Index: units/helpers/spam_helper.php
===================================================================
--- units/helpers/spam_helper.php	(revision 14768)
+++ units/helpers/spam_helper.php	(working copy)
@@ -17,47 +17,58 @@
 	class SpamHelper extends kHelper {
 
 		/**
-		 * Table name where spam control information is keeped
+		 * Table name where spam control information is kept
 		 *
 		 * @var string
+		 * @access protected
 		 */
-		var $TableName;
+		protected $TableName;
 
 		/**
-		 * RecourceId field of current item
+		 * ResourceId field of current item
 		 *
 		 * @var int
+		 * @access protected
 		 */
-		var $ResourceId = 0;
+		protected $ResourceId = 0;
 
 		/**
 		 * ResourceId from all items in list
 		 *
 		 * @var Array
+		 * @access protected
 		 */
-		var $ListResourceIDs = Array ();
+		protected $ListResourceIDs = Array ();
 
 		/**
 		 * Type of information to put into spam control
 		 *
 		 * @var string
+		 * @access protected
 		 */
-		var $DataType = '';
+		protected $DataType = '';
 
 		/**
 		 * Default spam control record expiration
 		 *
 		 * @var int
+		 * @access protected
 		 */
-		var $Expiration = 0;
+		protected $Expiration = 0;
 
-		var $ExpirationCache = Array ();
+		/**
+		 * Items expiration cache (for faster access)
+		 *
+		 * @var array
+		 * @access protected
+		 */
+		protected $ExpirationCache = Array ();
 
 		public function __construct()
 		{
 			parent::__construct();
 
-			$this->TableName = TABLE_PREFIX.'SpamControl';
+			$this->TableName = TABLE_PREFIX . 'SpamControl';
 		}
 
 		/**
@@ -67,14 +78,15 @@
 		 * @param string $data_type
 		 * @param int $expiration
 		 * @param Array $list_resource_ids
+		 * @access public
 		 */
-		function InitHelper($resource_id, $data_type, $expiration, $list_resource_ids = Array ())
+		public function InitHelper($resource_id, $data_type, $expiration, $list_resource_ids = Array ())
 		{
 			$this->DataType = $data_type;
 			$this->ResourceId = $resource_id;
 			$this->ListResourceIDs = $list_resource_ids ? $list_resource_ids : Array ($resource_id);
 
-			if (preg_match('/(.*):(.*)/', $expiration, $regs)) {
+			if ( preg_match('/(.*):(.*)/', $expiration, $regs) ) {
 				$delay_value = $this->Application->ConfigValue($regs[1]);
 				$delay_interval = $this->Application->ConfigValue($regs[2]);
 				$expiration = $delay_value * $delay_interval;
@@ -89,22 +101,23 @@
 		 * @param bool $as_array return result as array, not string
 		 *
 		 * @return string
+		 * @access protected
 		 */
-		function GetKeyClause($as_array = false)
+		protected function GetKeyClause($as_array = false)
 		{
 			$user_id = $this->Application->RecallVar('user_id');
 
-			if ($user_id == 0) {
+			if ( $user_id == 0 ) {
 				$user_id = USER_GUEST;
 			}
 
 			$keys = Array (
-				'IPaddress'			=>	$_SERVER['REMOTE_ADDR'],
-				'PortalUserId'		=>	$user_id,
-				'DataType'			=>	$this->DataType,
+				'IPaddress' => $_SERVER['REMOTE_ADDR'],
+				'PortalUserId' => $user_id,
+				'DataType' => $this->DataType,
 			);
 
-			if ($as_array) {
+			if ( $as_array ) {
 				$keys['ItemResourceId'] = $this->ResourceId;
 
 				return $keys;
@@ -123,32 +136,38 @@
 		/**
 		 * Allows to add current item in spam control
 		 *
+		 * @return void
+		 * @access public
 		 */
-		function AddToSpamControl()
+		public function AddToSpamControl()
 		{
 			$fields_hash = $this->GetKeyClause(true);
 
 			$fields_hash['Expire'] = $this->Expiration;
 			$this->Conn->doInsert($fields_hash, $this->TableName);
 
-			if (!array_key_exists($this->DataType, $this->ExpirationCache)) {
-				$this->ExpirationCache[$this->DataType][$this->ResourceId] = $this->Expiration;
+			// create empty expiration cache for given data type in case, when InSpamControl method wasn't called
+			if ( !isset($this->ExpirationCache[$this->DataType]) ) {
+				$this->ExpirationCache[$this->DataType] = Array ();
 			}
+
+			$this->ExpirationCache[$this->DataType][$this->ResourceId] = $this->Expiration;
 		}
 
 		/**
 		 * Allows to check if current item is in spam control
 		 *
 		 * @return bool
+		 * @access public
 		 */
-		function InSpamControl()
+		public function InSpamControl()
 		{
-			if (!array_key_exists($this->DataType, $this->ExpirationCache)) {
+			if ( !array_key_exists($this->DataType, $this->ExpirationCache) ) {
 				$key_clause = $this->GetKeyClause();
 
 				$sql = 'SELECT Expire, ItemResourceId
-						FROM '.$this->TableName.'
-						WHERE '.$key_clause;
+						FROM ' . $this->TableName . '
+						WHERE ' . $key_clause;
 				$this->ExpirationCache[$this->DataType] = $this->Conn->GetCol($sql, 'ItemResourceId');
 			}
 			else {
@@ -158,10 +177,10 @@
 			$cache =& $this->ExpirationCache[$this->DataType];
 			$expires = array_key_exists($this->ResourceId, $cache) ? $cache[$this->ResourceId] : false;
 
-			if ($expires && $expires < adodb_mktime()) {
+			if ( $expires && $expires < adodb_mktime() ) {
 				// spam control record is expired
-				$sql = 'DELETE FROM '.$this->TableName.'
-						WHERE '.$key_clause;
+				$sql = 'DELETE FROM ' . $this->TableName . '
+						WHERE ' . $key_clause;
 				$this->Conn->Query($sql);
 				return false;
 			}