Danom.Validation 1.0.0-alpha1

Danom.Validation

One of the places the Results type really shines is input validation. It's a natural step in most workflows to validate input data before processing it, and the Result type is a great way to handle this. The Danom.Validation library provides a set of utilities to help with this and integrates with the wonderful FluentValidation library.

Getting Started

Install the Danom.Validation NuGet package:

PM>  Install-Package Danom.Validation

Or using the dotnet CLI

dotnet add package Danom.Validation

Quick Start

using Danom;
using Danom.Validation;
using FluentValidation;

public record Attendee(
    string Name,
    int Age,
    Option<string> Email,
    Option<string> AlternateEmail);

public class AttendeeValidator
    : AbstractValidator<Attendee>
{
    public AttendeeValidator()
    {
        RuleFor(x => x.Name).NotEmpty();
        RuleFor(x => x.Age).GreaterThan(0);
        RuleFor(x => x.Email).Required(x => x.EmailAddress());
        RuleFor(x => x.AlternateEmail).Optional(x => x.EmailAddress());
    }
}

var input =
    new Attendee(
        Name: "John Doe",
        Age: 30,
        Email: Option<string>.Some("john@doe.com"),
        AlternateEmail: Option<string>.None());

var result =
    ValidationResult<Attendee>
        .From<AttendeeValidator>(input);

result.Match(
    x => Console.WriteLine("Input is valid: {0}", x),
    e => Console.WriteLine("Input is invalid: {0}", e));