<?php
if (!defined('__ACCESS_PLUGIN_ROOT__')) {
    throw new Exception('Boostrap file not found');
}

class Access_UA
{
    private static $robots = array(
        'TencentTraveler',
        'Baiduspider',
        'BaiduGame',
        'Googlebot',
        'msnbot',
        'Sosospider+',
        'Sogou web spider',
        'ia_archiver',
        'Yahoo! Slurp',
        'YoudaoBot',
        'Yahoo Slurp',
        'MSNBot',
        'Java (Often spam bot)',
        'BaiDuSpider',
        'Voila',
        'Yandex bot',
        'BSpider',
        'twiceler',
        'Sogou Spider',
        'Speedy Spider',
        'Google AdSense',
        'Heritrix',
        'Python-urllib',
        'Alexa (IA Archiver)',
        'Ask',
        'Exabot',
        'Custo',
        'OutfoxBot/YodaoBot',
        'yacy',
        'SurveyBot',
        'legs',
        'lwp-trivial',
        'Nutch',
        'StackRambler',
        'The web archive (IA Archiver)',
        'Perl tool',
        'MJ12bot',
        'Netcraft',
        'MSIECrawler',
        'WGet tools',
        'larbin',
        'Fish search',
        'crawler',
        'bingbot',
        'YisouSpider',
    );
    private $ua;
    private $ual;
    
    private $osID      = null;
    private $osName    = null;
    private $osVersion = null;
    
    private $robotID      = null;
    private $robotName    = null;
    private $robotVersion = null;
    
    private $browserID      = null;
    private $browserName    = null;
    private $browserVersion = null;

    function __construct($ua) {
        $this->ua = $ua;
        $this->ual = $this->filter($ua);
    }

    public static function filter($str)
    {
        return self::removeSpace(strtolower($str));
    }

    protected static function removeSpace($str)
    {
        return preg_replace('/\s+/', '', $str);
    }

    /**
     * 获取完整UA信息
     *
     * @access public
     * @return string
     */
    public function getUA() {
        return $this->ua;
    }

    /**
     * 获取是否是爬虫
     *
     * @access public
     * @return bool
     */
    public function isRobot()
    {
        if ($this->robotID === null) {
            if (!empty($this->ua)) {
                if (preg_match('#([a-zA-Z0-9]+(?:bot|spider))[ /]*([0-9.]*)#i', $this->ua, $matches)) {
                    $this->robotID = $this->robotName = $matches[1];
                    $this->robotVersion = $matches[2];
                }
                foreach (self::$robots as $val) {
                    if (strpos($this->ual, $this->filter($val)) !== false) {
                        $this->robotID = $this->robotName = $val;
                        $this->robotVersion = $val;
                    }
                }
                $this->robotID = $this->robotName = '';
            } else {
                $this->robotID = $this->robotName = '';
            }
        }
        return $this->robotID !== '' || $this->robotName !== '';
    }

    /**
     * 获取爬虫ID
     *
     * @access public
     * @return string
     */
    public function getRobotID()
    {
        return $this->isRobot() ? $this->robotID : '';
    }

    /**
     * 获取爬虫版本
     *
     * @access public
     * @return string
     */
    public function getRobotVersion()
    {
        return $this->isRobot() ? $this->robotVersion : '';
    }

