<?php

namespace HtmlDriven\CorsProxy;

use HtmlDriven\CorsProxy\Exception\FileNotFoundException;

/**
 * Provides some helper methods.
 *
 * @author RebendaJiri <jiri.rebenda@htmldriven.com>
 */
class Helpers
{
    /**
     * Check whether given file exists.
     *
     * @param string
     * @return void
     * @throws FileNotFoundException
     */
    public static function checkFileExists($file)
    {
        if (!is_file($file)) {
            throw new FileNotFoundException(sprintf("File '%s' does not exist or not accessible.", $file));
        }
    }

    /**
     * Makes sure the path is absolute.
     *
     * @param string
     * @param string
     * @return string
     */
    public static function absolutizeFilepath($rootPath, $filepath)
    {
        if (substr($filepath, 0, 1) === '.') {
            $filepath = $rootPath . DIRECTORY_SEPARATOR . $filepath;
        }
        return $filepath;
    }
}