una/inc/classes/BxDolCmtsQuery.php

<?php defined('BX_DOL') or die('hack attempt');
/**
 * Copyright (c) UNA, Inc - https://una.io
 * MIT License - https://opensource.org/licenses/MIT
 *
 * @defgroup    UnaCore UNA Core
 * @{
 */

/**
 * @see BxDolCmts
 */
class BxDolCmtsQuery extends BxDolDb
{
    protected $_oMain;

    protected $_sTable;
    protected $_sTriggerTable;
    protected $_sTriggerFieldId;
    protected $_sTriggerFieldAuthor;
    protected $_sTriggerFieldTitle;
    protected $_sTriggerFieldComments;

    protected $_sTableFiles;
    protected $_sTableFiles2Entries;

    protected $_sTableIds;

    public function __construct(&$oMain)
    {
        $this->_sTableIds = BxDolCmts::$sTableIds;

        $this->_oMain = $oMain;

        $this->_sTableFiles = $this->_oMain->getTableNameImages();
        $this->_sTableFiles2Entries = $this->_oMain->getTableNameImages2Entries();

        $aSystem = $this->_oMain->getSystemInfo();
        $this->_sTable = $aSystem['table'];
        $this->_sTriggerTable = $aSystem['trigger_table'];
        $this->_sTriggerFieldId = $aSystem['trigger_field_id'];
        $this->_sTriggerFieldAuthor = $aSystem['trigger_field_author'];
        $this->_sTriggerFieldTitle = $aSystem['trigger_field_title'];
        $this->_sTriggerFieldComments = $aSystem['trigger_field_comments'];

        parent::__construct();
    }

    function getTableName ()
    {
        return $this->_sTable;
    }

    /**
     * @deprecated since version 10.0.0-B3 and can be removed in later versions.
     */
    function setTableNameFiles($sTable)
    {
    	$this->_sTableFiles = $sTable;
    }

    /**
     * @deprecated since version 10.0.0-B3 and can be removed in later versions.
     */
    function setTableNameFiles2Entries($sTable)
    {
    	$this->_sTableFiles2Entries = $sTable;
    }

    function getCommentsCountAll ($iId)
    {
        $sQuery = $this->prepare("SELECT `{$this->_sTriggerFieldComments}` FROM `{$this->_sTriggerTable}` WHERE `{$this->_sTriggerFieldId}` = ?", $iId);
        return (int)$this->getOne($sQuery);
    }

    function getCommentsCount ($iId, $iCmtVParentId = -1, $iAuthorId = 0, $sFilter = '')
    {
    	$aBindings = array(
    		'cmt_object_id' => $iId
    	);

        $sWhereClause = '';
        if((int)$iCmtVParentId >= 0) {
        	$aBindings['cmt_vparent_id'] = $iCmtVParentId;

            $sWhereClause .= " AND `{$this->_sTable}`.`cmt_vparent_id` = :cmt_vparent_id";
        }

        $sJoinClause = '';
        switch($sFilter) {
        	case BX_CMT_FILTER_FRIENDS:
        	case BX_CMT_FILTER_SUBSCRIPTIONS:
	            $oConnection = BxDolConnection::getObjectInstance($this->_oMain->getConnectionObject($sFilter));
	
	            $aQueryParts = $oConnection->getConnectedContentAsSQLParts($this->_sTable, 'cmt_author_id', $iAuthorId);
	            $sJoinClause .= ' ' . $aQueryParts['join'];
	            break;

        	case BX_CMT_FILTER_OTHERS:
        		$aBindings['cmt_author_id'] = $iAuthorId;

        		$sWhereClause .= " AND `{$this->_sTable}`.`cmt_author_id` <> :cmt_author_id";
        		break;
        }

        $sQuery = "SELECT COUNT(*) FROM `{$this->_sTable}` $sJoinClause WHERE `{$this->_sTable}`.`cmt_object_id` = :cmt_object_id" . $sWhereClause;
        return (int)$this->getOne($sQuery, $aBindings);
    }

    function getStructure($iObjectId, $iAuthorId = 0, $iParentId = 0, $sFilter = '', $aOrder = array())
    {
        $sSelectClause = $sJoinClause = $sWhereClause = "";

    	$aBindings = array(
            'cmt_object_id' => $iObjectId,
            'system_id' => $this->_oMain->getSystemId()
    	);

        if((int)$iParentId >= 0) {
            $aBindings['cmt_parent_id'] = $iParentId;

