using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Data.Entity.ModelConfiguration;

namespace EF_General.Models.Ex18
{
    public class UserProfile
    {
        public int UserProfileId { set; get; }
        public string UserName { set; get; }

        [ForeignKey("CartableId")]
        public virtual Cartable Cartable { set; get; } // one-to-zero-or-one
        public int? CartableId { set; get; }

        public virtual ICollection<Doc> Docs { set; get; } // one-to-many
    }

    public class Doc
    {
        public int DocId { set; get; }
        public string Title { set; get; }
        public string Body { set; get; }

        [ForeignKey("UserProfileId")]
        public virtual UserProfile UserProfile { set; get; }
        public int UserProfileId { set; get; }

        public virtual ICollection<Cartable> Cartables { set; get; } // many-to-many
    }

    public class Cartable
    {
        public int CartableId { set; get; }

        [ForeignKey("UserProfileId")]
        public virtual UserProfile UserProfile { set; get; }
        public int UserProfileId { set; get; }

        public virtual ICollection<Doc> Docs { set; get; } // many-to-many
    }

    public class UserProfileMap : EntityTypeConfiguration<UserProfile>
    {
        public UserProfileMap()
        {
            this.HasOptional(x => x.Cartable)
                .WithRequired(x => x.UserProfile)
                .WillCascadeOnDelete();
        }
    }

    public class MyContext : DbContext
    {
        public DbSet<UserProfile> UserProfiles { get; set; }
        public DbSet<Doc> Docs { get; set; }
        public DbSet<Cartable> Cartables { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Configurations.Add(new UserProfileMap());
            base.OnModelCreating(modelBuilder);
        }
    }

    public class Configuration : DbMigrationsConfiguration<MyContext>
    {
        public Configuration()
        {
            AutomaticMigrationsEnabled = true;
            AutomaticMigrationDataLossAllowed = true;
        }
    }

    public static class Test
    {
        public static void RunTests()
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, Configuration>());
            using (var context = new MyContext())
            {
                var user = context.UserProfiles.Find(1);
                if (user != null)
                    Console.WriteLine(user.UserName);
            }
        }
    }
}

Introducing FOREIGN KEY constraint 'FK_DocCartables_Cartables_Cartable_CartableId' 
on table 'DocCartables' may cause cycles or multiple cascade paths. Specify 
ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.
Could not create constraint. See previous errors.

public int? UserProfileId { set; get; }

The referential relationship will result in a cyclical reference that is not allowed. [ Constraint name =  ]

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namespace CoreIocServices
{
    public interface IMyDisposableService
    {
        void Run();
    }

    public class MyDisposableService : IMyDisposableService, IDisposable
    {
        private readonly ILogger<MyDisposableService> _logger;

        public MyDisposableService(ILogger<MyDisposableService> logger)
        {
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
            _logger.LogInformation("+ {0} was created", this.GetType().Name);
        }

        public void Run()
        {
            _logger.LogInformation("Running MyDisposableService!");
        }

        public void Dispose()
        {
            _logger.LogInformation("- {0} was disposed!", this.GetType().Name);
        }
    }
}

namespace CoreIocSample02
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddTransient<IMyDisposableService, MyDisposableService>();

namespace CoreIocSample02.Controllers
{
    public class HomeController : Controller
    {
        private readonly IMyDisposableService _myDisposableService;

        public HomeController(IMyDisposableService myDisposableService)
        {
            _myDisposableService = myDisposableService;
        }

        public IActionResult Index()
        {
            _myDisposableService.Run();
            return View();
        }

info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[1]
      Route matched with {action = "Index", controller = "Home"}. Executing action CoreIocSample02.Controllers.HomeController.Index (CoreIocSample02)
info: CoreIocServices.MyDisposableService[0]
      + MyDisposableService was created
.
.
.  
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'CoreIocSample02.Controllers.HomeController.Index (CoreIocSample02)'
info: CoreIocServices.MyDisposableService[0]
      - MyDisposableService was disposed!
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 1316.4719ms 200 text/html; charset=utf-8

namespace CoreIocSample02
{
    public class Startup
    {
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            app.Use(async (context, next) =>
            {
                var writer = File.CreateText(Path.GetTempFileName());
                context.Response.RegisterForDispose(writer);
                context.Items["filewriter"] = writer;
                await writer.WriteLineAsync("some important information");
                await writer.FlushAsync();
                await next();
            });

namespace CoreIocSample02.Controllers
{
    public class HomeController : Controller
    {
        public async Task<IActionResult> WriteLog()
        {
            var writer = HttpContext.Items["filewriter"] as StreamWriter;
            if (writer != null)
            {
                await writer.WriteLineAsync("more important information");
                await writer.FlushAsync();
            }
            return View();
        }

