Architecture

This project is an example of architecture using new technologies and best practices.

The goal is to share knowledge and use it as reference for new projects.

Thanks for enjoying!

Technologies

Practices

Clean Code
SOLID Principles
DDD (Domain-Driven Design)
Separation of Concerns
DevOps

Run

Command Line

Prerequisites

Steps

Open directory source\Web\Frontend in command line and execute npm run restore.
Open directory source\Web in command line and execute dotnet run.
Open https://localhost:8090.

Visual Studio Code

Prerequisites

Steps

Open directory source\Web\Frontend in command line and execute npm run restore.
Open source directory in Visual Studio Code.
Press F5.

Visual Studio

Prerequisites

Steps

Open directory source\Web\Frontend in command line and execute npm run restore.
Open source\Architecture.sln in Visual Studio.
Set Architecture.Web as startup project.
Press F5.

Docker

Prerequisites

Docker

Steps

Execute docker-compose up --build -d in root directory.
Open http://localhost:8090.

Utils

Books

Clean Code: A Handbook of Agile Software Craftsmanship - Robert C. Martin (Uncle Bob)
Clean Architecture: A Craftsman's Guide to Software Structure and Design - Robert C. Martin (Uncle Bob)
Implementing Domain-Driven Design - Vaughn Vernon
Domain-Driven Design Distilled - Vaughn Vernon
Domain-Driven Design: Tackling Complexity in the Heart of Software - Eric Evans
Domain-Driven Design Reference: Definitions and Pattern Summaries - Eric Evans

Tools

Visual Studio Extensions

Visual Studio Code Extensions

Nuget Packages

Source: https://github.com/rafaelfgx/DotNetCore

Published: https://www.nuget.org/profiles/rafaelfgx

Layers

Web: API and Frontend (Angular).

Application: Flow control.

Domain: Business rules and domain logic.

Model: Data transfer objects.

Database: Database persistence.

Web

Angular

Service

@Injectable({ providedIn: "root" })
export class AppCustomerService {
    constructor(
        private readonly http: HttpClient,
        private readonly gridService: GridService) { }

    private readonly url = "customers";

    add(model: CustomerModel) {
        return this.http.post<number>(this.url, model);
    }

    delete(id: number) {
        return this.http.delete(`${this.url}/${id}`);
    }

    get(id: number) {
        return this.http.get<CustomerModel>(`${this.url}/${id}`);
    }

    grid(parameters: GridParametersModel) {
        return this.gridService.get<CustomerModel>(`${this.url}/grid`, parameters);
    }

    inactivate(id: number) {
        return this.http.patch(`${this.url}/${id}/inactivate`, {});
    }

    list() {
        return this.http.get<CustomerModel[]>(this.url);
    }

    update(model: CustomerModel) {
        return this.http.put(`${this.url}/${model.id}`, model);
    }
}

Guard

@Injectable({ providedIn: "root" })
export class AppGuard implements CanActivate {
    constructor(private readonly appAuthService: AppAuthService) { }

    canActivate() {
        if (this.appAuthService.authenticated()) { return true; }
        this.appAuthService.signin();
        return false;
    }
}

ErrorHandler

@Injectable({ providedIn: "root" })
export class AppErrorHandler implements ErrorHandler {
    constructor(private readonly injector: Injector) { }

    handleError(error: any) {
        if (error instanceof HttpErrorResponse) {
            switch (error.status) {
                case 422: {
                    const appModalService = this.injector.get<AppModalService>(AppModalService);
                    appModalService.alert(error.error);
                    return;
                }
            }
        }

        console.error(error);
    }
}

HttpInterceptor

@Injectable({ providedIn: "root" })
export class AppHttpInterceptor implements HttpInterceptor {
    constructor(private readonly appAuthService: AppAuthService) { }

    intercept(request: HttpRequest<any>, next: HttpHandler) {
        request = request.clone({
            setHeaders: { Authorization: `Bearer ${this.appAuthService.token()}` }
        });

        return next.handle(request);
    }
}

ASP.NET Core

Startup

public sealed class Startup
{
    public void Configure(IApplicationBuilder application)
    {
        application.UseException();
        application.UseHttps();
        application.UseRouting();
        application.UseResponseCompression();
        application.UseAuthentication();
        application.UseAuthorization();
        application.UseEndpoints();
        application.UseSpa();
    }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddSecurity();
        services.AddResponseCompression();
        services.AddControllersMvcJsonOptions();
        services.AddSpa();
        services.AddContext();
        services.AddServices();
    }
}

