<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

define('HAS_ONE',1);
define('BELONGS_TO',2);
define('HAS_MANY',3);
define('MANY_TO_MANY',4);
/**
 +------------------------------------------------------------------------------
 * ThinkPHP Model模型类
 * 实现了ORM和ActiveRecords模式
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Core
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id$
 +------------------------------------------------------------------------------
 */
class Model extends Think
{
    // 操作状态
    const MODEL_INSERT      =   1;      //  插入模型数据
    const MODEL_UPDATE    =   2;      //  更新模型数据
    const MODEL_BOTH      =   3;      //  包含上面两种方式
    const MUST_VALIDATE         =   1;// 必须验证
    const EXISTS_VAILIDATE      =   0;// 表单存在字段则验证
    const VALUE_VAILIDATE       =   2;// 表单值不为空则验证
    // 当前使用的扩展模型
    private $_extModel =  null;
    // 当前数据库操作对象
    protected $db = null;
    // 主键名称
    protected $pk  = 'id';
    // 数据表前缀
    protected $tablePrefix  =   '';
    // 数据表后缀
    protected $tableSuffix   =  '';
    // 模型名称
    protected $name = '';
    // 数据库名称
    protected $dbName  = '';
    // 数据表名（不包含表前缀）
    protected $tableName = '';
    // 实际数据表名（包含表前缀）
    protected $trueTableName ='';
    // 最近错误信息
    protected $error = '';
    // 字段信息
    protected $fields = array();
    // 数据信息
    protected $data =   array();
    // 查询表达式参数
    protected $options  =   array();
    protected $_validate       = array();  // 自动验证定义
    protected $_auto           = array();  // 自动完成定义
    protected $_map           = array();  // 字段映射定义
    // 是否自动检测数据表字段信息
    protected $autoCheckFields   =   true;

    /**
     +----------------------------------------------------------
     * 架构函数
     * 取得DB类的实例对象 字段检查
     +----------------------------------------------------------
     * @param string $name 模型名称
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     */
    public function __construct($name='')
    {
        // 模型初始化
        $this->_initialize();
        // 获取模型名称
        if(!empty($name)) {
            $this->name   =  $name;
        }elseif(empty($this->name)){
            $this->name =   $this->getModelName();
        }
        // 数据库初始化操作
        // 获取数据库操作对象
        // 当前模型有独立的数据库连接信息
        $this->db = Db::getInstance(empty($this->connection)?'':$this->connection);
        // 设置表前缀
        $this->tablePrefix = $this->tablePrefix?$this->tablePrefix:C('DB_PREFIX');
        $this->tableSuffix = $this->tableSuffix?$this->tableSuffix:C('DB_SUFFIX');
        // 字段检测
        if(!empty($this->name) && $this->autoCheckFields)    $this->_checkTableInfo();
    }

    /**
     +----------------------------------------------------------
     * 自动检测数据表信息
     +----------------------------------------------------------
     * @access protected
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     */
    protected function _checkTableInfo() {
        // 如果不是Model类 自动记录数据表信息
        // 只在第一次执行记录
        if(empty($this->fields)) {
            // 如果数据表字段没有定义则自动获取
            if(C('DB_FIELDS_CACHE')) {
                $this->fields = F('_fields/'.$this->name);
                if(!$this->fields)   $this->flush();
            }else{
                // 每次都会读取数据表信息
                $this->flush();
            }
        }
    }

    /**
     +----------------------------------------------------------
     * 获取字段信息并缓存
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     */
    public function flush() {
        // 缓存不存在则查询数据表信息
        $fields =   $this->db->getFields($this->getTableName());
        $this->fields   =   array_keys($fields);
        $this->fields['_autoinc'] = false;
        foreach ($fields as $key=>$val){
            // 记录字段类型
            $type[$key]    =   $val['type'];
            if($val['primary']) {
                $this->fields['_pk'] = $key;
                if($val['autoinc']) $this->fields['_autoinc']   =   true;
            }
        }
        // 记录字段类型信息
        if(C('DB_FIELDTYPE_CHECK'))   $this->fields['_type'] =  $type;

        // 2008-3-7 增加缓存开关控制
        if(C('DB_FIELDS_CACHE'))
            // 永久缓存数据表信息
            F('_fields/'.$this->name,$this->fields);
    }

