// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.AspNetCore.Authentication;
 
/// <summary>
/// A contract for securing data.
/// </summary>
/// <typeparam name="TData">The type of the data to protect.</typeparam>
public interface ISecureDataFormat<TData>
{
    /// <summary>
    /// Protects the specified <paramref name="data"/>.
    /// </summary>
    /// <param name="data">The value to protect</param>
    /// <returns>The data protected value.</returns>
    string Protect(TData data);
 
    /// <summary>
    /// Protects the specified <paramref name="data"/> for the specified <paramref name="purpose"/>.
    /// </summary>
    /// <param name="data">The value to protect</param>
    /// <param name="purpose">The purpose.</param>
    /// <returns>A data protected value.</returns>
    string Protect(TData data, string? purpose);
 
    /// <summary>
    /// Unprotects the specified <paramref name="protectedText"/>.
    /// </summary>
    /// <param name="protectedText">The data protected value.</param>
    /// <returns>An instance of <typeparamref name="TData"/>.</returns>
    TData? Unprotect(string? protectedText);
 
    /// <summary>
    /// Unprotects the specified <paramref name="protectedText"/> using the specified <paramref name="purpose"/>.
    /// </summary>
    /// <param name="protectedText">The data protected value.</param>
    /// <param name="purpose">The purpose.</param>
    /// <returns>An instance of <typeparamref name="TData"/>.</returns>
    TData? Unprotect(string? protectedText, string? purpose);
}