Should I refactor this code?

The code is for viewing the talk page. The code should determine whether or not to show the response form to the viewer.

If the user is signed in and the user is not the thread creator, check if the user has replied to the thread.

If the user has not yet responded to the debate then show the form ... Otherwise, check if the user wants to edit an already existing response by looking at the response id url

If any of these tests fail, then I store the reason as an int and pass that to the switch statement in the view.

The logic seems simple enough, but my code looks a bit messy.

Here's the code .. (using Kohana V2.3.4)

public function view($id = 0)
{
    $debate = ORM::factory('debate')->with('user')->with('category')->find($id);

    if ($debate->loaded == FALSE)
    {
        url::redirect();
    }

    // series of tests to show an add reply form
    if ($this->logged_in)
    {
        // is the viewer the creator?
        if ($this->user->id != $debate->user->id)
        {
            // has the user already replied?
            if (ORM::factory('reply')
                ->where(array('debate_id' => $id, 'user_id' => $this->user->id))
                ->count_all() == 0)
            {
                $form = $errors = array
                (
                    'body'      => '',
                    'choice_id' => '',
                    'add'       => ''
                );

                if ($post = $this->input->post())
                {
                    $reply = ORM::factory('reply');

                    // validate and insert the reply
                    if ($reply->add($post, TRUE))
                    {
                        url::redirect(url::current());
                    }

                    $form   = arr::overwrite($form,   $post->as_array());
                    $errors = arr::overwrite($errors, $post->errors('reply_errors'));
                }
            }
            // editing a reply?
            else if (($rid = (int) $this->input->get('edit'))
                    AND ($reply = ORM::factory('reply')
                                ->where(array('debate_id' => $id, 'user_id' => $this->user->id))
                                ->find($rid)))
            {
                $form = $errors = array
                (
                    'body'      => '',
                    'choice_id' => '',
                    'add'       => ''
                );

                // autocomplete the form
                $form = arr::overwrite($form, $reply->as_array());

                if ($post = $this->input->post())
                {
                    // validate and insert the reply
                    if ($reply->edit($post, TRUE))
                    {
                        url::redirect(url::current());
                    }

                    $form   = arr::overwrite($form,   $post->as_array());
                    $errors = arr::overwrite($errors, $post->errors('reply_errors'));
                }
            }
            else
            {
                // user already replied
                $reason = 3;
            }
        }
        else
        {
            // user started the debate
            $reason = 2;
        }
    }
    else
    {
        // user is not logged in.
        $reason = 1;
    }

    $limits = Kohana::config('app/debate.limits');
    $page   = (int) $this->input->get('page', 1);
    $offset = ($page > 0) ? ($page - 1) * $limits['replies'] : 0;

    $replies = ORM::factory('reply')->with('user')->with('choice')->where('replies.debate_id', $id);

    $this->template->title  = $debate->topic;
    $this->template->debate = $debate;
    $this->template->body   = View::factory('debate/view')
        ->set('debate',     $debate)
        ->set('replies',    $replies->find_all($limits['replies'], $offset))
        ->set('pagination', Pagination::factory(array
            (
                'style'          => 'digg',
                'items_per_page' => $limits['replies'],
                'query_string'   => 'page',
                'auto_hide'      => TRUE,
                'total_items'    => $total = $replies->count_last_query()
            ))
        )
        ->set('total', $total);

    // are we showing the add reply form?
    if (isset($form, $errors))
    {
        $this->template->body->add_reply_form = View::factory('reply/add_reply_form')
            ->set('debate', $debate)
            ->set('form',   $form)
            ->set('errors', $errors);
    }
    else
    {
        $this->template->body->reason = $reason;
    }
}

      

        
        
        
      

    

This view, this is the logic that determines which message to show to the user.

<!-- Add Reply Form -->
<?php if (isset($add_reply_form)): ?>

    <?php echo $add_reply_form; ?>

<?php else: ?>

    <?php
        switch ($reason)
        {
            case 1 :
                // not logged in, show a message
                $message = 'Add your ' . html::anchor('login?url=' . url::current(TRUE), '<b>vote</b>') . ' to this discussion';
                break;

            case 2 :
                // started the debate. dont show a message for that.
                $message = NULL;
                break;

            case 3:
                // already replied, show a message
                $message = 'You have already replied to this debate';
                break;

            default:
                // unknown reason. dont show a message
                $message = NULL;
                break;
        }
    ?>

    <?php echo app::show_message($message, 'h2'); ?>

<?php endif; ?>
<!-- End Add Reply Form -->

      

        
        
        
      

    

Should I refactor the logic for adding the response to another function or whatever ... Everything works, it just seems sloppy.

thanks

Edit: I've taken all the answers into account. Since I hadn't added anything new at the moment and had time to kill, I decided to refactor the code. After a little thought, the best solution came out to me. The whole process took me about 30 minutes and I would say it was worth it. Thanks everyone for your answers