utils.py

import streamlit as st
import pandas as pd
import project_config
import base64


@st.cache_data(show_spinner = 'Loading knowledge graph nodes...')
def load_kg():
    # with st.spinner('Loading knowledge graph...'):
    kg_nodes = pd.read_csv(project_config.DATA_DIR / 'kg_nodes.csv', dtype = {'node_index': int}, low_memory = False)
    return kg_nodes


@st.cache_data(show_spinner = 'Loading knowledge graph edges...')
def load_kg_edges():
    # with st.spinner('Loading knowledge graph...'):
    kg_edges = pd.read_csv(project_config.DATA_DIR / 'kg_edges.csv', dtype = {'edge_index': int, 'x_index': int, 'y_index': int}, low_memory = False)
    return kg_edges


def capitalize_after_slash(s):
    # Split the string by slashes first
    parts = s.split('/')
    # Capitalize each part separately
    capitalized_parts = [part.title() for part in parts]
    # Rejoin the parts with slashes
    capitalized_string = '/'.join(capitalized_parts).replace('_', ' ')
    return capitalized_string


# From https://stackoverflow.com/questions/73251012/put-logo-and-title-above-on-top-of-page-navigation-in-sidebar-of-streamlit-multi
# See also https://arnaudmiribel.github.io/streamlit-extras/extras/app_logo/ 
@st.cache_data()
def get_base64_of_bin_file(png_file):
    with open(png_file, "rb") as f:
        data = f.read()
    return base64.b64encode(data).decode()


def build_markup_for_logo(
    png_file,
    background_position="50% 10%",
    margin_top="10%",
    padding="20px",
    image_width="80%",
    image_height="",
):
    binary_string = get_base64_of_bin_file(png_file)
    return """
            <style>
                [data-testid="stSidebarNav"] {
                    background-image: url("data:image/png;base64,%s");
                    background-repeat: no-repeat;
                    background-position: %s;
                    margin-top: %s;
                    padding: %s;
                    background-size: %s %s;
                }
            </style>
            """ % (
        binary_string,
        background_position,
        margin_top,
        padding,
        image_width,
        image_height,
    )


def add_logo(png_file):
    logo_markup = build_markup_for_logo(png_file)
    st.markdown(
        logo_markup,
        unsafe_allow_html=True,
    )