<?php
namespace Admin\Model;
use Think\Model;
class CatFieldModel extends Model{
    //自动验证
    //array(验证字段,验证规则,错误提示,[验证条件,附加规则,验证时间])
    protected $_validate = array(
        array('formtype', 'require', '字段类型不能为空！'),
        array('field', 'require', '字段名称必须填写！'),
        array('field', 'isFieldUnique', '该字段名称已经存在！', 0, 'callback', 1),
        array('name', 'require', '字段别名必须填写！'),
        array('field', '/^[a-z_0-9]+$/i', '字段名只支持英文或数字！', 0, 'regex', 3),
    );
    /**
     * 验证字段名是否已经存在
     * @param type $fieldName
     * @return boolean false已经存在，true不存在
     */
    public function isFieldUnique($fieldName) {
        if (empty($fieldName)) {
            return true;
        }
        if ($this->where(array('field' => $fieldName))->count()){
            return false;
        }
        return true;
    }
    /**
     * 根据模型ID，返回表名
     * @param type $table_id
     * @param type $table_id
     * @return string
     */
    protected function getTbName($issystem = 1) {
        $table_name="cat";
        //完整表名获取 判断主表 还是副表
        $table_name = $issystem ? $table_name : $table_name . "_data";
        return $table_name;
    }    
    //增加
    public function data_add(){
        $data=$this->create();
        //数据表id
        $table_id = $data['table_id'];    
        $fieldtype = $data['fieldtype'];    
        //完整表名获取 判断主表 还是副表
        $table_name = $this->getTbName($data['issystem']);
        if (!$this->table_exists($table_name)) {
            $this->error = '数据表不存在！';
            return false;
        }    
        //检查字段是否存在
        if ($this->field_exists($table_name, $data['field'])) {
            $this->error = '该字段已经存在！';
            return false;
        }        
        
        //增加字段
        $field = array(
            'tablename' => C("DB_PREFIX") . $table_name,
            'fieldname' => $data['field'],
            'fieldlen' => $data['fieldlen'],
            'defaultvalue' => $data['defaultvalue'],
        );
        if ($this->addFieldSql($fieldtype, $field)) {
            //更新htmlcode
            $data['htmlcode']=$this->createFieldHtmlCode($data);
            //
            $fieldid = $this->add($data);
            if ($fieldid) {
                return $fieldid;
            } else {
                $this->error = '字段信息入库失败！';
                //回滚
                $this->execute("ALTER TABLE  `{$field['tablename']}` DROP  `{$field['fieldname']}`");
                return false;
            }
        } else {
            $this->error = '数据库字段添加失败！';
            return false;
        }
    }
    //修改
  public function data_editor(){
        $data=$this->create();
        if (!$data['field_id']) {
            $this->error = '缺少字段id！';
            return false;
        } else {
            $field_id = $field_id ? $field_id : (int) $data['field_id'];
        }
        //重置htmlcode
        $data['htmlcode']=htmlspecialchars_decode($data['htmlcode']);
        $data['htmlcode']=$this->createFieldHtmlCode($data);
        //原字段信息
        $info = $this->where(array("field_id" => $field_id))->find();
        if (empty($info)){
            $this->error = '该字段不存在！';
            return false;
        }
        //字段主表副表不能修改
        unset($data['issystem']);
        //字段类型
        if (empty($data['formtype'])) {
            $data['formtype'] = $info['formtype'];
        }
        //模型id
        $field_type = $data['fieldtype'];
        //完整表名获取 判断主表 还是副表
        $tablename = $this->getTbName($info['issystem']);
        if (!$this->table_exists($tablename)) {
            $this->error = '数据表不存在！';
            return false;
        }
        
        if (false !== $this->save($data)) {
            //如果字段名变更
            if ($data['field'] && $info['field']) {
                //检查字段是否存在，只有当字段名改变才检测
                if ($data['field'] != $info['field'] && $this->field_exists($tablename, $data['field'])) {
                    $this->error = '该字段已经存在！';
                    //回滚
                    $this->where(array("field_id" => $field_id))->save($info);
                    return false;
                }
                $field = array(
                    'tablename' => C("DB_PREFIX") . $tablename,
                    'newfilename' => $data['field'],
                    'oldfilename' => $info['field'],
                    'fieldlen' => $data['fieldlen'],
                    'defaultvalue' => $data['defaultvalue'],
                );
                if (false === $this->editFieldSql($field_type, $field)) {
                    $this->error = '数据库字段结构更改失败！';
                    //回滚
                    $this->where(array("field_id" => $field_id))->save($info);
                    return false;
                }
                //并更新catmodeltemp
                $model=M("model")->where(array("cat_is_enter"=>array("like","%".$data['field']."%")))->select();
                $ModelModel=new \Admin\Model\ModelModel();     
                foreach($model as $v){
                    $ModelModel->updateCatModelTemp($v["modelid"]);
                }
            }
        } else {
            $this->error = '数据库更新失败！';
            return false;
        }
        //
        
