using System;
using System.Collections.Generic;
using Forks.Utils;

namespace BO {
  [AttributeUsage(AttributeTargets.Class)]
  public sealed class BOClassAttribute : Attribute {
    public bool Exclude { get; set; }

    public static bool IsBo(Type t) {
      var attr = ReflectionUtil.GetAttribute<BOClassAttribute>(t);
      if (attr == null) {
        return false;
      }
      return !attr.Exclude;
    }

    public static IEnumerable<Type> GetBoClasses() {
      var asm = typeof(BOClassAttribute).Assembly;
      foreach (var t in asm.GetExportedTypes()) {
        if (t.IsAbstract) {
          continue;
        }
        if (t.IsClass && IsBo(t)) {
          yield return t;
        }
      }
    }
  }
}