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Main entry point for a Streamlit-based FileCloud Data Processor application that handles authentication, session state management, and navigation between multiple modules including document audit, controlled documents, settings, and reports.

Purpose

This function serves as the central orchestrator for a multi-module Streamlit application. It configures the page layout, manages user authentication state, and routes users to different functional modules based on their selections. The application appears to be a document management system with audit capabilities, controlled document workflows, settings configuration, and reporting features.

Source Code

def main():
    """Main application entry point."""
    # Set up page config
    st.set_page_config(
        page_title="FileCloud Data Processor",
        page_icon="📊",
        layout="wide",
        initial_sidebar_state="expanded"
    )
    
    # Initialize session state if needed
    if 'authenticated' not in st.session_state:
        st.session_state['authenticated'] = False
    
    if 'current_module' not in st.session_state:
        st.session_state['current_module'] = None
    
    # Authentication check
    if not st.session_state['authenticated']:
        login_page()
        return
    
    # Navigate to the selected module
    current_module = st.session_state.get('current_module')
    
    if current_module == 'document_audit':
        document_audit_page()
    elif current_module == 'controlled_docs':
        controlled_docs_navigation()
    elif current_module == 'settings':
        settings_page()
    elif current_module == 'reports':
        reports_page()
    else:
        main_page()

Return Value

No return value (implicitly returns None). The function controls application flow through Streamlit's rendering system and session state management.

Dependencies

• streamlit
• neo4j
• panel
• holoviews
• param
• pandas
• rdkit
• numpy
• langchain_community
• langchain
• langchain_openai
• langchain_core
• sentence_transformers
• openai

Required Imports

import streamlit as st

Conditional/Optional Imports

These imports are only needed under specific conditions:

from controlled_doc_system.ui.document_dashboard import render_document_dashboard

from controlled_doc_system.ui.review_dashboard import render_review_dashboard

from controlled_doc_system.ui.document_form import render_document_form

from controlled_doc_system.utils.context import set_user_context, get_current_user

from controlled_doc_system.core.document_manager import initialize_document_system

Usage Example

import streamlit as st

# Define required page functions
def login_page():
    st.title('Login')
    # Login logic here
    if st.button('Login'):
        st.session_state['authenticated'] = True
        st.rerun()

def main_page():
    st.title('Main Dashboard')
    if st.button('Document Audit'):
        st.session_state['current_module'] = 'document_audit'
        st.rerun()

def document_audit_page():
    st.title('Document Audit')
    st.write('Audit functionality here')

def controlled_docs_navigation():
    st.title('Controlled Documents')
    st.write('Document control system')

def settings_page():
    st.title('Settings')
    st.write('Application settings')

def reports_page():
    st.title('Reports')
    st.write('Reporting dashboard')

# Run the application
if __name__ == '__main__':
    main()

Best Practices

• Ensure all referenced page functions (login_page, document_audit_page, controlled_docs_navigation, settings_page, reports_page, main_page) are properly defined before calling main()
• Initialize Streamlit session state variables before accessing them to avoid KeyError exceptions
• Use st.rerun() or st.experimental_rerun() after changing session state to update the UI
• The function uses early return pattern after login_page() to prevent unauthorized access to other modules
• Session state 'authenticated' should be set to True only after successful authentication
• The 'current_module' session state variable controls which page is displayed and should be set by navigation components
• Page configuration (set_page_config) must be called before any other Streamlit commands
• Consider implementing proper error handling for missing page functions
• Ensure proper cleanup of session state when logging out users

Tags

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