    /**
     +----------------------------------------------------------
     * 动态切换扩展模型
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $type 模型类型名称
     * @param mixed $vars 要传入扩展模型的属性变量
     +----------------------------------------------------------
     * @return Model
     +----------------------------------------------------------
     */
    public function switchModel($type,$vars=array()) {
        $class = ucwords(strtolower($type)).'Model';
        if(!class_exists($class))
            throw_exception($class.L('_MODEL_NOT_EXIST_'));
        // 实例化扩展模型
        $this->_extModel   = new $class($this->name);
        if(!empty($vars)) {
            // 传入当前模型的属性到扩展模型
            foreach ($vars as $var)
                $this->_extModel->setProperty($var,$this->$var);
        }
        return $this->_extModel;
    }

    /**
     +----------------------------------------------------------
     * 设置数据对象的值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $name 名称
     * @param mixed $value 值
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     */
    public function __set($name,$value) {
        // 设置数据对象属性
        $this->data[$name]  =   $value;
    }

    /**
     +----------------------------------------------------------
     * 获取数据对象的值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $name 名称
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function __get($name) {
        return isset($this->data[$name])?$this->data[$name]:null;
    }

    /**
     +----------------------------------------------------------
     * 检测数据对象的值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $name 名称
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function __isset($name) {
        return isset($this->data[$name]);
    }

    /**
     +----------------------------------------------------------
     * 销毁数据对象的值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $name 名称
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     */
    public function __unset($name) {
        unset($this->data[$name]);
    }

    /**
     +----------------------------------------------------------
     * 利用__call方法实现一些特殊的Model方法
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $method 方法名称
     * @param array $args 调用参数
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function __call($method,$args) {
        if(in_array(strtolower($method),array('field','table','where','order','limit','page','having','group','lock','distinct'),true)) {
            // 连贯操作的实现
            $this->options[strtolower($method)] =   $args[0];
            return $this;
        }elseif(in_array(strtolower($method),array('count','sum','min','max','avg'),true)){
            // 统计查询的实现
            $field =  isset($args[0])?$args[0]:'*';
            return $this->getField(strtoupper($method).'('.$field.') AS tp_'.$method);
        }elseif(strtolower(substr($method,0,5))=='getby') {
            // 根据某个字段获取记录
            $field   =   parse_name(substr($method,5));
            $options['where'] =  $field.'=\''.$args[0].'\'';
            return $this->find($options);
        }else{
            throw_exception(__CLASS__.':'.$method.L('_METHOD_NOT_EXIST_'));
            return;
        }
    }
    // 回调方法 初始化模型
    protected function _initialize() {}

    /**
     +----------------------------------------------------------
     * 对保存到数据库的数据进行处理
     +----------------------------------------------------------
     * @access protected
     +----------------------------------------------------------
     * @param mixed $data 要操作的数据
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
     protected function _facade($data) {
        // 检查非数据字段
        if(!empty($this->fields)) {
            foreach ($data as $key=>$val){
                if(!in_array($key,$this->fields,true)){
                    unset($data[$key]);
                }elseif(C('DB_FIELDTYPE_CHECK') && is_scalar($val)) {
                    // 字段类型检查
                    $fieldType = strtolower($this->fields['_type'][$key]);
                    if(false !== strpos($fieldType,'int')) {
                        $data[$key]   =  intval($val);
                    }elseif(false !== strpos($fieldType,'float') || false !== strpos($fieldType,'double')){
                        $data[$key]   =  floatval($val);
                    }
                }
            }
        }
        $this->_before_write($data);
        return $data;
     }

    // 写入数据前的回调方法 包括新增和更新
    protected function _before_write(&$data) {}

    /**
     +----------------------------------------------------------
     * 新增数据
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $data 数据
     * @param array $options 表达式
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function add($data='',$options=array()) {
        if(empty($data)) {
            // 没有传递数据，获取当前数据对象的值
            if(!empty($this->data)) {
                $data    =   $this->data;
            }else{
                $this->error = L('_DATA_TYPE_INVALID_');
                return false;
            }
        }
        // 分析表达式
        $options =  $this->_parseOptions($options);
        // 数据处理
        $data = $this->_facade($data);
        if(false === $this->_before_insert($data,$options)) {
            return false;
        }
        // 写入数据到数据库
        $result = $this->db->insert($data,$options);
        if(false !== $result ) {
            $insertId   =   $this->getLastInsID();
            if($insertId) {
                // 自增主键返回插入ID
                $data[$this->getPk()]  = $insertId;
                $this->_after_insert($data,$options);
                return $insertId;
            }
        }
        return $result;
    }
    // 插入数据前的回调方法
    protected function _before_insert(&$data,$options) {}
    // 插入成功后的回调方法
    protected function _after_insert($data,$options) {}

