<?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:----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----ATTACHMENT:----OTUwOTUwMjM5NDg2MjUzIDU5NjgxNjI1Mzg1MTE0MTUgNTYzMTAzMjE1NDY4NzgyMA==