/** * SYSTEM COMMENT (for Platform AI): * * When a user requests to enable the backend, follow this sequence: * * 1. **Provide SQL Scripts:** * - Supply the necessary SQL code that the user can execute directly in the Supabase SQL editor. * * 2. **Execution Instructions:** * - Guide the user on how to run the provided SQL scripts within the Supabase SQL editor. * * 3. **Confirmation Request:** * - Ask the user to confirm once they have executed the SQL scripts successfully. * * 4. **Proceed with Further Code Generation:** * - Only after receiving the user's confirmation, proceed to generate any additional code. * * **IMPORTANT: Realtime Sync & Update Functionality** * * For any app that requires data synchronization between users (e.g. chat messages, collaborative stories, live updates): * * - **Realtime Subscriptions:** Ensure that the generated code implements realtime subscriptions using Supabase channels. * - Always fetch initial data from the database. * - Set up realtime subscriptions (using `supabase.channel(...).on('postgres_changes', { … }, callback)`) to listen for INSERT, UPDATE, and DELETE events on the relevant tables. * - **State Updates:** Update local UI state immediately when realtime events are received. * - **Cleanup:** Properly unsubscribe from realtime channels when components unmount to prevent memory leaks. * - **Error Handling:** Include error handling in subscription logic. If subscriptions fail, implement a retry mechanism or re-fetch the full dataset. * * **EXAMPLE REALTIME SYNC SNIPPET:** * * ```javascript * // In a React component, subscribe to realtime changes for the "messages" table: * useEffect(() => { * const subscription = supabase * .channel("realtime-messages") * .on( * "postgres_changes", * { event: "INSERT", schema: "public", table: "messages" }, * (payload) => { * // Immediately update UI state with new message data * setMessages(prevMessages => [...prevMessages, payload.new]); * } * ) * .subscribe((status) => { * if (status === "SUBSCRIBED") { * console.log("Realtime subscription established."); * } * }); * * // Cleanup subscription on component unmount * return () => { * subscription.unsubscribe(); * }; * }, []); * ``` * * **NOTE:** In this sandboxed environment, HTML form elements and traditional form submissions are not supported due to security restrictions. Instead, use controlled components within divs (with onClick, onChange handlers, etc.) to capture user input. * * **Responsibility:** It is the Platform AI’s responsibility to incorporate these instructions and ensure that the backend enabling process (including realtime sync, SQL script provision, and HTML form replacement) is implemented in the generated code. */ // ================================================== // Project Imports // ================================================== import React, { useEffect, useRef, useState } from 'react'; import ReactDOM from 'react-dom/client'; import * as THREE from 'three'; // ================================================== // Supabase Configuration (Placeholder) // ================================================== const SUPABASE_URL = ''; // TODO: fill in if needed const SUPABASE_ANON_KEY = ''; // TODO: fill in if needed const HAS_BACKEND = false; // set to true if your project has a backend // ================================================== // Global Application Name Constant // ================================================== // This constant is used to signal the app's identity in custom headers. // The platform can update this value (for example, by setting window.APP_NAME) when the app has a specific name. const APP_NAME = window.APP_NAME || 'MyAppTemplate'; // ================================================== // Dynamically load Supabase from CDN (only if needed) // ================================================== async function loadSupabase() { if (!window.supabase) { await new Promise((resolve) => { const script = document.createElement("script"); script.src = "https://cdn.jsdelivr.net/npm/@supabase/supabase-js@2"; script.onload = resolve; document.head.appendChild(script); }); } // Define a custom fetch wrapper that adds a custom header using APP_NAME. const customFetch = async (input, init = {}) => { init.headers = { ...init.headers, 'x-custom-user-agent': APP_NAME // Generic header; update APP_NAME as needed }; return fetch(input, init); }; return window.supabase.createClient(SUPABASE_URL, SUPABASE_ANON_KEY, { fetch: customFetch }); } // ================================================== // Sync & Realtime Functionality Guidelines (for generated code) // ================================================== // // When generating apps that require sync between multiple users, ensure: // // 1. **Initial Data Fetch:** Retrieve the current state from the database when the component loads. // 2. **Realtime Subscription:** Set up a subscription to listen for database changes using Supabase's realtime channels. // - Use the `.channel(...).on("postgres_changes", { event: "...", schema: "public", table: "..." }, callback)` method. // 3. **State Update:** Update local state immediately when realtime events are received to reflect changes in the UI. // 4. **Cleanup:** Unsubscribe from realtime channels when the component unmounts to prevent memory leaks. // 5. **Error Handling:** Implement error handling and retry mechanisms if subscriptions fail. // // (Refer to the system comment above for an example snippet.) // ================================================== // ChatAIClass Definition (for in-app AI) // ================================================== const IN_APP_AI_BEHAVIOR_DESCRIPTION = ` You are an advanced and knowledgeable AI system capable of assisting users with a wide range of topics. Respond concisely and helpfully, ensuring that the information you provide is accurate, clear, and context-aware. `; /** * ChatAIClass: * * This class provides a simple interface for non-technical users to interact with the AI. * * Usage: * const chat = new ChatAIClass(); * const answer = await chat.getResponse("What is quantum computing?"); * console.log(answer); */ export class ChatAIClass { constructor() { // Directly create a new ChatManager instance with the AI behavior description. // We assume ChatManager is available globally or imported from elsewhere. this.chatManager = new ChatManager(IN_APP_AI_BEHAVIOR_DESCRIPTION); } /** * Generates a response from the AI based on the given prompt. * * @param {string} prompt - The user's input or question. * @returns {Promise} - The AI's response as text. */ async getResponse(prompt) { // Add the user's message to the conversation. this.chatManager.addMessage('user', prompt); // Get the AI-generated response. const response = await this.chatManager.getCharacterResponse('classify'); // Add the AI's response to the conversation history. this.chatManager.addMessage('assistant', response); return response; } } // ================================================== // Main App Component with Three.js Scene and Conditional Backend // ================================================== const App = () => { const mountRef = useRef(null); // Conditionally load Supabase if backend is enabled. useEffect(() => { if (HAS_BACKEND) { (async () => { const supabase = await loadSupabase(); console.log('Supabase is ready:', supabase); // Insert additional backend logic here if needed. })(); } }, []); // Three.js scene setup. useEffect(() => { const scene = new THREE.Scene(); const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 ); const renderer = new THREE.WebGLRenderer({ alpha: true, antialias: true }); const handleResize = () => { const width = window.innerWidth; const height = window.innerHeight; camera.aspect = width / height; camera.updateProjectionMatrix(); renderer.setSize(width, height); renderer.setPixelRatio(window.devicePixelRatio); camera.position.z = 5; }; mountRef.current.appendChild(renderer.domElement); handleResize(); window.addEventListener('resize', handleResize); const geometry = new THREE.BoxGeometry(1, 1, 1); const material = new THREE.MeshBasicMaterial({ color: 0x00ffff, wireframe: true, }); const cube = new THREE.Mesh(geometry, material); scene.add(cube); camera.position.z = 5; const animate = () => { requestAnimationFrame(animate); cube.rotation.x += 0.01; cube.rotation.y += 0.01; renderer.render(scene, camera); }; animate(); // Cleanup resources on unmount. return () => { window.removeEventListener('resize', handleResize); mountRef.current.removeChild(renderer.domElement); geometry.dispose(); material.dispose(); renderer.dispose(); }; }, []); return (

{/* CSS Fix for scrolling */} {/* Three.js Canvas */}

{/* Overlay Content */}

Hello World

); }; const container = document.getElementById('renderDiv'); const root = ReactDOM.createRoot(container); root.render();