GBPost::pathToWork PHP Method

    static function pathToWork($slug, $strptime = null)
    {
        $cachename = self::cachenameFromURI($slug, $strptime);
        $basedir = gb::$site_dir . '/content/posts/';
        $glob_skip = '/(\\.comments|\\/)$/';
        # first, try if the post resides under the cachename, but in the workspace:
        $path = $basedir . $cachename;
        if (is_file($path)) {
            return $path;
        }
        # try any file with the cachename as prefix
        if ($path = gb::glob($path . '*', $glob_skip)) {
            return $path;
        }
        # next, try a wider glob search
        # todo: optimise: find minimum time resolution by examining $posts_cn_pattern
        #                 for now we will assume the default resolution/granularity of 1 month.
        $path = $basedir . gmstrftime('{%Y,%y,%G,%g}{?,/}%m', gb_mkutctime($strptime)) . '{*,*/*,*/*/*,*/*/*/*}' . $strptime['unparsed'] . '*';
        if ($path = gb::glob($path, $glob_skip)) {
            return $path;
        }
        # we're out of luck :(
        return null;
    }