views/intro_screen.py

import streamlit as st
import os
from dotenv import load_dotenv
from views.continue_survey import continue_survey_screen
from db.crud import read

load_dotenv()
VALIDATION_CODE = os.getenv("VALIDATION_CODE")


def validate_username(username: str) -> bool:
    return bool(username.strip())


def validate_code(input_code: str) -> bool:
    """Validate the entered code against the hardcoded validation code"""
    return input_code.strip() == VALIDATION_CODE


def welcome_screen():
    """Display the welcome screen and direct users accordingly."""
    st.title("Welcome to the Feedback Survey")

    username_input = st.text_input("Enter your First name and press TAB:")
    validation_code_input = st.text_input("Enter the validation code to proceed and press ENTER:")

    next_button = st.button("Next")

    if (username_input and validation_code_input) or next_button:
        if validate_username(username_input) and validate_code(validation_code_input):
            st.session_state.username = username_input
        else:
            if not validate_username(username_input):
                st.warning("Invalid Prolific ID. Please check and try again.")
            if not validate_code(validation_code_input):
                st.warning("Invalid validation code. Please check and try again.")