<?php


namespace App\Libs;


/**
 * @title MyLib
 * @description MyLib
 * @package App\Service
 * @author zcstatham
 * @time 2021/1/25
 */
class MyLib
{
    public static function scanFile($path) {
        $result = array();
        $files  = scandir($path);
        foreach ($files as $file) {
            if ($file != '.' && $file != '..') {
                if (is_dir($path . '/' . $file)) {
                    self::scanFile($path . '/' . $file);
                } else {
                    $result[] = substr(basename($file), 0, -4);
                }
            }
        }
        return $result;
    }

    public static function Parser($text) {
        $doc = new Doc();
        return $doc->parse($text);
    }

    public static function GetClientIP()
    {
        global $HTTP_SERVER_VARS;
        if (isset($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"])) {
            $ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
        } elseif ($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]) {
            $ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];
        } elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"]) {
            $ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];
        } elseif (getenv("HTTP_X_FORWARDED_FOR")) {
            $ip = getenv("HTTP_X_FORWARDED_FOR");
        } elseif (getenv("HTTP_CLIENT_IP")) {
            $ip = getenv("HTTP_CLIENT_IP");
        } elseif (getenv("REMOTE_ADDR")) {
            $ip = getenv("REMOTE_ADDR");
        } else {
            $ip = "0.0.0.0";
        }
        return $ip ;
    }

    public static function GetServerIP()
    {
        $ip = '0.0.0.0';
        if (isset($_SERVER)) {
            if (isset($_SERVER['SERVER_ADDR'])) {
                $ip = $_SERVER['SERVER_ADDR'];
            } elseif (isset($_SERVER['LOCAL_ADDR'])) {
                $ip = $_SERVER['LOCAL_ADDR'];
            } elseif (isset($_SERVER['SERVER_NAME'])) {
                return gethostbyname($_SERVER['SERVER_NAME']);
            }
        } else {
            $ip = getenv('SERVER_ADDR');
        }
        return $ip;
    }

    public static function IpIsLan(string $ip)
    {
        if ($ip == '127.0.0.1') return true;
        return self::IpIsValid($ip,"192.168.0.0-192.168.255.255")
            || self::IpIsValid($ip,"172.16.0.0-172.31.255.255")
            || self::IpIsValid($ip,"10.0.0.0-10.255.255.255");
    }

    public static function IpIsValid(string $ip, string $ip_section = ''){
        $ip = trim($ip);
        $ip_section = trim($ip_section);
        if (empty($ip)) return false;
        $pattern_ip = '((25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)\.){3}(25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)';
        $pattern_ipb = '/'. $pattern_ip ."\-". $pattern_ip .'/';
        $pattern_ip = '/' . $pattern_ip . '/';
        $match_count = preg_match($pattern_ip, $ip);
        if ($pattern_ipb == '' && $match_count > 0) return true;
        if (!$match_count || ($ip_section != '' && preg_match($pattern_ipb, $ip_section))) return false;
        list($ip_min, $ip_max) = explode('-', $ip_section);
        $ip_min = explode('.', $ip_min);
        $ip_max = explode('.', $ip_max);
        $ips = explode('.', $ip);
        for($i = 0; $i < 4; $i ++) {
            if($ips[$i] > $ip_max[$i] || $ips[$i] < $ip_min[$i]) return false;
        }
        return true;
    }

}