Module.php

<?php

namespace darealfive\media;

use darealfive\base\behaviors\property\DirectoryBehavior;
use yii\base\InvalidConfigException;

/**
 * Class Module
 *
 * @package darealfive\media
 * @property \yii\base\Module $module
 * @property string           $imageBasePath the configurable directory in which the images are located.
 */
class Module extends \darealfive\base\Module
{
    /**
     * Configures virtual property $imageBasePath as a directory to store images
     *
     * @return array
     */
    public function behaviors()
    {
        return array_merge(parent::behaviors(), [
            'imageBasePathDirectory' => [
                'class'        => DirectoryBehavior::class,
                'propertyName' => 'imageBasePath'
            ]
        ]);
    }

    /**
     * Checks that this module is configured properly
     *
     * @throws InvalidConfigException
     */
    public function init()
    {
        parent::init();
        if (!is_dir($this->imageBasePath)) {

            throw new InvalidConfigException(sprintf('Path "%s" is not a directory', $this->imageBasePath));
        }
    }
}