<?php

/*******************************************************************************
 *           
 *      Author:     Christopher Phelefu
 *      Email:      phelefu@phronesisweb.com	
 *      Website:    http://www.phronesisweb.com
 *
 *      Version:    1.0
 *      Copyright:  (c) 2009 - Christopher Phelefu - Phronesis Web Designs.
 *      			All rights reserved.
 *      License:    GNU/GPL
 *
 *		Description  This is the pay4featured class
 ******************************************************************************/

//disallowing direct access
(defined( '_JEXEC' ) || defined( '_VALID_MOS' )) or die( 'Direct Access to this location is not allowed.' );

//defining DS if not yet defined
defined( "DS" )	|| define( "DS",DIRECTORY_SEPARATOR);

class paypal_class {
	
   var $last_error;                 // holds the last error encountered
   
   var $ipn_log;                    // bool: log IPN results to text file?
   
   var $ipn_log_file;               // filename of the IPN log
   var $ipn_response;               // holds the IPN response from paypal   
   var $ipn_data = array();         // array contains the POST values for IPN
   
   var $fields = array();           // array holds the fields to submit to paypal

   
   function paypal_class() {
		$this->paypal_url = 'https://www.paypal.com/cgi-bin/webscr';
		$this->last_error = '';
		$this->ipn_log_file = '.ipn_results.log';
		$this->ipn_log = false; 
		$this->ipn_response = '';
		
		$this->add_field('rm','2');           // Return method = POST
		$this->add_field('cmd','_xclick'); 
		
		$this->add_field('tax', '0');
		$this->add_field('no_note', '1');
		$this->add_field('charset', 'iso-8859-1');
		$this->add_field('no_shipping', '1');
   }
   
   function add_field($field, $value) {
		$this->fields["$field"] = $value;
   }

   function submit_paypal_post($title, $text, $btn) {
	  echo "<h4>{$title}</h4>\n";
	  echo "<p>{$text}<br/><br/></p>";
	  echo '<form method="post" name="paypal_form" action="'.$this->paypal_url.'">'."\n";

	  foreach ($this->fields as $name => $value) {
		 echo '<input type="hidden" name="'.$name.'" value="'.$value.'"/>'."\n";
	  }
	  echo '<center><input type="submit" value="'.$btn.'"></center>'."\n";
	  echo "</form>\n";
	  
	 echo '	<script type="text/javascript">';
	 echo "	window.onload = document.forms['paypal_form'].submit();" ;
	 echo '	</script>	';
   }
   
   function sendIT($subj){
    echo  'Doing the ipn thing - validating the ipn';
		   
	$to = "cphelefu@yahoo.com";
	$subject = $subj;
	$body = "Hi,\n\nHow are you?";
	if (mail($to, $subject, $body)) {
 	 echo("<p>Message successfully sent!</p>");
	 } else {
  	echo("<p>Message delivery failed...</p>"); }
	
	}
   
   function validate_ipn() {
		
	  // parse the paypal URL
	  $url_parsed=parse_url($this->paypal_url);        
       $rr = "";
	  $post_string = '';
	  if ($_POST){
		foreach ($_POST as $field=>$value) { 
		   $this->ipn_data["$field"] = $value;
		   $post_string .= $field.'='.urlencode(stripslashes($value)).'&'; 
		}
	  }
	  
	  $post_string.="cmd=_notify-validate"; // append ipn command
        
	  // open the connection to paypal
	  $fp = fsockopen($url_parsed[host],"80",$err_num,$err_str,30); 
	  if(!$fp) {
		 	$this->last_error = "fsockopen error no. $errnum: $errstr";
		 	$this->log_ipn_results(false);       
		 	return false;
		 } 
		 else { 
		 // Post the data back to paypal
		 fputs($fp, "POST $url_parsed[path] HTTP/1.1\r\n"); 
		 fputs($fp, "Host: $url_parsed[host]\r\n"); 
		 fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n"); 
		 fputs($fp, "Content-length: ".strlen($post_string)."\r\n"); 
		 fputs($fp, "Connection: close\r\n\r\n"); 
		 fputs($fp, $post_string . "\r\n\r\n"); 

		 // loop through the response from the server and append to variable
		 while(!feof($fp)) { 
			$this->ipn_response .= fgets($fp, 1024); 
		 } 

		 fclose($fp); // close connection
	  }
	  
	  if (eregi("VERIFIED",$this->ipn_response)) {
  
		 // Valid IPN transaction.
		 $this->log_ipn_results(true);
		 return true;       
	  } else {
  
		 // Invalid IPN transaction.  Check the log for details.
		 $this->last_error = 'IPN Validation Failed.';
		 $this->log_ipn_results(false);  
		 return false; 
	  }
   }
   
   function log_ipn_results($success) {
	   
	  if (!$this->ipn_log) return;  // is logging turned off?
	  
	  // Timestamp
	  $text = '['.date('m/d/Y g:i A').'] - '; 
	  
	  // Success or failure being logged?
	  if ($success) $text .= "SUCCESS!\n";
	  else $text .= 'FAIL: '.$this->last_error."\n";
	  
	  // Log the POST variables
	  $text .= "IPN POST Vars from Paypal:\n";
	  foreach ($this->ipn_data as $key=>$value) {
		 $text .= "$key=$value, ";
	  }
 
	  // Log the response from the paypal server
	  $text .= "\nIPN Response from Paypal Server:\n ".$this->ipn_response;
	  
	  // Write to log
	  $fp=fopen($this->ipn_log_file,'a');
	  fwrite($fp, $text . "\n\n"); 

	  fclose($fp);  // close file
   }

   function dump_fields() {
 
	  echo "<h3>paypal_class->dump_fields() Output:</h3>";
	  echo "<table width=\"95%\" border=\"1\" cellpadding=\"2\" cellspacing=\"0\">
			<tr>
			   <td bgcolor=\"black\"><b><font color=\"white\">Field Name</font></b></td>
			   <td bgcolor=\"black\"><b><font color=\"white\">Value</font></b></td>
			</tr>"; 
	  
	  ksort($this->fields);
	  foreach ($this->fields as $key => $value) {
		 echo "<tr><td>$key</td><td>".urldecode($value)."&nbsp;</td></tr>";
	  }
 
	  echo "</table><br>"; 
   }
}
?>