            $sWhereClause .= " AND `tc`.`cmt_parent_id` = :cmt_parent_id";
        }

        if(in_array($sFilter, array(BX_CMT_FILTER_FRIENDS, BX_CMT_FILTER_SUBSCRIPTIONS))) {
            $sConnection = $this->_oMain->getConnectionObject($sFilter);
            $aQueryParts = BxDolConnection::getObjectInstance($sConnection)->getConnectedContentAsSQLParts($this->_sTable, 'cmt_author_id', $iAuthorId);
            $sJoinClause .= ' ' . $aQueryParts['join'];
        }

        if(isset($aOrder['by']) && isset($aOrder['way']))
            switch($aOrder['by']) {
                case BX_CMT_ORDER_BY_DATE:
                    $sSelectClause .= ", `tc`.`cmt_time` AS `cmt_order`";
                    break;

                case BX_CMT_ORDER_BY_POPULAR:
                    $aOrderFields = array();
                    if($this->_oMain->getVoteObject(0) !== false)
                        $aOrderFields[] = "`ti`.`votes`";
                    if($this->_oMain->getScoreObject(0) !== false)
                        $aOrderFields[] = "`ti`.`score`";
                    
                    if(!empty($aOrderFields))
                        $sSelectClause .= ", (" . implode(' + ', $aOrderFields) . ") AS `cmt_order`";
                    else
                        $sSelectClause .= ", `tc`.`id` AS `cmt_order`";
                    break;
            }

        $sQuery = "SELECT
                `tc`.`cmt_id`, 
                `tc`.`cmt_replies`, 
                `tc`.`cmt_time` $sSelectClause
            FROM `{$this->_sTable}` AS `tc`
            LEFT JOIN `{$this->_sTableIds}` AS `ti` ON `tc`.`cmt_id` = `ti`.`cmt_id` AND `ti`.`system_id` = :system_id $sJoinClause
            WHERE `tc`.`cmt_object_id` = :cmt_object_id" . $sWhereClause;
        return $this->getAll($sQuery, $aBindings);
    }

    function getComments ($iId, $iCmtVParentId = 0, $iAuthorId = 0, $sFilter = '', $aOrder = array(), $iStart = 0, $iCount = -1)
    {
    	$aBindings = array(
    		'cmt_object_id' => $iId,
            'system_id' => $this->_oMain->getSystemId()
    	);
        $sFields = $sJoin = "";
        
        $sWhereParent = '';
        if((int)$iCmtVParentId >= 0) {
        	$aBindings['cmt_vparent_id'] = $iCmtVParentId;

            $sWhereParent = " AND `{$this->_sTable}`.`cmt_vparent_id` = :cmt_vparent_id";
        }

        if(in_array($sFilter, array(BX_CMT_FILTER_FRIENDS, BX_CMT_FILTER_SUBSCRIPTIONS))) {
            $oConnection = BxDolConnection::getObjectInstance($this->_oMain->getConnectionObject($sFilter));

            $aQueryParts = $oConnection->getConnectedContentAsSQLParts($this->_sTable, 'cmt_author_id', $iAuthorId);
            $sJoin .= ' ' . $aQueryParts['join'];
        }

        $sOrder = " ORDER BY `{$this->_sTable}`.`cmt_time` ASC";
        if(isset($aOrder['by']) && isset($aOrder['way'])) {
            $aOrder['way'] = strtoupper(in_array($aOrder['way'], array(BX_CMT_ORDER_WAY_ASC, BX_CMT_ORDER_WAY_DESC)) ? $aOrder['way'] : BX_CMT_ORDER_WAY_ASC);

            switch($aOrder['by']) {
                case BX_CMT_ORDER_BY_DATE:
                    $sOrder = " ORDER BY `{$this->_sTable}`.`cmt_time` " . $aOrder['way'];
                    break;

                case BX_CMT_ORDER_BY_POPULAR:
                    $oVote = $this->_oMain->getVoteObject(0);
                    $oScore = $this->_oMain->getScoreObject(0);
                    $aSortFields = array();
                    if($oVote !== false) {
                        array_push($aSortFields, '`' . $this->_sTableIds . '`.`votes`');
                    }
                    if($oScore !== false) {
                        array_push($aSortFields, '`' . $this->_sTableIds . '`.`score`');
                    }
                    if (count($aSortFields) == 0)
                        array_push($aSortFields, '`' . $this->_sTable . '`.`id`');
                    