    /**
     +----------------------------------------------------------
     * 通过Select方式添加记录
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $fields 要插入的数据表字段名
     * @param string $table 要插入的数据表名
     * @param array $options 表达式
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function selectAdd($fields='',$table='',$options=array()) {
        // 分析表达式
        $options =  $this->_parseOptions($options);
        // 写入数据到数据库
        if(false === $result = $this->db->selectInsert($fields?$fields:$options['field'],$table?$table:$this->getTableName(),$options)){
            // 数据库插入操作失败
            $this->error = L('_OPERATION_WRONG_');
            return false;
        }else {
            // 插入成功
            return $result;
        }
    }

    /**
     +----------------------------------------------------------
     * 保存数据
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $data 数据
     * @param array $options 表达式
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function save($data='',$options=array()) {
        if(empty($data)) {
            // 没有传递数据，获取当前数据对象的值
            if(!empty($this->data)) {
                $data    =   $this->data;
            }else{
                $this->error = L('_DATA_TYPE_INVALID_');
                return false;
            }
        }
        // 数据处理
        $data = $this->_facade($data);
        // 分析表达式
        $options =  $this->_parseOptions($options);
        if(false === $this->_before_update($data,$options)) {
            return false;
        }
        if(!isset($options['where']) ) {
            // 如果存在主键数据 则自动作为更新条件
            if(isset($data[$this->getPk()])) {
                $pk   =  $this->getPk();
                $options['where']  =  $pk.'=\''.$data[$pk].'\'';
                $pkValue = $data[$pk];
                unset($data[$pk]);
            }else{
                // 如果没有任何更新条件则不执行
                $this->error = L('_OPERATION_WRONG_');
                return false;
            }
        }
        $result = $this->db->update($data,$options);
        if(false !== $result) {
            if(isset($pkValue)) $data[$pk]   =  $pkValue;
            $this->_after_update($data,$options);
        }
        return $result;
    }
    // 更新数据前的回调方法
    protected function _before_update(&$data,$options) {}
    // 更新成功后的回调方法
    protected function _after_update($data,$options) {}

    /**
     +----------------------------------------------------------
     * 删除数据
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $options 表达式
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function delete($options=array()) {
        if(empty($options) && empty($this->options)) {
            // 如果删除条件为空 则删除当前数据对象所对应的记录
            if(!empty($this->data) && isset($this->data[$this->getPk()]))
                return $this->delete($this->data[$this->getPk()]);
            else
                return false;
        }
        if(is_numeric($options)  || is_string($options)) {
            // 根据主键删除记录
            $pk   =  $this->getPk();
            if(strpos($options,',')) {
                $where  =  $pk.' IN ('.$options.')';
            }else{
                $where  =  $pk.'=\''.$options.'\'';
                $pkValue = $options;
            }
            $options =  array();
            $options['where'] =  $where;
        }
        // 分析表达式
        $options =  $this->_parseOptions($options);
        $result=    $this->db->delete($options);
        if(false !== $result) {
            $data = array();
            if(isset($pkValue)) $data[$pk]   =  $pkValue;
            $this->_after_delete($data,$options);
        }
        // 返回删除记录个数
        return $result;
    }
    // 删除成功后的回调方法
    protected function _after_delete($data,$options) {}

