<?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}`");
    }
    
}

?>