app.py

import streamlit as st
from streamlit_option_menu import option_menu
from home import dashboard
import os
from pymongo import MongoClient


if 'user' not in st.session_state:
    st.session_state['user'] = 'visitor'
    
    
uri = os.environ["MONGO_CONNECTION_STRING"]

client = MongoClient(uri, tlsCertificateKeyFile="cert.pem")

db = client["reshav"]
col=db["mine"]

try:
    client.admin.command("ping")
    print("Connection Established!")
except Exception as e:
    print(e)

def login():
    st.title("Login")
    data = json.load(open("database/data.json"))
    usrname = st.text_input("Username")
    password = st.text_input("Password", type="password")
    if st.button("Login", key="loginkey"):
        for user in data["users"]:
            if usrname == user["username"] and password == user["password"]:
                st.success("Logged in as {}".format(usrname))
                st.session_state["user"] = "logged"
                flag = True
                st.experimental_rerun()
            else:
                flag = False
                if flag == False:
                    st.error("Invalid username or password")
                    st.stop()
                    
                    
def signup():
    st.title("Signup")
    username = st.text_input("Username")
    password = st.text_input("Password", type="password")
    confirm_password = st.text_input("Confirm Password", type="password")
    if st.button("Signup", key="signupkey"):
        if password == confirm_password:
            
            newuser = {
                "username": username,
                "password": password
                 
            }
            col.insert_one(newuser)
            st.success("Account created")
        else:            
             st.error("Passwords do not match")
           
             
def main():
    if st.session_state["user"] == "visitor":
        option = option_menu(
            menu_title="Authentication",
            options=["Login", "Signup"],
        )
        
        if option == "Login":
            login()
        elif option == "Signup":
            signup()
    elif st.session_state["user"] == "logged":
        dashboard()
                
                
main()