app.py

from datetime import datetime

import streamlit as st
import streamlit_authenticator as stauth
import yaml
from yaml.loader import SafeLoader

from sections.software_engineer_basics import *

st.set_page_config(page_title="SAAS Template App", page_icon="🧊", layout="wide")

with open("config.yaml") as file:
    config = yaml.load(file, Loader=SafeLoader)

authenticator = stauth.Authenticate(
    config["credentials"],
    config["cookie"]["name"],
    config["cookie"]["key"],
    config["cookie"]["expiry_days"],
    config["preauthorized"],
)


# Credit: Time
def current_year():
    now = datetime.now()
    return now.year


with st.sidebar:
    if not st.session_state["authentication_status"]:
        st.markdown(
            """
            # Welcome to **Name of App** 🎶🤖

            Introduction / Instruction Manual ...🚀

            ### 🖱️Press "R" on your keyboard⌨️ to rerun the app for faster loading 🔄.

            ### 🔒Sample login info - User: "jsmith" | Password: "abc"

            """
        )

        # Default video
        st.write(
            "👋 Guide to Data Science, Machine Learning, and Artificial Intelligence!"
        )

        with st.expander("Login 🔒", expanded=True):
            # authenticator.login("Login", "main")
            authenticator.login()

            if st.session_state["authentication_status"]:
                # authenticator.logout("Logout", "main", key="unique_key_login")
                authenticator.logout()
                st.write(f'Welcome *{st.session_state["name"]}*')
                st.title(
                    "You logged in! You can choose a session in the bottom of the sidebar and view content."
                )
            elif st.session_state["authentication_status"] is False:
                st.error("Username/password is incorrect")
            elif st.session_state["authentication_status"] is None:
                st.warning("Please enter your username and password")

        with st.expander("Reset password 😕"):
            if st.session_state["authentication_status"]:
                try:
                    if authenticator.reset_password(
                        st.session_state["username"], "Reset password"
                    ):
                        st.success("Password modified successfully")
                except Exception as e:
                    st.error(e)

        with st.expander("Forgot password 😕"):
            try:
                (
                    username_of_forgotten_password,
                    email_of_forgotten_password,
                    new_random_password,
                ) = authenticator.forgot_password("Forgot password")
                if username_of_forgotten_password:
                    st.success("New password to be sent securely")
                    # Random password should be transferred to user securely
                else:
                    st.error("Username not found")
            except Exception as e:
                st.error(e)

        with st.expander("Update user 😋"):
            if st.session_state["authentication_status"]:
                try:
                    if authenticator.update_user_details(
                        st.session_state["username"], "Update user details"
                    ):
                        st.success("Entries updated successfully")
                except Exception as e:
                    st.error(e)

        with st.expander("Register user 😋"):
            try:
                # payment_key = st.text_input("Enter Payment Key:")
                if authenticator.register_user("Register user", preauthorization=False):
                    # if register_user(payment_key):
                    st.success("User registered successfully")
            except Exception as e:
                st.error(e)

            with open("config.yaml", "w") as file:
                yaml.dump(config, file, default_flow_style=False)

        with st.expander("Donation💲"):
            stripe_payment_link = "https://buy.stripe.com/cN2bLGa0faMp5u8fYZ"
            st.markdown(
                f"""
                Want to support me? 😄 Done here using this [link]({stripe_payment_link}).
                """
            )

        # Credit:
        current_year = current_year()  # This will print the current year
        st.markdown(
            f"""
                <h6 style='text-align: left;'>Copyright © 2010-{current_year} Present Yiqiao Yin</h6>
            """,
            unsafe_allow_html=True,
        )

# Main
if st.session_state["authentication_status"]:

    st.markdown(
        """
        # Homepage 🎶🤖

        Content goes here.

        """
    )

    page_names_to_funcs = {
        "Software Engineer Basics": software_engineer_basics
    }

    demo_name = st.sidebar.radio(
        "Choose a topic below:", key="visibility", options=page_names_to_funcs.keys()
    )

    page_names_to_funcs[demo_name]()

    with st.sidebar:
        with st.expander("Login 🔒", expanded=True):
            # authenticator.login("Login", "main")
            authenticator.login()
            st.warning(
                "If you are running this app on HuggingFace, you'll need to just refresh your screen to log out."
            )
            if st.session_state["authentication_status"]:
                try:
                    # authenticator.logout("Logout", "main", key="unique_key")
                    authenticator.logout()
                except KeyError:
                    pass  # ignore it
                except Exception as err:
                    st.error(f"Unexpected exception {err}")
                    raise Exception(err)  # but not this, let's crash the app

                st.write(f'Welcome *{st.session_state["name"]}*')
                st.title(
                    "You logged in! You can choose a session in the bottom of the sidebar and view content."
                )
                st.markdown(
                    "### 🖱️Press "
                    R" on your keyboard⌨️ to rerun the app for faster loading 🔄."
                )

                
            elif st.session_state["authentication_status"] is False:
                st.error("Username/password is incorrect")
            elif st.session_state["authentication_status"] is None:
                st.warning("Please enter your username and password")