<?php
namespace FileTransfer;

abstract class ConnectionProtocol
{

    /*User login, String*/
    protected $user;

    /*User pass, String*/
    protected $pass;

    /*Hostname, String*/
    protected $host;

    /*SSH port, String or Number*/
    protected $port;

    /*current HostPath, String*/
    protected $connectionPath;

    /*current localPath, String*/
    protected $localPath;

    /*Connection, resource */
    protected $connection;

    /*CallsStack, Array */
    protected $log;

    /*LastResponse*/
    protected $response;

    protected $lastError;

    public function __construct( $user , $pwd, $host , $port, $localpath = __DIR__)
    {
        $this->user = $user;
        $this->pass = $pwd;
        $this->host = $host;
        $this->port = $port;
        $this->localPath = $localpath;
        $this->create();
    }

    abstract protected function create();

    public function __destruct( )
    {
        $this->close();
    }
    public function __toString()
    {
        return "<pre>".print_r($this->log, true)."</pre>";
    }

    public function setLocalDir($path)
    {
        if ( file_exists($path) && is_dir($path))
        {
            $this->localPath = $path;
            return true;
        }
        else
        {
            $this->setError("Dir not exist");
            return false;
        }
    }

    public function lastError()
    {
        return $this->lastError;
    }

    protected function setError($error)
    {
        $this->lastError = $error;
    }

    protected function addLog($str)
    {
       $this->log[] = $str;
    }

    protected function pathBuilder($path)
    {
        if(stripos('/', $path) === 0) return $path;
        else return $this->connectionPath.'/'.$path ;
    }

}

interface transport{
    public function create();
    public function close();
    public function cd($args);
    public function download($args);
    public function upload($args);
    public function exec($args);
}