import os
import json
import requests
from flask import Blueprint, jsonify, request
from flask_login import login_required
llm = Blueprint('llm', __name__)
def _generate_script_from_natural_language(natural_query):
"""Generates a Javascript function from natural language using Gemini REST API."""
gemni_model = os.environ.get("GEMINI_MODEL", "gemini-1.5-flash")
api_key = os.environ.get("GEMINI_API_KEY")
if not api_key:
return None, "GEMINI_API_KEY environment variable not set."
api_url = f"https://generativelanguage.googleapis.com/v1beta/models/{gemni_model}:generateContent?key={api_key}"
headers = {'Content-Type': 'application/json'}
try:
prompt = f"""
You are an expert Javascript developer. Your task is to write a complete, production-ready Javascript async function based on the user's request.
**Function Signature:**
Your function MUST have the following signature: `async (req, environment) => {{ ... }}`
- `req`: An object containing details about the incoming HTTP request (e.g., `req.method`, `req.headers`, `req.body`, `req.query`).
- `environment`: A mutable JSON object that persists across executions. You can read and write to it to maintain state.
**Environment & Constraints:**
- The function will be executed in a simple, sandboxed Javascript environment.
- **CRITICAL**: ALL helper functions or variables MUST be defined *inside* the main `async` function. Do not define anything in the global scope.
- **DO NOT** use `require()`, `import`, or any other module loading system.
- **DO NOT** access the file system (`fs` module) or make network requests.
- You have access to a `console.log()` function for logging.
**Response Helpers:**
You must use one of the following functions to return a response:
- `HtmlResponse(body)`: Returns an HTML response.
- `JsonResponse(body)`: Returns a JSON response.
- `TextResponse(body)`: Returns a plain text response.
- `RedirectResponse(url)`: Redirects the user.
**Complex Example (Tic-Tac-Toe):**
```javascript
async (req, environment) => {{
// Helper function defined INSIDE the main function
function checkWinner(board) {{
const winConditions = [
[0, 1, 2], [3, 4, 5], [6, 7, 8],
[0, 3, 6], [1, 4, 7], [2, 5, 8],
[0, 4, 8], [2, 4, 6]
];
for (const condition of winConditions) {{
const [a, b, c] = condition;
if (board[a] && board[a] === board[b] && board[a] === board[c]) {{
return board[a];
}}
}}
return null;
}}
if (!environment.board) {{
environment.board = Array(9).fill("");
environment.turn = "X";
environment.winner = null;
}}
if (req.method === "POST" && req.json && req.json.move !== undefined) {{
const move = parseInt(req.json.move);
if (environment.board[move] === "" && !environment.winner) {{
environment.board[move] = environment.turn;
environment.turn = environment.turn === "X" ? "O" : "X";
environment.winner = checkWinner(environment.board);
}}
}}
const boardHTML = environment.board.map((cell, index) => ``).join("");
const message = environment.winner ? `Player ${{environment.winner}} wins!` : `Turn: ${{environment.turn}}`;
return HtmlResponse(`
Tic-Tac-Toe
${{message}}
${{boardHTML}}
`);
}}
```
**User's request:** "{natural_query}"
Return ONLY the complete Javascript function code, without any explanation, comments, or surrounding text/markdown.
"""
payload = json.dumps({
"contents": [{"parts": [{"text": prompt}]}]
})
response = requests.post(api_url, headers=headers, data=payload)
response.raise_for_status()
response_data = response.json()
candidates = response_data.get('candidates', [])
if not candidates:
return None, "No candidates found in API response."
content = candidates[0].get('content', {})
parts = content.get('parts', [])
if not parts:
return None, "No parts found in API response content."
generated_script = parts[0].get('text', '').strip()
# More robustly extract from markdown
if generated_script.startswith("```javascript"):
generated_script = generated_script[12:]
if generated_script.endswith("```"):
generated_script = generated_script[:-3]
generated_script = generated_script.strip()
# Remove any leading non-code characters
if not generated_script.startswith('async ('):
async_start = generated_script.find('async (')
if async_start != -1:
generated_script = generated_script[async_start:]
return generated_script.strip(), None
except requests.exceptions.RequestException as e:
return None, f"Error communicating with API: {e}"
except (KeyError, IndexError, Exception) as e:
return None, f"Error processing API response: {e}"
@llm.route("/generate_script", methods=["POST"])
@login_required
def generate_script():
try:
natural_query = request.json.get('natural_query')
if not natural_query:
return jsonify({"error": "natural_query is required"}), 400
script_content, error = _generate_script_from_natural_language(natural_query)
if error:
return jsonify({"error": error}), 500
return jsonify({"script_content": script_content})
except Exception as e:
return jsonify({'error': str(e)}), 500