C#C
C#•7mo ago
Thiago R.

How to deal with entry recurrence in a Todo List application?

I'm developing a college project (for the Data Structures and Algorithms class) that consists of a todo list, an agenda and a pomodoro timer:

The data relationship is quite simple:
  • An agenda event may have one or more todos
  • A pomodoro timing session may be related to one todo
  • A todo may be related with one agenda event, and multiple pomodor timing sessions.
However, my team is dealing with an issue: how to deal with recurrence?

Initially the idea was to let the user decide if a given agenda event or todo item has a recurrence
(daily, weekly, monthly or none):

namespace Agendai.Data.Models;


public enum Repeats
{
    None,
    Daily,
    Weekly,
    Monthly,
    Annually
}


So, the idea was to implement some basic combination of some design pattern with one or two data structures, where:

  • Some sorte of orchestrator would map all todo items and agenda events with a Repeats != Repeats.None
  • For each mapped entry, depending on its recurrence and the current user view (users can view a daily, weekly or a monthly calendar in the agenda window), generate "shallow copies" of the item to fill the view (for instance, a daily todo item would fill all squares in a month-view calendar)
  • As the user navigates the calendar further the creation of such entries, keep updating that orchestrator so it keeps filling the calendar state with entries matching the previously set Repeats flag
  • Only store finished todo items or Events prior to the system's current date
But I really don't know if that's the big deal. Never went through this before and I had a poor DSA class.
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