<?php
namespace Admin\Model;
use Think\Model;
class SaveRemoteImgModel{
   //editor字段保存相关操作
    public function doIt($content){   
        preg_match_all ( "/\<[img|IMG].*?src=\"(.+?)\".*?>/", $content, $img_array );
        // 时间无限制
        set_time_limit ( 0 );
        foreach ( $img_array[0] as $key => $value ) {
            $matches=array(
                0=>$value,
                1=>$img_array[1][$key],
            );
            $newimgurl=$this->saveRemoteImg($matches);
            // 替换原来的图片地址
            $content = ereg_replace ( $img_array[1][$key], $newimgurl, $content );
        }
        return $content;  
    }
    //远程保存图片
    public function saveRemoteImg($matches){
        preg_match("/alt=\"(.*)\"/U", $matches[0],$result);
        $altName=$result[1]?$result[1]:time();
        //本地路径
        $this->TmpPath="./d/image/".date("Ymd")."/";
        if (! file_exists ($this->TmpPath)) {
            mkdir($this->TmpPath, 0777, true);
        }
        $result=$this->crabImage($matches[1], $this->TmpPath);
        if(!$result){
            return $matches[1];
        }
        //生成小图
        $image=new \Think\Image();
        $image->open($result[save_path]);
        $image->thumb(200,200);
        $small_path=$this->TmpPath."small_".$result[fileName];
        $image->save($small_path);
        if(!M("file")->where(array("md5"=>md5_file($result['save_path'])))->find()){
            M("file")->add(array(
                "pubid"=>$_POST["pubid"],
                "name"=>$altName,
                "ext"=>trim($result[ext],"."),
                "savename"=>$result[fileName],
                "smallpath"=>trim($small_path,"."),
                "size"=>filesize($result[save_path]),
                "md5"=>md5_file($result['save_path']),
                "sha1"=>sha1_file($result['save_path']),            
                "filepath"=>trim($result[save_path],"."),
                "create_time"=>time(),
            )); 
        }
        return trim($result[save_path],".");
    }
    /**
     * PHP将网页上的图片攫取到本地存储
     * @param $imgUrl  图片url地址
     * @param string $saveDir 本地存储路径 默认存储在当前路径
     * @param null $fileName 图片存储到本地的文件名
     * @return mix
     */
    function crabImage($imgUrl, $saveDir='./', $fileName=null){       
        if(empty($imgUrl)){
            return false;
        }        
        //获取图片信息大小
        $imgSize = getImageSize($imgUrl);
        if(!in_array($imgSize['mime'],array('image/jpg', 'image/gif', 'image/png', 'image/jpeg'),true)){
            return false;
        }
        //获取后缀名
        $_mime = explode('/', $imgSize['mime']);
        $_ext = '.'.end($_mime);
        if(empty($fileName)){  //生成唯一的文件名
            $fileName = uniqid(time(),true).$_ext;
        }        
        //开始攫取
        ob_start();
        readfile($imgUrl);
        $imgInfo = ob_get_contents();
        ob_end_clean();
        if(!file_exists($saveDir)){
            mkdir($saveDir,0777,true);
        }
        $fp = fopen($saveDir.$fileName, 'a');
        $imgLen = strlen($imgInfo);    //计算图片源码大小
        $_inx = 1024;   //每次写入1k
        $_time = ceil($imgLen/$_inx);
        for($i=0; $i<$_time; $i++){
            fwrite($fp,substr($imgInfo, $i*$_inx, $_inx));
        }
        fclose($fp);
        return array(
            "fileName"=>$fileName,
            'ext'=>$_ext,
            'save_path'=>$saveDir.$fileName
        );
    }  
}