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import streamlit as st
import time
# In-memory "database" for simplicity
users_db = {
'1': {'password': '1', 'name': '1', 'age': 1, 'favorite_color': 'blue'}
}
def register_user(username, password, name, age):
"""Register a new user."""
global users_db
if username in users_db:
return False
users_db[username] = {'password': password, 'name': name, 'age': age}
return True
def login_user(username, password):
"""Authenticate a user."""
if username in users_db and users_db[username]['password'] == password:
st.session_state['logged_in'] = True
st.session_state['user'] = users_db[username]
print('login success')
return True
print('login faild')
print(users_db)
return False
def logout_user():
"""Log out the current user."""
st.session_state['logged_in'] = False
st.session_state.pop('user', None)
st.session_state.pop('step1_done', None)
st.session_state.pop('step2_done', None)
# st.experimental_rerun()
def show_registration():
"""Display the registration form."""
st.header("Register")
reg_username = st.text_input("Username", key="reg_user")
reg_password = st.text_input("Password", type="password", key="reg_pass")
reg_name = st.text_input("Name", key="reg_name")
reg_age = st.number_input("Age", min_value=0, max_value=120, step=1, key="reg_age")
if st.button("Register"):
if register_user(reg_username, reg_password, reg_name, reg_age):
st.success("Registration successful. Please log in.")
else:
st.error("Username already exists. Please choose another one.")
def show_login():
"""Display the login form."""
st.header("Login")
username = st.text_input("Username", key="login_user")
password = st.text_input("Password", type="password", key="login_pass")
if st.button("Login"):
if login_user(username, password):
st.success(f"Welcome back, {st.session_state['user']['name']}!")
else:
st.error("Invalid username or password.")
def show_task():
"""Display the multi-step task."""
st.title(f"Welcome, {st.session_state['user']['name']}!")
# Step 1: Confirm personal details
st.header("Step 1: Confirm Your Details")
name = st.text_input("Name", value=st.session_state['user']['name'])
age = st.number_input("Age", value=st.session_state['user']['age'], min_value=0, max_value=120, step=1)
if st.button("Submit Step 1"):
st.session_state['user']['name'] = name
st.session_state['user']['age'] = age
st.session_state['step1_done'] = True
st.write(f"Hello, {name}. You are {age} years old.")
time.sleep(1) # Simulate a processing delay
# Step 2: Update favorite color
if 'step1_done' in st.session_state:
st.header("Step 2: Update Your Favorite Color")
favorite_color = st.text_input("What's your favorite color?", value=st.session_state['user']['favorite_color'])
if st.button("Submit Step 2"):
st.session_state['user']['favorite_color'] = favorite_color
st.session_state['step2_done'] = True
st.write(f"Got it! Your favorite color is {favorite_color}.")
time.sleep(1) # Simulate a processing delay
# Step 3: Final Confirmation and Real-time Processing
if 'step2_done' in st.session_state:
st.header("Step 3: Final Confirmation")
confirm = st.checkbox("Confirm and process the data")
if confirm:
st.write("Processing data...")
progress_bar = st.progress(0)
# Simulate a real-time processing task
for i in range(100):
progress_bar.progress(i + 1)
time.sleep(0.05) # Simulate real-time data streaming
st.success("Task Completed!")
st.write(f"Summary: {name}, {age} years old, likes {favorite_color}.")
# Option to logout
if st.button("Logout"):
logout_user()
def main():
"""Main function to control the app flow."""
st.title("Streamlit Application with Login and Multi-step Task")
if 'logged_in' not in st.session_state:
st.session_state['logged_in'] = False
if not st.session_state['logged_in']:
show_registration()
show_login()
else:
show_task()
if __name__ == "__main__":
main()
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