<?php 

/**
 * 
 * This class performs cURL requests for eBay.  It has built in functionality to perform the login with only the username and password required.
 * @author Chris
 *
 */
class ebay_curl {
	
	/**
	 * 
	 * Username used for login function. <br /> Set with setUsername function.
	 * @var string
	 */
	private $username = '';
	
	/**
	 * 
	 * Password used for login function. <br /> Set with setPassword function.
	 * @var string
	 */
	private $password = '';
	
	/**
	 * 
	 * Filesystem path used to store the cookie used in the curl requests.
	 * @var string
	 */
	private $cookie_path;
	
	/**
	 * 
	 * eBay login url used for login function.
	 * @var string
	 */
	private $login_url;
	
	/**
	 * 
	 * Useragent string sent with curl request [default to Chrome on Windows 7]
	 * @var string
	 */
	private $user_agent;
	
	/**
	 * 
	 * Referer URL sent with curl request [default to eBay login URL]
	 * @var string
	 */
	private $referer;
	
	/**
	 * 
	 * Curl object used for all cUrl I/O in this class.
	 * @var curl
	 */
	private $curl;
	
	/**
	 * 
	 * Default Constructor: Initializes all default values and removes php time limit.
	 */
	public function __construct() {
		$this->cookie_path = '/var/www/ebay/test/ebay_mine/cookie';
		$this->login_url = "http://signin.ebay.com/aw-cgi/eBayISAPI.dll";
		$this->referer = "http://signin.ebay.com/aw-cgi/eBayISAPI.dll?SignIn";
		$this->user_agent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.100 Safari/534.30";  //Chrome on Windows 7
		
		set_time_limit( 0 );
	}
	
	/**
	 * 
	 * Sets the username to be used for the ebay login
	 * @param string $username Username to passonto the ebay login
	 * 
	 * @return string Current set username
	 */
	public function setUsername( $username ) {
		return $this->username = $username;
	}
	
	/**
	 * 
	 * Sets the password to be used for the ebay login function
	 * @param string $password Password to pass onto the ebay login
	 * 
	 * @return string Current set password
	 */
	public function setPassword( $password ) {
		return $this->password = $password;
	}
	
	/**
	 * 
	 * Sets the filesystem path of the cookie that's stored
	 * @param string $cookie_path filesystem path to store cookie
	 * 
	 * @return string Current set path
	 */
	public function setCookiePath( $cookie_path ) {
		return $this->cookie_path = $cookie_path;
	}
	
	/**
	 * 
	 * Uses getCurlResult function to login to eBay and create a cookie to use for further curl operations <br /> On successful login a "Page Not Responding" message will be displayed in the return HTML. <br /> On failure the login screen will be displayed again.
	 * @return string HTML output from the ebay login operation
	 */
	public function login() {	
		// 1-Get First Login Page http://signin.ebay.com/aw-cgi/eBayISAPI.dll?SignIn
		// This page will set some cookies and we will use them for Posting in Form data.

		$this->getCurlResult( $this->login_url );

		// 2- Post Login Data to Page http://signin.ebay.com/aw-cgi/eBayISAPI.dll

		$this->setReferer( "http://signin.ebay.com/aw-cgi/eBayISAPI.dll?SignIn" );
		return $this->getCurlResult( $this->login_url, 'co_partnerId=2&pUserId='. $this->username .'&siteid=0&pageType=-1&pa1=&i1=-1&bshowgif=0&UsingSSL=0&ru=&pp=&pa2=&errmsg=8&runame=&ruparams=&ruproduct=&sid=&onepagereg=&sessid=&favoritenav=&confirm=&ebxPageType=&existingEmail=&isCheckout=&k=0&migrateVisitor=&searchname=&attributestring=&fstype=&fromwl=&pass='. $this->password );
		
		//  return will actually display a page from ebay mentioning there is no navigation, start from the homepage if login works.
		//    You will see an incorrect login message if it's broken
	}

	/**
	 * 
	 * Sets the referer URL for cUrl calls.
	 * @param string $ref_url Referer URL
	 */
	public function setReferer( $ref_url ) {
		$this->referer = $ref_url;
	}
	
	/**
	 * 
	 * This function preforms the cURL call and returns the resulting HTML.
	 * @param string $url URL to request with cURL call
	 * @param string $post_fields post fields to be sent with cURL call [optional]
	 * 
	 * @return string HTML from cURL call
	 */
	public function getCurlResult( $url, $post_fields = null ) {
		$this->curl = curl_init();
		
		curl_setopt( $this->curl, CURLOPT_URL, $url );
		curl_setopt( $this->curl, CURLOPT_USERAGENT, $this->user_agent );
		curl_setopt( $this->curl, CURLOPT_RETURNTRANSFER, 1 );
		curl_setopt( $this->curl, CURLOPT_FOLLOWLOCATION, 1 );
		curl_setopt( $this->curl, CURLOPT_COOKIEFILE, $this->cookie_path );
		curl_setopt( $this->curl, CURLOPT_COOKIEJAR, $this->cookie_path );
		curl_setopt( $this->curl, CURLOPT_REFERER, $this->referer );
		
		if( !is_null( $post_fields ) ) {
			curl_setopt( $this->curl, CURLOPT_POST, 1);
			curl_setopt( $this->curl, CURLOPT_POSTFIELDS, $post_fields );
		}
		
		$result = curl_exec( $this->curl );
		curl_close( $this->curl );
		
		return $result;		
	}
}

?>