playing around with multiple steps

FooBar.php

<?php
class FooBar
{
    public function doThing()
    {
        while (true) {
            // just render the regular view for non-post reqs
            if (!Request::isPost()) {
                break;
            }

            // if the input doesn't include keyFields, abort
            if (!$keys = Input::get("keyFields")) {
                Flash::error("No data submitted");
                break;
            }

            if (!$this->doAnotherThing()) {
                Flash::error("Could not identify those values");
                break;
            }

            if (!$this->doOneMoreThing()) {
                Flash::error("Incorrect information. Please try again");
                break;
            }

            return $this->processActivation($model);
        }

        return $this->renderActivationPage();
    }
}