<?php
namespace imcat;

//缓存类
class extCache{

    protected $cache = NULL;
    
    function __construct($ucfg=array()) {
        $cfg = glbConfig::read('cache', 'ex');
        if(!empty($ucfg)){
            $cfg = array_merge($cfg, $ucfg);
        }
        $driver = $cfg['type'];
        require_once DIR_IMCAT . '/adpt/cache/' . $driver . '.php';
        $this->cache = new $driver($cfg);
    }

    //读取缓存
    function get($key) {
        return $this->cache->get($key);   
    }
    
    //设置缓存
    function set($key, $value, $expire=1800) {
        return $this->cache->set($key, $value, $expire);
    }
    
    //自增1
    function inc($key, $value = 1) {
        return $this->cache->inc($key, $value);    
    }
    
    //自减1
    function des($key, $value = 1) {
        return $this->cache->des($key, $value);    
    }
    
    //删除
    function del($key) {
        return $this->cache->del($key);
    }
    
    //清空缓存
    function clear() {
        return $this->cache->clear();    
    }

    // static-functions

    // cache-time : 30s,60m,12h,7d,4w,12M; 默认单位(m)min
    static function CTime($ctime=30){ 
        if(is_numeric($ctime) || strpos($ctime,'m')){
            $ctime = intval($ctime)*60; 
        }elseif(strpos($ctime,'h')){
            $ctime = intval($ctime)*3600;
        }elseif(strpos($ctime,'d')){
            $ctime = intval($ctime)*86400;
        }elseif(strpos($ctime,'w')){
            $ctime = intval($ctime)*86400*7;
        }elseif(strpos($ctime,'M')){ // 30天
            $ctime = intval($ctime)*86400*30;
        }else{ 
            $ctime = intval($ctime);
        }
        $ctime<300 && $ctime = 86400; //最小300s
        return $ctime;
    }
    // cache-path, dir: /12/34/ab 
    static function CPath($sKey, $mkdir=0, $base=''){
        $file = $sKey; $kmd5 = md5($sKey); $aDir = array();
        for($i=0;$i<5;$i=$i+2){ $aDir[] = substr($kmd5,$i,2); }
        if($mkdir){
            $base = $base ? $base : DIR_DTMP.'/cache';
            foreach(array(0,1,2) as $k){
                $tmp = $base.'/'.$aDir[$k];
                if(!is_dir($tmp)){
                    $flag = mkdir($tmp, 0666);
                    if(!$flag) return false;
                }
                $base = $tmp;
            }
        }
        $tb1 = ['/', '+', '*', '|', '?',   ':', '%', '&'];
        $tb2 = ['~', '-', '.', '!', '---', ';', '',  '^'];
        $file = str_replace($tb1, $tb2, $file); 
        $file = basStr::filTitle($file); //del:&,#
        if(strlen($file)>150) $file = substr($file,0,120).'---'.md5($file);
        $dir = '/'.implode('/', $aDir);
        return array('dir'=>$dir, 'file'=>$file);
    }

    // cache-file-set: Set,Get
    static function cfSet($file, $data, $bdir='dtmp'){
        if(is_array($data)) $data = json_encode($data);
        comFiles::chkDirs($file, $bdir);
        $bdir = comStore::cfgDirPath($bdir);
        comFiles::put($bdir.$file, $data);
    }
    // cache-file-get: re: 0=fp,str,arr,
    static function cfGet($file, $ctime=30, $bdir='dtmp', $re=0){ 
        $ctime = extCache::CTime($ctime);
        $bdir = comStore::cfgDirPath($bdir);
        if(file_exists($bdir.$file)){
            $last = filemtime($bdir.$file);
            if($last + $ctime > $_SERVER["REQUEST_TIME"]){
                if(empty($re)) return $bdir.$file;  
                $data = comFiles::get($bdir.$file);
                if($re=='str') return $data;
                if(empty($data) || is_numeric($data)) return $data;
                if(substr($data,0,2)=='{"' || substr($data,0,1)=='"'){
                    $data = json_decode($data, 1);
                }
                return $data;
            }
        }
        return false;
    }

    // token-set:
    static function tkSet($kid, $token, $exp='1d'){
        $db = glbDBObj::dbObj();
        $stamp = $_SERVER["REQUEST_TIME"];
        $exp = $exp ? $stamp + extCache::CTime($exp) : 0;
        if(!empty($token)){
            if(is_array($token)) $token = json_encode($token);
            $data = array('token'=>$token,'exp'=>$exp);
        }else{ // empty:clear
            $data = array('token'=>'','exp'=>$stamp-86400);
        }
        $data['etime'] = $stamp;
        $db->table("token_store")->data($data)->where("kid='$kid'")->update(0);
    }
    // token-get:
    static function tkGet($kid, $exp=1){
        $db = glbDBObj::dbObj();
        $stamp = $_SERVER["REQUEST_TIME"];
        $row = $db->table("token_store")->where("kid='$kid'")->find();
        if($row){ 
            $token = $row['token'];
            $exp && $token = $row['exp']>=$stamp ? $token : '';
            if(empty($token) || is_numeric($token)) return $token;
            if(substr($token,0,2)=='{"' || substr($token,0,1)=='"'){
                $token = json_decode($token,1);
            }
            return $token;
        }else{
            $data = array('kid'=>$kid,'token'=>'','exp'=>0,'etime'=>$stamp);
            $db->table("token_store")->data($data)->insert(0);
            return '';
        }
    }


}