    /**
     +----------------------------------------------------------
     * 查询数据集
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $options 表达式参数
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function select($options=array()) {
        if(is_string($options) || is_numeric($options)) {
            // 根据主键查询
            $where   =  $this->getPk().' IN ('.$options.')';
            $options =  array();
            $options['where'] =  $where;
        }
        // 分析表达式
        $options =  $this->_parseOptions($options);
        $resultSet = $this->db->select($options);
        if(false === $resultSet) {
            return false;
        }
        if(empty($resultSet)) { // 查询结果为空
            return null;
        }
        $this->_after_select($resultSet,$options);
        return $resultSet;
    }
    // 查询成功后的回调方法
    protected function _after_select(&$resultSet,$options) {}

    public function findAll($options=array()) {
        return $this->select($options);
    }

    /**
     +----------------------------------------------------------
     * 分析表达式
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param array $options 表达式参数
     +----------------------------------------------------------
     * @return array
     +----------------------------------------------------------
     */
    private function _parseOptions($options) {
        if(is_array($options))
            $options =  array_merge($this->options,$options);
        // 查询过后清空sql表达式组装 避免影响下次查询
        $this->options  =   array();
        if(!isset($options['table']))
            // 自动获取表名
            $options['table'] =$this->getTableName();
        // 字段类型验证
        if(C('DB_FIELDTYPE_CHECK')) {
            if(isset($options['where']) && is_array($options['where'])) {
                // 对数组查询条件进行字段类型检查
                foreach ($options['where'] as $key=>$val){
                    if(in_array($key,$this->fields,true) && is_scalar($val)){
                        $fieldType = strtolower($this->fields['_type'][$key]);
                        if(false !== strpos($fieldType,'int')) {
                            $options['where'][$key]   =  intval($val);
                        }elseif(false !== strpos($fieldType,'float') || false !== strpos($fieldType,'double')){
                            $options['where'][$key]   =  floatval($val);
                        }
                    }
                }
            }
        }
        // 表达式过滤
        $this->_options_filter($options);
        return $options;
    }
    // 表达式过滤回调方法
    protected function _options_filter(&$options) {}

    /**
     +----------------------------------------------------------
     * 查询数据
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $options 表达式参数
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
     public function find($options=array()) {
         if(is_numeric($options) || is_string($options)) {
             $where  =  $this->getPk().'=\''.$options.'\'';
             $options = array();
             $options['where'] = $where;
         }
         // 总是查找一条记录
        $options['limit'] = 1;
        // 分析表达式
        $options =  $this->_parseOptions($options);
        $resultSet = $this->db->select($options);
        if(false === $resultSet) {
            return false;
        }
        if(empty($resultSet)) {// 查询结果为空
            return null;
        }
        $this->data = $resultSet[0];
        $this->_after_find($this->data,$options);
        return $this->data;
     }
     // 查询成功的回调方法
     protected function _after_find(&$result,$options) {}

    /**
     +----------------------------------------------------------
     * 设置记录的某个字段值
     * 支持使用数据库字段和方法
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string|array $field  字段名
     * @param string|array $value  字段值
     * @param mixed $condition  条件
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function setField($field,$value,$condition='') {
        if(empty($condition) && isset($this->options['where']))
            $condition   =  $this->options['where'];
        $options['where'] =  $condition;
        if(is_array($field)) {
            foreach ($field as $key=>$val)
                $data[$val]    = $value[$key];
        }else{
            $data[$field]   =  $value;
        }
        return $this->save($data,$options);
    }

    /**
     +----------------------------------------------------------
     * 字段值增长
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $field  字段名
     * @param mixed $condition  条件
     * @param integer $step  增长值
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function setInc($field,$condition='',$step=1) {
        return $this->setField($field,array('exp',$field.'+'.$step),$condition);
    }

    /**
     +----------------------------------------------------------
     * 字段值减少
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $field  字段名
     * @param mixed $condition  条件
     * @param integer $step  减少值
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function setDec($field,$condition='',$step=1) {
        return $this->setField($field,array('exp',$field.'-'.$step),$condition);
    }