    /**
     * 解析操作系统信息
     *
     * @access private
     * @return bool
     */
    private function parseOS()
    {
        if ($this->osID === null) {
            if (preg_match('/Windows NT 6.0/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = 'Vista';
            } elseif (preg_match('/Windows NT 6.1/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = '7';
            } elseif (preg_match('/Windows NT 6.2/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = '8';
            } elseif (preg_match('/Windows NT 6.3/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = '8.1';
            } elseif (preg_match('/Windows NT 10.0/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = '10';
            } elseif (preg_match('/Windows NT 5.1/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = 'XP';
            } elseif (preg_match('/Windows NT 5.2/i', $this->ua) && preg_match('/Win64/i', $this->ua)) {
                $this->osID = $this->osName = 'Windows';
                $this->osVersion = 'XP (64 bit)';
            } elseif (preg_match('/Android ([0-9.]+)/i', $this->ua, $matches)) {
                $this->osID = $this->osName = 'Android';
                $this->osVersion = $matches[1];
            } elseif (preg_match('/iPhone OS ([_0-9]+)/i', $this->ua, $matches)) {
                $this->osID = $this->osName = 'iPhone OS';
                $this->osVersion = $matches[1];
            } elseif (preg_match('/Ubuntu/i', $this->ua, $matches)) {
                $this->osID = $this->osName = 'Ubuntu';
                $this->osVersion = '';
            } elseif (preg_match('/Mac OS X ([0-9_]+)/i', $this->ua, $matches)) {
                $this->osID = $this->osName = 'Mac OS X';
                $this->osVersion = $matches[1];
            } elseif (preg_match('/Linux/i', $this->ua, $matches)) {
                $this->osID = $this->osName = 'Linux';
                $this->osVersion = '';
            } else {
                $this->osID = '';
                $this->osName = '未知';
                $this->osVersion = '';
            }
        }
        return $this->osID !== '' || $this->osName !== '';
    }

    /**
     * 获取操作系统ID
     *
     * @access public
     * @return string
     */
    public function getOSID() {
        return $this->parseOS() ? $this->osID : '';
    }

    /**
     * 获取操作系统名字
     *
     * @access public
     * @return string
     */
    public function getOSName() {
        return $this->parseOS() ? $this->osName : '';
    }

    /**
     * 获取操作系统版本号
     *
     * @access public
     * @return string
     */
    public function getOSVersion() {
        return $this->parseOS() ? $this->osVersion : '';
    }

    /**
     * 解析浏览器信息
     *
     * @access private
     * @return bool
     */
    private function parseBrowser() {
        if ($this->browserName === null) {
            if (preg_match('#(Camino|Chimera)[ /]([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Camino';
                $this->browserVersion = $matches[2];
            } elseif (preg_match('#SE 2([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = 'SE 2';
                $this->browserName = '搜狗浏览器 2';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#360([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = '360';
                $this->browserName = '360浏览器';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#Maxthon( |\/)([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Maxthon';
                $this->browserVersion = $matches[2];
            } elseif (preg_match('#Edge/([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Edge';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#Chrome/([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Chrome';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#XiaoMi/MiuiBrowser/([0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = '小米浏览器';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#Safari/([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Safari';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#opera mini#i', $this->ua)) {
                preg_match('#Opera/([a-zA-Z0-9.]+)#i', $this->ua, $matches);
                $this->browserID = $this->browserName = 'Opera Mini';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#Opera.([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Opera';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#TencentTraveler ([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = 'TencentTraveler';
                $this->browserName = '腾讯TT浏览器';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#UCWEB([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'UCWEB';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#MSIE ([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Internet Explorer';
                $this->browserVersion = $matches[1];
            } elseif (preg_match('#Trident#', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Internet Explorer';
                $this->browserVersion = '11';
            } elseif (preg_match('#(Firefox|Phoenix|Firebird|BonEcho|GranParadiso|Minefield|Iceweasel)/([a-zA-Z0-9.]+)#i', $this->ua, $matches)) {
                $this->browserID = $this->browserName = 'Firefox';
                $this->browserVersion = $matches[2];
            } else {
                $this->browserID = '';
                $this->browserName = '未知';
                $this->browserVersion = '';
            }
        }
        return $this->browserID !== '' || $this->browserName !== '';
    }

    /**
     * 获取浏览器ID
     *
     * @access public
     * @return string
     */
    public function getBrowserID() {
        return $this->parseBrowser() ? $this->browserID : '';
    }

    /**
     * 获取浏览器名字
     *
     * @access public
     * @return string
     */
    public function getBrowserName() {
        return $this->parseBrowser() ? $this->browserName : '';
    }

    /**
     * 获取浏览器版本号
     *
     * @access public
     * @return string
     */
    public function getBrowserVersion() {
        return $this->parseBrowser() ? $this->browserVersion : '';
    }
}