<?php
/**
 * This file contains the iwp_transfer class for use in IWP.
 *
 * @version $Id$
 * 
 *
 * @package IWP
 * @subpackage IWP_API
 */

/**
 * Extended InterspireTransfer Class
 * This class extends the InterspireTransfer class to include auto detection for the transfer method setting in IWP.
 *
 * @package IWP
 * @property iwp_transfer
 * @subpackage IWP_API
 */

class iwp_transfer extends InterspireTransfer {

	/**
	 * Instance
	 * This static variable holds the current instance of this object being loaded.
	 * So using the getInstance function anywhere will return the very same instance.
	 *
	 * @var object Instance
	 */
	public static $Instance;

	/**
	 * getInstance
	 * This is a static function that sets up the class instance and stores it to the static variable. It will then return that instantiation in the future.
	 *
	 * @return iwp_transfer Returns the instantiated object
	 **/
	public static function getInstance(){
		if(!isset(self::$Instance)){
			self::$Instance = new self();
		}
		return self::$Instance;
	}

	/**
	 * The Constructor
	 * This checks the application's config to see if they have explicitly set a method for transfering data
	 *
	 * @return iwp_transfer
	 */
	public function __construct(){
		$method = iwp_config::Get('curlorfopen');
		if($method == 'curl') {
			$this->UseCurl();
		}elseif($method == 'fopen') {
			$this->UseFopen();
		}
	}

}