Nette shoutbox.

<?php
namespace App\Model;

use App\Model\BaseManager;

class ShoutboxManager extends BaseManager
{
    const 
        TABLE_NAME = 'shoutbox',
        COLUMN_ID = 'shout_id';
       
public function getShouts()
{
     return $this->database->table(self::TABLE_NAME)->order(self::COLUMN_ID . ' DESC');
}

public function saveShout($shout)
{
    if(!$shout[self::COLUMN_ID])
        $this->database->table(self::TABLE_NAME)->insert($shout);
    else 
        $this->database->table(self::TABLE_NAME)->where(self::COLUMN_ID, $shout[self::COLUMN_ID])->update($shout);
}
}

<?php

use App\Model\ShoutboxManager;
use Nette\Application\BadRequestException;
use Nette\Application\UI\Form;
use Nette\Database\UniqueConstraintViolationException;
use Nette\Application\UI;

class ShoutboxControl extends Control
{
    protected $shoutboxManager;
    private $database;
    
    public function __construct(ShoutboxManager $shoutboxManager)
    {
        parent::__construct();
        $this->shoutboxManager = $shoutboxManager;
    }
    
    
    ...
    
    
    public function actionEditorshout($shout_id)
    {
        if($shout_id) ($shout = $this->shoutboxManager->getShouts($shout_id)) ? $this['editorFormsshoutbox']->setDefaults($shout) : $this->flashMessage ('Shout nenalezen.');
    }
    public function ereateComponentEditorFormshoutbox()
    {
        $form = new Form;
        $form->addHidden(shout_id);
        $form->addGroup('Shoutbox:');
        $form->addText('nick', 'Jméno')->setRequired();
        $form->addText('shout', 'Text')->setRequired();
        $form->setCurrentGroup(NULL);
        $form->addSubmit('submit', 'Vložit');
        $form->onSuccess[] = [$this, 'editorFormshoutboxSucceeded'];
        return $form;
    }
    public function editorFormshoutboxSucceeded($form, $values)
    {
        try {
            $this->shoutboxManager->saveShout($values);
            $this->flashMessage('Přízpěvek byl úspěšně uložen.');
            $this->redirect(':Core:Shout:', $values->url);
        } catch (UniqueConstraintViolationException $ex) {
            $this->flashMessage('Přispěvek s tímto URL již existuje.');
        } 
    }
}

public function renderShoutbox()
    {
        $this->template->shoutbox = $this->shoutboxManager->getShouts();
    }

    $template = $this->template;
    $template->setFile(__DIR__ . '/shoutbox.latte');
    $template->param = $this->shoutboxManager->getShouts();
    $template->render();

/**
   * @return Shoutbox
   */