// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Text.Json;
 
namespace Microsoft.AspNetCore.Authentication;
 
/// <summary>
/// Authentication extensions to <see cref="JsonDocument"/>.
/// </summary>
public static class JsonDocumentAuthExtensions
{
    /// <summary>
    /// Gets a string property value from the specified <see cref="JsonElement"/>.
    /// </summary>
    /// <param name="element">The <see cref="JsonElement"/>.</param>
    /// <param name="key">The property name.</param>
    /// <returns>The property value.</returns>
    public static string? GetString(this JsonElement element, string key)
    {
        if (element.TryGetProperty(key, out var property) && property.ValueKind != JsonValueKind.Null)
        {
            return property.ToString();
        }
 
        return null;
    }
}