<?php
namespace Westdc\Dataimport;

class File{

	private $config;

	function __construct($db = NULL)
	{
		$this->config = \Zend_Registry::get('config');
	}

	/**
	 * 獲取文件存儲目錄
	 * @return string
	 */
	private function getSavePath()
	{
		if(!preg_match("/(\\/|\\\)$/",$this->config->dataimport->path))
			return $this->config->dataimport->path . DIRECTORY_SEPARATOR;
		else
			return $this->config->dataimport->path;
	}

	/**
	 * 上傳文件
	 * @param $file
	 * @return array
	 */
	public function upload($file)
	{
		try{
			if (empty($file) !== false) {
				return array("error"=>"请选择要上传的文件");
			}
			
			if (@is_uploaded_file($file['tmp_name']) === false) {
				return array("error"=>"文件上传失败，请重新上传");
			}
			
			if($file['size'] > 20 * 1024 * 1024)
			{
				return array('error'=>"文件大小超出限制");
			}
			
			$ext = $this->getFileTextExt($file['name']);
			$filename = $file['name']."_".$this->gen_uuid().".".$ext;
			
			$new_filepath = $this->getSavePath().$filename;
			
			if (move_uploaded_file($file['tmp_name'], $new_filepath) === false) {
				return array("error"=>"上传失败，请重试");
			}
			
			return array(
				"success" => 1,
				"file"=>$filename
			);
		
		}catch(Exception $e)
		{
			return array("error"=>$e->getMessage());
		}
	}//upload()

	/**
	 * 获取文件扩展名
	 * @param $file_name
	 * @return mixed|string
	 */
	public function getFileTextExt($file_name)
	{
		$temp_arr = explode(".", $file_name);
		$file_ext = array_pop($temp_arr);
		$file_ext = trim($file_ext);
		$file_ext = strtolower($file_ext);
		return $file_ext;
	}

	/**
	 * 獲取文件Mime
	 * @param $file_name
	 * @return mixed
	 */
	public function getFileMime($file_name)
	{
		$finfo = finfo_open(FILEINFO_MIME_TYPE);
		$filetype =  finfo_file($finfo, $file_name) ; //文件mime类型
		finfo_close($finfo);
		return $filetype;
	}

	/**
	 * 生成文件名UUID
	 * @return string
	 */
	public function gen_uuid() {
		return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
			// 32 bits for "time_low"
			mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
	
			// 16 bits for "time_mid"
			mt_rand( 0, 0xffff ),
	
			// 16 bits for "time_hi_and_version",
			// four most significant bits holds version number 4
			mt_rand( 0, 0x0fff ) | 0x4000,
	
			// 16 bits, 8 bits for "clk_seq_hi_res",
			// 8 bits for "clk_seq_low",
			// two most significant bits holds zero and one for variant DCE1.1
			mt_rand( 0, 0x3fff ) | 0x8000,
	
			// 48 bits for "node"
			mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
		);
	}

	/**
	 * 獲得已經上傳的文件
	 * @return array
	 */
	public function getUploadFiles()
	{
		return $this->fetchDir($this->getSavePath());
	}

	/**
	 * 掃描文件夾
	 * @param $directory
	 * @return array
	 */
	public function fetchDir($directory){
		$mydir = dir($directory);

		$files = [];

		while($file = $mydir->read())
		{
			if($file == '.' || $file == "..")
				continue;

			if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!=".."))
			{
				$files = array_merge($files,$this->fetchDir("$directory/$file"));
			}
			else
				$files[] = $file;
		}

		$mydir->close();

		return $files;
	}

	/**
	 * 刪除文件
	 * @param $file
	 * @return bool
	 */
	public function deleteFile($file)
	{
		if(empty($file))
			return false;

		return unlink($this->getSavePath() . $file);
	}

	/**
	 * 獲取文件真實路徑
	 * @param $file
	 * @return string
	 */
	public function getRealName($file)
	{
		return $this->getSavePath().$file;
	}

}