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

load::sys_func('file');

class uninstall {

    private $appno;    //应用NO值
    private $m_name;  //应用文件夹
    private $del_dirs = [];  //需要删除的文件夹，以根目录为准
    
    public function __construct() {
        global $_M;
        
        $this->appno    = $_M['form']['no'];    //获取NO

        //需要删除的文件名
        $this->del_dirs[]   = self::firstsql();  
        $this->del_dirs[]   = $this->m_name?'app/app/'.$this->m_name:'';
        
        //判断是否允许卸载
        if(file_exists(PATH_ALL_APP. $this->m_name."/config/uninstall.lock")){
            turnover("{$_M['url']['own_form']}a=doindex","禁止卸载");
        }
        
    }

    public function dodel() {
        global $_M;
        //删除一些提前删除的内容

        //删除自定义表
        self::zdysql();
        
        //删除固定的app表
        self::appsql();
        
        //删除应用文件
//        $this->delfile();
    }
    
    //优先执行代码[推荐]
    private function firstsql() {
        global $_M;
        //查询应用的文件夹
        $mname    = self::sqlone('applist');
        $this->m_name = $mname['m_name'];
        //查询应用是否使用栏目
        $file   = self::sqlone('column'," module='{$this->appno}' ");
        return $file['foldername'];
    }

    //删除自定义表
    private function zdysql() {
        global $_M;
        //公用表
        $cloud  = ['cloud_config'];
        //自定义表
        $table  = file_get_contents(PATH_ALL_APP.$this->m_name.'/config/table');
        $table  = stringto_array($table,',');
        //自定义表删除
        $zdy    = array_diff($table,$cloud);
        $zdys   = [];
        foreach ($zdy   as $val){
            $zdys[] = $this->m_name.'_'.$val;
        }
        //删除公用表对应应用数据，并查询是否符合删除表的要求
        foreach ($cloud as $val) {
            //判断是否要删除
            if(in_array($val, $table)) $zdys[]  = self::cloud($val);
        }
        //删除表
        foreach ($zdys as $val){
            self::deltablesql($val);
        }
        //删除配置文件
        del_table(arrayto_string($zdys,'|'));
    }

    //删除固定的app表
    private function appsql() {
        global $_M;
        //删除栏目接口表
        self::delsql('ifcolumn');
        
        //删除应用生成文件所调用事件的信息表
        self::delsql('ifcolumn_addfile');
        
        //删除会员侧导航信息表
        self::delsql('ifmember_left');
        
        //删除应用插件表
        self::delsql('app_plugin');

        //删除网站后台栏目信息表
        $where  = "field='{$this->appno}'";
        self::delsql('admin_column',$where);
        
        //删除网站栏目信息表
        $where  = "module='{$this->appno}'";
        self::delsql('column',$where);
        
        //删除语言表
        $where  = "app='{$this->appno}'";
        self::delsql('language',$where);
        
        //删除应用注册表
        self::delsql('applist');
    }

    //删除应用文件夹
    private function delfile() {
        foreach ($this->del_dirs as $dir){
            if(file_exists(PATH_WEB.$dir) && $dir != null) deldir(PATH_WEB.$dir);
        }
    }
    
    //对公用配置表卸载处理
    private function cloud($tname) {
        global $_M;
        $where  = "m_name='{$this->m_name}'";
        if(self::sqlcounter($tname,$where) > 0){
            self::delsql($tname,$where);
        }
        if(self::sqlcounter($tname) == 0){
            return $tname;
        }
    }
    
    //公共查询方法
    private function sqlone($tname,$where = '') {
        global $_M;
        $table  = $_M['table'][$tname];
        if(!$where){
            $where  = "no='{$this->appno}'";
        }
        return DB::get_one("select * from {$table} where {$where}");
    }
    
    //公共查询方法
    private function sqlcounter($tname,$where = '') {
        global $_M;
        $table  = $_M['table'][$tname];
        if($where){
            $where  = 'WHERE '.$where;
        }
        return DB::counter("{$table} {$where}");
    }
    
    //公共删除数据
    private function delsql($tname,$where = '') {
        global $_M;
        $table  = $_M['table'][$tname];
        if(!$where){
            $where  = "no='{$this->appno}'";
        }
        DB::query("DELETE FROM {$table} WHERE {$where}");
    }
    
    //公共删除表
    private function deltablesql($tname) {
        global $_M;
        $table  = $_M['table'][$tname];
        DB::query("DROP TABLE `{$table}`");
    }

}
?>