                    $sOrder = " ORDER BY " . implode($aOrder['way'] . ', ', $aSortFields) . " " . $aOrder['way'];
                    break;
            }
        }
        
       	$sLimit = $iCount != -1 ? $this->prepareAsString(" LIMIT ?, ?", (int)$iStart, (int)$iCount) : '';

        $sQuery = "SELECT
                `{$this->_sTable}`.*,
                `{$this->_sTableIds}`.`id` AS `cmt_unique_id`
                $sFields
            FROM `{$this->_sTable}`
            LEFT JOIN `{$this->_sTableIds}` ON (`{$this->_sTable}`.`cmt_id` = `{$this->_sTableIds}`.`cmt_id` AND `{$this->_sTableIds}`.`system_id` = :system_id)
            $sJoin
            WHERE `{$this->_sTable}`.`cmt_object_id` = :cmt_object_id" . $sWhereParent . $sOrder . $sLimit;
        return $this->getAll($sQuery, $aBindings);
    }

    function getCommentsBy($aParams = array())
    {
    	$aMethod = array('name' => 'getAll', 'params' => array(0 => 'query', 1 => array()));
        $sSelectClause = $sJoinClause = $sWhereClause = $sOrderClause = $sLimitClause = "";

        $sSelectClause = "`{$this->_sTable}`.*";

        if(isset($aParams['object_id'])) {
            $aMethod['params'][1]['cmt_object_id'] = (int)$aParams['object_id'];

            $sWhereClause .= " AND `{$this->_sTable}`.`cmt_object_id` = :cmt_object_id";
        }

        switch($aParams['type']) {
            case 'id':
                $aMethod['name'] = 'getRow';
                $aMethod['params'][1]['id'] = (int)$aParams['id'];

                $sWhereClause .= " AND `{$this->_sTable}`.`cmt_id` = :id";
                break;

            case 'latest':
            	if(!empty($aParams['author'])) {
            		$aMethod['params'][1]['cmt_author_id'] = (int)$aParams['author'];

            		$sWhereClause .= " AND `{$this->_sTable}`.`cmt_author_id` " . (isset($aParams['others']) && (int)$aParams['others'] == 1 ? "<>" : "=") . " :cmt_author_id";
            	}

                $sOrderClause = "`{$this->_sTable}`.`cmt_time` DESC";
                $sLimitClause = "";
                if(isset($aParams['per_page']))
                	$sLimitClause = $this->prepareAsString("?, ?", $aParams['start'], $aParams['per_page']);

                break;

            case 'parent_id':
                $aMethod['params'][1]['cmt_parent_id'] = (int)$aParams['parent_id'];

                $sWhereClause .= " AND `{$this->_sTable}`.`cmt_parent_id` = :cmt_parent_id";

                $sOrderClause = "`{$this->_sTable}`.`cmt_time` ASC";
                $sLimitClause = "";
                if(isset($aParams['per_page']))
                    $sLimitClause = $this->prepareAsString("?, ?", $aParams['start'], $aParams['per_page']);

                break;

            case 'object_id':
                $aMethod['params'][1]['cmt_object_id'] = (int)$aParams['object_id'];

                $sWhereClause .= " AND `{$this->_sTable}`.`cmt_object_id` = :cmt_object_id";

                $sOrderClause = "`{$this->_sTable}`.`cmt_time` " . (!empty($aParams['order_way']) ? strtoupper($aParams['order_way']) : "ASC");
                $sLimitClause = "";
                if(isset($aParams['per_page']))
                    $sLimitClause = $this->prepareAsString("?, ?", $aParams['start'], $aParams['per_page']);

                break;

            case 'author_id':
                $aMethod['params'][1]['cmt_author_id'] = (int)$aParams['author_id'];

                $sWhereClause .= " AND `{$this->_sTable}`.`cmt_author_id` = :cmt_author_id";

                $sOrderClause = "`{$this->_sTable}`.`cmt_time` ASC";
                $sLimitClause = "";
                if(isset($aParams['per_page']))
                    $sLimitClause = $this->prepareAsString("?, ?", $aParams['start'], $aParams['per_page']);

                break;

            case 'search_ids':
                $aMethod['name'] = 'getColumn';

