<?php
namespace Users;

use \Helpers\View as view;
use \Helpers\dbh as dbh;
use \Users\Account;
use \Helpers\Table;

/*
对 \Users\Account 再次进行抽象，满足后台调用的需求，屏蔽一些错误等等
!!!!important!!!!大部分操作直接来自 \User\Account，慎重修改
*/
class Users
{	
	private $db;
	protected $events = NULL;		//事件
	public $table;
	
	public $account;

	function __construct($accountClass = FALSE,$db = NULL)
	{
		if(empty($db))
		{
			$this->db = \Zend_Registry::get('db');
		}else{
			$this->db = $db;
		}
		
		$this->table = new Table();
		
		$this->config = \Zend_Registry::get('config');
		
		if($accountClass === TRUE)
		{
			$this->account = new Account();
		}
	}
	
	//通过email地址返回用户信息是否存在
	public function userExists($email = NULL)
	{
		if(empty($email))
		{
			return false;
		}
		
		if(empty($this->account))
		{
			$account = new Account(FALSE);
		}else{
			$account = $this->account;
		}
		
		$sql = "SELECT * FROM {$account->memberTable} WHERE {$account->FieldEmail}=? LIMIT 1";
		$sth = $this->db->prepare($sql);
		$sth->execute(array($email));
		$row = $sth->fetch();
		
		unset($account);
		
		if(isset($row['id']) && !empty($row['id']))
		{
			return $row;
		}else{
			return false;
		}
	}

    /**
     * 封禁用户
     * @param $userid
     * @return bool
     */
    public function ban($userid)
    {
        if(!is_numeric($userid) || $userid < 1)
        {
            return false;
        }

        $sql = "UPDATE users SET status=-1 WHERE id=$userid";
        $rs = $this->db->exec($sql);

        if($rs > 0)
        {
            return true;
        }else{
            return false;
        }
    }//ban

    /**
     * 解禁用户
     * @param $userid
     * @return bool
     */
    public function unban($userid)
    {
        if(!is_numeric($userid) || $userid < 1)
        {
            return false;
        }

        $sql = "UPDATE users SET status=1 WHERE id=$userid";
        $rs = $this->db->exec($sql);

        if($rs > 0)
        {
            return true;
        }else{
            return false;
        }
    }
}