feat(example): sport tracker app initial commit

Author: Daniele Briggi

.gitignore

@@ -4,10 +4,12 @@
 *.xcbkptlist
 *.plist
 /build
-/dist
+**/dist/**
 /coverage
 *.sqlite
 *.a
 unittest
 /curl/src
-.vscode
+.vscode
+**/node_modules/**
+.env

examples/sport-tracker-app/.env.example

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+# Copy from from the SQLite Cloud Dashboard
+# eg: sqlitecloud://myhost.cloud:8860/my-remote-database.sqlite
+VITE_SQLITECLOUD_CONNECTION_STRING=
+# The database name
+# eg: my-remote-database.sqlite
+VITE_SQLITECLOUD_DATABASE=
+# Your SQLite Cloud API key
+# Copy it from the SQLite Cloud Dashboard -> Settings -> API Keys
+VITE_SQLITECLOUD_API_KEY=
+# Your SQLite Cloud url for APIs
+# Get it from the SQLite Cloud Dashboard in the Weblite section
+# eg: https://myhost.cloud
+VITE_SQLITECLOUD_API_URL=

examples/sport-tracker-app/README.md

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+# Sport Tracker app with SQLite Sync 🚵
+
+A Vite/React demonstration app showcasing [**SQLite Sync**](https://github.com/sqliteai/sqlite-sync) implementation for **offline-first** data synchronization across multiple devices. This example illustrates how to integrate SQLite AI's sync capabilities into modern web applications with proper authentication via [Access Token](https://docs.sqlitecloud.io/docs/access-tokens) and [Row-Level Security (RLS)](https://docs.sqlitecloud.io/docs/rls).
+
+
+## Features
+
+From a **user experience** perspective, this is a simple sport tracking application where users can:
+- Create accounts and log activities (running, cycling, swimming, etc.)
+- View personal statistics and workout history
+- Access "Coach Mode" for managing multiple users' workouts
+
+From a **developer perspective**, this app showcases:
+- **Offline-first** architecture with sync to the remote database using **SQLite Sync** extension for SQLite
+- **Row-Level Security (RLS)** implementation for data isolation and access control on the SQLite Cloud database
+- **Access Tokens** for secure user authentication with SQLite Sync and RLS policy enforcement
+- **Multi-user** data isolation and sharing patterns across different user sessions
+
+## Setup Instructions
+
+### 1. Prerequisites
+- Node.js 18+
+- [SQLite Cloud account](https://sqlitecloud.io)
+
+### 2. Database Setup
+1. Create database in [SQLite Cloud Dashboard](https://dashboard.sqlitecloud.io/).
+2. Execute the exact schema from `sport-tracker-schema.sql`.  
+3. Enable OffSync for all tables on the remote database from the **SQLite Cloud Dashboard -> Databases**.
+4. Enable and configure RLS policies on the **SQLite Cloud Dashboard -> Databases**. See the file `rls-policies.md`.
+
+### 3. Environment Configuration
+
+Rename the `.env.example` into `.env` and fill with your values.
+
+### 4. Installation & Run
+
+```bash
+npm install
+npm run dev
+```
+
+> This app uses the packed WASM version of SQLite with the [SQLite Sync extension enabled](https://www.npmjs.com/package/@sqliteai/sqlite-sync-wasm).
+
+## Demo Use Case: Multi-User Sync Scenario
+
+This walkthrough demonstrates how SQLite Sync handles offline-first synchronization between multiple users:
+
+### The Story: Bob the Runner & Coach Sarah
+
+1. **Bob starts tracking offline** 📱
+   - Open [localhost:5173](http://localhost:5173) in your browser
+   - Create user `bob` and add some activities
+   - Notice Bob's data is stored locally - no internet required!
+
+2. **Bob goes online and syncs** 🌐
+   - Click `SQLite Sync` to authenticate SQLite Sync
+   - Click `Sync & Refresh` - this generates an Access Token and synchronizes Bob's local data to the cloud
+   - Bob's activities are now replicated in the cloud
+
+3. **Coach Sarah joins from another device** 👩‍💼
+   - Open a new private/incognito browser window at [localhost:5173](http://localhost:5173)
+   - Create user `coach` (this triggers special coach privileges via RLS)