Controller

[ApiController]
[Route("customers")]
public sealed class CustomerController : ControllerBase
{
    private readonly ICustomerService _customerService;

    public CustomerController(ICustomerService customerService)
    {
        _customerService = customerService;
    }

    [HttpPost]
    public Task<IActionResult> AddAsync(CustomerModel model)
    {
        return _customerService.AddAsync(model).ResultAsync();
    }

    [HttpDelete("{id}")]
    public Task<IActionResult> DeleteAsync(long id)
    {
        return _customerService.DeleteAsync(id).ResultAsync();
    }

    [HttpGet("{id}")]
    public Task<IActionResult> GetAsync(long id)
    {
        return _customerService.GetAsync(id).ResultAsync();
    }

    [HttpGet("grid")]
    public Task<IActionResult> GridAsync([FromQuery] GridParameters parameters)
    {
        return _customerService.GridAsync(parameters).ResultAsync();
    }

    [HttpPatch("{id}/inactivate")]
    public Task InactivateAsync(long id)
    {
        return _customerService.InactivateAsync(id);
    }

    [HttpGet]
    public Task<IActionResult> ListAsync()
    {
        return _customerService.ListAsync().ResultAsync();
    }

    [HttpPut("{id}")]
    public Task<IActionResult> UpdateAsync(CustomerModel model)
    {
        return _customerService.UpdateAsync(model).ResultAsync();
    }
}

Application

Service

public sealed class CustomerService : ICustomerService
{
    private readonly ICustomerFactory _customerFactory;
    private readonly ICustomerRepository _customerRepository;
    private readonly IUnitOfWork _unitOfWork;

    public CustomerService
    (
        ICustomerFactory customerFactory,
        ICustomerRepository customerRepository,
        IUnitOfWork unitOfWork
    )
    {
        _customerFactory = customerFactory;
        _customerRepository = customerRepository;
        _unitOfWork = unitOfWork;
    }

    public async Task<IResult<long>> AddAsync(CustomerModel model)
    {
        var validation = await new AddCustomerModelValidator().ValidationAsync(model);

        if (validation.Failed)
        {
            return Result<long>.Fail(validation.Message);
        }

        var customer = _customerFactory.Create(model);

        await _customerRepository.AddAsync(customer);

        await _unitOfWork.SaveChangesAsync();

        return Result<long>.Success(customer.Id);
    }

    public async Task<IResult> DeleteAsync(long id)
    {
        await _customerRepository.DeleteAsync(id);

        await _unitOfWork.SaveChangesAsync();

        return Result.Success();
    }

    public Task<CustomerModel> GetAsync(long id)
    {
        return _customerRepository.GetModelAsync(id);
    }

    public Task<Grid<CustomerModel>> GridAsync(GridParameters parameters)
    {
        return _customerRepository.GridAsync(parameters);
    }

    public async Task InactivateAsync(long id)
    {
        var customer = new Customer(id);

        customer.Inactivate();

        await _customerRepository.InactivateAsync(customer);

        await _unitOfWork.SaveChangesAsync();
    }

    public Task<IEnumerable<CustomerModel>> ListAsync()
    {
        return _customerRepository.ListModelAsync();
    }

    public async Task<IResult> UpdateAsync(CustomerModel model)
    {
        var validation = await new UpdateCustomerModelValidator().ValidationAsync(model);

        if (validation.Failed)
        {
            return Result.Fail(validation.Message);
        }

        var customer = _customerFactory.Create(model);

        await _customerRepository.UpdateAsync(customer.Id, customer);

        await _unitOfWork.SaveChangesAsync();

        return Result.Success();
    }
}

Factory

public sealed class CustomerFactory : ICustomerFactory
{
    public Customer Create(CustomerModel model)
    {
        return new Customer
        (
            new Name(model.FirstName, model.LastName),
            new Email(model.Email)
        );
    }
}

Domain

Entity

public sealed class Customer : Entity<long>
{
    public Customer(long id) : base(id) { }

    public Customer
    (
        Name name,
        Email email
    )
    {
        Name = name;
        Email = email;
        Activate();
    }

    public Name Name { get; private set; }

    public Email Email { get; private set; }

    public Status Status { get; private set; }

    public void Activate()
    {
        Status = Status.Active;
    }

    public void Inactivate()
    {
        Status = Status.Inactive;
    }
}

ValueObject

public sealed record Name(string FirstName, string LastName);

