<?php
class ftpObj {
	private $ftpConn, $host, $hostPort, $user, $password, $proxyHost, $proxyPort;
	function __construct($host, $hostPort, $user, $password, $proxyHost = false, $proxyPort = false) {
		$this->host = $host;
		$this->hostPort = $hostPort;
		$this->user = $user;
		$this->password = $password;
		$this->proxyHost = $proxyHost;
		$this->proxyPort = $proxyPort;

		$this->connect();
	}

	function connect() {
		$connected = false;
		if ($this->proxyHost === false) {
			$this->ftpConn = ftp_connect($this->host,$this->hostPort);
			$connected = ftp_login($this->ftpConn, $this->user, $this->password);
		}
		else {
			$this->ftpConn = ftp_connect($this->proxyHost,$this->proxyPort);
			$connected = ftp_login($this->ftpConn, $this->user . '@' . $this->host . ':' . $this->hostPort, $this->password);
		}
		if (!$connected) die('failed to connect to FTP!');
		ftp_pasv($this->ftpConn, TRUE);
		ftp_set_option($this->ftpConn, FTP_TIMEOUT_SEC, 9999);
	}

	function download($file, $fromPath, $toPath, $resume = 0) {
		$resumeFrom = 0;
		if ($resume > 0) {
			$this->connect();
			$resumeFrom = filesize($toPath . $file);
		}
		if ($resumeFrom == 0 && filesize($toPath . $file) > -1) unlink($toPath . $file);
		if (ftp_get($this->ftpConn, $toPath . $file, $fromPath . $file, FTP_BINARY, $resumeFrom)) {
			echo "successfully downloaded $file\n";
		} else {
			echo "failed downloading $file, retrying\n";
			$resume++;
			if ($resume > 10) {
				echo "failed downloading $file too many times for retry\n";
			} else $this->download($file, $fromPath, $toPath, $resume);
		}
	}

	function upload($file, $fromPath, $toPath, $resume = 0) {
		$resumeFrom = 0;
		if ($resume > 0) {
			$this->connect();
			$resumeFrom = ftp_size($this->ftpConn, $toPath . $file);
		}
		if ($resumeFrom == 0 && ftp_size($this->ftpConn, $toPath . $file) > -1) ftp_delete($this->ftpConn, $toPath . $file);
		if (ftp_put($this->ftpConn, $toPath . $file, $fromPath . $file, FTP_BINARY, $resumeFrom)) {
			echo "successfully uploaded $file\n";
		} else {
			echo "failed uploading $file, retrying\n";
			$resume++;
			if ($resume > 10) {
				echo "failed uploading $file too many times for retry\n";
			} else $this->upload($file, $fromPath, $toPath, $resume);
		}
	}

	function uncompress($path, $file) {
		$fh = gzopen($path . $file, 'rb');
		$outFh = fopen(str_replace('.gz', '', $path . $file), 'wb');
		if (!$fh) die("failed to create file: $file");
		while(!gzeof($fh)) fwrite($outFh, gzread($fh, 8192));
		fclose($outFh);
		gzclose($fh);
		unlink($path . $file);
		echo "successfully uncompressed $file\n";
	}
}