using(var scope = serviceProvider.CreateScope())
{
   var provider = scope.ServiceProvider;
   var resolvedService = provider.GetRequiredService(someType);
   // Use resolvedService...
}

public void Configure(IApplicationBuilder app, 
                      ILoggerFactory loggerFactory, 
                      IServiceScopeFactory scopeFactory) 
{
   using (var scope = scopeFactory.CreateScope()) 
   { 
     var initializer = scope.ServiceProvider.GetService<IOperationScoped>(); 
     initializer.SeedAsync().Wait(); 
   } 
}

var myDisposableService = serviceProvider.GetService<IMyDisposableService>();
myDisposableService.Run();

var serviceCollection = new ServiceCollection();
ConfigureServices(serviceCollection);
var serviceProvider = serviceCollection.BuildServiceProvider();

namespace Microsoft.Extensions.DependencyInjection
{
    public sealed class ServiceProvider : IServiceProvider, IDisposable, IServiceProviderEngineCallback
    {
        public void Dispose();
        public object GetService(Type serviceType);
    }
}

namespace CoreIocSample01
{
    class Program
    {
        static void Main(string[] args)
        {
            var serviceCollection = new ServiceCollection();
            ConfigureServices(serviceCollection);
            using (var serviceProvider = serviceCollection.BuildServiceProvider())
            {
                var myDisposableService = serviceProvider.GetService<IMyDisposableService>();
                myDisposableService.Run();

                var testService = serviceProvider.GetService<ITestService>();
                testService.Run();
            }
        }

{
    "type": "https://example.com/probs/out-of-credit",
    "title": "You do not have enough credit.",
    "detail": "Your current balance is 30, but that costs 50.",
    "instance": "/account/12345/msgs/abc",
    "status": 403,
}

var mediaType = response.Content.Headers.ContentType?.MediaType;
if (mediaType != null && mediaType.Equals("application/problem+json", StringComparison.InvariantCultureIgnoreCase))
{
   var problemDetails = await response.Content.ReadFromJsonAsync<ProblemDetails>(null, ct) ?? new ProblemDetails();
   // ...
}

[HttpPost("/sales/products/{sku}/availableForSale")]
public async Task<IActionResult> AvailableForSale([FromRoute] string sku)
{
   return Problem(
            "Product is already Available For Sale.",
            "/sales/products/1/availableForSale",
            400,
            "Cannot set product as available.",
            "http://example.com/problems/already-available");
}

HTTP/1.1 400 Bad Request
Content-Type: application/problem+json
Content-Language: en
{
    "type": "https://tools.ietf.org/html/rfc7231#section-6.5.1",
    "title": "One or more validation errors occurred.",
    "status": 400,
    "errors": {
        "User": [
            "The user name is not verified."
        ]
    }
}

namespace WebApplication.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class DemoController : ControllerBase
    {
        [HttpPost]
        public ActionResult Post()
        {
            var problemDetails = new ProblemDetails
            {
                Detail = "The request parameters failed to validate.",
                Instance = null,
                Status = 400,
                Title = "Validation Error",
                Type = "https://example.net/validation-error",
            };

            problemDetails.Extensions.Add("invalidParams", new List<ValidationProblemDetailsParam>()
            {
                new("name", "Cannot be blank."),
                new("age", "Must be great or equals to 18.")
            });

            return new ObjectResult(problemDetails)
            {
                StatusCode = 400
            };
        }
    }

    public class ValidationProblemDetailsParam
    {
        public ValidationProblemDetailsParam(string name, string reason)
        {
            Name = name;
            Reason = reason;
        }

        public string Name { get; set; }
        public string Reason { get; set; }
    }
}

services.AddProblemDetails();

app.UseExceptionHandler();

app.UseStatusCodePages();

app.UseDeveloperExceptionPage();

builder.Services.AddProblemDetails(options =>
    options.CustomizeProblemDetails = ctx =>
            ctx.ProblemDetails.Extensions.Add("MachineName", Environment.MachineName));

public class MyErrorFeature
{
    public ErrorType Error  { get; set; }
}
​
public enum ErrorType
{
    ArgumentException
}