                $sSelectClause = "`{$this->_sTable}`.`cmt_id`";

                if (!empty($aParams['start']) && !empty($aParams['per_page']))
                    $sLimitClause = $this->prepareAsString("?, ?", $aParams['start'], $aParams['per_page']);
                elseif (!empty($aParams['per_page']))
                    $sLimitClause = $this->prepareAsString("?", $aParams['per_page']);

                $sWhereConditions = "1";
                foreach($aParams['search_params'] as $sSearchParam => $aSearchParam) {
                    $sSearchValue = "";
                    switch ($aSearchParam['operator']) {
                        case 'like':
                            $sSearchValue = " LIKE " . $this->escape("%" . $aSearchParam['value'] . "%");
                            break;

                        case 'in':
                            $sSearchValue = " IN (" . $this->implode_escape($aSearchParam['value']) . ")";
                            break;

                        case 'and':
                            $iResult = 0;
                            if (is_array($aSearchParam['value']))
                                foreach ($aSearchParam['value'] as $iValue)
                                    $iResult |= pow (2, $iValue - 1);
                            else 
                                $iResult = (int)$aSearchParam['value'];

                            $sSearchValue = " & " . $iResult . "";
                            break;

                        default:
                             $sSearchValue = " " . $aSearchParam['operator'] . " :" . $sSearchParam;
                             $aMethod['params'][1][$sSearchParam] = $aSearchParam['value'];                             
                    }

                    $sWhereConditions .= " AND `{$this->_sTable}`.`" . $sSearchParam . "`" . $sSearchValue;
                }

                $sWhereClause .= " AND (" . $sWhereConditions . ")"; 

                $sOrderClause .=  "`{$this->_sTable}`.`cmt_time` ASC";
                break;

            case 'all_ids':
                $aMethod['name'] = 'getColumn';

                $sSelectClause = "`{$this->_sTable}`.`cmt_id`";
                $sOrderClause =  "`{$this->_sTable}`.`cmt_time` ASC";
                break;
        }

        if(!empty($sOrderClause))
            $sOrderClause = 'ORDER BY ' . $sOrderClause;

        if(!empty($sLimitClause))
            $sLimitClause = 'LIMIT ' . $sLimitClause;

        $aMethod['params'][0] = "SELECT " . $sSelectClause . " FROM `{$this->_sTable}` " . $sJoinClause . " WHERE 1 " . $sWhereClause . " " . $sOrderClause . " " . $sLimitClause;
		return call_user_func_array(array($this, $aMethod['name']), $aMethod['params']);
    }

    function getComment ($iId, $iCmtId)
    {
        $sFields = $sJoin = "";

        $oVote = $this->_oMain->getVoteObject($iCmtId);
        if($oVote !== false) {
            $aSql = $oVote->getSqlParts($this->_sTableIds, 'id');

            $sFields .= $aSql['fields'];
            $sJoin .= $aSql['join'];
        }

        $sQuery = $this->prepare("SELECT
                `{$this->_sTable}`.*,
                `{$this->_sTableIds}`.`id` AS `cmt_unique_id`
                $sFields
            FROM `{$this->_sTable}`
            LEFT JOIN `{$this->_sTableIds}` ON (`{$this->_sTable}`.`cmt_id` = `{$this->_sTableIds}`.`cmt_id` AND `{$this->_sTableIds}`.`system_id` = ?)
            $sJoin
            WHERE `{$this->_sTable}`.`cmt_object_id` = ? AND `{$this->_sTable}`.`cmt_id` = ?
            LIMIT 1", $this->_oMain->getSystemId(), $iId, $iCmtId);
        return $this->getRow($sQuery);
    }

    function getCommentSimple ($iId, $iCmtId)
    {
        $sQuery = $this->prepare("SELECT * FROM {$this->_sTable} AS `c` WHERE `cmt_object_id` = ? AND `cmt_id` = ? LIMIT 1", $iId, $iCmtId);
        return $this->getRow($sQuery);
    }

    function removeComment ($iId, $iCmtId, $iCmtParentId)
    {
        $sQuery = $this->prepare("DELETE FROM {$this->_sTable} WHERE `cmt_object_id` = ? AND `cmt_id` = ? LIMIT 1", $iId, $iCmtId);
        if (!$this->query($sQuery))
            return false;

        if($iCmtParentId)
            $this->updateRepliesCount($iCmtParentId, -1);

        return true;
    }

    function saveImages($iSystemId, $iCmtId, $iImageId)
    {
        $sQuery = $this->prepare("INSERT IGNORE INTO `{$this->_sTableFiles2Entries}` SET `system_id`=?, `cmt_id`=?, `image_id`=?", $iSystemId, $iCmtId, $iImageId);
        return (int)$this->query($sQuery) > 0;
    }

    function getFiles($iSystemId, $iCmtId, $iId = false)
    {
    	$aBindings = array(
    		'system_id' => $iSystemId
    	);

