<?php
namespace ProcessMaker\Util;

class Common
{
    /**
     * Recursive version of glob php standard function
     *
     * @author Erik Amaru Ortiz <erik@colosa.com, aortiz.erik@gmail.com>
     * @param string $pattern pattern for native glob function
     * @param int|string $flags any valid flag for glob function
     * @param bool $onlyFiles to filter return array with only matched files, or all matched results
     * @return array array containing the recursive glob results
     *
     * Example:
     *
     *   Common::rglob("/example/path/*");
     *
     * it will returns:
     *
     *   Array
     *   (
     *       [0] => /example/path/README.txt
     *       [1] => /example/path/composer.json
     *       [4] => /example/path/one/one_text.txt
     *       [6] => /example/path/two/two_text.txt
     *       [7] => /example/path/two/two_one/two_one_text.txt
     *       [8] => /example/path/two/two_one/build.json
     *   )
     *
     * Example 2:
     *
     *   Common::rglob("/example/path/*.json");
     *
     * it will returns:
     *
     *   Array
     *   (
     *       [0] => /example/path/composer.json
     *       [1] => /example/path/two/two_one/build.json
     *   )
     */
    public static function rglob($pattern, $flags = 0, $onlyFiles = false)
    {
        $singlePattern = basename($pattern);

        if (strpos($singlePattern, "*") !== false) {
            $path = rtrim(str_replace($singlePattern, "", $pattern), DIRECTORY_SEPARATOR);
        } else {
            $singlePattern = "";
            $path = $pattern;
        }

        $files = glob("$path/$singlePattern", $flags);
        $dirs = glob("$path/*", GLOB_MARK|GLOB_ONLYDIR|GLOB_NOSORT);

        foreach ($dirs as $dir) {
            $files = array_merge($files, self::rglob("$dir/$singlePattern", $flags));
        }

        if ($onlyFiles) {
            $files = array_filter($files, function($v) { return is_dir($v) ? false : true;});
        }

        return $files;
    }

    /**
     * Returns the last version given a pattern of file name
     *
     * @param string $pattern a valid pattern for glob(...) native function
     * @param int $flag php flags for glob(...) native function
     * @return int
     */
    public static function getLastVersion($pattern, $flag = 0)
    {
        $files = glob($pattern, $flag);
        $maxVersion = 0;

        foreach ($files as $file) {
            $filename = basename($file);

            if (preg_match("/-([0-9]+)/", $filename, $match)) {
                if ($maxVersion < $match[1]) {
                    $maxVersion = $match[1];
                }
            }
        }

        return $maxVersion;
    }
}