    /**
     +----------------------------------------------------------
     * 获取一条记录的某个字段值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $field  字段名
     * @param mixed $condition  查询条件
     * @param string $spea  字段数据间隔符号
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function getField($field,$condition='',$sepa=' ') {
        if(empty($condition) && isset($this->options['where']))
            $condition   =  $this->options['where'];
        $options['where'] =  $condition;
        $options['field']    =  $field;
        $options =  $this->_parseOptions($options);
        if(strpos($field,',')) { // 多字段
            $resultSet = $this->db->select($options);
            if(!empty($resultSet)) {
                $field  =   explode(',',$field);
                $key =  array_shift($field);
                $cols   =   array();
                foreach ($resultSet as $result){
                    $name   = $result[$key];
                    $cols[$name] =  '';
                    foreach ($field as $val)
                        $cols[$name] .=  $result[$val].$sepa;
                    $cols[$name]  = substr($cols[$name],0,-strlen($sepa));
                }
                return $cols;
            }
        }else{   // 查找一条记录
            $options['limit'] = 1;
            $result = $this->db->select($options);
            if(!empty($result)) {
                return reset($result[0]);
            }
        }
        return null;
    }

    /**
     +----------------------------------------------------------
     * 创建数据对象 但不保存到数据库
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $data 创建数据
     * @param string $type 状态
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
     public function create($data='',$type='') {
        // 如果没有传值默认取POST数据
        if(empty($data)) {
        	filter_request($_POST);
            $data    =   $_POST;
        }elseif(is_object($data)){
            $data   =   get_object_vars($data);
        }elseif(!is_array($data)){
            $this->error = L('_DATA_TYPE_INVALID_');
            return false;
        }
        // 状态
        $type = $type?$type:(!empty($data[$this->getPk()])?self::MODEL_UPDATE:self::MODEL_INSERT);

        // 表单令牌验证
        if(C('TOKEN_ON') && !$this->autoCheckToken($data)) {
            $this->error = L('_TOKEN_ERROR_');
            return false;
        }
        // 数据自动验证
        if(!$this->autoValidation($data,$type)) return false;

        // 检查字段映射
        if(!empty($this->_map)) {
            foreach ($this->_map as $key=>$val){
                if(isset($data[$key])) {
                    $data[$val] =   $data[$key];
                    unset($data[$key]);
                }
            }
        }
        // 验证完成生成数据对象
        $vo   =  array();
        foreach ($this->fields as $key=>$name){
            if(substr($key,0,1)=='_') continue;
            $val = isset($data[$name])?$data[$name]:null;
            //保证赋值有效
            if(!is_null($val)){
                $vo[$name] = (MAGIC_QUOTES_GPC && is_string($val))?   stripslashes($val)  :  $val;
            }
        }
        // 创建完成对数据进行自动处理
        $this->autoOperation($vo,$type);
        // 赋值当前数据对象
        $this->data =   $vo;
        // 返回创建的数据以供其他调用
        return $vo;
     }

    // 自动表单令牌验证
    public function autoCheckToken($data) {
        $name   = C('TOKEN_NAME');
        if(isset($_SESSION[$name])) {
            // 当前需要令牌验证
            if(empty($data[$name]) || $_SESSION[$name] != $data[$name]) {
                // 非法提交
                return false;
            }
            // 验证完成销毁session
            unset($_SESSION[$name]);
        }
        return true;
    }

    /**
     +----------------------------------------------------------
     * 使用正则验证数据
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $value  要验证的数据
     * @param string $rule 验证规则
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function regex($value,$rule) {
        $validate = array(
            'require'=> '/.+/',
            'email' => '/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/',
            'url' => '/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/',
            'currency' => '/^\d+(\.\d+)?$/',
            'number' => '/\d+$/',
            'zip' => '/^[1-9]\d{5}$/',
            'integer' => '/^[-\+]?\d+$/',
            'double' => '/^[-\+]?\d+(\.\d+)?$/',
            'english' => '/^[A-Za-z]+$/',
        );
        // 检查是否有内置的正则表达式
        if(isset($validate[strtolower($rule)]))
            $rule   =   $validate[strtolower($rule)];
        return preg_match($rule,$value)===1;
    }

