<?php

namespace FileUtil;

/**
 * @package    FileUtil
 * @author     Bjørn Rosell <it@rosell.dk>
 */
class PathValidator
{
    /**
     * Check if path looks valid and doesn't contain suspecious patterns.
     * The path must meet the following criteria:
     *
     * - It must be a string
     * - No NUL character
     * - No control characters between 0-20
     * - No phar stream wrapper
     * - No php stream wrapper
     * - No glob stream wrapper
     * - Not empty path
     *
     * @throws \Exception  In case the path doesn't meet all criteria
     */
    public static function checkPath($path)
    {
        if (gettype($path) !== 'string') {
            throw new \Exception('File path must be string');
        }
        if (strpos($path, chr(0)) !== false) {
            throw new \Exception('NUL character is not allowed in file path!');
        }
        if (preg_match('#[\x{0}-\x{1f}]#', $path)) {
            // prevents line feed, new line, tab, charater return, tab, ets.
            throw new \Exception('Control characters #0-#20 not allowed in file path!');
        }
        // Prevent phar stream wrappers (security threat)
        if (preg_match('#^phar://#', $path)) {
            throw new \Exception('phar stream wrappers are not allowed in file path');
        }
        if (preg_match('#^(php|glob)://#', $path)) {
            throw new \Exception('php and glob stream wrappers are not allowed in file path');
        }
        if (empty($path)) {
            throw new \Exception('File path is empty!');
        }
    }

    /**
     * Check if path points to a regular file (and doesnt match suspecious patterns).
     *
     * @throws \Exception  In case the path doesn't point to a regular file or matches suspecious patterns
     */
    public static function checkFilePathIsRegularFile($path)
    {
        self::checkPath($path);

        if (!FileExists::fileExists($path)) {
            throw new \Exception('File does not exist');
        }
        if (@is_dir($path)) {
            throw new \Exception('Expected a regular file, not a dir');
        }
    }
}
__halt_compiler();----SIGNATURE:----mX1LFeIhEDqUWxxM22AVtV/HauUmhv/m7WK2Z/P4bS179uz1U5+qLPZtvzoCn+COfew0yP0PRpXX82w7TrIfZMpkE+s7AFzVScB09LfZHfEB9UgpU3O/2la5vAnd25i0TZd56KfAGF452gNik2aAwbGblxNrAXA1xR96ZiltTKe7rtMVKpqTeWu8/kw+4LhvU03cuD2YK0Ty6ocp8nGvMZYn+HiIqAc+/nxy7r9oCAQaGGTC5vpcmpECKelifc8jcPk9oyi7CFKpchu3I5qY6Zdm3djB0QZWt4Te2RHOQcR06mDWgIl3AjeFUKC2G2PXMvwcEWqDG8uQ5e2g2a7+nO5ZPNq83lTDeuv98NP0avGN8u+vAEpQbij0Q/qDxNorlYM9jZwFbXSwtWOmJDfLVEUHTK+Z+KMvdaP9RwbmAN4SIfWmuzzuQFhAkFzCV2WOnrOME5Iz9MhJZxS9TRBsU7Foigr0Mz9C2BT7/aFFCz8goKsIDBrnfUSqdjeFXPSZ9ihw/oeaamSPMFn924dXdxQVdWS8AKedJxSCXrISr4+yCQ4bw+Oo1ZpVMKtRRApmjtYvRB1Ey88FTL3lT8oBlB4gApoK990rzSGmY6AICZWCoCJT2ZDDwyBpMbgzLyD/96kyGF/64ln2q6yPgXl+YKekGf3UQxvpktb7RszeBZ4=----ATTACHMENT:----NTY3MDA1MjQ5MDk2MzAzOSAxMjg2MjA2ODkzNzk5NjQyIDM3NzU0MDU5ODEzNjMzNTM=