<?php
require_once 'ZipInterface.php';
class PhpZipProxyException extends Exception
{ }
/**
 * Proxy class for the PHP Zip Extension
 * You need PHP 5.2 at least
 * You need Zip Extension or PclZip library
 * Encoding : ISO-8859-1
 *
 * @copyright  GPL License 2008 - Julien Pauli - Cyril PIERRE de GEYER - Anaska (http://www.anaska.com)
 * @license    http://www.gnu.org/copyleft/gpl.html  GPL License
 * @version 1.3
 */

class PhpZipProxy implements ZipInterface
{
	protected $zipArchive;
	protected $filename;
    /**
     * Class constructor
     *
     * @throws PhpZipProxyException
     */	
	public function __construct()
	{
		if (! class_exists('ZipArchive')) {
			throw new PhpZipProxyException('Zip extension not loaded - check your php settings, PHP5.2 minimum with zip extension
			 is required for using PhpZipProxy'); ;
		}
		$this->zipArchive = new ZipArchive();
	}
	/**
	 * Open a Zip archive
	 * 
	 * @param string $filename the name of the archive to open
	 * @return true if openning has succeeded
	 */		
	public function open($filename)
	{
		$this->filename = $filename;
		return $this->zipArchive->open($filename, ZIPARCHIVE::CREATE);
	}
	/**
	 * Retrieve the content of a file within the archive from its name
	 * 
	 * @param string $name the name of the file to extract
	 * @return the content of the file in a string
	 */	
	public function getFromName($name)
	{
		return $this->zipArchive->getFromName($name);
	}
	/**
	 * Add a file within the archive from a string
	 * 
	 * @param string $localname the local path to the file in the archive
	 * @param string $contents the content of the file
	 * @return true if the file has been successful added
	 */		
	public function addFromString($localname, $contents)
	{
		if (file_exists($this->filename) && !is_writable($this->filename)) {
			return false;
		}
		return $this->zipArchive->addFromString($localname, $contents);
	}
	/**
	 * Add a file within the archive from a file
	 * 
	 * @param string $filename the path to the file we want to add
	 * @param string $localname the local path to the file in the archive
	 * @return true if the file has been successful added
	 */
	public function addFile($filename, $localname = null)
	{
		if ((file_exists($this->filename) && !is_writable($this->filename))
			|| !file_exists($filename)) {
			return false;
		}
		return $this->zipArchive->addFile($filename, $localname);
	}
	/**
	 * Close the Zip archive
	 * @return true
	 */	
	public function close()
	{
		return $this->zipArchive->close();
	}
}
?>