    /**
     +----------------------------------------------------------
     * 自动表单处理
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $data 创建数据
     * @param string $type 创建类型
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    private function autoOperation(&$data,$type) {
        // 自动填充
        if(!empty($this->_auto)) {
            foreach ($this->_auto as $auto){
                // 填充因子定义格式
                // array('field','填充内容','填充条件','附加规则',[额外参数])
                if(empty($auto[2])) $auto[2] = self::MODEL_INSERT; // 默认为新增的时候自动填充
                if( $type == $auto[2] || $auto[2] == self::MODEL_BOTH) {
                    switch($auto[3]) {
                        case 'function':    //  使用函数进行填充 字段的值作为参数
                        case 'callback': // 使用回调方法
                            $args = isset($auto[4])?$auto[4]:array();
                            if(isset($data[$auto[0]])) {
                                array_unshift($args,$data[$auto[0]]);
                            }
                            if('function'==$auto[3]) {
                                $data[$auto[0]]  = call_user_func_array($auto[1], $args);
                            }else{
                                $data[$auto[0]]  =  call_user_func_array(array(&$this,$auto[1]), $args);
                            }
                            break;
                        case 'field':    // 用其它字段的值进行填充
                            $data[$auto[0]] = $data[$auto[1]];
                            break;
                        case 'string':
                        default: // 默认作为字符串填充
                            $data[$auto[0]] = $auto[1];
                    }
                    if(false === $data[$auto[0]] )   unset($data[$auto[0]]);
                }
            }
        }
        return $data;
    }

    /**
     +----------------------------------------------------------
     * 自动表单验证
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $data 创建数据
     * @param string $type 创建类型
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function autoValidation($data,$type) {
        // 属性验证
        if(!empty($this->_validate)) {
            // 如果设置了数据自动验证
            // 则进行数据验证
            // 重置验证错误信息
            foreach($this->_validate as $key=>$val) {
                // 验证因子定义格式
                // array(field,rule,message,condition,type,when,params)
                // 判断是否需要执行验证
                if(empty($val[5]) || $val[5]== self::MODEL_BOTH || $val[5]== $type ) {
                    if(0==strpos($val[2],'{%') && strpos($val[2],'}'))
                        // 支持提示信息的多语言 使用 {%语言定义} 方式
                        $val[2]  =  L(substr($val[2],2,-1));
                    $val[3]  =  isset($val[3])?$val[3]:self::EXISTS_VAILIDATE;
                    $val[4]  =  isset($val[4])?$val[4]:'regex';
                    // 判断验证条件
                    switch($val[3]) {
                        case self::MUST_VALIDATE:   // 必须验证 不管表单是否有设置该字段
                            if(false === $this->_validationField($data,$val)){
                                $this->error    =   $val[2];
                                return false;
                            }
                            break;
                        case self::VALUE_VAILIDATE:    // 值不为空的时候才验证
                            if('' != trim($data[$val[0]])){
                                if(false === $this->_validationField($data,$val)){
                                    $this->error    =   $val[2];
                                    return false;
                                }
                            }
                            break;
                        default:    // 默认表单存在该字段就验证
                            if(isset($data[$val[0]])){
                                if(false === $this->_validationField($data,$val)){
                                    $this->error    =   $val[2];
                                    return false;
                                }
                            }
                    }
                }
            }
        }
        return true;
    }

    /**
     +----------------------------------------------------------
     * 根据验证因子验证字段
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $data 创建数据
     * @param string $val 验证规则
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function _validationField($data,$val) {
        switch($val[4]) {
            case 'function':// 使用函数进行验证
            case 'callback':// 调用方法进行验证
                $args = isset($val[6])?$val[6]:array();
                array_unshift($args,$data[$val[0]]);
                if('function'==$val[4]) {
                    return call_user_func_array($val[1], $args);
                }else{
                    return call_user_func_array(array(&$this, $val[1]), $args);
                }
            case 'confirm': // 验证两个字段是否相同
                return $data[$val[0]] == $data[$val[1]];
            case 'in': // 验证是否在某个数组范围之内
                return in_array($data[$val[0]] ,$val[1]);
            case 'equal': // 验证是否等于某个值
                return $data[$val[0]] == $val[1];
            case 'unique': // 验证某个值是否唯一
                if(is_string($val[0]) && strpos($val[0],','))
                    $val[0]  =  explode(',',$val[0]);
                $map = array();
                if(is_array($val[0])) {
                    // 支持多个字段验证
                    foreach ($val[0] as $field)
                        $map[$field]   =  $data[$field];
                }else{
                    $map[$val[0]] = $data[$val[0]];
                }
                if($this->where($map)->find())
                    return false;
                break;
            case 'regex':
            default:    // 默认使用正则验证 可以使用验证类中定义的验证名称
                // 检查附加规则
                return $this->regex($data[$val[0]],$val[1]);
        }
        return true;
    }

