<?php
namespace Cas\Dao;
use KIF\Dao\DBAgileDev;
use KIF\Data\ResultWrapper;
use KIF\Math\Math;
use KIF\Verify;
/**
 * 
 * 后台用户
 * @author lishumingoo@gmail.com
 */
class BackUser extends DBAgileDev {
	protected $tableName = 'back_user';
	
	protected $primaryKey = 'uid';
	
	/**
	 * 数据库里的真实字段
	 * @var array
	 */
	protected $other_field = array(
		'name',
		'password',
		'email',
		'project',
		'permission',
	);
	
	public function __construct($master_flag = 'backend') {
		parent::__construct($master_flag);
	}
	
	public function add(array $info) {
		$name = $info['name'];
    	if (empty($name)) {
    		return ResultWrapper::fail('name字段不能为空');
    	}

    	$name = mb_strtolower($name, 'UTF-8');

    	# 这是数据表存储上的逻辑
    	if (mb_strlen($name) > 40) {
    		return ResultWrapper::fail('name字段超出了40个字');
    	}

    	$password = $info['password'];
        if (empty($password)) {
            return ResultWrapper::fail('password字段不能为空');
        }
        $password = Math::md5_16($password);

    	$email = $info['email'];
//     	if (empty($email)) {
//     		return ResultWrapper::fail('email字段不能为空');
//     	}
    	
        # 这是数据表存储上的逻辑
        if (mb_strlen($email) > 50) {
            return ResultWrapper::fail('email字段超出了50个字');
        }

        if (isset($info['register_time']) && Verify::int($info['register_time'])) {
        	$register_time = $info['register_time'];
        } else {
        	$register_time = time();
        }

        $tableInfo = array_merge($info, array(
            'name'              => $name,
            'password'          => $password,
            'email'             => $email,
            'register_time'     => $register_time,
        ));

        $uid = parent::add($tableInfo, self::PARAM_CREATE_ACTION_INSERT_IGNORE);
        if (!$uid) {
        	return ResultWrapper::fail('插入用户库失败');
        }

        if (!Verify::int($uid)) {
        	return ResultWrapper::fail("用户名 {$name} 已存在");
        }

        $user = $tableInfo;
        $user[$this->primaryKey] = $uid;

        return ResultWrapper::success($user);
	}
	
	/**
	 * 
	 * 根据用户名、密码获取用户信息
	 * @param string $name
	 * @param string $password
	 * @return ResultWrapper
	 */
	public function getByNameAndPassword($name, $password) {
		$user = $this->getByName(mb_strtolower($name, 'UTF-8'));
		if (!$user) {
			return ResultWrapper::fail("用户 {$name} 不存在");
		}
		if ($user['password'] != Math::md5_16($password)) {
			return ResultWrapper::fail("密码 {$password} 不正确");
		}
		
		return ResultWrapper::success($user);
	}
	
	public function getByName($name) {
		$uid = $this->getIdByName($name);
		return $this->get($uid);
	}
	
	/**
	 * 
	 * 获取指定用户名 $name 的用户id
	 * @param string $name
	 * @return false | int
	 */
	public function getIdByName($name) {
		if (empty($name)) {
			return false;
		}
	
		$condition = array(
			'name'   => $name,
		);
		$result = $this->fetchOne($condition, $this->primaryKey);
		if (!$result) {
			return false;
		}
		return array_pop($result);
	}
	
	/**
	 * 修改用户密码
	 * @param int $uid
	 * @param string $oldPassword
	 * @param string $newPassword
	 * @return ResultWrapper
	 */
	public function modifyPassword($uid, $oldPassword, $newPassword) {
		if (!Verify::unsignedInt($uid)) {
			return ResultWrapper::fail('无效uid');
		}
	
		$user = $this->get($uid);
		if ($user['password'] != Math::md5_16($oldPassword)) {
			return ResultWrapper::fail('原始密码错误');
		}
	
		$newPassword = trim($newPassword);
		if (empty($newPassword)) {
			return ResultWrapper::fail('新密码不能为空');
		}
	
		$newPassword = Math::md5_16($newPassword);
		$info = array(
			'uid'	=> $uid,
			'password'	=> $newPassword,
		);
	
		$cas_token = $user['cas_token'];
		$tmpResult = $this->modify($info, null, $cas_token);
		if (!$tmpResult->isSuccess()) {
			return ResultWrapper::fail('修改密码失败。原因:'.$tmpResult->getData());
		}
	
		return ResultWrapper::success();
	}
}