145 lines
4.7 KiB
Python
145 lines
4.7 KiB
Python
import streamlit as st
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import yaml
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import time
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import os
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from opcua_connector import opcua_connector
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# Load config early for password if present
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app_cfg = yaml.safe_load(open('./cfg.yaml')) or {}
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# Page configuration
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st.set_page_config(
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page_title="OPC UA Robot Control Dashboard",
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page_icon="🤖",
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layout="wide",
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initial_sidebar_state="expanded"
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)
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# Custom CSS for better styling (external stylesheet)
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with open('styles.css') as f:
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st.markdown(f"<style>{f.read()}</style>", unsafe_allow_html=True)
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def execute_button_action(button_name):
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"""Execute button action with proper error handling"""
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if st.session_state.opcon is None:
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return False
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if button_name == 'INIT':
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st.session_state.opcon.adapt_access_rights()
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print(f"🔧 INIT button pressed - Access rights adapted")
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else:
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st.session_state.opcon.press_btn(button_name)
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print(f"🔘 {button_name} button pressed")
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return True
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# Re-validate connection status each render (do this before rendering UI)
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def is_opcua_connected(conn) -> bool:
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try:
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return bool(conn and conn.check_connection() == 1)
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except Exception:
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return False
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# Initialize session state
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if 'opcon' not in st.session_state:
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st.session_state.opcon = None
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if 'connection_status' not in st.session_state:
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st.session_state.connection_status = "Disconnected"
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# Update connection status on each render
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st.session_state.connection_status = (
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"Connected" if is_opcua_connected(st.session_state.opcon) else "Disconnected"
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)
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if 'authenticated' not in st.session_state:
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st.session_state.authenticated = False
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# Sidebar
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with st.sidebar:
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st.write(f"Status: {st.session_state.connection_status}")
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# Initialize button
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if st.button("🔌 Initialize Connection", use_container_width=True):
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with st.spinner("Initializing connection..."):
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try:
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if st.session_state.opcon is None:
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st.session_state.opcon = opcua_connector(app_cfg)
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st.session_state.opcon.connect()
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if st.session_state.opcon.check_connection() == 1:
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st.session_state.connection_status = "Connected"
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print("🎉 Connection initialized successfully")
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else:
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st.session_state.connection_status = "Disconnected"
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print("❌ Connection failed")
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except Exception as e:
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print(f"❌ Failed to initialize connection: {e}")
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st.session_state.connection_status = "Disconnected"
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st.rerun()
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# Disconnect button
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if st.button("🔌 Disconnect", use_container_width=True):
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try:
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if st.session_state.opcon:
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st.session_state.opcon.disconnect()
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print("🔌 Disconnected from OPC UA server")
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except Exception as e:
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print(f"⚠️ Warning during disconnect: {e}")
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st.session_state.opcon = None
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st.session_state.connection_status = "Disconnected"
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print("🔌 Connection reset")
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st.rerun()
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st.divider()
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# Password gate
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# Prefer cfg.yaml cred.dashboard.password, else env DASHBOARD_PASSWORD, else 'admin'
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expected_password = (
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(app_cfg.get('cred', {}).get('dashboard', {}) or {}).get('password')
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or 'admin'
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)
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ui_locked = not st.session_state.authenticated
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if ui_locked:
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pwd = st.text_input("Enter Dashboard Password", type="password")
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if st.button("Login", use_container_width=True):
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if pwd == expected_password:
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st.session_state.authenticated = True
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st.rerun()
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else:
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st.error("Wrong password")
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if not ui_locked:
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# Button container
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st.markdown('<div class="button-container">', unsafe_allow_html=True)
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# Create columns for buttons
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btn_col1, btn_col2, btn_col3, btn_col4 = st.columns(4)
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buttons_disabled = st.session_state.connection_status != "Connected"
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with btn_col1:
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if st.button("🔧\n\nINIT", key="init_btn", use_container_width=True, disabled=buttons_disabled):
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execute_button_action('INIT')
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with btn_col2:
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if st.button("▶️\n\nSTART", key="start_btn", use_container_width=True, disabled=buttons_disabled):
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execute_button_action('BTN_START')
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with btn_col3:
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if st.button("⏹️\n\nSTOP", key="stop_btn", use_container_width=True, disabled=buttons_disabled):
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execute_button_action('BTN_STOP')
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with btn_col4:
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if st.button("🔄\n\nRESET", key="reset_btn", use_container_width=True, disabled=buttons_disabled):
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execute_button_action('BTN_RESET')
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st.markdown('</div>', unsafe_allow_html=True)
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# Footer removed for minimal UI
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