Taskwards.Web/Infrastructure/Auth/TaskwardsAuthStateProvider.cs - master - va1eriy/taskwards

Taskwards.Web/Infrastructure/Auth/TaskwardsAuthStateProvider.cs

59 строк2 KB

Valeriy Kokorev

feat: add auth infrastructure foundation (tasks 1.4-1.9)

23 фев 2026, 20:36

23 фев 2026, 20:36de8f5b5

using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using Microsoft.AspNetCore.Components.Authorization;

namespace Taskwards.Web.Infrastructure.Auth;

/// <summary>
/// Кастомный AuthenticationStateProvider для Blazor WASM на основе JWT токенов
/// </summary>
public class TaskwardsAuthStateProvider : AuthenticationStateProvider
{
    private readonly ITokenStorageService _tokenStorage;

    public TaskwardsAuthStateProvider(ITokenStorageService tokenStorage)
    {
        _tokenStorage = tokenStorage;
    }

    public override async Task<AuthenticationState> GetAuthenticationStateAsync()
    {
        var token = await _tokenStorage.GetAccessTokenAsync();

        if (string.IsNullOrEmpty(token))
            return new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity()));

        var claims = ParseClaimsFromJwt(token);
        if (claims == null)
            return new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity()));

        var identity = new ClaimsIdentity(claims, "jwt");
        return new AuthenticationState(new ClaimsPrincipal(identity));
    }

    /// <summary>
    /// Уведомить об изменении состояния аутентификации (вызывать после login/logout)
    /// </summary>
    public void NotifyAuthStateChanged()
    {
        NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
    }

    private static IEnumerable<Claim>? ParseClaimsFromJwt(string token)
    {
        try
        {
            var handler = new JwtSecurityTokenHandler();
            var jwtToken = handler.ReadJwtToken(token);

            if (jwtToken.ValidTo < DateTime.UtcNow)
                return null;

            return jwtToken.Claims;
        }
        catch
        {
            return null;
        }
    }
}