Basic task tracker to keep myself organised. Will build on it incrementally as and when I find time.

1. main.py contains infinite loop to process user commands.

2. core.py has the essential components (Parser, Task Manager, Tasks).

3. data.json stores the tasks in json format.

To execute, type the following in a terminal in the Task Tracker repository:

$ python3 main.py

There are 4 types of commands you can run:

1. add - Add a task. You will be prompted for a description and a due date. A task ID will be assigned automatically to your task.
2. update - Update a task. You will be prompted for a task ID. If it exists, you will be prompted for an updated description and due date.
3. delete - Delete a task. You will be prompted for a task ID. If it exists, the corresponding tasks will be deleted.
4. show - There are three commands here.
   1. show all - show all tasks
   2. show day - show all tasks with due dates today
   3. show week - show all tasks with due dates within a week from now

Besides these, you can always run help and exit as and when required.

Typing exit is necessary for saving the tasks back onto file so that they persist for the next time you run Task Tracker.

The main.py file runs an infinite loop accepting commands at a $ prompt. Accepted command is passed into a Parser class object.

The code in core.py is organized into three main classes:

• Parser - This is the class exposed to the user. processCommand function accepts user input command, say X and calls appropriate functions processX (X -> add, update, delete, exit and so forth).
• Task Manager - Class for managing the tasks created. Stores tasks as a list of Task class objects. On exit, dumps existing tasks as a json into data.json. On program execution, loads those records from data.json into the list of tasks it maintains.
• Task - Class that models a task. Attributes - task description, task due date, task date added, and a unique task ID.

1. Add 'modify' into VALID_COMMANDS list in Parser class
2. Add a handler function (ideally, processModify) in Parser class to be called to process the command
3. Add a condition in processCommand function in Parser class to call the handler function created in 2 upon detecting that user has entered 'modify'