app.py

import streamlit as st
import streamlit_authenticator as stauth
from deta import Deta
import yaml
from yaml.loader import SafeLoader
import os
from cryptography.fernet import Fernet

from free_speech_app.DataLoadDb import *
from free_speech_app.FreeSpeechPromptsResponses import *
from langchain.chat_models import ChatOpenAI

#connect to/create Deta user database
deta = Deta(st.secrets["deta_key"])
db = deta.Base("user_data")

#fernet key (generated locally, stored in streamlit secrets)
fernet = Fernet(bytes(st.secrets["fernet_key"],'utf-8'))

#activeloop_token
os.environ["ACTIVELOOP_TOKEN"] = st.secrets["deeplake_key"]

config_drive = deta.Drive("passwords")
config = config_drive.get("config.yaml").read()

config = yaml.load(config, Loader=SafeLoader)

# Create an authenticator
authenticator = stauth.Authenticate(
    config['credentials'],
    config['cookie']['name'],
    config['cookie']['key'],
    config['cookie']['expiry_days'],
    config['preauthorized']
)

def get_user_data(user):
    data = db.fetch().items
    for person in data:
        if person['key'] == user:
            return person
    return None

def encrypt(api_key: str, fernet) -> bytes:
    """Encrypt the API key."""
    return fernet.encrypt(api_key.encode())

def decrypt(encrypted_api_key: bytes, fernet) -> str:
    """Decrypt the encrypted API key."""
    return fernet.decrypt(encrypted_api_key).decode()

# Render the login module
name, authentication_status, username = authenticator.login('Login', 'main')

# If the user is authenticated
if authentication_status:
    authenticator.logout('Logout', 'main', key='unique_key')
    st.write(f'Welcome *{name}*')

    # Sidebar for navigation
    page = st.sidebar.radio("Choose a page", ["OpenAI API Key Setup", "Account Setup", "Respond to Post"])

    # Fetch user data from the database
    user_data = get_user_data(username)

    if page == "Account Setup":

        st.title("Account Setup")
        st.markdown("Please use this page to provide your OpenAI API Key, Principles and Writing Style. **Please make sure to press the Save Changes button after providing the information.**")
        
    
        # Input boxes with existing data
    
        if 'api_key' not in st.session_state:
            st.session_state.api_key = ""
        api_input = st.text_input("OpenAI API Key", value=decrypt(user_data["api_key"].encode()[2:-1], fernet) if user_data and "api_key" in user_data else "", type="password")
        encrypted_api_key = str(encrypt(api_input, fernet))
        st.session_state.api_key = api_input
        
        principles = st.text_input("My Principles", placeholder = "Enter the main principles of your life you wish this response to uphold", value=user_data["principles"] if user_data and "principles" in user_data else "")
        writing_style = st.text_input("My Writing Style (Paste Examples)", placeholder = "Provide examples of your writing style here", value=user_data["writing_style"] if user_data and "writing_style" in user_data else "")
        sources = st.text_input("Sources (Provide all sources you would like to use)", value=st.session_state.sources if 'sources' in st.session_state else '', key = 'sources_key')
    
        # Update button
        if st.button("Save Changes"):
            db.put({"key": username, "principles": principles, "writing_style": writing_style, "sources": sources, "api_key": encrypted_api_key})
        
    if page == "OpenAI API Key Setup":
        st.title("OpenAI API Key Setup")

        st.header('What is an API key?')
        st.write('An API (Application Programming Interface) key is like a password that allows you to access certain functions or data from a website or service. Many sites use API keys to identify you and control access to their APIs.')

        st.header('Why do you need an API key?')
        st.write('API keys allow sites to track usage and prevent abuse of their services. They help keep things secure. When you request an API key, the site knows the calls are coming from you.')

        image = 'apikeyex.png'
        st.header('How to get an OpenAI API key:')
        st.write('1. Go to https://platform.openai.com/account/api-keys') 
        st.write('2. Log in or create an OpenAI account if you do not have one')
        st.write('3. Click "Create new secret key" and give your key a name')
        st.image(image, caption=None, width=None, use_column_width=None, clamp=False, channels="RGB", output_format="auto")
        st.write('4. Copy the generated API key and keep it private like a password')

        st.header('Using your API key')
        st.write('When making calls to the OpenAI API, include your API key in the request headers or parameters to authenticate.')
        st.code('headers = {"Authorization": f"Bearer {YOUR_API_KEY}"}')

        st.warning('Treat your API key like a secret! Do not share it publicly.')