        $sJoin = "";
        $sWhere = " AND `tf2e`.`system_id` = :system_id ";

        if($iCmtId !== false) {
        	$aBindings['cmt_id'] = $iCmtId;

            $sWhere .= " AND `tf2e`.`cmt_id` = :cmt_id ";
        }

        if($iId !== false) {
        	$aBindings['cmt_object_id'] = $iId;

            $sWhere .= " AND `te`.`cmt_object_id` = :cmt_object_id";
            $sJoin .= " INNER JOIN `{$this->_sTable}` AS `te` ON (`tf2e`.`cmt_id` = `te`.`cmt_id`) ";
        }

        $sQuery = "SELECT 
        		`tf2e`.*,
        		`tf`.`file_name` AS `file_name`,
        		`tf`.`mime_type` AS `mime_type`,
        		`tf`.`size` AS `size` 
        	FROM `{$this->_sTableFiles2Entries}` AS `tf2e` 
        	LEFT JOIN `{$this->_sTableFiles}` AS `tf` ON (`tf2e`.`image_id` = `tf`.`id`) " . $sJoin . " 
        	WHERE 1 " . $sWhere;

        return $this->getAll($sQuery, $aBindings);
    }

    function deleteImages($iSystemId, $iCmtId, $iImageId = false)
    {
        $sWhereAddon = "";
        $aBindings = array();

        if ($iSystemId !== false) {
            $aBindings['system_id'] = $iSystemId;

            $sWhereAddon .= " AND `system_id` = :system_id ";
        }

        if ($iCmtId !== false) {
            $aBindings['cmt_id'] = $iCmtId;

            $sWhereAddon .= " AND `cmt_id` = :cmt_id ";
        }

        if ($iImageId !== false) {
            $aBindings['image_id'] = $iImageId;

            $sWhereAddon .= " AND `image_id` = :image_id ";
        }

        return $this->query("DELETE FROM `{$this->_sTableFiles2Entries}` WHERE 1" . $sWhereAddon, $aBindings);
    }

    function updateRepliesCount($iCmtId, $iCount)
    {
        $sQuery = $this->prepare("UPDATE `{$this->_sTable}` SET `cmt_replies`=`cmt_replies`+? WHERE `cmt_id`=? LIMIT 1", $iCount, $iCmtId);
        return $this->query($sQuery);
    }

    function deleteAuthorComments ($iAuthorId, &$aFiles = null, &$aCmtIds = null)
    {
        $aSystem = $this->_oMain->getSystemInfo();

        $isDelOccured = 0;
        $sQuery = $this->prepare("SELECT `cmt_id`, `cmt_parent_id` FROM {$this->_sTable} WHERE `cmt_author_id` = ? AND `cmt_replies` = 0", $iAuthorId);
        $a = $this->getAll ($sQuery);
		foreach ($a as $r) {
            $sQuery = $this->prepare("DELETE FROM {$this->_sTable} WHERE `cmt_id` = ?", $r['cmt_id']);
            $this->query ($sQuery);

            $sQuery = $this->prepare("UPDATE {$this->_sTable} SET `cmt_replies` = `cmt_replies` - 1 WHERE `cmt_id` = ?", $r['cmt_parent_id']);
            $this->query ($sQuery);

            $aFilesMore = $this->convertImagesArray($this->getFiles($aSystem['system_id'], $r['cmt_id']));
            $this->deleteImages($aSystem['system_id'], $r['cmt_id']);
            if ($aFilesMore && null !== $aFiles)
                $aFiles = array_merge($aFiles, $aFilesMore);

            if (null !== $aCmtIds)
                $aCmtIds[] = $r['cmt_id'];

