code_playground.py

import base64
import time
import streamlit as st
from code_editor import code_editor
import requests
import json
from streamlit_ace import st_ace
import subprocess
import os
import tempfile
import dotenv
from dotenv import load_dotenv
load_dotenv()

# Code 2: 
# Supported languages and their file extensions
# Judge0 API configuration

JUDGE0_API_URL = "https://judge0-ce.p.rapidapi.com/submissions"
JUDGE0_API_KEY =  "065c9c9b12mshe3bfa8aa9549b16p11954ajsnda1e6cb80ec4"# Replace with your RapidAPI key
HEADERS = {
    "X-RapidAPI-Key": JUDGE0_API_KEY,
    "X-RapidAPI-Host": "judge0-ce.p.rapidapi.com",
    "Content-Type": "application/json",
}

# Supported languages and their Judge0 language IDs
LANGUAGES = {
    "C": 50,
    "C++": 54,
    "Java": 62,
    "Python": 71,
    "JavaScript": 63,
}

# Function to execute code using Judge0 API
def execute_code(code, language_id):
    # Create a submission
    # code 3: 
    # Function to execute code using Judge0 API
    # Encode the code in base64
    encoded_code = base64.b64encode(code.encode("utf-8")).decode("utf-8")

    # Create a submission
    data = {
        "source_code": encoded_code,
        "language_id": language_id,
        "base64_encoded": True,  # Indicate that the code is base64 encoded
    }
    response = requests.post(
        f"{JUDGE0_API_URL}?base64_encoded=true&wait=false",
        headers=HEADERS,
        json=data,
    )
    if response.status_code != 201:
        return f"Error: Unable to create submission. Status code: {response.status_code}, Response: {response.text}"

    submission_token = response.json()["token"]

    # Poll for the result
    while True:
        result_response = requests.get(
            f"{JUDGE0_API_URL}/{submission_token}?base64_encoded=true",
            headers=HEADERS,
        )
        if result_response.status_code != 200:
            return f"Error: Unable to fetch result. Status code: {result_response.status_code}, Response: {result_response.text}"

        result = result_response.json()
        if result["status"]["id"] not in [1, 2]:  # Status 1 = in queue, 2 = processing
            break
        time.sleep(1)  # Wait before polling again

    # Parse the result
    if result["status"]["id"] == 3:  # Status 3 = accepted
        output = result["stdout"] if result["stdout"] else "No output"
        if output:
            # Decode the output from base64
            output = base64.b64decode(output).decode("utf-8")
        return output
    else:
        error = result["stderr"] if result["stderr"] else result["compile_output"]
        if error:
            # Decode the error from base64
            error = base64.b64decode(error).decode("utf-8")
        return error

# Map languages to Ace Editor language modes
ACE_LANGUAGE_MODES = {
    "C": "c_cpp",
    "C++": "c_cpp",
    "Java": "java",
    "Python": "python",
    "JavaScript": "javascript",
}

def display_code_playground(session, student_id, course_id):
    st.markdown("#### Code Playground")

    # Language selection
    language = st.selectbox("Select Language", list(LANGUAGES.keys()))

    # Code editor
    code = st_ace(
        placeholder="Write your code here...",
        language=ACE_LANGUAGE_MODES[language],
        theme="clouds_midnight",
        key="code-editor",
        font_size=14,
        tab_size=4,
        wrap=True,
        show_gutter=True,
        show_print_margin=True,
        auto_update=False,
        height=300,
    )

    # Run button
    if st.button("Run"):
        if code:
            st.markdown("##### Output")
            with st.spinner("Executing code..."):
                output = execute_code(code, LANGUAGES[language])
                st.code(output, language="text")
        else:
            st.warning("Please write some code before running.")