app.py

import streamlit as st
import pandas as pd
import random
import numpy as np


def build_dataframe(rows_count=100):
    """
    Creates columns with random data.
    """
    data = {
        'impressions': np.random.randint(low=111, high=10000, size=rows_count),
        'clicks': np.random.randint(low=0, high=1000, size=rows_count),
        'customer': random.choices(['ShirtsInc', 'ShoesCom'], k=rows_count)
    }

    df = pd.DataFrame(data)
    # add a date column and calculate the weekday of each row
    df['date'] = pd.date_range(start='1/1/2018', periods=rows_count)

    return df


data_df = build_dataframe()

query_params = st.experimental_get_query_params()
# There is only one value for each parameter, retrieve the one at # # index 0
username = query_params.get('username', None)[0]
password = query_params.get('password', None)[0]
view = query_params.get('view', None)[0]

# Super basic (and not recommended) way to store the credentials
# Just for illustrative purposes!
credentials = {
    'ShoesCom': 'shoespassword',
    'ShirtsInc': 'shirtspassword'
}

logged_in = False

# Check that the username exists in the "database" and that the provided password matches
if username in credentials and credentials[username] == password:
    logged_in = True

if not logged_in:
    # If credentials are invalid show a message and stop rendering the webapp
    st.warning('Invalid credentials')
    st.stop()

available_views = ['report']
if view not in available_views:
    # I don't know which view do you want. Beat it.
    st.warning('404 Error')
    st.stop()
# The username exists and the password matches!
# Also, the required view exists
# Show the webapp

st.title('Streamlit routing dashboard')

# IMPORTANT: show only the data of the logged in customer
st.dataframe(data_df[data_df['customer'] == username])