    elif page == "Respond to Post":
        st.title("Respond to Post")
        
        left_col, right_col = st.columns(2)
        
        # Input boxes

        with right_col: 
            background_info = st.text_area("Background information on original post (references, relevant information, best practices for responding)", height = 700, value=st.session_state.background_info if 'background_info' in st.session_state else '', key = 'background_info_key')

        with left_col:
            original_post = st.text_area("Paste Original Post Here \n", height=100)
            
            chat_mdl = None
            draft_response = ''
    
            # Check if the "Submit" button is clicked
            if st.button("Submit"):
                if st.session_state.api_key:
                    os.environ["OPENAI_API_KEY"] = st.session_state.api_key
                    # add condition to check for passphrase to allow use of DSI api key stored in secrets
                    if (os.environ["OPENAI_API_KEY"] == st.secrets["secret_passphrase"]):
                        os.environ["OPENAI_API_KEY"] = st.secrets["dsi_openai_key"]
                    chat_mdl = ChatOpenAI(model_name='gpt-4', temperature=0.1)
        
                if chat_mdl is not None:
                    if user_data is None:
                        draft_response, background_text, sources_text = generate_custom_response(original_post, chat_mdl, "", "")
                        st.session_state.draft_response = draft_response.content
                        st.session_state.background_text = background_text
                        st.session_state.sources_text = sources_text
                        st.session_state.background_info = background_text
                        st.session_state.sources = sources_text
                        st.rerun()
                    else:
                        draft_response, background_text, sources_text = generate_custom_response(original_post, chat_mdl, user_data['principles'], user_data['writing_style'])
                        st.session_state.draft_response = draft_response.content
                        st.session_state.background_text = background_text
                        st.session_state.sources_text = sources_text
                        st.session_state.background_info = background_text
                        st.session_state.sources = sources_text
                        st.rerun()
                        
            
            # Ensure session state variables are initialized
            if 'draft_response' not in st.session_state:
                st.session_state.draft_response = ''
            if 'regenerate_prompt' not in st.session_state:
                st.session_state.regenerate_prompt = ''
            
            # Output from function
            response_textarea = st.text_area(
                label="Draft Response. Please edit here or prompt suggestions in the box below.",
                value=st.session_state.draft_response if 'draft_response' in st.session_state else '',
                height=350,
                key='draft_response_key'
            )
                        
            # Initialization of the regeneration flag
            if 'is_regenerating' not in st.session_state:
                st.session_state.is_regenerating = False
            
            # Check if the app is in the "regeneration" phase
            if st.session_state.is_regenerating:
                # Display the regenerated response explicitly
                regenerate_prompt = st.text_area(
                    "Request a new draft",
                    value=st.session_state.regenerate_prompt,
                    placeholder="You may edit the regenerated draft directly above, or request further changes here.",
                    height=100,
                    key='regenerate_prompt_key'
                )
                # Reset the regeneration flag
                st.session_state.is_regenerating = False
            else:
                # Normal behavior: display the text area for manual input
                regenerate_prompt = st.text_area(
                    "Request a new draft",
                    placeholder="You may edit the draft directly above, or request a new draft with additional guidance here.",
                    height=100,
                    key='regenerate_prompt_key'
                )

            if (draft_response is not None) and (regenerate_prompt is not None):
                if st.button("Regenerate"):
                    if st.session_state.api_key:
                        os.environ['OPENAI_API_KEY'] = st.session_state.api_key
                        # add condition to check for passphrase to allow use of DSI api key stored in secrets
                        if (os.environ["OPENAI_API_KEY"] == st.secrets["secret_passphrase"]):
                            os.environ["OPENAI_API_KEY"] = st.secrets["dsi_openai_key"]
                        chat_mdl = ChatOpenAI(model_name='gpt-4', temperature=0.1)
                    
                    if chat_mdl is not None:
                        updated_response = regenerate_custom_response(chat_mdl, regenerate_prompt, st.session_state.draft_response).content    
                        st.session_state.regenerate_prompt = updated_response
                        st.session_state.is_regenerating = True

                    st.rerun()
                        
                
elif authentication_status is False:
    st.error('Username/password is incorrect')

elif authentication_status is None:
    st.warning('Please enter your username and password')
    
    try:
        if authenticator.register_user('New User Registration', preauthorization=False):
            st.success('User Registered Successfully! Please log in above.')
    except Exception as e:
        st.error(e)

with open('config.yaml', 'w') as file:
    yaml.dump(config, file, default_flow_style=False)

config_drive.put("config.yaml", path = "config.yaml")