HippoPHP/Hippo

<?php

/*
 * This file is part of Hippo.
 *
 * (c) James Brooks <james@alt-three.com>
 * (c) Marcin Kurczewski <rr-@sakuya.pl>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace HippoPHP\Hippo;

use HippoPHP\Hippo\Exception\FileNotFoundException;
use HippoPHP\Hippo\Exception\FileNotReadableException;
use HippoPHP\Hippo\Exception\FileNotWritableException;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use RegexIterator;

class FileSystem
{
    /**
     * @param string $path
     *
     * @return string
     */
    public function getContent($path)
    {
        if (!file_exists($path)) {
            throw new FileNotFoundException($path);
        }
        if (is_dir($path) || !is_readable($path)) {
            throw new FileNotReadableException($path);
        }

        return file_get_contents($path);
    }

    /**
     * @param string $path
     * @param string $content
     */
    public function putContent($path, $content)
    {
        $isStream = strpos($path, 'php://') !== false;

        if (!$isStream) {
            if (file_exists($path) && is_dir($path)) {
                throw new FileNotWritableException($path);
            }
            if (!is_writable(dirname($path))) {
                throw new FileNotWritableException($path);
            }
        }
        file_put_contents($path, $content);
    }

    /**
     * @param string $path
     * @param string $regex
     *
     * @return string[]
     */
    public function getAllFiles($initialDirectory, $regex = null)
    {
        $directoryIterator = new RecursiveDirectoryIterator(
            $initialDirectory,
            RecursiveDirectoryIterator::SKIP_DOTS
        );
        $flattenedIterator = new RecursiveIteratorIterator($directoryIterator);
        $iterator = $regex !== null
            ? new RegexIterator($flattenedIterator, $regex)
            : $flattenedIterator;

        $output = [];
        foreach ($iterator as $i) {
            $output[] = $i->getRealpath();
        }
        usort($output, function ($a, $b) {
            return strnatcasecmp($a, $b);
        });

        return $output;
    }
}