ToDoList/checklist/checklist.py

from flask import Flask, render_template, Blueprint, request, redirect, url_for
from datetime import timezone
import os

clbp = Blueprint('checklist', __name__)


def save_checklist(list_items):  # Save checklist items
    new_list = json.dumps(list_items, indent=4)
    list_file = os.path.join(current_app.instance_path, 'list.py')
    try:
        with open(list_file, 'w') as f:
            f.write(f'LIST = [{new_list}]')
        f.close
        current_app.config.from_pyfile('list.py', silent=True)  # Reread the list into the app
    except Exception as sclerror:
        current_app.logger.error(f'Couldn\'t save list.py: {sclerror.args[0]}')


@clbp.route('/', methods=['GET', 'POST'])
def index():
    checklist_items = current_app.list['LIST']
    if request.method == 'POST':
        item = request.form.get('item')
        if item:
            checklist_items.append({'name': item, 'checked': False})
            save_checklist(checklist_items)  # Save to file after adding
        return redirect(url_for('index'))
    return render_template('index.html', items=checklist_items)


@clbp.route('/check/<int:item_id>')
def check(item_id):
    checklist_items = current_app.list['LIST']
    if 0 <= item_id < len(checklist_items):
        checklist_items[item_id]['checked'] = not checklist_items[item_id]['checked']
        save_checklist(checklist_items)  # Save to file after checking
    return redirect(url_for('index'))


@clbp.route('/clear')
def clear():
    checklist_items = current_app.list['LIST']
    checklist_items = []  # Clear the list
    save_checklist(checklist_items)  # Save the empty list
    return redirect(url_for('index'))


@clbp.route('/list')
def list():
    checklist_items = current_app.list['LIST']
    return render_template('list.html', items=checklist_items)