CompositeProxy

using System;
using System.Linq;

namespace DotNetDesignPatternDemos.Structural.Proxy.Composite
{
  // todo: publish
  public class MasonrySettings
  {
    //public bool? All
    //{
    //  get
    //  {
    //    if (Pillars == Walls &&
    //        Walls == Floors)
    //      return Pillars;
    //    return null;
    //  }
    //  set
    //  {
    //    if (!value.HasValue) return;
    //    Pillars = value.Value;
    //    Walls = value.Value;
    //    Floors = value.Value;
    //  } // error-prone!
    //}

    public bool? All
    {
      get
      {
        if (flags.Skip(1).All(f => f == flags[0]))
          return flags[0];
        return null;
      }

      set
      {
        if (!value.HasValue) return;
        for (int i = 0; i < flags.Length; ++i)
          flags[i] = value.Value;
      }
    }
    
    //public bool Pillars;
    //public bool Walls;
    //public bool Floors;

    private bool[] flags = new bool[3];

    public bool Pillars
    {
      get => flags[0];
      set => flags[0] = value;
    }

    public bool Walls
    {
      get => flags[1];
      set => flags[1] = value;
    }
    
    public bool Floors
    {
      get => flags[2];
      set => flags[2] = value;
    }

  }
}