+   - Enable `SQLite Sync` and click `Sync & Refresh`. Coach can now see Bob's synced activities thanks to RLS policies
+
+4. **Coach creates a workout for Bob** 💪
+   - Coach creates a workout assigned to Bob
+   - Click `Sync & Refresh` to upload the workout to the cloud
+
+5. **Bob receives his workout** 📲
+   - Go back to Bob's browser window
+   - Click `Sync & Refresh` - Bob's local database downloads the new workout from Coach
+   - Bob can now see his personalized workout
+
+6. **Bob gets a new device** 📱➡️💻
+   - Log out Bob, then select it and click `Restore from cloud`
+   - This simulates Bob logging in from a completely new device with no local data
+   - Enable `SQLite Sync` and sync - all of Bob's activities and workouts are restored from the cloud
+
+**Key takeaway**: Users can work offline, sync when convenient, and seamlessly restore data on new devices!
+
+
+## SQLite Sync Implementation
+
+### 1. Database Initialization
+
+```typescript
+// database.ts - Initialize sync for each table
+export class Database {
+  async initSync() {
+    await this.exec('SELECT cloudsync_init("users")');
+    await this.exec('SELECT cloudsync_init("activities")');
+    await this.exec('SELECT cloudsync_init("workouts")');
+  }
+}
+```
+
+### 2. Token Management
+
+```typescript
+// SQLiteSync.ts - Access token handling
+private async getValidToken(userId: string, name: string): Promise<string> {
+  const storedTokenData = localStorage.getItem('token');
+  
+  if (storedTokenData) {
+    const parsed: TokenData = JSON.parse(storedTokenData);
+    const tokenExpiry = new Date(parsed.expiresAt);
+    
+    if (tokenExpiry > new Date()) {
+      return parsed.token; // Use cached token
+    }
+  }
+  
+  // Fetch new token from API
+  const tokenData = await this.fetchNewToken(userId, name);
+  localStorage.setItem('token', JSON.stringify(tokenData));
+  return tokenData.token;
+}
+```
+
+Then authorize SQLite Sync with the token. This operation is executed again when tokens expire and a new one is provided.
+
+```typescript
+async sqliteSyncSetToken(token: string) {
+  await this.exec(`SELECT cloudsync_network_set_token('${token}')`);
+}
+```
+
+### 3. Synchronization
+
+The sync operation sends local changes to the cloud and receives remote changes:
+
+```typescript
+async sqliteSyncNetworkSync() {
+  await this.exec('SELECT cloudsync_network_sync()');
+}
+```
+
+## Row-Level Security (RLS)
+
+This app demonstrates **Row-Level Security** configured in the SQLite Cloud Dashboard. RLS policies ensure:
+
+- **Users** can only see their own activities and workouts
+- **Coaches** can access all users' data and create workouts for the users
+- **Data isolation** is enforced at the database level
+
+### Example RLS Policies
+
+```sql
+-- Policy for selecting activities
+auth_userid() = user_id OR json_extract(auth_json(), '$.name') = 'coach'
+
+-- Policy for inserting into workouts table  
+json_extract(auth_json(), '$.name') = 'coach'
+```
+
+> **Note**: Configure RLS policies in your SQLite Cloud Dashboard under Databases → RLS
+
+## Security Considerations
+
+⚠️ **Important**: This demo includes client-side API key usage for simplicity. In production:
+
+- Never expose API keys in client code
+- Use **server-side generation** for Access Tokens
+- Implement a proper authentication flow
+
+## Documentation Links
+
+Explore the code and learn more:
+
+- **SQLite Sync API**: [sqlite-sync](https://github.com/sqliteai/sqlite-sync/blob/main/API.md)
+- **Access Tokens Guide**: [SQLite Cloud Access Tokens](https://docs.sqlitecloud.io/docs/access-tokens)
+- **Row-Level Security**: [SQLite Cloud RLS](https://docs.sqlitecloud.io/docs/rls)
+
+## Performance considerations
+
+The database is persisted in the Origin-Private FileSystem OPFS (if available) but performance is much lower. Read more [here](https://sqlite.org/wasm/doc/trunk/persistence.md)

examples/sport-tracker-app/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Sport Tracker</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>