        //
        return $data;
    }
    //删除字段
    public function data_delete($field_id,$systemfield) {
        //原字段信息
        $info = $this->where(array("field_id" => $field_id))->find();
        if (empty($info)) {
            $this->error = '该字段不存在！';
            return false;
        }
        //模型id
        $table_id = $info['table_id'];
        //完整表名获取 判断主表 还是副表
        $tablename = $this->getTbName($info['issystem']);
        if (!$this->table_exists($tablename)) {
            $this->error = '数据表不存在！';
            return false;
        }
        //判断是否允许删除
        if (in_array($info['field'],$systemfield)){
            $this->error = '系统字段不允许被删除！';
            return false;
        }
        if ($this->deleteFieldSql($info['field'], C("DB_PREFIX") . $tablename)) {
            $this->where(array("field_id" => $field_id, "table_id" => $table_id))->delete();
            //根据table_id查询model表，并更新modeltemp
            $model=M("model")->where(array("table_id"=>$table_id))->select();
            $ModelModel=new \Admin\Model\ModelModel();
            foreach($model as $v){
                $ModelModel->updateModelTemp($v["modelid"]);
            }            
        } else {
            $this->error = '数据库表字段删除失败！';
            return false;
        }
        return true;

    }   
        /**
     * 根据字段类型，删除对应的字段到相应表里面
     * @param type $filename 字段名称
     * @param type $tablename 完整表名
     */
    protected function deleteFieldSql($filename, $tablename) {
        //不带表前缀的表名
        $noprefixTablename = str_replace(C("DB_PREFIX"), '', $tablename);
        if (empty($tablename) || empty($filename)) {
            $this->error = '表名或者字段名不能为空！';
            return false;
        }

        if (false === $this->table_exists($noprefixTablename)) {
            $this->error = '该表不存在！';
            return false;
        }
        $sql = "ALTER TABLE `{$tablename}` DROP `{$filename}`;";
        if (false === $this->execute($sql)) {
            $this->error = '字段删除失败！';
            return false;
        }
        return true;
    }
    /**
     * 根据字段类型，增加对应的字段到相应表里面
     * @param type $field_type 字段类型
     * @param type $field 相关配置
     * $field = array(
     *      'tablename' 表名(完整表名)
     *      'fieldname' 字段名
     *      'maxlength' 最大长度
     *      'minlength' 最小值
     *      'defaultvalue' 默认值
     *      'minnumber' 是否正整数 和整数 1为正整数，-1是为整数
     *      'decimaldigits' 小数位数
     * )
     */
    protected function addFieldSql($field_type, $field) {
        //表名
        $tablename = $field['tablename'];
        //字段名
        $fieldname = $field['fieldname'];
        //长度
        $fieldlen = $field['fieldlen'];
        switch ($field_type) {            
            case "varchar":
                if (!$fieldlen) {
                    $fieldlen = 255;
                }
                $fieldlen = min($fieldlen, 255);
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` VARCHAR( {$fieldlen} ) NULL DEFAULT ''";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "tinyint":
                if (!$fieldlen) {
                    $fieldlen = 3;
                }
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` TINYINT( {$fieldlen} ) UNSIGNED NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "smallint":
                $minnumber = intval($minnumber);
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` SMALLINT( {$fieldlen} ) UNSIGNED NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "mediumint":
                $minnumber = intval($minnumber);
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` INT ( {$fieldlen} ) UNSIGNED NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "int":
                $minnumber = intval($minnumber);
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` INT ( {$fieldlen} ) UNSIGNED NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "mediumtext":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` MEDIUMTEXT";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "text":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` TEXT";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "date":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` DATE DEFAULT ''";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "datetime":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "timestamp":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "double":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` DOUBLE NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "float":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` FLOAT( {$fieldlen} ) NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "bigint":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}` BIGINT( {$fieldlen} ) NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "longtext":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}`  LONGTEXT";
                if (false === $this->execute($sql)) {
                    $this->error = '数据库字段添加失败！';
                    return false;
                }
                break;
            case "char":
                $sql = "ALTER TABLE `{$tablename}` ADD `{$fieldname}`  CHAR( {$fieldlen} ) NOT NULL DEFAULT ''";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            default:
                return false;
                break;
        }
        return true;
    }    
    /**
     * 执行数据库表结构更改
     * @param type $field_type 字段类型
     * @param type $field 相关配置
     * $field = array(
     *      'tablename' 表名(完整表名)
     *      'newfilename' 新字段名
     *      'oldfilename' 原字段名
     *      'maxlength' 最大长度
     *      'minlength' 最小值
     *      'defaultvalue' 默认值
     *      'minnumber' 是否正整数 和整数 1为正整数，-1是为整数
     *      'decimaldigits' 小数位数
     * )
     */
    protected function editFieldSql($field_type, $field) {
        //表名
        $tablename = $field['tablename'];
        //原字段名
        $oldfilename = $field['oldfilename'];
        //新字段名
        $newfilename = $field['newfilename'] ? $field['newfilename'] : $oldfilename;
        //长度
        $fieldlen = $field['fieldlen'];
        if (empty($tablename) || empty($newfilename)) {
            $this->error = '表名或者字段名不能为空！';
            return false;
        }

