// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Collections.Generic;
 
namespace Microsoft.Extensions.FileProviders;
 
internal class FileInfoComparer : IEqualityComparer<IFileInfo>
{
    public static FileInfoComparer Instance { get; set; } = new FileInfoComparer();
 
    public bool Equals(IFileInfo x, IFileInfo y)
    {
        if (x == null && y == null)
        {
            return true;
        }
 
        if ((x == null && y != null) || (x != null && y == null))
        {
            return false;
        }
 
        return x.Exists == y.Exists &&
            x.IsDirectory == y.IsDirectory &&
            x.Length == y.Length &&
            string.Equals(x.Name, y.Name, StringComparison.Ordinal) &&
            string.Equals(x.PhysicalPath, y.PhysicalPath, StringComparison.Ordinal);
    }
 
    public int GetHashCode(IFileInfo obj) => 0;
}