Model

public sealed record CustomerModel
{
    public long Id { get; init; }

    public string FirstName { get; init; }

    public string LastName { get; init; }

    public string Email { get; init; }
}

ModelValidator

public abstract class CustomerModelValidator : AbstractValidator<CustomerModel>
{
    public CustomerModelValidator Id()
    {
        RuleFor(customer => customer.Id).NotEmpty();
        return this;
    }

    public CustomerModelValidator FirstName()
    {
        RuleFor(customer => customer.FirstName).NotEmpty();
        return this;
    }

    public CustomerModelValidator LastName()
    {
        RuleFor(customer => customer.LastName).NotEmpty();
        return this;
    }

    public CustomerModelValidator Email()
    {
        RuleFor(customer => customer.Email).EmailAddress();
        return this;
    }
}

public sealed class AddCustomerModelValidator : CustomerModelValidator
{
    public AddCustomerModelValidator() => FirstName().LastName().Email();
}

public sealed class UpdateCustomerModelValidator : CustomerModelValidator
{
    public UpdateCustomerModelValidator() => Id().FirstName().LastName().Email();
}

public sealed class DeleteCustomerModelValidator : CustomerModelValidator
{
    public DeleteCustomerModelValidator() => Id();
}

Database

Context

public sealed class Context : DbContext
{
    public Context(DbContextOptions options) : base(options) { }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        builder.ApplyConfigurationsFromAssembly(typeof(Context).Assembly).Seed();
    }
}

Configuration

public sealed class CustomerConfiguration : IEntityTypeConfiguration<Customer>
{
    public void Configure(EntityTypeBuilder<Customer> builder)
    {
        builder.ToTable(nameof(Customer), nameof(Customer));

        builder.HasKey(customer => customer.Id);

        builder.Property(customer => customer.Id).ValueGeneratedOnAdd().IsRequired();

        builder.Property(customer => customer.Status).IsRequired();

        builder.OwnsOne(customer => customer.Name, customerName =>
        {
            customerName.Property(name => name.FirstName).HasColumnName(nameof(Name.FirstName)).HasMaxLength(100).IsRequired();

            customerName.Property(name => name.LastName).HasColumnName(nameof(Name.LastName)).HasMaxLength(200).IsRequired();
        });

        builder.OwnsOne(customer => customer.Email, customerEmail =>
        {
            customerEmail.Property(email => email.Value).HasColumnName(nameof(User.Email)).HasMaxLength(300).IsRequired();

            customerEmail.HasIndex(email => email.Value).IsUnique();
        });
    }
}

Repository

public sealed class CustomerRepository : EFRepository<Customer>, ICustomerRepository
{
    public CustomerRepository(Context context) : base(context) { }

    public Task<CustomerModel> GetModelAsync(long id)
    {
        return Queryable.Where(CustomerExpression.Id(id)).Select(CustomerExpression.Model).SingleOrDefaultAsync();
    }

    public Task<Grid<CustomerModel>> GridAsync(GridParameters parameters)
    {
        return Queryable.Select(CustomerExpression.Model).GridAsync(parameters);
    }

    public Task InactivateAsync(Customer customer)
    {
        return UpdatePartialAsync(customer.Id, new { customer.Status });
    }

    public async Task<IEnumerable<CustomerModel>> ListModelAsync()
    {
        return await Queryable.Select(CustomerExpression.Model).ToListAsync();
    }
}

Expression

public static class CustomerExpression
{
    public static Expression<Func<Customer, CustomerModel>> Model => customer => new CustomerModel
    {
        Id = user.Id,
        FirstName = user.Name.FirstName,
        LastName = user.Name.LastName,
        Email = user.Email.Value
    };

    public static Expression<Func<Customer, bool>> Id(long id)
    {
        return customer => customer.Id == id;
    }
}

Architecture

Technologies

Practices

Run

Prerequisites

Steps

Prerequisites

Steps

Prerequisites

Steps

Prerequisites

Steps

Utils

Nuget Packages

Layers

Web

Angular

Service

Guard

ErrorHandler

HttpInterceptor

ASP.NET Core

Startup

Controller

Application

Service

Factory

Domain

Entity

ValueObject

Model

Model

ModelValidator

Database

Context

Configuration

Repository

Expression

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