import os
import io
import requests
import streamlit as st
from openai import OpenAI
from PyPDF2 import PdfReader
import urllib.parse
from dotenv import load_dotenv
from openai import OpenAI
from io import BytesIO
from streamlit_extras.colored_header import colored_header
from streamlit_extras.add_vertical_space import add_vertical_space
from streamlit_extras.switch_page_button import switch_page
import json
# ---------------------- Configuration ----------------------
st.set_page_config(page_title="Building Regulations Chatbot", layout="wide", page_icon="🏗️", initial_sidebar_state="expanded")
# Load environment variables from .env file
load_dotenv()
# Set OpenAI API key
client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
# ---------------------- Session State Initialization ----------------------
if 'pdf_contents' not in st.session_state:
st.session_state.pdf_contents = []
if 'chat_history' not in st.session_state:
st.session_state.chat_history = []
if 'processed_pdfs' not in st.session_state:
st.session_state.processed_pdfs = False
if 'id_counter' not in st.session_state:
st.session_state.id_counter = 0
if 'assistant_id' not in st.session_state:
st.session_state.assistant_id = None
if 'thread_id' not in st.session_state:
st.session_state.thread_id = None
# ---------------------- Helper Functions ----------------------
def get_vector_stores():
try:
client = OpenAI()
vector_stores = client.beta.vector_stores.list()
return vector_stores
except Exception as e:
return f"Error retrieving vector stores: {str(e)}"
def fetch_pdfs(city_code):
url = f"http://91.203.213.50:5000/oereblex/{city_code}"
response = requests.get(url)
if response.status_code == 200:
data = response.json()
print("First data:", data.get('data', [])[0] if data.get('data') else None)
return data.get('data', [])
else:
st.error(f"Failed to fetch PDFs for city code {city_code}")
return None
def download_pdf(url):
# Add 'https://' scheme if it's missing
if not url.startswith(('http://', 'https://')):
url = 'https://' + url
try:
response = requests.get(url)
response.raise_for_status() # Raise an exception for bad status codes
# Generate a unique filename
filename = f"downloaded_pdf_{st.session_state.id_counter}.pdf"
st.session_state.id_counter += 1
# Save the PDF content to a file
with open(filename, 'wb') as f:
f.write(response.content)
return filename
except requests.RequestException as e:
st.error(f"Failed to download PDF from {url}. Error: {str(e)}")
return None
# Helper function to upload file to OpenAI
def upload_file_to_openai(file_path):
try:
file = client.files.create(
file=open(file_path, 'rb'),
purpose='assistants'
)
return file.id
except Exception as e:
st.error(f"Failed to upload file {file_path}. Error: {str(e)}")
return None
def create_assistant():
assistant = client.beta.assistants.create(
name="Building Regulations Assistant",
instructions="You are an expert on building regulations. Use the provided documents to answer questions accurately.",
model="gpt-4o-mini",
tools=[{"type": "file_search"}]
)
st.session_state.assistant_id = assistant.id
return assistant.id
def chat_with_assistant(file_ids, user_message):
for file_id in file_ids:
print("File ID:", file_id)
# Create a thread and attach the file to the message
print("final file id:", file_id)
attachments = [{"file_id": file_id, "tools": [{"type": "file_search"}]} for file_id in file_ids]
print("attachments:", attachments)
if st.session_state.thread_id is None:
thread = client.beta.threads.create(
messages=[
{
"role": "user",
"content": user_message,
"attachments": attachments,
}
]
)
st.session_state.thread_id = thread.id
else:
thread = client.beta.threads.messages.create(
thread_id=st.session_state.thread_id,
role="user",
content=user_message,
attachments=attachments
)
# The thread now has a vector store with that file in its tool resources.
print(thread.tool_resources.file_search)
print("assistant_id:", st.session_state.assistant_id)
print("thread_id:", thread.id)
run = client.beta.threads.runs.create_and_poll(
thread_id=thread.id, assistant_id=st.session_state.assistant_id
)
print("run:", run)
messages = list(client.beta.threads.messages.list(thread_id=thread.id, run_id=run.id))
message_content = messages[0].content[0].text
annotations = message_content.annotations
citations = []
for index, annotation in enumerate(annotations):
message_content.value = message_content.value.replace(annotation.text, f"[{index}]")
if file_citation := getattr(annotation, "file_citation", None):
cited_file = client.files.retrieve(file_citation.file_id)
citations.append(f"[{index}] {cited_file.filename}")
print(message_content.value)
print("\n".join(citations))
return message_content.value, citations
# ---------------------- Streamlit App ----------------------
page = st.sidebar.selectbox("Choose a page", ["Home", "Documents", "Admin"])
if page == "Home":
st.title("🏗️ Building Regulations Chatbot", anchor=False)
# Sidebar improvements
with st.sidebar:
colored_header("📄 Selected Documents", description="Documents for chat")
if 'selected_pdfs' in st.session_state and st.session_state.selected_pdfs:
for pdf in st.session_state.selected_pdfs:
st.write(f"- {pdf['doc_title']}")
else:
st.write("No documents selected. Please go to the Documents page.")
