﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#nullable disable

using System.Collections.Generic;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace Microsoft.VisualStudio.LanguageServices.Implementation.Utilities
{
    internal class AbstractNotifyPropertyChanged : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        protected void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
            => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

        /// <returns>True if the property was updated</returns>
        protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string propertyName = "")
        {
            if (!EqualityComparer<T>.Default.Equals(field, value))
            {
                field = value;
                NotifyPropertyChanged(propertyName);
                return true;
            }

            return false;
        }
    }
}
