journal/Journal.Core/Models/TodoItem.cs

namespace Journal.Core.Models;

public class TodoItem
{
    public Guid Id { get; }
    public Guid ListId { get; }
    public string Text { get; set; }
    public bool Done { get; set; }
    public int SortOrder { get; set; }

    public TodoItem(Guid listId, string text, int sortOrder = 0)
    {
        Validate(text);
        if (listId == Guid.Empty)
            throw new ArgumentException("ListId is required", nameof(listId));

        Id = Guid.NewGuid();
        ListId = listId;
        Text = text.Trim();
        Done = false;
        SortOrder = sortOrder;
    }

    public TodoItem(Guid id, Guid listId, string text, bool done, int sortOrder)
    {
        if (id == Guid.Empty)
            throw new ArgumentException("Id is required", nameof(id));
        if (listId == Guid.Empty)
            throw new ArgumentException("ListId is required", nameof(listId));
        Validate(text);

        Id = id;
        ListId = listId;
        Text = text.Trim();
        Done = done;
        SortOrder = sortOrder;
    }

    private static void Validate(string text)
    {
        if (string.IsNullOrWhiteSpace(text))
            throw new ArgumentException("Text is required", nameof(text));
    }
}