Tagada 1.3.1

Tagada

For those who dream to make an ASP.NET Core Web API in one line of code

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A simple Hello World

public void ConfigureServices(IServiceCollection services)
{
    services.AddRouting();
}

public void Configure(IApplicationBuilder app)
{
    app.Map("/api")
        .Get("/hello", () => "Hello world!")
        .Use();
}

Add Swagger documentation

public void ConfigureServices(IServiceCollection services)
{
    services.AddRouting();

    services.AddSwaggerGen(c =>
    {
        c.GenerateTagadaSwaggerDoc();
    });
}

public void Configure(IApplicationBuilder app)
{
    app.Map("/api")
        .Get("/hello", () => "Hello world!")
        .AddSwagger()
        .Use();
}

CQRS-ready

public void ConfigureServices(IServiceCollection services)
{
    services.AddRouting();
}

public void Configure(IApplicationBuilder app)
{
    app.Map("/api")
        .Get("/contacts", GetContacts)
        .Get("/contacts/{id}", GetContactById)
        .Post("/contacts", CreateContact)
        .Use();
}

public class GetContactsQuery { }

public class GetContactByIdQuery
{
    public int Id { get; set; }
}

public class CreateContactCommand
{
    public string Name { get; set; }
}

Storing Commands in a single line of code

public void ConfigureServices(IServiceCollection services)
{
    services.AddRouting();
}

public void Configure(IApplicationBuilder app)
{
    app.Map("/api")
        .Get("/contacts", GetContacts)
        .Get("/contacts/{id}", GetContactById)
        .Post("/contacts", CreateContact)
        .AfterEach(routeResult => QueriesOrCommands.Add(routeResult.Input))
        .Use();
}

Writing queries

• Return result without parameters

.Get("/hello", () => "Hello world!")

• Return result from query (extracted from parameters)

.Get("/add/{number1}/{number2}", (AddNumbersQuery query) => query.Number1 + query.Number2)

• Return result from query with a function

.Get("/contacts", GetContacts)

public static Func<GetContactsQuery, IEnumerable<Contact>> GetContacts = _ => Contacts;

Writing commands

• Command without result

.Post<Command>("/command", Dispatch)

public static void Dispatch(Command command)
{
    Commands.Add(command);
}

• Command with a result

.Post("/contacts", CreateContact)

public static Func<CreateContactCommand, Contact> CreateContact = command =>
{
    var newContact = new Contact
    {
        Id = Contacts.Count + 1,
        FirstName = command.FirstName,
        LastName = command.LastName
    };

    Contacts.Add(newContact);

    return newContact;
};