feat(examples): add with-turso

examples/with-turso/.env.example

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+TURSO_DB_URL=
+TURSO_DB_TOKEN=

examples/with-turso/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+*.db

examples/with-turso/README.md

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+# Turso
+
+[Turso](https://turso.tech) is a SQLite-compatible database built on libSQL, the Open Contribution fork of SQLite. It enables scaling to hundreds of thousands of databases per organization and supports replication to any location, including your own servers, for microsecond-latency access.
+
+* [Turso Documentation](https://docs.turso.tech)
+* [Turso Support](https://discord.com/invite/4B5D7hYwub)
+
+## Features
+
+* Uses SQLite `dev.db` locally
+* App Router
+* Server Actions
+
+## How to use
+
+You can run this example locally using SQLite. The example will automatically create a `todos` table using the file `dev.db`.
+
+Create a new Next app using the `with-turso` example:
+
+```bash
+npx create-next-app --example with-turso with-turso-app
+```
+
+```bash
+yarn create next-app --example with-turso with-turso-app
+```
+
+```bash
+pnpm create next-app --example with-turso with-turso-app
+```
+
+Then install the dependencies and run the Next.js development server:
+
+```bash
+npm install
+npm run dev
+
+# or
+
+yarn install
+yarn dev
+
+# or
+#
+pnpm install
+pnpm dev
+```
+
+You should now be able to go to [http://localhost:3000](http://localhost:3000).
+
+## Deploy to Vercel
+
+You can deploy this app to Vercel in a few simple steps:
+
+1. **Signup to Turso**
+
+    Install the Turso CLI and login using GitHub:
+
+    ```bash
+    # macOS
+    brew install tursodatabase/tap/turso
+
+    # Windows (WSL) & Linux:
+    # curl -sSfL https://get.tur.so/install.sh | bash
+    ```
+
+2. **Create a database**
+
+    Begin by creating your first database:
+
+    ```bash
+    turso db create [database-name]
+    ```
+
+3. **Create a table**
+
+    Connect to the turso shell and create your first table:
+
+    ```bash
+    turso db shell <database-name>
+    ```
+
+    ```bash
+    CREATE TABLE todos(id INTEGER PRIMARY KEY AUTOINCREMENT, description TEXT NOT NULL)
+    ```
+
+4. **Retrieve database URL**
+
+    You'll need to fetch your database URL and assign it to `TURSO_DB_URL` on deployment:
+
+    ```bash
+    turso db show <database-name> --url
+    ```
+
+5. **Create database auth token**
+
+    Now create an access token and assign it to `TURSO_DB_TOKEN` on deployment:
+
+    ```bash
+    turso db tokens create <database-name>
+    ```
+
+6. **Deploy to Vercel**
+
+    [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fvercel%2Fnext.js%2Ftree%2Fcanary%2Fexamples%2Fwith-turso&env=TURSO_DB_URL,TURSO_DB_TOKEN)

examples/with-turso/app/actions.ts

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+"use server";
+
+import { revalidatePath } from "next/cache";
+
+import { db } from "@/lib/turso";
+
+export const addTodo = async (formData: FormData) => {
+  await db.execute({
+    sql: "INSERT INTO todos (description) VALUES (?)",
+    args: [formData.get("description") as string],
+  });
+
+  revalidatePath("/");
+};
+
+export const removeTodo = async (formData: FormData) => {
+  await db.execute({
+    sql: "DELETE FROM todos WHERE id = ?",
+    args: [formData.get("id") as string],
+  });
+
+  revalidatePath("/");
+};

examples/with-turso/app/form.tsx

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+"use client";
+
+import { useRef } from "react";
+import { useFormStatus } from "react-dom";
+
+import { addTodo } from "./actions";
+
+function Submit() {
+  const { pending } = useFormStatus();
+
+  return (
+    <button type="submit" aria-disabled={pending} className="sr-only">
+      Add
+    </button>
+  );
+}
+
+export function Form() {
+  const formRef = useRef<HTMLFormElement>(null);
+
+  formRef.current?.reset();
+
+  return (
+    <form
+      action={async (formData) => {
+        await addTodo(formData);
+        formRef.current?.reset();
+      }}
+      className="rounded-md border border-gray-300 p-3 shadow-sm"
+      ref={formRef}
+    >
+      <input
+        id="description"
+        name="description"
+        placeholder="Insert new todo"
+        className="w-full text-black outline-none"
+        required
+        aria-label="Description of todo"
+        type="text"
+        autoFocus
+      />
+
+      <Submit />
+    </form>
+  );
+}