# Main chat area improvements
colored_header("💬 Chat", description="Ask questions about building regulations")
# Display chat messages with improved styling
for chat in st.session_state.chat_history:
with st.container():
if chat['role'] == 'user':
st.markdown(f"""
""", unsafe_allow_html=True)
else:
st.markdown(f"""
Assistant
{chat['content']}
""", unsafe_allow_html=True)
# Chat input improvements
with st.form("chat_form", clear_on_submit=True):
user_input = st.text_area("Ask a question about building regulations...", height=100)
col1, col2 = st.columns([3, 1])
with col2:
submit = st.form_submit_button("Send", use_container_width=True)
if submit and user_input.strip() != "":
# Add user message to chat history
st.session_state.chat_history.append({"role": "user", "content": user_input})
if not st.session_state.file_ids:
st.error("Please process PDFs first.")
else:
with st.spinner("Generating response..."):
try:
response, citations = chat_with_assistant(st.session_state.file_ids, user_input)
# Add assistant response to chat history
st.session_state.chat_history.append({"role": "assistant", "content": response+"\n\n"+"\n".join(citations)})
except Exception as e:
st.error(f"Error generating response: {str(e)}")
# Rerun the app to update the chat display
st.rerun()
# Footer improvements
add_vertical_space(2)
st.markdown("---")
col1, col2 = st.columns(2)
with col1:
st.caption("Powered by OpenAI GPT-4 and Pinecone")
with col2:
st.caption("© 2023 Your Company Name")
elif page == "Documents":
st.title("📚 Document Selection")
city_code_input = st.text_input("Enter city code:", key="city_code_input")
load_documents_button = st.button("Load Documents", key="load_documents_button")
if load_documents_button and city_code_input:
with st.spinner("Fetching PDFs..."):
pdfs = fetch_pdfs(city_code_input)
if pdfs:
st.session_state.available_pdfs = pdfs
st.success(f"Found {len(pdfs)} PDFs")
else:
st.error("No PDFs found")
if 'available_pdfs' in st.session_state:
st.write(f"Total PDFs: {len(st.session_state.available_pdfs)}")
selected_pdfs = []
for pdf in st.session_state.available_pdfs:
title = f"{pdf.get('doc_title', 'Untitled')} - {pdf.get('doc_type', 'No type')}"
if pdf.get('number'):
title += f" ({pdf['number']})"
if st.checkbox(title, key=f"pdf_{pdf['file_href']}"):
selected_pdfs.append(pdf)
if st.button("Process Selected PDFs"):
if selected_pdfs:
st.session_state.selected_pdfs = selected_pdfs
st.session_state.assistant_id = create_assistant()
with st.spinner("Processing PDFs and creating/updating assistant..."):
file_ids = []
for pdf in selected_pdfs:
file_name = download_pdf(pdf['file_href'])
if file_name:
file_path = f"./{file_name}"
file_id = upload_file_to_openai(file_path)
if file_id:
file_ids.append(file_id)
else:
st.warning(f"Failed to upload {pdf['doc_title']}. Skipping this file.")
else:
st.warning(f"Failed to download {pdf['doc_title']}. Skipping this file.")
st.session_state.file_ids = file_ids
st.success("PDFs processed successfully. You can now chat on the Home page.")
else:
st.warning("Select at least one PDF.")
if st.button("Go to Home"):
switch_page("Home")
elif page == "Admin":
st.title("🔧 Admin Panel")
colored_header("Vector Stores Information", description="List of all vector stores")
vector_stores = get_vector_stores()
json_vector_stores = json.dumps([vs.model_dump() for vs in vector_stores])
st.write(json_vector_stores)
# Add a button to go back to the main page
if st.button("Back to Home"):
switch_page("Home")