registry-container/src/CategoriesContainer.php

<?php
/**
 * Created by PhpStorm.
 * User: lcdee
 * Date: 31.05.2017
 * Time: 12:57
 */

namespace AlexLcDee\RegistryContainer;


class CategoriesContainer
{
    /**
     * @var ItemsContainer[]
     */
    private $data = [];

    /**
     * Add new category in container
     * @param string $key
     * @param ItemsContainer $value
     */
    public function add(string $key, ItemsContainer $value)
    {
        $this->data[$key] = $value;
    }

    /**
     * Check if container has category
     * @param string $key
     * @return bool
     */
    public function has(string $key)
    {
        return isset($this->data[$key]);
    }

    /**
     * Get category from container
     * @param string $key
     * @return ItemsContainer
     * @throws RegistryException
     */
    public function get(string $key)
    {
        if(!$this->has($key)) {
            throw new RegistryException('Category not found in registry of shown items');
        }
        return $this->data[$key];
    }
}