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@gistlyn gistlyn/ContactServices.cs
Last active Feb 20, 2019

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Validation Contact Services
public class CreateContactValidator : AbstractValidator<CreateContact>
{
public CreateContactValidator()
{
RuleFor(r => r.Title).NotEqual(Title.Unspecified).WithMessage("Please choose a title");
RuleFor(r => r.Name).NotEmpty();
RuleFor(r => r.Color).Must(x => x.IsValidColor()).WithMessage("Must be a valid color");
RuleFor(r => r.FilmGenres).NotEmpty().WithMessage("Please select at least 1 genre");
RuleFor(r => r.Age).GreaterThan(13).WithMessage("Contacts must be older than 13");
RuleFor(x => x.Agree).Equal(true).WithMessage("You must agree before submitting");
}
}
[Authenticate] // Limit to Authenticated Users
[ErrorView(nameof(CreateContact.ErrorView))] // Display ErrorView for HTML requests resulting in an Exception
[DefaultView("/server/contacts")] // Render custom HTML View for HTML Requests
public class ContactServices : Service
{
private static int Counter = 0;
internal static readonly ConcurrentDictionary<int, Data.Contact> Contacts = new ConcurrentDictionary<int, Data.Contact>();
public object Any(GetContacts request)
{
var userId = this.GetUserId();
return new GetContactsResponse
{
Results = Contacts.Values
.Where(x => x.UserAuthId == userId)
.OrderByDescending(x => x.Id)
.Map(x => x.ConvertTo<Contact>())
};
}
public object Any(GetContact request) =>
Contacts.TryGetValue(request.Id, out var contact) && contact.UserAuthId == this.GetUserId()
? (object)new GetContactResponse { Result = contact.ConvertTo<Contact>() }
: HttpError.NotFound($"Contact was not found");
public object Any(CreateContact request)
{
var newContact = request.ConvertTo<Data.Contact>();
newContact.Id = Interlocked.Increment(ref Counter);
newContact.UserAuthId = this.GetUserId();
newContact.CreatedDate = newContact.ModifiedDate = DateTime.UtcNow;
var contacts = Contacts.Values.ToList();
var alreadyExists = contacts.Any(x => x.UserAuthId == newContact.UserAuthId && x.Name == request.Name);
if (alreadyExists)
throw new ArgumentException($"You already have a contact named '{request.Name}'", nameof(request.Name));
Contacts[newContact.Id] = newContact;
return new CreateContactResponse { Result = newContact.ConvertTo<Contact>() };
}
public object AnyHtml(CreateContact request) // Called for CreateContact API HTML Requests on any HTTP Method
{
Any(request);
return HttpResult.Redirect(request.Continue ?? Request.GetView());
}
public void Any(DeleteContact request)
{
if (Contacts.TryGetValue(request.Id, out var contact) && contact.UserAuthId == this.GetUserId())
Contacts.TryRemove(request.Id, out _);
}
public object PostHtml(DeleteContact request) // Only called by DeleteContact HTML POST requests
{
Any(request);
return HttpResult.Redirect(request.Continue ?? Request.GetView()); //added by [DefaultView]
}
}
public class UpdateContactValidator : AbstractValidator<UpdateContact>
{
public UpdateContactValidator()
{
RuleFor(r => r.Id).GreaterThan(0);
RuleFor(r => r.Title).NotEqual(Title.Unspecified).WithMessage("Please choose a title");
RuleFor(r => r.Name).NotEmpty();
RuleFor(r => r.Color).Must(x => x.IsValidColor()).WithMessage("Must be a valid color");
RuleFor(r => r.FilmGenres).NotEmpty().WithMessage("Please select at least 1 genre");
RuleFor(r => r.Age).GreaterThan(13).WithMessage("Contacts must be older than 13");
}
}
[ErrorView(nameof(UpdateContact.ErrorView))] // Display ErrorView for HTML requests resulting in an Exception
public class UpdateContactServices : Service
{
public object Any(UpdateContact request)
{
if (!ContactServices.Contacts.TryGetValue(request.Id, out var contact) || contact.UserAuthId != this.GetUserId())
throw HttpError.NotFound("Contact was not found");
contact.PopulateWith(request);
contact.ModifiedDate = DateTime.UtcNow;
return request.Continue != null
? (object) HttpResult.Redirect(request.Continue)
: new UpdateContactResponse();
}
}
public static class ContactServiceExtensions // DRY reusable logic used in Services and Validators
{
public static int GetUserId(this Service service) => int.Parse(service.GetSession().UserAuthId);
public static bool IsValidColor(this string color) => !string.IsNullOrEmpty(color) &&
(color.FirstCharEquals('#')
? int.TryParse(color.Substring(1), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out _)
: Color.FromName(color).IsKnownColor);
}
// Register Custom Auto Mapping for converting Contact Data Model to Contact DTO
public class ContactsHostConfig : IConfigureAppHost
{
public void Configure(IAppHost appHost) =>
AutoMapping.RegisterConverter((Data.Contact from) => from.ConvertTo<Contact>(skipConverters:true));
}
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