<?php
/*
 * This file is part of the `nicolab/php-ftp-client` package.
 *
 * (c) Nicolas Tallefourtane <dev@nicolab.net>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Nicolas Tallefourtane http://nicolab.net
 */
namespace FtpClient;

/**
 * Wrap the PHP FTP functions
 *
 * @method bool alloc(int $filesize, string &$result = null) Allocates space for a file to be uploaded
 * @method bool cdup() Changes to the parent directory
 * @method bool chdir(string $directory) Changes the current directory on a FTP server
 * @method int chmod(int $mode, string $filename) Set permissions on a file via FTP
 * @method bool close() Closes an FTP connection
 * @method bool delete(string $path) Deletes a file on the FTP server
 * @method bool exec(string $command) Requests execution of a command on the FTP server
 * @method bool fget(resource $handle, string $remote_file, int $mode, int $resumepos = 0) Downloads a file from the FTP server and saves to an open file
 * @method bool fput(string $remote_file, resource $handle, int $mode, int $startpos = 0) Uploads from an open file to the FTP server
 * @method mixed get_option(int $option) Retrieves various runtime behaviours of the current FTP stream
 * @method bool get(string $local_file, string $remote_file, int $mode, int $resumepos = 0) Downloads a file from the FTP server
 * @method bool login(string $username, string $password) Logs in to an FTP connection
 * @method int mdtm(string $remote_file) Returns the last modified time of the given file
 * @method string mkdir(string $directory) Creates a directory
 * @method array mlsd(string $remote_dir) Returns a list of files in the given directory
 * @method int nb_continue() Continues retrieving/sending a file (non-blocking)
 * @method int nb_fget(resource $handle, string $remote_file, int $mode, int $resumepos = 0) Retrieves a file from the FTP server and writes it to an open file (non-blocking)
 * @method int nb_fput(string $remote_file, resource $handle, int $mode, int $startpos = 0) Stores a file from an open file to the FTP server (non-blocking)
 * @method int nb_get(string $local_file, string $remote_file, int $mode, int $resumepos = 0) Retrieves a file from the FTP server and writes it to a local file (non-blocking)
 * @method int nb_put(string $remote_file, string $local_file, int $mode, int $startpos = 0) Stores a file on the FTP server (non-blocking)
 * @method array nlist(string $directory) Returns a list of file names in the given directory; remote_dir parameter may also include arguments
 * @method bool pasv(bool $pasv) Turns passive mode on or off
 * @method bool put(string $remote_file, string $local_file, int $mode, int $startpos = 0) Uploads a file to the FTP server
 * @method string pwd() Returns the current directory name
 * @method bool quit() Closes an FTP connection
 * @method array raw(string $command) Sends an arbitrary command to an FTP server
 * @method array rawlist(string $directory, bool $recursive = false) Returns a detailed list of files in the given directory
 * @method bool rename(string $oldname, string $newname) Renames a file or a directory on the FTP server
 * @method bool rmdir(string $directory) Removes a directory
 * @method bool set_option(int $option, mixed $value) Set miscellaneous runtime FTP options
 * @method bool site(string $command) Sends a SITE command to the server
 * @method int size(string $remote_file) Returns the size of the given file
 * @method string systype() Returns the system type identifier of the remote FTP server
 *
 * @author Nicolas Tallefourtane <dev@nicolab.net>
 */
class FtpWrapper
{
    /**
     * The connection with the server
     *
     * @var resource
     */
    protected $conn;

    /**
     * Constructor.
     *
     * @param resource &$connection The FTP (or SSL-FTP) connection (takes by reference).
     */
    public function __construct(&$connection)
    {
        $this->conn = &$connection;
    }

    /**
     * Forward the method call to FTP functions
     *
     * @param  string       $function
     * @param  array        $arguments
     * @return mixed
     * @throws FtpException When the function is not valid
     */
    public function __call($function, array $arguments)
    {
        $function = 'ftp_' . $function;

        if (function_exists($function)) {
            array_unshift($arguments, $this->conn);
            return @call_user_func_array($function, $arguments);
        }

        throw new FtpException("{$function} is not a valid FTP function");
    }

    /**
     * Opens a FTP connection
     *
     * @param  string   $host
     * @param  int      $port
     * @param  int      $timeout
     * @return resource
     */
    public function connect($host, $port = 21, $timeout = 90)
    {
        return @ftp_connect($host, $port, $timeout);
    }

    /**
     * Opens a Secure SSL-FTP connection
     * @param  string   $host
     * @param  int      $port
     * @param  int      $timeout
     * @return resource
     */
    public function ssl_connect($host, $port = 21, $timeout = 90)
    {
        return @ftp_ssl_connect($host, $port, $timeout);
    }
}
