booking-microservices/src/BuildingBlocks/Jwt/JwtExtensions.cs

using BuildingBlocks.Web;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Extensions.DependencyInjection;

namespace BuildingBlocks.Jwt;

using Duende.IdentityServer.EntityFramework.Entities;
using Microsoft.IdentityModel.Tokens;

public static class JwtExtensions
{
    public static IServiceCollection AddJwt(this IServiceCollection services)
    {
        var jwtOptions = services.GetOptions<JwtBearerOptions>("Jwt");

        services.AddAuthentication(o =>
        {
            o.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
            o.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
        })
            .AddCookie(cfg => cfg.SlidingExpiration = true)
            .AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, options =>
            {
                options.Authority = jwtOptions.Authority;
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateAudience = false,
                    ClockSkew = TimeSpan.FromSeconds(2) // For prevent add default value (5min) to life time token!
                };
                options.RequireHttpsMetadata = jwtOptions.RequireHttpsMetadata;
                options.MetadataAddress = jwtOptions.MetadataAddress;
            });

        if (!string.IsNullOrEmpty(jwtOptions.Audience))
        {
            services.AddAuthorization(options =>
                options.AddPolicy(nameof(ApiScope), policy =>
                {
                    policy.RequireAuthenticatedUser();
                    policy.RequireClaim("scope", jwtOptions.Audience);
                })
            );
        }

        return services;
    }
}