<?php

namespace App\Filesystem;


/**
 * Base class for creating filesystem things
 *
 * @author Phil Burton <phil@d3r.com>
 */
abstract class Create
{
    /**
     * Filename to create
     *
     * @var string
     * @author Phil Burton <phil@d3r.com>
     */
    protected $filename;

    /**
     * Thing we're creating, used for messages
     *
     * @var string
     * @author Phil Burton <phil@d3r.com>
     */
    protected $thing;

    /**
     * Set filename on object and check we can wirte to the Directory
     *
     * @param string $filename
     * @author Phil Burton <phil@d3r.com>
     */
    public function __construct(string $filename)
    {
        $this->filename = $filename;

        if (!is_writable(dirname($filename))) {
            throw new \Exception('Cannot create ' . $this->thing . ' at: ' . $filename);
        }
    }

    abstract public function excecute();
}