Validation.scala

import org.bowlerframework.controller.Controller
import org.bowlerframework.model.{ ParameterMapper, Validations}
import org.bowlerframework.view.{Renderable}

/**
 * 
 * extends:
 * - Controller: used to construct routes and deal with them by providing functions that respond to routes.
 * - ParameterMapper: takes a request and maps any values into beans or other objects.
 * - Validations: validation enables the Controller
 * - Renderable: allows you to render View Model objects.
 */

class WidgetController extends Controller with FunctionNameConventionRoutes with Validations with Renderable {
  // HTTP POST for creating new Widgets.
  def `POST /widgets`(widget: Widget) = {
    // validate the Widget, pass the widget as a param, so the validation error functionality knows which object
    // failed validation, IF it fails.
    validate(widget){
      val validator = new WidgetValidator(widget)
      validator.add(new UniqueValidator({widget.id}))
      validator.validate // returns an Option[List[Tuple2[String,String]] where :
      // None = no validation errors
      // Some with a List: validation errors, 1st String in tuple: property key, 2nd String: error message.
    }
    Widgets.create(widget)
    render(widget)
  }


}