    [HttpGet("{value}")]
    public IActionResult MyErrorTest(int value)
    {
        if (value <= 0)
        {
            var errorType = new MyErrorFeature
            {
                Error = ErrorType.ArgumentException
            };
            HttpContext.Features.Set(errorType);
            return BadRequest();
        }
​
        return Ok(value);
    }

services.AddProblemDetails(options =>
    options.CustomizeProblemDetails = ctx =>
    {
        var MyErrorFeature = ctx.HttpContext.Features.Get<MyErrorFeature>();
​
        if (MyErrorFeature is not null)
        {
            (string Title, string Detail, string Type) details = MyErrorFeature.Error switch
            {
                ErrorType.ArgumentException =>
                (
                    nameof(ArgumentException),
                    "This is an argument-exception.",
                    "https://www.rfc-editor.org/rfc/rfc7231#section-6.5.1"
                ),
                _ =>
                (
                    nameof(Exception),
                    "default-exception",
                    "https://www.rfc-editor.org/rfc/rfc7231#section-6.6.1"
                )
            };
​
            ctx.ProblemDetails.Title = details.Title;
            ctx.ProblemDetails.Detail = details.Detail;
            ctx.ProblemDetails.Type = details.Type;
        }
    }
);

public class MyCustomException : Exception
{
    public MyCustomException(
        string message,
        HttpStatusCode statusCode = HttpStatusCode.BadRequest
    ) : base(message)
    {
        StatusCode = statusCode;
    }
​
    public HttpStatusCode StatusCode { get; }
}

    [HttpGet("{value}")]
    public IActionResult MyErrorTest(int value)
    {
        if (value <= 0)
        {
            throw new MyCustomException("The value should be positive!");
        }
​
        return Ok(value);
    }

app.UseExceptionHandler(exceptionHandlerApp =>
{
    exceptionHandlerApp.Run(async context =>
    {
        context.Response.ContentType = "application/problem+json";
​
        if (context.RequestServices.GetService<IProblemDetailsService>() is { } problemDetailsService)
        {
            var exceptionHandlerFeature = context.Features.Get<IExceptionHandlerFeature>();
            var exceptionType = exceptionHandlerFeature?.Error;
​
            if (exceptionType is not null)
            {
                (string Title, string Detail, string Type, int StatusCode) details = exceptionType switch
                {
                    MyCustomException MyCustomException =>
                    (
                        exceptionType.GetType().Name,
                        exceptionType.Message,
                        "https://www.rfc-editor.org/rfc/rfc7231#section-6.5.1",
                        context.Response.StatusCode = (int)MyCustomException.StatusCode
                    ),
                    _ =>
                    (
                        exceptionType.GetType().Name,
                        exceptionType.Message,
                        "https://www.rfc-editor.org/rfc/rfc7231#section-6.6.1",
                        context.Response.StatusCode = StatusCodes.Status500InternalServerError
                    )
                };
​
                await problemDetailsService.WriteAsync(new ProblemDetailsContext
                {
                    HttpContext = context,
                    ProblemDetails =
                    {
                        Title = details.Title,
                        Detail = details.Detail,
                        Type = details.Type,
                        Status = details.StatusCode
                    }
                });
            }
        }
    });
});
​

@page "/registration"

@inject IClientAuthenticationService AuthenticationService
@inject NavigationManager NavigationManager


<EditForm Model="UserForRegistration" OnValidSubmit="RegisterUser" class="pt-4">
    <DataAnnotationsValidator />
    <div class="py-4">
        <div class=" row form-group ">
            <div class="col-6 offset-3 ">
                <div class="card border">
                    <div class="card-body px-lg-5 pt-4">
                        <h3 class="col-12 text-success text-center py-2">
                            <strong>Sign Up</strong>
                        </h3>
                        @if (ShowRegistrationErrors)
                        {
                            <div>
                                @foreach (var error in Errors)
                                {
                                    <p class="text-danger text-center">@error</p>
                                }
                            </div>
                        }
                        <hr style="background-color:aliceblue" />
                        <div class="py-2">
                            <InputText @bind-Value="UserForRegistration.Name" class="form-control" placeholder="Name..." />
                            <ValidationMessage For="(()=>UserForRegistration.Name)" />
                        </div>
                        <div class="py-2">
                            <InputText @bind-Value="UserForRegistration.Email" class="form-control" placeholder="Email..." />
                            <ValidationMessage For="(()=>UserForRegistration.Email)" />
                        </div>
                        <div class="py-2 input-group">
                            <div class="input-group-prepend">
                                <span class="input-group-text"> +1</span>
                            </div>
                            <InputText @bind-Value="UserForRegistration.PhoneNo" class="form-control" placeholder="Phone number..." />
                            <ValidationMessage For="(()=>UserForRegistration.PhoneNo)" />
                        </div>
                        <div class="form-row py-2">
                            <div class="col">
                                <InputText @bind-Value="UserForRegistration.Password" type="password" id="password" placeholder="Password..." class="form-control" />
                                <ValidationMessage For="(()=>UserForRegistration.Password)" />
                            </div>
                            <div class="col">
                                <InputText @bind-Value="UserForRegistration.ConfirmPassword" type="password" id="confirm" class="form-control" placeholder="Confirm Password..." />
                                <ValidationMessage For="(()=>UserForRegistration.ConfirmPassword)" />
                            </div>
                        </div>
                        <hr style="background-color:aliceblue" />
                        <div class="py-2">
                            @if (IsProcessing)
                            {
                                <button type="submit" class="btn btn-success btn-block disabled"><i class="fas fa-sign-in-alt"></i> Please Wait...</button>
                            }
                            else
                            {
                                <button type="submit" class="btn btn-success btn-block"><i class="fas fa-sign-in-alt"></i> Register</button>
                            }
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</EditForm>

