<?php

// Source: https://github.com/nicxlau/hunter-php-javascript-obfuscator

namespace Fahlisaputra\Minify\Helpers;

class JsObfuscator
{
    private $code;
    private $mask;
    private $interval;
    private $option = 0;
    private $expireTime = 0;
    private $domainNames = [];

    public function __construct($Code, $html = false)
    {
        if ($html) {
            $Code = $this->cleanHtml($Code);
            $this->code = $this->html2Js($Code);
        } else {
            $Code = $this->cleanJS($Code);
            $this->code = $Code;
        }

        $this->mask = $this->getMask();
        $this->interval = rand(1, 50);
        $this->option = rand(2, 8);
    }

    private function getMask()
    {
        $charset = str_shuffle('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');

        return substr($charset, 0, 9);
    }

    private function hashIt($s)
    {
        for ($i = 0; $i < strlen($this->mask); $i++) {
            $s = str_replace("$i", $this->mask[$i], $s);
        }

        return $s;
    }

    private function prepare()
    {
        if (count($this->domainNames) > 0) {
            $code = "if(window.location.hostname==='".$this->domainNames[0]."' ";
            for ($i = 1; $i < count($this->domainNames); $i++) {
                $code .= "|| window.location.hostname==='".$this->domainNames[$i]."' ";
            }
            $this->code = $code.'){'.$this->code.'}';
        }
        if ($this->expireTime > 0) {
            $this->code = 'if((Math.round(+new Date()/1000)) < '.$this->expireTime.'){'.$this->code.'}';
        }
    }

    private function encodeIt()
    {
        $this->prepare();
        $str = '';
        for ($i = 0; $i < strlen($this->code); $i++) {
            $str .= $this->hashIt(base_convert(ord($this->code[$i]) + $this->interval, 10, $this->option)).$this->mask[$this->option];
        }

        return $str;
    }

    public function Obfuscate()
    {
        $rand = rand(0, 99);
        $rand1 = rand(0, 99);

        return "var _0xc{$rand}e=[\"\",\"\x73\x70\x6C\x69\x74\",\"\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6A\x6B\x6C\x6D\x6E\x6F\x70\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7A\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4A\x4B\x4C\x4D\x4E\x4F\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5A\x2B\x2F\",\"\x73\x6C\x69\x63\x65\",\"\x69\x6E\x64\x65\x78\x4F\x66\",\"\",\"\",\"\x2E\",\"\x70\x6F\x77\",\"\x72\x65\x64\x75\x63\x65\",\"\x72\x65\x76\x65\x72\x73\x65\",\"\x30\"];function _0xe{$rand1}c(d,e,f){var g=_0xc{$rand}e[2][_0xc{$rand}e[1]](_0xc{$rand}e[0]);var h=g[_0xc{$rand}e[3]](0,e);var i=g[_0xc{$rand}e[3]](0,f);var j=d[_0xc{$rand}e[1]](_0xc{$rand}e[0])[_0xc{$rand}e[10]]()[_0xc{$rand}e[9]](function(a,b,c){if(h[_0xc{$rand}e[4]](b)!==-1)return a+=h[_0xc{$rand}e[4]](b)*(Math[_0xc{$rand}e[8]](e,c))},0);var k=_0xc{$rand}e[0];while(j>0){k=i[j%f]+k;j=(j-(j%f))/f}return k||_0xc{$rand}e[11]}eval(function(h,u,n,t,e,r){r=\"\";for(var i=0,len=h.length;i<len;i++){var s=\"\";while(h[i]!==n[e]){s+=h[i];i++}for(var j=0;j<n.length;j++)s=s.replace(new RegExp(n[j],\"g\"),j);r+=String.fromCharCode(_0xe{$rand1}c(s,e,10)-t)}return decodeURIComponent(escape(r))}(\"".$this->encodeIt().'",'.rand(1, 100).',"'.$this->mask.'",'.$this->interval.','.$this->option.','.rand(1, 60).'))';
    }

    public function setExpiration($expireTime)
    {
        if (strtotime($expireTime)) {
            $this->expireTime = strtotime($expireTime);

            return true;
        }

        return false;
    }

    public function addDomainName($domainName)
    {
        if ($this->isValidDomain($domainName)) {
            $this->domainNames[] = $domainName;

            return true;
        }

        return false;
    }

    private function isValidDomain($domain_name)
    {
        return preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $domain_name)
            && preg_match('/^.{1,253}$/', $domain_name)
            && preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $domain_name);
    }

    private function html2Js($code)
    {
        $search = [
            '/\>[^\S ]+/s',     // strip whitespaces after tags, except space
            '/[^\S ]+\</s',     // strip whitespaces before tags, except space
            '/(\s)+/s',         // shorten multiple whitespace sequences
            '/<!--(.|\s)*?-->/', // Remove HTML comments
        ];
        $replace = [
            '>',
            '<',
            '\\1',
            '',
        ];
        $code = preg_replace($search, $replace, $code);
        $code = "document.write('".addslashes($code.' ')."');";

        return $code;
    }

    private function cleanHtml($code)
    {
        return preg_replace('/<!--(.|\s)*?-->/', '', $code);
    }

    private function cleanJS($code)
    {
        $pattern = '/(?:(?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:(?<!\:|\\\|\')\/\/.*))/';
        $code = preg_replace($pattern, '', $code);
        $search = [
            '/\>[^\S ]+/s',     // strip whitespaces after tags, except space
            '/[^\S ]+\</s',     // strip whitespaces before tags, except space
            '/(\s)+/s',         // shorten multiple whitespace sequences
            '/<!--(.|\s)*?-->/', // Remove HTML comments
        ];
        $replace = [
            '>',
            '<',
            '\\1',
            '',
        ];

        return preg_replace($search, $replace, $code);
    }
}
