<?php


namespace app\lib;

use think\Exception;
use think\facade\Log;

class SFTPConnection
{
    private $connection;
    private $sftp;

    public function __construct($host, $port=22)
    {
        $this->connection = @ssh2_connect($host, $port);
        if (! $this->connection)
            throw new Exception("Could not connect to $host on port $port.");
    }

    public function login($user_name, $password)
    {
        if (! @ssh2_auth_password($this->connection, $user_name, $password))
            throw new Exception("Could not authenticate with user_name $user_name " .
                "and password $password.");

        $this->sftp = @ssh2_sftp($this->connection);
        if (! $this->sftp)
            throw new Exception("Could not initialize SFTP subsystem.");
    }

    public function fileIsExists($remote_file)
    {
        $sftp = $this->sftp;
        $resource = "ssh2.sftp://{$sftp}" . $remote_file;
        return file_exists($resource);
    }

    public function getFile( $remote_file){
        $sftp = $this->sftp;
        $resource = "ssh2.sftp://{$sftp}" . $remote_file;
        return file_get_contents($resource);
   }
    public function uploadFile($local_file, $path, $remote_file)
    {
        $sftp = $this->sftp;
//        $findChar = '/';
//
//        $pos1 = strripos($remote_file, $findChar);
//        $path =substr($remote_file, 0, $pos1);
        //$is_exist = $sftp->dir_exits($path);//判断文件夹是否存在
        //$path = '/cebbank/llz/send/20230326';
        //if ($is_exist === false) {
        //ssh2_sftp_mkdir($sftp, '/home/user_name/newdir');
        /* Or:  mkdir("ssh2.sftp://$sftp/home/user_name/newdir"); */
        if (!is_dir("ssh2.sftp://".intval($sftp) . $path)) {
            ssh2_sftp_mkdir($sftp, $path,0777,true);
        }//不存在则创建

        $stream = @fopen("ssh2.sftp://".intval($sftp) . $remote_file, 'wr');

        if (! $stream)
            throw new Exception("Could not open file: $remote_file");

        $data_to_send = @file_get_contents($local_file);
        if ($data_to_send === false)
            throw new Exception("Could not open local file: $local_file.");

        if (@fwrite($stream, $data_to_send) === false)
            throw new Exception("Could not send data from file: $local_file.");

        @fclose($stream);
    }

    public function __destruct()
    {
        $this->connection = null;
//        try{
//            @ssh2_exec($this->connection, 'exit');
//        }catch(Exception $e) {
//            Log::warning($e->getMessage());
//        }

    }

}