examples/with-turso/app/globals.css

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;

examples/with-turso/app/layout.tsx

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+import type { Metadata } from "next";
+import { Inter } from "next/font/google";
+import "./globals.css";
+
+const inter = Inter({ subsets: ["latin"] });
+
+export const metadata: Metadata = {
+  title: "Next.js + Turso",
+  description: "Next.js Server Actions Demo + Turso",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body className={inter.className}>{children}</body>
+    </html>
+  );
+}

examples/with-turso/app/page.tsx

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+import { TodoList } from './todo-list'
+import { Form } from "./form";
+
+export default function Home() {
+  return (
+    <main className="max-w-2xl mx-auto space-y-12 px-6 py-32">
+
+      <div className="space-y-3 text-center">
+        <h1 className="text-3xl font-medium">Turso</h1>
+        <p className="text-gray-500">Local SQLite with libSQL and Turso</p>
+      </div>
+
+      <div className="space-y-3">
+        <TodoList />
+        <Form />
+      </div>
+    </main >
+  );
+}

examples/with-turso/app/todo-list.tsx

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+import { type TodoItem, Todo } from "./todo";
+
+import { db } from "@/lib/turso";
+
+// The code below can be removed in production apps
+// Useful for getting started locally with SQLite
+async function findOrCreateTodosTable() {
+  const result = await db.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='todos'")
+
+  if (!result || result?.rows?.length === 0) {
+    await db.execute("CREATE TABLE todos(id INTEGER PRIMARY KEY AUTOINCREMENT, description TEXT NOT NULL)")
+  }
+}
+
+export async function TodoList() {
+  await findOrCreateTodosTable()
+  const result = await db.execute("SELECT * FROM todos");
+  const rows = result.rows as unknown as TodoItem[];
+
+  if (!result || result?.rows?.length === 0) return null;
+
+  return rows.map((row, index) => (
+    <Todo
+      key={index}
+      item={{
+        id: row.id,
+        description: row.description,
+      }}
+    />
+  ));
+}

examples/with-turso/app/todo.tsx

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+"use client";
+
+import { removeTodo } from "./actions";
+
+export type TodoItem = {
+  id: number;
+  description: string;
+};
+
+export function Todo({ item }: { item: TodoItem }) {
+  return (
+    <li className="flex items-center justify-between rounded-md border border-gray-100 p-3">
+      <div className="flex w-full items-center space-x-3">
+        {item.description}
+      </div>
+      <form action={removeTodo}>
+        <button name="id" className="p-1 text-3xl" value={item.id}>
+          &times;
+        </button>
+      </form>
+    </li>
+  );
+}

examples/with-turso/lib/turso.ts

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+import { createClient } from "@libsql/client";
+
+export const db = createClient({
+  url: process.env.TURSO_DB_URL ? process.env.TURSO_DB_URL : "file:./dev.db",
+  authToken: process.env.TURSO_DB_TOKEN,
+});

examples/with-turso/next.config.mjs

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+/** @type {import('next').NextConfig} */
+const nextConfig = {};
+
+export default nextConfig;

examples/with-turso/package.json

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+{
+  "private": true,
+  "scripts": {
+    "dev": "next dev --turbo",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@libsql/client": "0.4.0",
+    "next": "latest",
+    "react": "^18",
+    "react-dom": "^18"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "autoprefixer": "^10.0.1",
+    "eslint": "^8",
+    "eslint-config-next": "14.1.0",
+    "postcss": "^8",
+    "tailwindcss": "^3.3.0",
+    "typescript": "^5"
+  }
+}

examples/with-turso/postcss.config.js

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+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};

examples/with-turso/tailwind.config.ts

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+import type { Config } from "tailwindcss";
+
+const config: Config = {
+  content: [
+    "./components/**/*.{js,ts,jsx,tsx,mdx}",
+    "./app/**/*.{js,ts,jsx,tsx,mdx}",
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};
+export default config;