    /**
     +----------------------------------------------------------
     * SQL查询
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $sql  SQL指令
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public function query($sql)
    {
        if(!empty($sql)) {
            if(strpos($sql,'__TABLE__'))
                $sql    =   str_replace('__TABLE__',$this->getTableName(),$sql);
            return $this->db->query($sql);
        }else{
            return false;
        }
    }

    /**
     +----------------------------------------------------------
     * 执行SQL语句
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $sql  SQL指令
     +----------------------------------------------------------
     * @return false | integer
     +----------------------------------------------------------
     */
    public function execute($sql)
    {
        if(!empty($sql)) {
            if(strpos($sql,'__TABLE__'))
                $sql    =   str_replace('__TABLE__',$this->getTableName(),$sql);
            return $this->db->execute($sql);
        }else {
            return false;
        }
    }

    /**
     +----------------------------------------------------------
     * 得到当前的数据对象名称
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getModelName()
    {
        if(empty($this->name))
            $this->name =   substr(get_class($this),0,-5);
        return $this->name;
    }

    /**
     +----------------------------------------------------------
     * 得到完整的数据表名
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getTableName()
    {
        if(empty($this->trueTableName)) {
            $tableName  = !empty($this->tablePrefix) ? $this->tablePrefix : '';
            if(!empty($this->tableName)) {
                $tableName .= $this->tableName;
            }else{
                $tableName .= parse_name($this->name);
            }
            $tableName .= !empty($this->tableSuffix) ? $this->tableSuffix : '';
            if(!empty($this->dbName))
                $tableName    =  $this->dbName.'.'.$tableName;
            $this->trueTableName    =   strtolower($tableName);
        }
        return $this->trueTableName;
    }

    /**
     +----------------------------------------------------------
     * 启动事务
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     */
    public function startTrans()
    {
        $this->commit();
        $this->db->startTrans();
        return ;
    }

    /**
     +----------------------------------------------------------
     * 提交事务
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function commit()
    {
        return $this->db->commit();
    }

    /**
     +----------------------------------------------------------
     * 事务回滚
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    public function rollback()
    {
        return $this->db->rollback();
    }

    /**
     +----------------------------------------------------------
     * 返回模型的错误信息
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getError(){
        return $this->error;
    }

    /**
     +----------------------------------------------------------
     * 返回数据库的错误信息
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getDbError() {
        return $this->db->getError();
    }

    /**
     +----------------------------------------------------------
     * 返回最后插入的ID
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getLastInsID() {
        return $this->db->lastInsID;
    }

    /**
     +----------------------------------------------------------
     * 返回最后执行的sql语句
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getLastSql() {
        return $this->db->getLastSql();
    }

    /**
     +----------------------------------------------------------
     * 获取主键名称
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getPk() {
        return isset($this->fields['_pk'])?$this->fields['_pk']:$this->pk;
    }

    /**
     +----------------------------------------------------------
     * 获取数据表字段信息
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return array
     +----------------------------------------------------------
     */
    public function getDbFields(){
        return $this->fields;
    }

    /**
     +----------------------------------------------------------
     * 设置数据对象值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $data 数据
     +----------------------------------------------------------
     * @return Model
     +----------------------------------------------------------
     */
    public function data($data){
        if(is_object($data)){
            $data   =   get_object_vars($data);
        }elseif(!is_array($data)){
            throw_exception(L('_DATA_TYPE_INVALID_'));
        }
        $this->data = $data;
        return $this;
    }

    /**
     +----------------------------------------------------------
     * 查询SQL组装 join
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $join
     +----------------------------------------------------------
     * @return Model
     +----------------------------------------------------------
     */
    public function join($join) {
        if(is_array($join))
            $this->options['join'] =  $join;
        else
            $this->options['join'][]  =   $join;
        return $this;
    }

    /**
     +----------------------------------------------------------
     * 设置模型的属性值
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $name 名称
     * @param mixed $value 值
     +----------------------------------------------------------
     * @return Model
     +----------------------------------------------------------
     */
    public function setProperty($name,$value) {
        if(property_exists($this,$name))
            $this->$name = $value;
        return $this;
    }
};
?>