<?php

namespace app\libs;

class downLoadZip
{
    public function downLoadFiles()
    {
        $exportPath = './qrcode';
        $filename = $exportPath . '.zip';
        $zip = new \ZipArchive();
        //引數1:zip儲存路徑，引數2：ZIPARCHIVE::CREATE沒有即是建立
        if (!$zip->open($filename, \ZIPARCHIVE::CREATE)) {
            echo "建立[exportPath.zip]失敗<br/>";
            return;
        }
        //echo "建立[$exportPath.zip]成功<br/>";
        $this->createZip(opendir($exportPath), $zip, $exportPath);
        $zip->close();

        header("Cache-Control: public");
        header("Content-Description: File Transfer");
        header('Content-disposition: attachment; filename=' . basename($filename)); //檔名
        header("Content-Type: application/zip"); //zip格式的
        header("Content-Transfer-Encoding: binary"); //告訴瀏覽器，這是二進位制檔案
        header('Content-Length: ' . filesize($filename)); //告訴瀏覽器，檔案大小

        $this->deldir('./qrcode');
        @readfile($filename);
        unlink('qrcode.zip'); //刪除伺服器壓縮檔案,釋放伺服器資源
    }


    function createZip($openFile, $zipObj, $sourceAbso, $newRelat = '')
    {
        while (($file = readdir($openFile)) != false) {
            if ($file == "." || $file == "..")
                continue;

            /*源目錄路徑(絕對路徑)*/
            $sourceTemp = $sourceAbso . '/' . $file;
            /*目標目錄路徑(相對路徑)*/
            $newTemp = $newRelat == '' ? $file : $newRelat . '/' . $file;
            if (is_dir($sourceTemp)) {
                //echo '建立'.$newTemp.'資料夾<br/>';
                $zipObj->addEmptyDir($newTemp);/*這裡注意：php只需傳遞一個資料夾名稱路徑即可*/
                $this->createZip(opendir($sourceTemp), $zipObj, $sourceTemp, $newTemp);
            }
            if (is_file($sourceTemp)) {
                //echo '建立'.$newTemp.'檔案<br/>';
                $zipObj->addFile($sourceTemp, $newTemp);
            }
        }
    }

    public function deldir($dir)
    {
        //先刪除目錄下的檔案：
        $dh = opendir($dir);
        while ($file = readdir($dh)) {
            if ($file != "." && $file != "..") {
                $fullpath = $dir . "/" . $file;
                if (!is_dir($fullpath)) {
                    unlink($fullpath);
                } else {
                    $this->deldir($fullpath);
                }
            }
        }
    }
}