Program.cs

using FirebaseAdmin;
using Google.Apis.Auth.OAuth2;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using Microsoft.OpenApi.Models;
using MQTTnet;
using System.Text;
using GPS_Server.Services;
using GPS_Server.Data;
using GPS_Server.Models;
using MQTTnet.Client;
using MQTTnet.Protocol;
using MQTTnet.Server;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllers().AddNewtonsoftJson(options =>
    options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
);



builder.Services.AddSingleton(serviceProvider =>
{
    var mqttFactory = new MqttFactory();
    var mqttClient = mqttFactory.CreateMqttClient();
    return mqttClient;
});

builder.Services.AddHostedService<MQTTservice>();


builder.Services.AddIdentity<IdentityUser, IdentityRole>()
        .AddDefaultTokenProviders()
        .AddEntityFrameworkStores<ApplicationDbContext>();

builder.Services.AddDbContext<ApplicationDbContext>(options =>
        options.UseNpgsql(
            builder.Configuration.GetConnectionString("TcuServerConnection")));

builder.Services.AddDbContext<TCUContext>(options =>
        options.UseNpgsql(
            builder.Configuration.GetConnectionString("TcuServerConnection")));


builder.Services.AddControllers().AddNewtonsoftJson(options =>
    options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
);

// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddControllers();
builder.Services.AddSignalR();
builder.Services.AddAuthorization(options =>
{
    options.AddPolicy("MobileOnly", policy =>
    {
        policy.RequireClaim("deviceId");
    });
});

builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
})
                .AddJwtBearer(options =>
                {
                    options.SaveToken = true;
                    options.RequireHttpsMetadata = false;
                    options.TokenValidationParameters = new TokenValidationParameters()
                    {
                        ValidateIssuer = true,
                        ValidateAudience = true,
                        ValidAudience = builder.Configuration["JWT:ValidAudience"],
                        ValidIssuer = builder.Configuration["JWT:ValidIssuer"],
                        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(builder.Configuration["JWT:Secret"]))
                    };
                    options.Events = new JwtBearerEvents
                    {
                        OnMessageReceived = context =>
                        {
                            var accessToken = context.Request.Query["access_token"];
                            // If the request is for our hub...
                            var path = context.HttpContext.Request.Path;
                            if (!string.IsNullOrEmpty(accessToken) &&
                                (path.StartsWithSegments("/GPS")))
                            {
                                // Read the token out of the query string
                                context.Token = accessToken;
                            }
                            return Task.CompletedTask;
                        }
                    };
                });

if (builder.Environment.IsDevelopment())
{
    builder.Services.AddSwaggerGen(c =>
    {
        c.SwaggerDoc("v1", new OpenApiInfo
        {
            Title = "JWTToken_Auth_API",
            Version = "v1"
        });
        c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme()
        {
            Name = "Authorization",
            Type = SecuritySchemeType.ApiKey,
            Scheme = "Bearer",
            BearerFormat = "JWT",
            In = ParameterLocation.Header,
            Description = "JWT Authorization header using the Bearer scheme. \r\n\r\n Enter 'Bearer' [space] and then your token in the text input below.\r\n\r\nExample: \"Bearer 1safsfsdfdfd\"",
        });
        c.AddSecurityRequirement(new OpenApiSecurityRequirement {
        {
            new OpenApiSecurityScheme {
                Reference = new OpenApiReference {
                    Type = ReferenceType.SecurityScheme,
                        Id = "Bearer"
                }
            },
            Array.Empty<string>()
        }
    });
    });
}



var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.MapControllers();
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
    endpoints.MapHub<LocationHub>("/GPS");
});
app.Run();