<?php
defined('IN_MET') or exit ('No permission');

load::own_class('appadmin');
load::own_class('../traits/tdata');
load::own_class('../traits/tlist');
load::own_class('../traits/tfield');

//表格
class backups extends appadmin {
    
    //备份字段
    private $bsign = true;
    
    //列表
    private $list = [];
    //当前执行表名
    private $sqlk;
    //form数组
    private $form = [];

    //info_on 快速URL
    private $own_name_info;
    
    private $bacname = '';   //默认开头
    private $csvname = '';   //文件名
    
    private $title  = [];      //表格标头
    private $keys   = [];      //表格标头对应的键值
    
    private $bactable = '';  //数据库名
    private $bacconds = '';  //查询项以及排序
    private $bacfield = '';  //查询字段
    private $bacpages = 500; //每页查询条数

    public function __construct() {
        global $_M,$_YW;
        parent::__construct();
        $this->form = $_M['form'];
        if($this->form['tname']){
            $this->tname    = $this->form['tname'];
            $this->sqlk     = $_YW['k'][$this->tname];
        }
        $this->own_name_info    = $_M['url']['own_name'].'c=info_on&a=do';
    }
    
    use tdata;
    use tfield;
    use tlist;
    
    //表格数据
    public function doindex() {
        global $_M;
        self::csvtitle();
        $this->bacname  = '广告位';
        self::csvname();
        
        //输出头部
        header("Content-type:text/csv");
        header("Content-Disposition:attachment;filename=" . $this->csvname);
        header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
        header('Expires:0');
        header('Pragma:public');
        //刷新buffer
        ob_flush();
        flush();
        $file = fopen('php://output', 'a');
        
        //先将标题写入文件
        $title = self::arrzbm($this->title, 'utf-8', 'GBK');
        fputcsv($file, $title);
        ob_flush();
        flush();
        
        # 初始化mysql需要的参数
        self::bactable();
        # 获取数据总条数
        $total    = self::tabletotal();
        $pages    = ceil($total/$this->bacpages);
        for ($i = 0; $i < $pages; $i++){
            $data   = self::tabledata($i);
            $y = 0;
            $listnum = 1000;
            foreach ($data as $val) {
                //返回数据
                $y++;
                # 每隔$listnum行，刷新一下输出buffer,大数据量时处理
                # 刷新一下输出buffer，防止由于数据过多造成问题
                if ($listnum == $y) {
                    ob_flush();
                    # 刷新buffer
                    flush();
                    $y = 0;
                }
                $arr = self::arrzbm($val,'utf-8' , 'GBK');
                fputcsv($file, $arr);
            }
        }
        fclose($file);
    }
    
    //判断语句组合
    protected function bactable() {
        global $_M;
        $this->bactable     = self::td_sqlk();
        $this->bacfield     = self::td_field();
        
        $where  = self::td_where();
        parent::where_id($where);
        
        if($where){
            $where = trim($where);
            if (strtolower(substr($where, 0, 5)) != 'where' && $where) $this->bacconds = " WHERE {$where} ";
        }
        //排序
        if($this->bacconds){
            $order  = self::td_order();
            $this->bacconds .= " ORDER BY {$order} ";
        }
        return $this;
    }
    
    //计算总数
    protected function tabletotal() {
        global $_M;
        $countsql   = " SELECT COUNT(*) FROM {$this->bactable} {$this->bacconds} ";
        if($this->multi_table) $countsql = " SELECT count(*) FROM (SELECT {$this->bacfield} FROM {$this->bactable} {$this->bacconds}) num ";
        $result = DB::query($countsql);
        $fetch_row = DB::fetch_row($result);
        return $fetch_row[0];
    }
    
    //获取获取
    protected function tabledata($pages) {
        global $_M;
        $cursize  = $pages* $this->bacpages;
        //SQL查询
        $result = DB::query("SELECT {$this->bacfield} FROM {$this->bactable} {$this->bacconds} LIMIT {$cursize},{$this->bacpages}");
        while($val = DB::fetch_array($result)){
            $data[]   = $val;
        }
        
        //处理数组结果
        foreach ($data as $val) {
            $lists  = self::{$this->tname}($val);
            $baclist[]    = array_intersect_key(self::striptags($lists),$this->title);
        }
        return $baclist;
    }
    
    /*     * *******************************************************************************
     * 
     *                                  导入导出公用函数
     * 
     * ****************************************************************************** */


    # 导入导出数组(保持和导入格式一样)
    protected function csvtitle() {
        global $_M, $_YW;
        $this->title    = self::{'tf_'.$this->tname}();
        $this->keys     = array_keys($this->title);
        return $this;
    }
    
    //生成文件名
    public function csvname() {
        global $_M, $_YW;
        $date = date('Ymd', time());
        $filename = iconv("utf-8", "GBK", $this->bacname . $_M['lang'] . $date);
        $this->csvname = $filename . '.csv';
        return $this;
    }
    
    //对数组的值进行转码并返回(一维数组)
    public function arrzbm($arr, $u, $g) {
        global $_M, $_YW;
        foreach ($arr as $k => $v) {
            $newarr[$k] = iconv($u, $g, $v);
        }
        return $newarr;
    }
    
    //删除html元素
    public function striptags($array = []) {
        global $_M, $_YW;
        $ret    = [];
        foreach ($array as $key => $str) {
            $ret[$key]  = strip_tags($str);
        }
        return $ret;
    }
    
}

?>