bluetree-service/cache

<?php
/**
 * Created by PhpStorm.
 * User: michal
 * Date: 10/10/2017
 * Time: 14:27
 */

namespace BlueCache;

use \BlueCache\Storage\File;
use \BlueCache\Storage\StorageInterface;

trait Common
{
    /**
     * @var StorageInterface
     */
    protected $storage;

    /**
     * @var array
     */
    protected $config = [
        'storage_class' => File::class,
        'storage_directory' => './var/cache',
    ];

    /**
     * check that cache directory exist and create it if not
     *
     * @param array $config
     * @throws \BlueCache\CacheException
     */
    public function __construct(array $config = [])
    {
        $this->config = \array_merge($this->config, $config);

        $this->registerStorage();
    }

    /**
     * @return $this
     * @throws \BlueCache\CacheException
     */
    protected function registerStorage()
    {
        switch (true) {
            case $this->config['storage_class'] instanceof StorageInterface:
                $this->storage = $this->config['storage_class'];
                break;

            case $this->config['storage_class'] === File::class:
            case \is_string($this->config['storage_class']):
                $this->factoryStorage();
                break;

            default:
                throw new CacheException('Incorrect storage type: ' . \get_class($this->storage));
        }

        return $this;
    }

    /**
     * @return $this
     * @throws \BlueCache\CacheException
     */
    protected function factoryStorage()
    {
        $config = ['cache_path' => $this->config['storage_directory']];
        $this->storage = new $this->config['storage_class']($config);

        if (!($this->storage instanceof StorageInterface)) {
            throw new CacheException('Incorrect storage type: ' . $this->config['storage_class']);
        }

        return $this;
    }
}