@code{
    UserRequestDTO UserForRegistration = new UserRequestDTO();
    bool IsProcessing;
    bool ShowRegistrationErrors;
    IEnumerable<string> Errors;

    private async Task RegisterUser()
    {
        ShowRegistrationErrors = false;
        IsProcessing = true;
        var result = await AuthenticationService.RegisterUserAsync(UserForRegistration);
        if (result.IsRegistrationSuccessful)
        {
            IsProcessing = false;
            NavigationManager.NavigateTo("/login");
        }
        else
        {
            IsProcessing = false;
            Errors = result.Errors;
            ShowRegistrationErrors = true;
        }
    }
}

@page "/login"

@inject IClientAuthenticationService AuthenticationService
@inject NavigationManager NavigationManager

<div id="logreg-forms">
    <h1 class="h3 mb-3 pt-3 font-weight-normal text-primary" style="text-align:center;">Sign In</h1>
    <EditForm Model="UserForAuthentication" OnValidSubmit="LoginUser">
        <DataAnnotationsValidator />
        @if (ShowAuthenticationErrors)
        {
            <p class="text-center text-danger">@Errors</p>
        }
        <InputText @bind-Value="UserForAuthentication.UserName" id="email" placeholder="Email..." class="form-control mb-2" />
        <ValidationMessage For="(()=>UserForAuthentication.UserName)"></ValidationMessage>
        <InputText @bind-Value="UserForAuthentication.Password" type="password" placeholder="Password..." id="password" class="form-control mb-2" />
        <ValidationMessage For="(()=>UserForAuthentication.Password)"></ValidationMessage>
        @if (IsProcessing)
        {
            <button type="submit" class="btn btn-success btn-block disabled"><i class="fas fa-sign-in-alt"></i> Please Wait...</button>
        }
        else
        {
            <button type="submit" class="btn btn-success btn-block"><i class="fas fa-sign-in-alt"></i> Sign in</button>
        }
        <a href="/registration" class="btn btn-primary text-white mt-3"><i class="fas fa-user-plus"></i> Register as a new user</a>
    </EditForm>
</div>
@code
{
    AuthenticationDTO UserForAuthentication = new AuthenticationDTO();
    bool IsProcessing = false;
    bool ShowAuthenticationErrors;
    string Errors;
    string ReturnUrl;

    private async Task LoginUser()
    {
        ShowAuthenticationErrors = false;
        IsProcessing = true;
        var result = await AuthenticationService.LoginAsync(UserForAuthentication);
        if (result.IsAuthSuccessful)
        {
            IsProcessing = false;
            var absoluteUri = new Uri(NavigationManager.Uri);
            var queryParam = HttpUtility.ParseQueryString(absoluteUri.Query);
            ReturnUrl = queryParam["returnUrl"];
            if (string.IsNullOrEmpty(ReturnUrl))
            {
                NavigationManager.NavigateTo("/");
            }
            else
            {
                NavigationManager.NavigateTo("/" + ReturnUrl);
            }
        }
        else
        {
            IsProcessing = false;
            Errors = result.ErrorMessage;
            ShowAuthenticationErrors = true;
        }
    }
}

<AuthorizeView>
    <Authorized>
        <li class="nav-item p-0">
          <NavLink class="nav-link" href="#">
             <span class="p-2">
                Hello, @context.User.Identity.Name!
             </span>
          </NavLink>
        </li>
        <li class="nav-item p-0">
          <NavLink class="nav-link" href="logout">
             <span class="p-2">
                Logout
             </span>
          </NavLink>
        </li>
    </Authorized>
    <NotAuthorized>
        <li class="nav-item p-0">
          <NavLink class="nav-link" href="registration">
            <span class="p-2">
               Register
            </span>
          </NavLink>
        </li>
        <li class="nav-item p-0">
          <NavLink class="nav-link" href="login">
            <span class="p-2">
              Login
            </span>
          </NavLink>
        </li>
    </NotAuthorized>
</AuthorizeView>