            $isDelOccured = 1;
        }
        $sQuery = $this->prepare("UPDATE {$this->_sTable} SET `cmt_author_id` = 0 WHERE `cmt_author_id` = ? AND `cmt_replies` != 0", $iAuthorId);
        $this->query ($sQuery);
        if ($isDelOccured)
            $this->query ("OPTIMIZE TABLE {$this->_sTable}");
    }

    function deleteObjectComments ($iObjectId, &$aFilesReturn = null, &$aCmtIds = null)
    {
        $aSystem = $this->_oMain->getSystemInfo();
        $aFiles = $this->convertImagesArray($this->getFiles($aSystem['system_id'], false, $iObjectId));

        if ($aFiles) {
            $sQuery = $this->prepare("DELETE FROM {$this->_sTableFiles2Entries} WHERE `system_id` = ? AND `image_id` IN(" . $this->implode_escape($aFiles) . ")", $aSystem['system_id']);
            $this->query($sQuery);
        }

        if (null !== $aCmtIds) {
            $sQuery = $this->prepare("SELECT `cmt_id` FROM {$this->_sTable} WHERE `cmt_object_id` = ?", $iObjectId);
            $aCmtIds = $this->getColumn ($sQuery);
        }

        $sQuery = $this->prepare("DELETE FROM {$this->_sTable} WHERE `cmt_object_id` = ?", $iObjectId);
        $this->query ($sQuery);
        $this->query ("OPTIMIZE TABLE {$this->_sTable}");

        if (null !== $aFilesReturn)
            $aFilesReturn = $aFiles;
    }

    function deleteAll ($iSystemId, &$aFiles = null, &$aCmtIds = null)
    {
        // get files
        if (null !== $aFiles)
            $aFiles = $this->convertImagesArray($this->getFiles($iSystemId, false));

        // delete files
        $this->deleteImages($iSystemId, false);

        if (null !== $aCmtIds)
            $aCmtIds = $this->getColumn ("SELECT `cmt_id` FROM {$this->_sTable}");

        // delete comments
        $sQuery = $this->prepare("TRUNCATE TABLE {$this->_sTable}");
        $this->query ($sQuery);
    }

    function deleteCmtIds ($iSystemId, $iCmtId)
    {
        $sQuery = $this->prepare("DELETE FROM {$this->_sTableIds} WHERE `system_id` = ? AND `cmt_id` = ?", $iSystemId, $iCmtId);
        return $this->query ($sQuery);
    }

	function getObjectAuthorId($iId)
    {
        $sQuery = $this->prepare("SELECT `{$this->_sTriggerFieldAuthor}` FROM `{$this->_sTriggerTable}` WHERE `{$this->_sTriggerFieldId}` = ? LIMIT 1", $iId);
        return $this->getOne($sQuery);
    }

    function getObjectTitle($iId)
    {
        $sQuery = $this->prepare("SELECT `{$this->_sTriggerFieldTitle}` FROM `{$this->_sTriggerTable}` WHERE `{$this->_sTriggerFieldId}` = ? LIMIT 1", $iId);
        return $this->getOne($sQuery);
    }

    function updateTriggerTable($iId, $iCount)
    {
        $sQuery = $this->prepare("UPDATE `{$this->_sTriggerTable}` SET `{$this->_sTriggerFieldComments}` = ? WHERE `{$this->_sTriggerFieldId}` = ? LIMIT 1", $iCount, $iId);
        return $this->query($sQuery);
    }

    function getUniqId($iSystemId, $iCmtId, $iAuthorId = 0)
    {
        $sQuery = $this->prepare("SELECT `id` FROM `{$this->_sTableIds}` WHERE `system_id` = ? AND `cmt_id` = ?", $iSystemId, $iCmtId);
        if(($iUniqId = (int)$this->getOne($sQuery)) != 0)
            return $iUniqId;

        if(empty($iAuthorId))
            $iAuthorId = bx_get_logged_profile_id();

        $sQuery = $this->prepare("INSERT INTO `{$this->_sTableIds}` SET `system_id` = ?, `cmt_id` = ?, `author_id` = ?", $iSystemId, $iCmtId, $iAuthorId);
        if(!$this->query($sQuery))
            return false;

        return $this->lastId();
    }

    protected function convertImagesArray($a)
    {
        if (!$a || !is_array($a))
            return array();

        $aFiles = array ();
        foreach ($a as $aFile)
            $aFiles[] = $aFile['image_id'];
        return $aFiles;
    }
}

/** @} */