chore: add playground for testing the library

Author: athulanilthomas

apps/playground/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "playground",
+  "version": "1.0.0",
+  "description": "A playground for testing Splitwise TypeScript SDK",
+  "keywords": [],
+  "author": "",
+  "scripts": {
+    "dev": "npx listhen ./src/index.ts"
+  },
+  "dependencies": {
+    "h3": "^1.15.3",
+    "listhen": "^1.9.0",
+    "splitwise-ts": "workspace:*"
+  },
+  "license": "ISC",
+  "packageManager": "pnpm@10.11.1"
+}

apps/playground/src/index.ts

@@ -0,0 +1,40 @@
+import { createApp, eventHandler } from "h3";
+import { OAuth2User, Client } from 'splitwise-ts'
+
+export const app = createApp();
+
+/**
+ * This is a simple handler that retrieves the current user
+ * using the Splitwise TypeScript SDK.
+ * You can run this app using the command: `pnpm dev`
+ */
+app.use("/", eventHandler(async (event) => {
+    // Replace <consumer-key> and <consumer-secret> with your actual Splitwise OAuth credentials
+    const user = new OAuth2User({
+        clientId: process.env.SPLITWISE_CONSUMER_KEY as string,
+        clientSecret: process.env.SPLITWISE_CONSUMER_SECRET as string,
+    })
+
+    // Request an access token with error handling
+    try {
+        await user.requestAccessToken()
+    } catch (error) {
+        return { error: "Failed to obtain access token", details: error instanceof Error ? error.message : String(error) }
+    }
+
+    // Create a new Splitwise client with the authenticated user
+    const client = new Client(user)
+
+    const myGroup = (await client.groups.getGroups()).groups?.find(group => {
+        return group.name === 'Test Group in Town'
+    })
+
+    const expense = await client.expenses.createExpense({
+        group_id: myGroup?.id,
+        description: 'This is a text expense from splitwise-ts client',
+        cost: '5000',
+        split_equally: true,
+    })
+
+    return expense
+}));

package.json

@@ -2,7 +2,7 @@
   "name": "splitwise-ts",
   "scripts": {
     "build": "turbo run build",
-    "dev": "turbo run dev",
+    "dev": "turbo run dev --filter=playground",
     "lint": "turbo run lint",
     "check-types": "turbo run check-types"
   },