Pub\Controller\Username.php

<?php

namespace apathy\UsernameStyles\Pub\Controller;

class Username extends \XF\Pub\Controller\AbstractController
{
	public function actionIndex()
	{

	    $repo = $this->repository('apathy\UsernameStyles:Styles');

	    $finder = $repo->findUsernameStyle();
	    $userStyle = $finder->fetch();

	    $viewParams = [
		'style' => $userStyle
	    ];

 	    if ($this->isPost())
            {
                $visitor = \XF::visitor();

                if ($visitor->canEditProfile())
                {
                    $this->usernameSettingsSave($visitor->user_id)->run();
                }

                return $this->redirect($this->buildLink('account/username-settings'));
            }
            else
            {
 	        return $this->view('apathy\UsernameStyles:Username',
				   'ap_username_settings',
				   $viewParams);
	    }
	}

	protected function usernameSettingsSave($userid)
	{
    		$form = $this->formAction();

    		$input = $this->filter([
        		'bold' => 'int',
        		'color' => 'str',
			'glow' => 'str',
			'sparkle' => 'int'
    		]);

    		$entity = $this->finder('apathy\UsernameStyles:Username')
        		->where('user_id', $userid)
        		->fetchOne();

    		if(!$entity)
    		{
        		$input['user_id'] = $userid;

        		$entity = $this->em()->create('apathy\UsernameStyles:Username');
    		}

    		$form->basicEntitySave($entity, $input);

    		return $form;
	}
}