async (id: string) => {
+  return await xata.db.nextjs_with_xata_example.delete(id)
+}
+
+export async function cleanDummyDataFromXata(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  const { id } = req.body
+  await deleteItem(id)
+
+  res.json({
+    ok: true,
+  })
+}
+
+export default cleanDummyDataFromXata

examples/with-xata/pages/api/write-links-to-xata.ts

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+import type { NextApiRequest, NextApiResponse } from 'next'
+import { getXataClient } from '../../utils/xata.codegen'
+
+const LINKS = [
+  {
+    description: 'Everything you need to know about Xata APIs and tools.',
+    title: 'Xata Docs',
+    url: 'https://xata.io/docs',
+  },
+  {
+    description: 'In case you need to check some Next.js specifics.',
+    title: 'Next.js Docs',
+    url: 'https://nextjs.org/docs',
+  },
+  {
+    description:
+      'Maintain your flow by managing your Xata Workspace without ever leaving VS Code.',
+    title: 'Xata VS Code Extension',
+    url: 'https://marketplace.visualstudio.com/items?itemName=xata.xata',
+  },
+  {
+    description: 'Get help. Offer help. Show us what you built!',
+    title: 'Xata Discord',
+    url: 'https://xata.io/discord',
+  },
+]
+
+const xata = getXataClient()
+
+export default async function writeLinksToXata(
+  _req: NextApiRequest,
+  res: NextApiResponse
+) {
+  await xata.db.nextjs_with_xata_example.create(LINKS)
+  res.json({
+    ok: true,
+  })
+}

examples/with-xata/pages/index.tsx

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+import type { InferGetServerSidePropsType } from 'next'
+import Image from 'next/image'
+import { getXataClient } from '../utils/xata.codegen'
+import xatafly from '../public/xatafly.gif'
+
+const pushDummyData = async () => {
+  const response = await fetch('/api/write-links-to-xata')
+
+  if (response.ok) {
+    window?.location.reload()
+  }
+}
+
+const removeDummyItem = async (id: string) => {
+  const { status } = await fetch('/api/clean-xata', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ id }),
+  })
+
+  if (status === 200) {
+    window?.location.reload()
+  }
+}
+
+export default function IndexPage({
+  links,
+}: InferGetServerSidePropsType<typeof getServerSideProps>) {
+  return (
+    <main>
+      <header>
+        <Image src={xatafly} priority />
+        <h1>
+          Next.js with<span aria-hidden>&#8209;</span>xata
+        </h1>
+      </header>
+      <article>
+        {links.length ? (
+          <ul>
+            {links.map(({ id, title, url, description }) => (
+              <li key={url}>
+                <a href={url} rel="noopener noreferrer" target="_blank">
+                  {title}
+                </a>
+                <p>{description}</p>
+
+                <button
+                  type="button"
+                  onClick={() => {
+                    removeDummyItem(id)
+                  }}
+                >
+                  <span role="img" aria-label="delete item">
+                    🗑
+                  </span>
+                </button>
+              </li>
+            ))}
+          </ul>
+        ) : (
+          <section>
+            <h2>No records found.</h2>
+            <strong>
+              Create a `nextjs_with_xata_example` and push some useful links to
+              see them here.
+            </strong>
+            <button
+              type="button"
+              onClick={() => {
+                pushDummyData()
+              }}
+            >
+              Push records to Xata
+            </button>
+          </section>
+        )}
+      </article>
+      <footer>
+        <span>
+          Made by{' '}
+          <a href="https://xata.io" rel="noopener noreferrer" target="_blank">
+            <object data="/xatafly.svg" />
+          </a>
+        </span>
+      </footer>
+    </main>
+  )
+}
+
+export const getServerSideProps = async () => {
+  const xata = await getXataClient()
+  const links = await xata.db.nextjs_with_xata_example.getAll()
+  return {
+    props: {
+      links,
+    },
+  }
+}