file_functions.py

from pip._vendor import requests
import json
import re


to_do_list = []
completed_tasks = []


def open_task_lists():
    """
    Open txt files to load To-Do List Tasks and 
    Completed Tasks saved from previous session
    """
    open_tasks()
    open_completed_tasks()


def open_tasks():
    task_list = open('tasks.txt', 'r')
    tasks = task_list.readlines()
    for task in tasks:
        to_do_list.append(json.loads(task))
    update_due_messages()
    task_list.close()


def update_due_messages():
    for task in to_do_list:
        due_message = get_message(task['Due'])
        task['Msg'] = due_message


def open_completed_tasks():
    task_list = open('completed_tasks.txt', 'r')
    tasks = task_list.readlines()
    for task in tasks:
        completed_tasks.append(json.loads(task))
    task_list.close()


def save_task_lists():
    """
    Write to txt files to save To-Do List Tasks and 
    Completed Tasks for next session
    """
    save_tasks()
    save_completed_tasks()


def save_tasks():
    task_list = open('tasks.txt', 'w')
    for task in to_do_list:
        task_list.writelines([json.dumps(task), '\n'])
    task_list.close()


def save_completed_tasks():
    task_list = open('completed_tasks.txt', 'w')
    for task in completed_tasks:
        task_list.writelines([json.dumps(task), '\n'])
    task_list.close()


def get_message(date):
    """
    Call to partner's microservice that sends a date and receives a
    message string that tells user when each task is due
    """
    url = f"http://localhost:8081/due/{date}"
    response = requests.get(url)
    json_data = json.loads(response.text)
    message = json_data['message']
    if re.search('ago', message):
        message += " [OVERDUE!]"
    return message