<?php


/**


 * Created by JetBrains PhpStorm.


 * User: taoqili


 * Date: 12-7-18


 * Time: 上午11: 32


 * UEditor编辑器通用上传类


 */


class Uploader


{


    private $fileField;            //文件域名


    private $file;                 //文件上传对象


    private $config;               //配置信息


    private $oriName;              //原始文件名


    private $fileName;             //新文件名


    private $fullName;             //完整文件名,即从当前配置目录开始的URL


    private $fileSize;             //文件大小


    private $fileType;             //文件类型


    private $stateInfo;            //上传状态信息,


    private $stateMap = array(    //上传状态映射表，国际化用户需考虑此处数据的国际化


        "SUCCESS" ,                //上传成功标记，在UEditor中内不可改变，否则flash判断会出错


        "文件大小超出 upload_max_filesize 限制" ,


        "文件大小超出 MAX_FILE_SIZE 限制" ,


        "文件未被完整上传" ,


        "没有文件被上传" ,


        "上传文件为空" ,


        "POST" => "文件大小超出 post_max_size 限制" ,


        "SIZE" => "文件大小超出网站限制" ,


        "TYPE" => "不允许的文件类型" ,


        "DIR" => "目录创建失败" ,


        "IO" => "输入输出错误" ,


        "UNKNOWN" => "未知错误" ,


        "MOVE" => "文件保存时出错",


        "DIR_ERROR" => "创建目录失败"


    );





    /**


     * 构造函数


     * @param string $fileField 表单名称


     * @param array $config  配置项


     * @param bool $base64  是否解析base64编码，可省略。若开启，则$fileField代表的是base64编码的字符串表单名


     */


    public function __construct( $fileField , $config , $base64 = false )


    {


        $this->fileField = $fileField;


        $this->config = $config;


        $this->stateInfo = $this->stateMap[ 0 ];


        $this->upFile( $base64 );


    }





    /**


     * 上传文件的主处理方法


     * @param $base64


     * @return mixed


     */


    private function upFile( $base64 )


    {


        //处理base64上传


        if ( "base64" == $base64 ) {


            $content = $_POST[ $this->fileField ];


            $this->base64ToImage( $content );


            return;


        }





        //处理普通上传


        $file = $this->file = $_FILES[ $this->fileField ];


        if ( !$file ) {


            $this->stateInfo = $this->getStateInfo( 'POST' );


            return;


        }


        if ( $this->file[ 'error' ] ) {


            $this->stateInfo = $this->getStateInfo( $file[ 'error' ] );


            return;


        }


        if ( !is_uploaded_file( $file[ 'tmp_name' ] ) ) {


            $this->stateInfo = $this->getStateInfo( "UNKNOWN" );


            return;


        }





        $this->oriName = $file[ 'name' ];


        $this->fileSize = $file[ 'size' ];


        $this->fileType = $this->getFileExt();





        if ( !$this->checkSize() ) {


            $this->stateInfo = $this->getStateInfo( "SIZE" );


            return;


        }


        if ( !$this->checkType() ) {


            $this->stateInfo = $this->getStateInfo( "TYPE" );


            return;


        }





        $folder = $this->getFolder();





        if ( $folder === false ) {


            $this->stateInfo = $this->getStateInfo( "DIR_ERROR" );


            return;


        }





        $this->fullName = $folder . '/' . $this->getName();





        if ( $this->stateInfo == $this->stateMap[ 0 ] ) {


            if ( !move_uploaded_file( $file[ "tmp_name" ] , $this->fullName ) ) {


                $this->stateInfo = $this->getStateInfo( "MOVE" );


            }


        }


    }





    /**


     * 处理base64编码的图片上传


     * @param $base64Data


     * @return mixed


     */


    private function base64ToImage( $base64Data )


    {


        $img = base64_decode( $base64Data );


        $this->fileName = time() . rand( 1 , 10000 ) . ".png";


        $this->fullName = $this->getFolder() . '/' . $this->fileName;


        if ( !file_put_contents( $this->fullName , $img ) ) {


            $this->stateInfo = $this->getStateInfo( "IO" );


            return;


        }


        $this->oriName = "";


        $this->fileSize = strlen( $img );


        $this->fileType = ".png";


    }





    /**


     * 获取当前上传成功文件的各项信息


     * @return array


     */


    public function getFileInfo()


    {


        return array(


            "originalName" => $this->oriName ,


            "name" => $this->fileName ,


            "url" => $this->fullName ,


            "size" => $this->fileSize ,


            "type" => $this->fileType ,


            "state" => $this->stateInfo


        );


    }





    /**


     * 上传错误检查


     * @param $errCode


     * @return string


     */


    private function getStateInfo( $errCode )


    {


        return !$this->stateMap[ $errCode ] ? $this->stateMap[ "UNKNOWN" ] : $this->stateMap[ $errCode ];


    }





    /**


     * 重命名文件


     * @return string


     */


    private function getName()


    {


        return $this->fileName = time() . rand( 1 , 10000 ) . $this->getFileExt();


    }





    /**


     * 文件类型检测


     * @return bool


     */


    private function checkType()


    {


        return in_array( $this->getFileExt() , $this->config[ "allowFiles" ] );


    }





    /**


     * 文件大小检测


     * @return bool


     */


    private function  checkSize()


    {


        return $this->fileSize <= ( $this->config[ "maxSize" ] * 1024 );


    }





    /**


     * 获取文件扩展名


     * @return string


     */


    private function getFileExt()


    {


        return strtolower( strrchr( $this->file[ "name" ] , '.' ) );


    }





    /**


     * 按照日期自动创建存储文件夹


     * @return string


     */


    private function getFolder()


    {


        $pathStr = $this->config[ "savePath" ];


        if ( strrchr( $pathStr , "/" ) != "/" ) {


            $pathStr .= "/";


        }


        $pathStr .= date( "Ymd" );


        if ( !file_exists( $pathStr ) ) {


            if ( !mkdir( $pathStr , 0777 , true ) ) {


                return false;


            }


        }


        return $pathStr;


    }


}