Update app.py

app.py

@@ -1,77 +1,84 @@
 import streamlit as st
-import json
-
-def load_contacts():
-    """Load contacts from a JSON file."""
-    try:
-        with open("contacts.json", "r") as f:
-            return json.load(f)
-    except FileNotFoundError:
-        return {}
-
-def save_contacts(contacts):
-    """Save contacts to a JSON file."""
-    with open("contacts.json", "w") as f:
-        json.dump(contacts, f)
-
-# Load existing contacts
-contacts = load_contacts()
-
-# Streamlit app configuration
-st.set_page_config(page_title="Chat App", layout="wide")
-
-st.title("Chat App")
-
-# Sidebar: Add Contact Section
-st.sidebar.header("Add a New Contact")
-with st.sidebar.form("add_contact_form"):
-    contact_name = st.text_input("Contact Name")
-    contact_number = st.text_input("Phone Number")
-    submit_contact = st.form_submit_button("Add Contact")
-
-    if submit_contact:
-        if contact_name and contact_number:
-            contacts[contact_name] = {"number": contact_number, "messages": []}
-            save_contacts(contacts)
-            st.sidebar.success(f"Contact '{contact_name}' added successfully!")
-        else:
-            st.sidebar.error("Please provide both name and number.")
-
-# Main Section: Chat Functionality
-st.header("Chat with Your Contacts")
-
-selected_contact = st.selectbox(
-    "Select a contact to chat with", options=["Select"] + list(contacts.keys())
-)
-
-if selected_contact != "Select":
-    contact_data = contacts[selected_contact]
-
-    st.subheader(f"Chat with {selected_contact}")
-
-    # Display chat history
-    chat_history = st.empty()
-    if contact_data["messages"]:
-        chat_history.write("\n".join(contact_data["messages"]))
-
-    # Input message section
-    with st.form("send_message_form"):
-        message = st.text_input("Type your message")
-        send_message = st.form_submit_button("Send")
-
-        if send_message:
-            if message.strip():
-                contact_data["messages"].append(f"You: {message}")
-                save_contacts(contacts)
-                chat_history.write("\n".join(contact_data["messages"]))
+from datetime import datetime
+
+# App title
+st.title("Chat and Call Application")
+
+# Sidebar for navigation
+menu = ["Home", "Add Contact", "Chat", "Call"]
+choice = st.sidebar.selectbox("Menu", menu)
+
+# Global variables (for simulation)
+if 'contacts' not in st.session_state:
+    st.session_state['contacts'] = {}
+if 'chat_history' not in st.session_state:
+    st.session_state['chat_history'] = {}
+
+# Home page
+if choice == "Home":
+    st.header("Welcome to the Chat and Call App")
+    st.write("Use the sidebar to navigate between features.")
+
+# Add Contact page
+elif choice == "Add Contact":
+    st.header("Add a New Contact")
+    with st.form("add_contact_form"):
+        name = st.text_input("Contact Name")
+        phone = st.text_input("Phone Number")
+        submit = st.form_submit_button("Add Contact")
+
+        if submit:
+            if name and phone:
+                st.session_state['contacts'][name] = phone
+                st.success(f"Contact {name} added successfully!")
             else:
-                st.error("Message cannot be empty.")
-
-# Footer
-st.sidebar.markdown("---")
-st.sidebar.markdown("### Instructions")
-st.sidebar.markdown(
-    "1. Use the sidebar to add new contacts.\n"
-    "2. Select a contact from the dropdown to start chatting.\n"
-    "3. Your chat history is saved locally."
-)
+                st.error("Please provide both name and phone number.")
+
+# Chat page
+elif choice == "Chat":
+    st.header("Chat with Your Contacts")
+
+    if not st.session_state['contacts']:
+        st.warning("No contacts available. Please add contacts first.")
+    else:
+        contact = st.selectbox("Select a Contact", list(st.session_state['contacts'].keys()))
+
+        if contact:
+            st.write(f"Chatting with: {contact}")
+            chat_key = contact
+
+            # Display chat history
+            if chat_key not in st.session_state['chat_history']:
+                st.session_state['chat_history'][chat_key] = []
+
+            chat_history = st.session_state['chat_history'][chat_key]
+            for message in chat_history:
+                st.write(message)
+
+            # Input for sending a message
+            with st.form("send_message_form"):
+                message = st.text_input("Enter your message")
+                send = st.form_submit_button("Send")
+
+                if send:
+                    if message:
+                        timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+                        chat_history.append(f"You ({timestamp}): {message}")
+                        st.session_state['chat_history'][chat_key] = chat_history
+                        st.experimental_rerun()
+                    else:
+                        st.error("Message cannot be empty.")
+
+# Call page
+elif choice == "Call":
+    st.header("Make a Call")
+
+    if not st.session_state['contacts']:
+        st.warning("No contacts available. Please add contacts first.")
+    else:
+        contact = st.selectbox("Select a Contact to Call", list(st.session_state['contacts'].keys()))
+
+        if contact:
+            st.write(f"Calling {contact}...")
+            st.button("End Call", on_click=lambda: st.success(f"Call with {contact} ended."))
+