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Created: Mon, Jun 30, 3:49 AM

spam_helper.php
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	<?php
	/**
	* @version $Id: spam_helper.php 12306 2009-08-17 02:35:55Z dmitrya $
	* @package In-Portal
	* @copyright Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
	* @license GNU/GPL
	* In-Portal is Open Source software.
	* This means that this software may have been modified pursuant
	* the GNU General Public License, and as distributed it includes
	* or is derivative of works licensed under the GNU General Public License
	* or other free or open source software licenses.
	* See http://www.in-portal.net/license/ for copyright notices and details.
	*/

	defined('FULL_PATH') or die('restricted access!');

	class SpamHelper extends kHelper {

	/**
	* Table name where spam control information is keeped
	*
	* @var string
	*/
	var $TableName;

	/**
	* RecourceId field of current item
	*
	* @var int
	*/
	var $ResourceId = 0;

	/**
	* Type of information to put into spam control
	*
	* @var string
	*/
	var $DataType = '';

	/**
	* Default spam control record expiration
	*
	* @var int
	*/
	var $Expiration = 0;

	function SpamHelper()
	{
	parent::kHelper();
	$this->TableName = TABLE_PREFIX.'SpamControl';
	}

	/**
	* Initializes helper for concrete item
	*
	* @param int $resource_id
	* @param string $data_type
	* @param int $expiration
	*/
	function InitHelper($resource_id, $data_type, $expiration)
	{
	$this->ResourceId = $resource_id;
	$this->DataType = $data_type;

	if (preg_match('/(.):(.)/', $expiration, $regs)) {
	$delay_value = $this->Application->ConfigValue($regs[1]);
	$delay_interval = $this->Application->ConfigValue($regs[2]);
	$expiration = $delay_value * $delay_interval;
	}

	$this->Expiration = adodb_mktime() + $expiration;
	}

	/**
	* Returns WHERE clause that identified each spam control record
	*
	* @param bool $as_array return result as array, not string
	*
	* @return string
	*/
	function GetKeyClause($as_array = false)
	{
	$user_id = $this->Application->RecallVar('user_id');

	if ($user_id == 0) {
	$user_id = -2;
	}

	$keys = Array (
	'ItemResourceId' => $this->ResourceId,
	'IPaddress' => $_SERVER['REMOTE_ADDR'],
	'PortalUserId' => $user_id,
	'DataType' => $this->DataType,
	);

	if ($as_array) {
	return $keys;
	}

	$ret = '';
	foreach ($keys as $field_name => $field_value) {
	$ret .= '('.$field_name.' = '.$this->Conn->qstr($field_value).') AND ';
	}

	return preg_replace('/(.*) AND $/', '\\1', $ret);
	}

	/**
	* Allows to add current item in spam control
	*
	*/
	function AddToSpamControl()
	{
	$fields_hash = $this->GetKeyClause(true);

	$fields_hash['Expire'] = $this->Expiration;
	$this->Conn->doInsert($fields_hash, $this->TableName);
	}

	/**
	* Allows to check if current item is in spam control
	*
	* @return bool
	*/
	function InSpamControl()
	{
	$key_clause = $this->GetKeyClause();

	$sql = 'SELECT Expire
	FROM '.$this->TableName.'
	WHERE '.$key_clause;
	$expires = $this->Conn->GetOne($sql);

	if ($expires && $expires < adodb_mktime()) {
	// spam control record is expired
	$sql = 'DELETE FROM '.$this->TableName.'
	WHERE '.$key_clause;
	$this->Conn->Query($sql);
	return false;
	}

	return $expires ? true : false;
	}
	}

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