app.py

import streamlit as st
from streamlit_option_menu import  option_menu
import pymongo

class ErrorMSG:
    ERROR_MSG_NONESTR = 0
    ERROR_MSG_NOFOUND = 1
    ERROR_MSG_NONESTREDIT = 2
    
    msg = [
        'Warning: You should input a Task above and select the right Category & Priority',
        'Warning: No such task found, Please check your input agian',
        'Warning: You should input a Task you want to edit and input the right information you want to edit'
    ]

uri = "mongodb+srv://123123:mb123123@cluster.c0bshep.mongodb.net/?retryWrites=true&w=majority"

client = pymongo.MongoClient(uri)
db = client["demo"]
collection = db["class"]

st.set_page_config(page_title="Marble's ToDo List",layout='wide')

st.title('TODO LIST')
st.write('This is a TODO List which allows you to insert, update, delete your task')

with st.sidebar:
    page = option_menu("ToDo List",['Home','Insert','Edit', 'Delete'],
                         icons=['house','box-arrow-in-up','brush', 'backspace-reverse'])

if page == 'Insert':
    st.header('Insert Task')
    task = st.text_input('Task')
    cate = st.selectbox('Category', ['Work', 'Study', 'Entertainment'])
    pri = st.slider('Priority', 1, 5)
    
    if st.button('Insert'):
        if len(task):
            collection.insert_one({'Task': task, 'Category': cate, 'Priority': pri})
            st.success('Successfully Inserted')
        else:
            st.warning(ErrorMSG.msg[ErrorMSG.ERROR_MSG_NONESTR], icon="⚠️")
        
elif page == 'Edit':
    st.header('Edit Task')
    task = st.text_input('Find the Task & Category & Priority you want to Edit')
    cate = st.selectbox('Category', ['Work', 'Study', 'Entertainment'])
    pri = st.slider('Priority', 1, 5)
    
    st.header('Input your Edit')
    taskEdit = st.text_input('Input the Task & Category & Priority you want to Edit')
    cateEdit = st.selectbox('Edit Category', ['Work', 'Study', 'Entertainment'])
    priEdit = st.slider('Edit Priority', 1, 5)
    
    if st.button('Edit'):
        if len(task) and len(taskEdit):
            result = collection.find_one({'Task': task, 'Category': cate, 'Priority': pri})
            if (result):
                collection.update_one({'Task': task, 'Category': cate, 'Priority': pri}, {'$set':{'Task': taskEdit, 'Category': cateEdit, 'Priority': priEdit}})
                st.success('Successfully Edited')
            else:
                st.warning(ErrorMSG.msg[ErrorMSG.ERROR_MSG_NOFOUND], icon="⚠️")
        else:
            st.warning(ErrorMSG.msg[ErrorMSG.ERROR_MSG_NONESTREDIT], icon="⚠️")
    
elif page == 'Delete':
    st.header('Delete Task')
    task = st.text_input('Input the Task & Category you want to Delete')
    cate = st.selectbox('Category', ['Work', 'Study', 'Entertainment'])
    pri = st.slider('Priority', 1, 5)
    
    if st.button('Delete'):
        if (len(task)):
            result = collection.find_one({'Task': task, 'Category': cate, 'Priority': pri})
            if (result):
                collection.delete_one({'Task': task, 'Category': cate, 'Priority': pri})
                st.success('Successfully Deleted')
            else:
                st.warning(ErrorMSG.msg[ErrorMSG.ERROR_MSG_NOFOUND], icon="⚠️")
        else:
            st.warning(ErrorMSG.msg[ErrorMSG.ERROR_MSG_NONESTR], icon="⚠️")

elif page == 'Home':
    st.header('Home Page')
    tasks = collection.find({}, {'_id':0, }).sort([('Priority', -1), ('Task', 1)])
    st.table(tasks)