@page "/logout"

@inject IClientAuthenticationService AuthenticationService
@inject NavigationManager NavigationManager

@code
{
    protected async override Task OnInitializedAsync()
    {
        await AuthenticationService.LogoutAsync();
        NavigationManager.NavigateTo("/");
    }
}

namespace BlazorWasm.Client.Services
{
    public class AuthStateProvider : AuthenticationStateProvider
    {
        // ...

        public void NotifyUserLoggedIn(string token)
        {
            var authenticatedUser = new ClaimsPrincipal(
                                        new ClaimsIdentity(JwtParser.ParseClaimsFromJwt(token), "jwtAuthType")
                                    );
            var authState = Task.FromResult(new AuthenticationState(authenticatedUser));
            base.NotifyAuthenticationStateChanged(authState);
        }

        public void NotifyUserLogout()
        {
            var authState = Task.FromResult(new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity())));
            base.NotifyAuthenticationStateChanged(authState);
        }
    }
}

namespace BlazorWasm.Client.Services
{
    public class ClientAuthenticationService : IClientAuthenticationService
    {
        private readonly HttpClient _client;
        private readonly ILocalStorageService _localStorage;
        private readonly AuthenticationStateProvider _authStateProvider;

        public ClientAuthenticationService(
            HttpClient client,
            ILocalStorageService localStorage,
            AuthenticationStateProvider authStateProvider)
        {
            _client = client;
            _localStorage = localStorage;
            _authStateProvider = authStateProvider;
        }

        public async Task<AuthenticationResponseDTO> LoginAsync(AuthenticationDTO userFromAuthentication)
        {
            // ...
            if (response.IsSuccessStatusCode)
            {
                //...
                ((AuthStateProvider)_authStateProvider).NotifyUserLoggedIn(result.Token);

                return new AuthenticationResponseDTO { IsAuthSuccessful = true };
            }
            //...
        }

        public async Task LogoutAsync()
        {
            //...
            ((AuthStateProvider)_authStateProvider).NotifyUserLogout();
        }
    }
}

@attribute [Authorize(Roles = ‍ConstantRoles.Customer)]

@using Microsoft.AspNetCore.Authorization

@page "/hotel-room-details/{Id:int}"

// ...

@code {
     // ...

    protected override async Task OnInitializedAsync()
    {
        try
        {
            HotelBooking.OrderDetails = new RoomOrderDetailsDTO();
            if (Id != null)
            {
                // ...

                if (await LocalStorage.GetItemAsync<UserDTO>(ConstantKeys.LocalUserDetails) != null)
                {
                    var userInfo = await LocalStorage.GetItemAsync<UserDTO>(ConstantKeys.LocalUserDetails);
                    HotelBooking.OrderDetails.UserId = userInfo.Id;
                    HotelBooking.OrderDetails.Name = userInfo.Name;
                    HotelBooking.OrderDetails.Email = userInfo.Email;
                    HotelBooking.OrderDetails.Phone = userInfo.PhoneNo;
                }
            }
        }
        catch (Exception e)
        {
            await JsRuntime.ToastrError(e.Message);
        }
    }

public async Task<RoomOrderDetailsDTO> SaveRoomOrderDetailsAsync(RoomOrderDetailsDTO details)
{
   // details.UserId = "unknown user!";

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*"
           modules="AspNetCoreModule" resourceType="Unspecified"/>
    </handlers>
    <aspNetCore processPath="%LAUNCHER_PATH%"
                arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false"
                stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false"/>
  </system.webServer>
</configuration>

 dotnet publish --framework netcoreapp1.0 --output "c:\temp\mysite" --configuration Release

{

    "publishOptions": {
        "include": [
            "wwwroot",
            "Features",
            "appsettings.json",
            "web.config"
        ]
    },
 
    "scripts": {
        "precompile": [
            "dotnet bundle"
        ],
        "prepublish": [
            //"bower install"
        ],
        "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
    }
}

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />
    </handlers>
    <aspNetCore processPath="dotnet" arguments=".\Core1RtmEmptyTest.dll" stdoutLogEnabled="true" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false" />
  </system.webServer>
</configuration>

 Warning: Could not create stdoutLogFile \\?\D:\Prog\1395\Core1RtmEmptyTest\src\Core1RtmEmptyTest\bin\Release\PublishOutput\logs\stdout_10064_201672893654.log, ErrorCode = -2147024893.