MireaBackend/Endpoint/Configuration/Core/Startup/SwaggerConfiguration.cs

using Asp.Versioning.ApiExplorer;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using Microsoft.OpenApi;
using Mirea.Api.Endpoint.Common.Services;
using Mirea.Api.Endpoint.Configuration.SwaggerOptions;
using Swashbuckle.AspNetCore.SwaggerGen;
using System;
using System.IO;

namespace Mirea.Api.Endpoint.Configuration.Core.Startup;

public static class SwaggerConfiguration
{
    public static IServiceCollection AddCustomSwagger(this IServiceCollection services)
    {
        services.AddSwaggerGen(options =>
        {
            var basePath = AppDomain.CurrentDomain.BaseDirectory;

            options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
            {
                In = ParameterLocation.Header,
                Description = "Keep the JWT token in the field (Bearer token)",
                Name = "Authorization",
                Type = SecuritySchemeType.Http
            });

            options.AddSecurityRequirement(document =>
            {
                var reference = new OpenApiSecuritySchemeReference("Bearer");

                return new OpenApiSecurityRequirement
                {
                    { reference, [] }
                };
            });

            if (File.Exists(Path.Combine(basePath, "docs.xml")))
                options.IncludeXmlComments(Path.Combine(basePath, "docs.xml"));

            if (File.Exists(Path.Combine(basePath, "ApiDtoDocs.xml")))
                options.IncludeXmlComments(Path.Combine(basePath, "ApiDtoDocs.xml"));
        });

        return services.AddTransient<IConfigureOptions<SwaggerGenOptions>, ConfigureSwaggerOptions>();
    }

    public static IApplicationBuilder UseCustomSwagger(this IApplicationBuilder app, IServiceProvider services)
    {
        app.UseSwagger();
        return app.UseSwaggerUI(options =>
        {
            options.InjectStylesheet($"{UrlHelper.GetSubPath}css/swagger/SwaggerDark.css");
            var provider = services.GetService<IApiVersionDescriptionProvider>();

            foreach (var description in provider!.ApiVersionDescriptions)
            {
                var url = $"/swagger/{description.GroupName}/swagger.json";
                var name = description.GroupName.ToUpperInvariant();
                options.SwaggerEndpoint(url, name);
                options.RoutePrefix = UrlHelper.GetSubPathSwagger.Trim('/');
            }
        });
    }
}