        switch ($field_type) {
            case 'varchar':
                //最大值
                if (!$fieldlen) {
                    $fieldlen = 255;
                }
                $fieldlen = min($fieldlen, 255);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` VARCHAR( {$fieldlen} ) NOT NULL DEFAULT ''";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'tinyint':
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` TINYINT( {$fieldlen} ) UNSIGNED NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'smallint':
                $minnumber = intval($minnumber);
                $defaultvalue = intval($defaultvalue);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` SMALLINT ( {$fieldlen} ) UNSIGNED  NOT NULL DEFAULT '{$defaultvalue}' DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'mediumint':
                $minnumber = intval($minnumber);
                $defaultvalue = intval($defaultvalue);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` MEDIUMINT ( {$fieldlen} ) UNSIGNED  NOT NULL DEFAULT '{$defaultvalue}' DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'int':
                $minnumber = intval($minnumber);
                $defaultvalue = intval($defaultvalue);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` INT ( {$fieldlen} ) NOT NULL DEFAULT '{$defaultvalue}' DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'mediumtext':
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` MEDIUMTEXT";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'text':
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` TEXT";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'date':
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` DATE DEFAULT ''";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'datetime':
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case 'timestamp':
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "double":
                $defaultvalue = intval($defaultvalue);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` DOUBLE NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "float":
                $defaultvalue = intval($defaultvalue);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}` FLOAT(" . $minnumber . ") NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "bigint":
                $defaultvalue = intval($defaultvalue);
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}`  BIGINT NOT NULL DEFAULT 0";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "longtext":
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}`  LONGTEXT";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            case "char":
                $sql = "ALTER TABLE `{$tablename}` CHANGE `{$oldfilename}` `{$newfilename}`  CHAR(" . $minnumber . ") NOT NULL DEFAULT ''";
                if (false === $this->execute($sql)) {
                    $this->error = '字段结构更改失败！';
                    return false;
                }
                break;
            default:
                $this->error = "字段类型" . $field_type . "不存在相应信息！";
                return false;
                break;
        }
        return true;
    }    
    /*
     * 创建字段html代码
     */
    public function createFieldHtmlCode($data){
        $TableModel=new \Admin\Model\TableModel();    
        if($data['field_id']){
            $info=$this->find($data['field_id']);
            //当字段类型 and 宽度 and 高度 and 默认值 未改变的时候htmlcode等于提交过来的，否则执行重新生成动作
            if($data['htmlcode']&&$info['field']==$data['field']&&$info['name']==$data['name']&&$info['formtype']==$data['formtype']&&$info['formwidth']==$data['formwidth']&&$info['formheight']==$data['formheight']&&$info['defaultval']==$data['defaultval']&&$info['tips']==$data['tips']){
                $htmlcode=$data['htmlcode'];
            }else{
                $htmlcode=$TableModel->FieldHtmlCodeReplace($data);
            }
        }else{
             $htmlcode=$TableModel->FieldHtmlCodeReplace($data);
        }
        return $htmlcode;
    }
}